Kartell is an Italian company that makes and sells plastic contemporary furniture. It is headquartered in Noviglio , Metropolitan City of Milan , Italy, and it is a subsidiary of Felofin .
70-553: The company began manufacturing automobile accessories in 1949. It expanded into home furnishings in 1963. It was founded by Giulio Castelli and Anna Castelli Ferrieri . Kartell became well-known due to the work of designer and architect Anna Castelli Ferrieri. The company opened its first store in the United States in 1998, when a Kartell U.S. outlet opened on Greene Street in New York City . Ivan Luini, president of
140-580: A TB117-2013 tag on furniture, and verify with retailers that products do not contain flame retardants." Liquid resin blends and isocyanates may contain hazardous or regulated components. Isocyanates are known skin and respiratory sensitizers. Additionally, amines, glycols, and phosphate present in spray polyurethane foams present risks. Exposure to chemicals that may be emitted during or after application of polyurethane spray foam (such as isocyanates) are harmful to human health and therefore special precautions are required during and after this process. In
210-537: A U.S. Monsanto / Bayer joint venture, also began making polyurethane chemicals. In 1960 more than 45,000 metric tons of flexible polyurethane foams were produced. The availability of chlorofluoroalkane blowing agents, inexpensive polyether polyols, and methylene diphenyl diisocyanate (MDI) allowed polyurethane rigid foams to be used as high-performance insulation materials. In 1967, urethane-modified polyisocyanurate rigid foams were introduced, offering even better thermal stability and flammability resistance. During
280-569: A blowing catalyst also called A-99. A typical Lewis acidic catalyst is dibutyltin dilaurate . The process is highly sensitive to the nature of the catalyst and is also known to be autocatalytic . Factors affecting catalyst selection include balancing three reactions: urethane (polyol+isocyanate, or gel) formation, the urea (water+isocyanate, or "blow") formation, or the isocyanate trimerization reaction (e.g., using potassium acetate, to form isocyanurate rings). A variety of specialized catalysts have been developed. Surfactants are used to modify
350-805: A distinguished list of honors and awards that she has received; receiving her first award at the age of 29. She received: • Gold Medals, Milan Triennale, one in 1947 and another in 1950 • Oscar Plast Award, London, 1968 • Silver Medal Oesterreichisches Bauzentrum, Vienna, 1969 • Gold Medal, Monza, 1972; MACEF Award Milan, 1972 • Bundespreis Gute Form, West German Government, Bonn, 1973 • SMAU Award, Milan, 1977; Product Design Award, Resource Council, New York, 1979 and 1984 • Premio Compasso d’Oro Awards, Adi, Milan in 1979 and again in 1987 • Design Award, American Societies of Industrial Design, Museum of Art, San Diego, 1981 • Gold Medal, BIO9, Llubljana, 1982; Furniture Fair Design Award, Clogne, 1982 and 1987 • Industrial Design Magazine Annual Award, New York, 1983 • Fine Furniture of
420-431: A full suite of statistical process control software. Add-ons to dispense equipment include nucleation or gas injection units, and third or fourth stream capability for adding pigments or metering in supplemental additive packages. Distinct from pour-in-place, bun and boardstock, and coating applications, the production of piece parts requires tooling to contain and form the reacting liquid. The choice of mold-making material
490-475: A group of polymers. Unlike polyethylene and polystyrene polyurethanes can be produced from a wide range of starting materials resulting various polymers within the same group. This chemical variety produces polyurethanes with different chemical structures leading to many different applications . These include rigid and flexible foams , and coatings, adhesives, electrical potting compounds, and fibers such as spandex and polyurethane laminate (PUL). Foams are
560-403: A high molecular weight polyether backbone. They are used to increase the load-bearing properties of low-density high-resiliency (HR) foam, as well as add toughness to microcellular foams and cast elastomers. Initiators such as ethylenediamine and triethanolamine are used to make low molecular weight rigid foam polyols that have built-in catalytic activity due to the presence of nitrogen atoms in
630-420: A high percentage of fluorine–carbon bonds, which are the strongest bonds among all chemical bonds, fluorinated polyurethanes exhibit resistance to UV, acids, alkali, salts, chemicals, solvents, weathering, corrosion, fungi and microbial attack. These have been used for high performance coatings and paints. Phosphorus -containing polyols are available that become chemically bonded to the polyurethane matrix for
700-1479: A mix head, and a control unit. Often, a conditioning or heater–chiller unit is added to control material temperature in order to improve mix efficiency, cure rate, and to reduce process variability. Choice of dispense equipment components depends on shot size, throughput, material characteristics such as viscosity and filler content, and process control . Material day tanks may be single to hundreds of gallons in size and may be supplied directly from drums, IBCs ( intermediate bulk containers , such as caged IBC totes ), or bulk storage tanks . They may incorporate level sensors, conditioning jackets, and mixers. Pumps can be sized to meter in single grams per second up to hundreds of pounds per minute. They can be rotary, gear, or piston pumps, or can be specially hardened lance pumps to meter liquids containing highly abrasive fillers such as chopped or hammer-milled glass fiber and wollastonite . The pumps can drive low-pressure (10 to 30 bar, 1 to 3 MPa) or high-pressure (125 to 250 bar, 12.5 to 25.0 MPa) dispense systems. Mix heads can be simple static mix tubes, rotary-element mixers, low-pressure dynamic mixers, or high-pressure hydraulically actuated direct impingement mixers . Control units may have basic on/off and dispense/stop switches, and analogue pressure and temperature gauges, or may be computer-controlled with flow meters to electronically calibrate mix ratio, digital temperature and level sensors, and
770-602: A mold. The addition of fillers, such as milled glass, mica , and processed mineral fibers, gave rise to reinforced RIM (RRIM), which provided improvements in flexural modulus (stiffness), reduction in coefficient of thermal expansion and better thermal stability. This technology was used to make the first plastic-body automobile in the United States, the Pontiac Fiero , in 1983. Further increases in stiffness were obtained by incorporating pre-placed glass mats into
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#1732765990119840-423: A polymer that is very stretchy, short chains with many crosslinks produce a hard polymer while long chains and intermediate crosslinking give a polymer useful for making foam. The choices available for the isocyanates and polyols, in addition to other additives and processing conditions allow polyurethanes to have the very wide range of properties that make them such widely used polymers. The main ingredients to make
910-1079: A polyurethane are di- and tri- isocyanates and polyols . Other materials are added to aid processing the polymer or to modify the properties of the polymer. PU foam formulation sometimes have water added too. Isocyanates used to make polyurethane have two or more isocyanate groups on each molecule. The most commonly used isocyanates are the aromatic diisocyanates, toluene diisocyanate (TDI) and methylene diphenyl diisocyanate , (MDI). These aromatic isocyanates are more reactive than aliphatic isocyanates. TDI and MDI are generally less expensive and more reactive than other isocyanates. Industrial grade TDI and MDI are mixtures of isomers and MDI often contains polymeric materials. They are used to make flexible foam (for example slabstock foam for mattresses or molded foams for car seats), rigid foam (for example insulating foam in refrigerators) elastomers (shoe soles, for example), and so on. The isocyanates may be modified by partially reacting them with polyols or introducing some other materials to reduce volatility (and hence toxicity) of
980-598: A polyurethane system, or simply a system. The isocyanate is commonly referred to in North America as the 'A-side' or just the 'iso'. The blend of polyols and other additives is commonly referred to as the 'B-side' or as the 'poly'. This mixture might also be called a 'resin' or 'resin blend'. In Europe the meanings for 'A-side' and 'B-side' are reversed. Resin blend additives may include chain extenders, cross linkers , surfactants , flame retardants , blowing agents , pigments , and fillers . Polyurethane can be made in
1050-410: A sorbitol/water solution ( f = 2.75). Polyols for rigid applications use higher functionality initiators such as sucrose ( f = 8), sorbitol ( f = 6), toluenediamine ( f = 4), and Mannich bases ( f = 4). Propylene oxide and/or ethylene oxide is added to the initiators until the desired molecular weight is achieved. The order of addition and
1120-541: A suitable polyol precursor. Polyester polyols are made by the polycondensation of multifunctional carboxylic acids and polyhydroxyl compounds. They can be further classified according to their end use. Higher molecular weight polyols (molecular weights from 2,000 to 10,000) are used to make more flexible polyurethanes while lower molecular weight polyols make more rigid products. Polyols for flexible applications use low functionality initiators such as dipropylene glycol ( f = 2), glycerine ( f = 3), or
1190-590: A variety of densities and hardnesses by varying the isocyanate, polyol or additives. Fully reacted polyurethane polymer is chemically inert . No exposure limits have been established in the U.S. by OSHA ( Occupational Safety and Health Administration ) or ACGIH ( American Conference of Governmental Industrial Hygienists ). It is not regulated by OSHA for carcinogenicity. Polyurethanes are combustible. Decomposition from fire can produce significant amounts of carbon monoxide and hydrogen cyanide , in addition to nitrogen oxides, isocyanates, and other toxic products. Due to
1260-531: Is dependent on the expected number of uses to end-of-life (EOL), molding pressure, flexibility, and heat transfer characteristics. RTV silicone is used for tooling that has an EOL in the thousands of parts. It is typically used for molding rigid foam parts, where the ability to stretch and peel the mold around undercuts is needed. The heat transfer characteristic of RTV silicone tooling is poor. High-performance, flexible polyurethane elastomers are also used in this way. Epoxy, metal-filled epoxy, and metal-coated epoxy
1330-434: Is especially the case if the yellowing happens on the outer portions of a large foam, as the deterioration of properties in the outer portion has little effect on the overall bulk properties of the foam itself. It has been reported that exposure to visible light can affect the variability of some physical property test results. Higher-energy UV radiation promotes chemical reactions in foam, some of which are detrimental to
1400-427: Is excellent. Finally, molded or milled polypropylene is used to create low-volume tooling for molded gasket applications. Instead of many expensive metal molds, low-cost plastic tooling can be formed from a single metal master, which also allows greater design flexibility. The heat transfer characteristic of polypropylene tooling is poor, which must be taken into consideration during the formulation process. In 2007,
1470-469: Is of particular interest in the area of polyurethane coatings, where light stability is a critical factor and is the main reason that aliphatic isocyanates are used in making polyurethane coatings. When PU foam, which is made using aromatic isocyanates, is exposed to visible light, it discolors, turning from off-white to yellow to reddish brown. It has been generally accepted that apart from yellowing, visible light has little effect on foam properties. This
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#17327659901191540-601: Is sometimes made using small amounts of blowing agents to give less dense foam, better cushioning/energy absorption or thermal insulation. In the early 1990s, because of their impact on ozone depletion , the Montreal Protocol restricted the use of many chlorine -containing blowing agents, such as trichlorofluoromethane (CFC-11). By the late 1990s, blowing agents such as carbon dioxide , pentane , 1,1,1,2-tetrafluoroethane (HFC-134a) and 1,1,1,3,3-pentafluoropropane (HFC-245fa) were widely used in North America and
1610-405: Is used for tooling that has an EOL in the tens of thousands of parts. It is typically used for molding flexible foam cushions and seating, integral skin and microcellular foam padding, and shallow-draft RIM bezels and fascia. The heat transfer characteristic of epoxy tooling is fair; the heat transfer characteristic of metal-filled and metal-coated epoxy is good. Copper tubing can be incorporated into
1680-484: The 1960s, automotive interior safety components, such as instrument and door panels, were produced by back-filling thermoplastic skins with semi-rigid foam. In 1969, Bayer exhibited an all-plastic car in Düsseldorf , Germany. Parts of this car, such as the fascia and body panels, were manufactured using a new process called reaction injection molding (RIM), in which the reactants were mixed and then injected into
1750-534: The Componibili is still one of Kartell's best selling furniture items. A more compiled list of all of Ferrieri’s exhibitions are listed below. Ferrieri worked as art director for Kartell from 1976 to 1987, and is most known for her use of materials such as metal and polyurethane . Through her use of plastics, a fairly unused furniture material at the time, she was able to create novel forms that were both elegant and functional. She mediated between creativity of
1820-613: The EU, although chlorinated blowing agents remained in use in many developing countries. Later, HFC-134a was also banned due to high ODP and GWP readings, and HFC-141B was introduced in early 2000s as an alternate blowing agent in developing nations. Polyurethanes are produced by reacting di isocyanates with polyols , often in the presence of a catalyst , or upon exposure to ultraviolet radiation. Common catalysts include tertiary amines , such as DABCO , DMDEE , or metallic soaps , such as dibutyltin dilaurate . The stoichiometry of
1890-535: The Environment). In Europe, health and safety information is available from ISOPA, the European Diisocyanate and Polyol Producers Association. The methods of manufacturing polyurethane finished goods range from small, hand pour piece-part operations to large, high-volume bunstock and boardstock production lines. Regardless of the end-product, the manufacturing principle is the same: to meter
1960-603: The Kartell headquarters (with it being made from brilliant red blocks), a residential building on Via Marchiondi in Milan, and several offices and factories in Alfa Romeo. All of these were created in collaboration with Ignazio Gardella . Although, according to biographer Cristina Morozzi, Gardella took the recognition for projects that Ferrieri worked on because he wanted to be the master of his own studio. In 1982, she created
2030-516: The Milan Domus Academy from 1987 – 1992. She also took on a variety of commissions, including: “a sofa design for Arflex, a chair for Matteo Grassi, and flatware for Sambonet” Ferrieri died on 22 June 2006. in her home in Milan, at the age of 87, from complications of lung disease. She was survived by her husband, Giulio Castelli; daughter, Marial Castelli; and son, Valerio Castelli. Giulio Castelli passed away four months later at
2100-466: The RIM mold cavity, also known broadly as resin injection molding , or structural RIM. Starting in the early 1980s, water-blown microcellular flexible foams were used to mold gaskets for automotive panels and air-filter seals, replacing PVC polymers. Polyurethane foams are used in many automotive applications including seating, head and arm rests, and headliners. Polyurethane foam (including foam rubber)
2170-458: The U.S. division at that time, oversaw the opening of additional stores in Miami , San Francisco , Atlanta , Boston and Los Angeles . Kartell's retail marketing strategy is to stock items in various styles and colors at prices that appeal to impulse buyers. The company grosses $ 100 million per year. In addition to its stores, Kartell furnishings are sold by more than 150 independent retailers in
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2240-673: The United States, additional health and safety information can be found through organizations such as the Polyurethane Manufacturers Association (PMA) and the Center for the Polyurethanes Industry (CPI), as well as from polyurethane system and raw material manufacturers. Regulatory information can be found in the Code of Federal Regulations Title 21 (Food and Drugs) and Title 40 (Protection of
2310-508: The United States. At the time of his death, Luini was in discussions for Kartell's plastic furnishings to be used in a hotel chain being designed by Philippe Starck . The company is a subsidiary of Felofin . Its chairman, chief executive officer and president is Claudio Luti . The current designer for the company is Ferruccio Laviani, who has created a style described by Pianeta Design as "Bourgiemania". Anna Castelli Ferrieri Anna Castelli Ferrieri (6 August 1918 - 22 June 2006)
2380-458: The Year Award, Hamburg, 1984 Ferrieri openly admitted that working women faced obstacles in the public spheres as well as in the private spheres of life. Anna Ferrieri found that balancing her roles of a designer, wife, and mother were often difficult. During the 1950s through the 1960s, the theme of incompatibility of professional and familial life was a key issue discussed publicly through
2450-471: The addition of blowing agents by mechanically frothing the polyol prior to use. These are tough elastomeric materials used in covering car steering wheels or shoe soles . The properties of a polyurethane are greatly influenced by the types of isocyanates and polyols used to make it. Long, flexible segments, contributed by the polyol, give soft, elastic polymer. High amounts of crosslinking give tough or rigid polymers. Long chains and low crosslinking give
2520-412: The age of 86. Polyurethane Polyurethane ( / ˌ p ɒ l i ˈ jʊər ə ˌ θ eɪ n , - j ʊəˈr ɛ θ eɪ n / ; often abbreviated PUR and PU ) refers to a class of polymers composed of organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene , polyurethane term does not refer to the single type of polymer but
2590-588: The amounts of each oxide affect many polyol properties, such as compatibility, water-solubility, and reactivity. Polyols made with only propylene oxide are terminated with secondary hydroxyl groups and are less reactive than polyols capped with ethylene oxide, which contain primary hydroxyl groups. Incorporating carbon dioxide into the polyol structure is being researched by multiple companies. Graft polyols (also called filled polyols or polymer polyols) contain finely dispersed styrene–acrylonitrile , acrylonitrile , or polyurea (PHD) polymer solids chemically grafted to
2660-1867: The backbone. A special class of polyether polyols, poly(tetramethylene ether) glycols , which are made by polymerizing tetrahydrofuran , are used in high performance coating, wetting and elastomer applications. Conventional polyester polyols are based on virgin raw materials and are manufactured by the direct polyesterification of high-purity diacids and glycols, such as adipic acid and 1,4-butanediol. Polyester polyols are usually more expensive and more viscous than polyether polyols, but they make polyurethanes with better solvent, abrasion, and cut resistance. Other polyester polyols are based on reclaimed raw materials. They are manufactured by transesterification ( glycolysis ) of recycled poly(ethyleneterephthalate) (PET) or dimethylterephthalate (DMT) distillation bottoms with glycols such as diethylene glycol. These low molecular weight, aromatic polyester polyols are used in rigid foam, and bring low cost and excellent flammability characteristics to polyisocyanurate (PIR) boardstock and polyurethane spray foam insulation. Specialty polyols include polycarbonate polyols, polycaprolactone polyols, polybutadiene polyols, and polysulfide polyols. The materials are used in elastomer, sealant, and adhesive applications that require superior weatherability, and resistance to chemical and environmental attack. Natural oil polyols derived from castor oil and other vegetable oils are used to make elastomers, flexible bunstock, and flexible molded foam. Co-polymerizing chlorotrifluoroethylene or tetrafluoroethylene with vinyl ethers containing hydroxyalkyl vinyl ether produces fluorinated (FEVE) polyols. Two-component fluorinated polyurethanes prepared by reacting FEVE fluorinated polyols with polyisocyanate have been used to make ambient cure paints and coatings. Since fluorinated polyurethanes contain
2730-451: The body of the tool, allowing hot water to circulate and heat the mold surface. Aluminum is used for tooling that has an EOL in the hundreds of thousands of parts. It is typically used for molding microcellular foam gasketing and cast elastomer parts, and is milled or extruded into shape. Mirror-finish stainless steel is used for tooling that imparts a glossy appearance to the finished part. The heat transfer characteristic of metal tooling
2800-788: The characteristics of both foam and non-foam polyurethane polymers. They take the form of polydimethylsiloxane-polyoxyalkylene block copolymers, silicone oils, nonylphenol ethoxylates, and other organic compounds. In foams, they are used to emulsify the liquid components, regulate cell size, and stabilize the cell structure to prevent collapse and sub-surface voids. In non-foam applications they are used as air release and antifoaming agents, as wetting agents, and are used to eliminate surface defects such as pin holes, orange peel, and sink marks. Polyurethanes are produced by mixing two or more liquid streams. The polyol stream contains catalysts, surfactants, blowing agents (when making polyurethane foam insulation) and so on. The two components are referred to as
2870-698: The designers and the needs of the technical project achievability – all while still creating her own designs. Ferrieri married Giulio Castelli and the couple led the way in Italian modern design with Kartell throughout the 60s, 70s and 80s. In addition to her work, she founded and was a member of several organizations including; The Movement of Architecture Studies (MAS) of Milan, 1945; National Institution of Urban Planning (NIU), 1952-1956 and later became president from 1969-1971; Italian Industrial Design Association (IDA) in 1956. She also published two books; one in 1984, “From Project to Product: Plastic and Design”, and
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2940-500: The exception of ethylene glycol, since its derived bis-phenyl urethane undergoes unfavorable degradation at high hard segment levels. Diethanolamine and triethanolamine are used in flex molded foams to build firmness and add catalytic activity. Diethyltoluenediamine is used extensively in RIM, and in polyurethane and polyurea elastomer formulations. Polyurethane catalysts can be classified into two broad categories, basic and acidic amine . Tertiary amine catalysts function by enhancing
3010-782: The first chair from a single mould in 1968. Anna Castelli Ferrieri laid the Kartell foundations on geometric shapes, bold color, and highly polished finishes. In 1972, Ferrieri and her husband exhibited artwork in the “Italy: The New Domestic Landscape” exhibition at the Museum of Modern Art in New York. This exhibition featured her “Componobili” of 1969. One of her best known works is the Componibili. Componibilis are stacking module storage pieces. These units have been described as, "Flexible, functional and practical". and as "instantly endearing and slightly futuristic elegance that suits any situation with ease." Today, even after 40 years of production
3080-1052: The first table to be made of entirely injection molded plastic. In 1988, she created arm lounge chair that had a “marbleized” injection blend of plastic. Anna Ferrieri won numerous awards, including the Compasso d’Oro, an industrial design award given by ADI to acknowledge and promote high quality designs. However, her work is still in production which speaks the highest praise. • Design Italian Style, Hallmark Gallery, New York, 1968 • Italy: The New Domestic Landscape, Museum of Modern Art, New York, 1972 • Design and Design, Palazzo delle Stelline, Milan, 1979 • Italienisches Moebel Design, Stadtmuseum, Cologne, 1980 • Dal Cucchiaio alla Città, Milan Triennale, 1983 • Italian Women Designers, Takashimaya Stores, Tokyo, 1985 • Anna Castelli Ferrieri per Kartell, Galliano, Turin, 1985 • Anna Castelli Ferrieri at Gallery Modus, Berlin, 1986 • Sedersi Kartell, La Rinascente, Milan, 1988 • Industrial Elegance, Pacific Design Center, Los Angeles, 1992 Anna Castelli Ferrieri has
3150-522: The flammability of the material, it has to be treated with flame retardants (at least in case of furniture), almost all of which are considered harmful. California later issued Technical Bulletin 117 2013 which allowed most polyurethane foam to pass flammability tests without the use of flame retardants. Green Science Policy Institute states: "Although the new standard can be met without flame retardants, it does NOT ban their use. Consumers who wish to reduce household exposure to flame retardants can look for
3220-424: The foam structure. Polyurethanes may degrade due to hydrolysis . This is a common problem with shoes left in a closet, and reacting with moisture in the air. Microbial degradation of polyurethane is believed to be due to the action of esterase , urethanase , hydrolase and protease enzymes. The process is slow as most microbes have difficulty moving beyond the surface of the polymer. Susceptibility to fungi
3290-536: The furniture company Kartell , which would become a leading company in the manufacture of high-quality plastic furniture, lighting, and homewares. Plastic at this time was considered to be an industrial material and was not typically seen inside the home. According to historian Catharine Rossi, Ferrieri experienced problems in partnership due to her trouble in balancing her role as a wife and as an architect designer. She only agreed to work at Kartell, per her husband’s request, after two of his business partners left. As
3360-479: The global consumption of polyurethane raw materials was above 12 million metric tons, and the average annual growth rate was about 5%. Revenues generated with PUR on the global market are expected to rise to approximately US$ 75 billion by 2022. As they are such an important class of materials, research is constantly taking place and papers published. Polyurethanes, especially those made using aromatic isocyanates, contain chromophores that interact with light. This
3430-621: The hard segments and consequent powerful hydrogen bonding contributes to high tensile strength, elongation, and tear resistance values. The choice of chain extender also determines flexural, heat, and chemical resistance properties. The most important chain extenders are ethylene glycol , 1,4-butanediol (1,4-BDO or BDO), 1,6-hexanediol , cyclohexane dimethanol and hydroquinone bis(2-hydroxyethyl) ether (HQEE). All of these glycols form polyurethanes that phase separate well and form well defined hard segment domains, and are melt processable. They are all suitable for thermoplastic polyurethanes with
3500-424: The hard segments, which are formed from the isocyanate and chain extenders, are stiff and immobile. As the hard segments are covalently coupled to the soft segments, they inhibit plastic flow of the polymer chains, thus creating elastomeric resiliency. Upon mechanical deformation, a portion of the soft segments are stressed by uncoiling, and the hard segments become aligned in the stress direction. This reorientation of
3570-469: The internal and leading designer at Kartell, Anna Ferreri lead the way for innovative designs that led the company. In the 1960s and 1970s, furniture contributed more growth to the Kartell company over any other divisions of the company. This innovative furniture became the image of the company and the products that represented this image were the colored fitted furniture, the flower boxes, and the stools designed by Anna Castelli Ferrieri. Anna Ferrieri designed
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#17327659901193640-953: The isocyanates, decrease their freezing points to make handling easier or to improve the properties of the final polymers. Aliphatic and cycloaliphatic isocyanates are used in smaller quantities, most often in coatings and other applications where color and transparency are important since polyurethanes made with aromatic isocyanates tend to darken on exposure to light. The most important aliphatic and cycloaliphatic isocyanates are 1,6-hexamethylene diisocyanate (HDI), 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethyl-cyclohexane ( isophorone diisocyanate , IPDI), and 4,4′-diisocyanato dicyclohexylmethane (H 12 MDI or hydrogenated MDI). Other more specialized isocyanates include Tetramethylxylylene diisocyanate (TMXDI). Polyols are polymers in their own right and have on average two or more hydroxyl groups per molecule. They can be converted to polyether polyols by co-polymerizing ethylene oxide and propylene oxide with
3710-455: The largest application accounting for 67% of all polyurethane produced in 2016. A polyurethane is typically produced by reacting a polymeric isocyanate with a polyol . Since a polyurethane contains two types of monomers, which polymerize one after the other, they are classed as alternating copolymers . Both the isocyanates and polyols used to make a polyurethane contain two or more functional groups per molecule. Global production in 2019
3780-506: The liquid isocyanate and resin blend at a specified stoichiometric ratio, mix them together until a homogeneous blend is obtained, dispense the reacting liquid into a mold or on to a surface, wait until it cures, then demold the finished part. Although the capital outlay can be high, it is desirable to use a meter-mix or dispense unit for even low-volume production operations that require a steady output of finished parts. Dispense equipment consists of material holding (day) tanks, metering pumps,
3850-537: The newsletter, 8th Pax Romana. The conversation developed into expectations of women and the primary roles as mothers and how these roles influence possibilities for careers. In 1971, one member of the AIDIA, said the biggest obstacle in women’s liberation was family. In the early 1970s, Ferrieri was asked by one of her husband’s aunts to join Soroptimists, which was an international feminist organization. By 1973, she
3920-429: The nucleophilicity of the diol component. Alkyl tin carboxylates, oxides and mercaptides oxides function as mild Lewis acids in accelerating the formation of polyurethane. As bases, traditional amine catalysts include triethylenediamine (TEDA, also called DABCO , 1,4-diazabicyclo[2.2.2]octane), dimethylcyclohexylamine (DMCHA), dimethylethanolamine (DMEA), Dimethylaminoethoxyethanol and bis-(2-dimethylaminoethyl)ether,
3990-451: The original bubbles or cells remain intact, or "open-cell", where the bubbles have broken but the edges of the bubbles are stiff enough to retain their shape, in extreme cases reticulated foams can be formed. Open-cell foams feel soft and allow air to flow through, so they are comfortable when used in seat cushions or mattresses . Closed-cell foams are used as rigid thermal insulation . High-density microcellular foams can be formed without
4060-490: The phase separation of the hard and soft copolymer segments of the polymer, such that the urethane hard segment domains serve as cross-links between the amorphous polyether (or polyester) soft segment domains. This phase separation occurs because the mainly nonpolar, low melting soft segments are incompatible with the polar, high melting hard segments. The soft segments, which are formed from high molecular weight polyols, are mobile and are normally present in coiled formation, while
4130-415: The presence of a gas, or blowing agent , during the polymerization step. This is commonly achieved by adding small amounts of water, which reacts with isocyanates to form CO 2 gas and an amine , via an unstable carbamic acid group. The amine produced can also react with isocyanates to form urea groups, and as such the polymer will contain both these and urethane linkers. The urea is not very soluble in
4200-778: The production of fibers and flexible foams and PUs were applied on a limited scale as aircraft coating during World War II . Polyisocyanates became commercially available in 1952, and production of flexible polyurethane foam began in 1954 by combining toluene diisocyanate (TDI) and polyester polyols. These materials were also used to produce rigid foams, gum rubber, and elastomers . Linear fibers were produced from hexamethylene diisocyanate (HDI) and 1,4-Butanediol (BDO). DuPont introduced polyethers, specifically poly(tetramethylene ether) glycol , in 1956. BASF and Dow Chemical introduced polyalkylene glycols in 1957. Polyether polyols were cheaper, easier to handle and more water-resistant than polyester polyols. Union Carbide and Mobay ,
4270-451: The reaction between polyamines and cyclic carbonates to produce polyhydroxyurethanes . Chain extenders ( f = 2) and cross linkers ( f ≥ 3) are low molecular weight hydroxyl and amine terminated compounds that play an important role in the polymer morphology of polyurethane fibers, elastomers, adhesives, and certain integral skin and microcellular foams. The elastomeric properties of these materials are derived from
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#17327659901194340-468: The reaction mixture and tends to form separate "hard segment" phases consisting mostly of polyurea . The concentration and organization of these polyurea phases can have a significant impact on the properties of the foam. The type of foam produced can be controlled by regulating the amount of blowing agent and also by the addition of various surfactants which change the rheology of the polymerising mixture. Foams can be either "closed-cell", where most of
4410-507: The second book was published in 1991, “The Interface of Material”, which explains the responsible behavior on the part of designers. In addition, she also has published a profound list of articles. Ferrieri was a pioneering architect, commonly associated with post war Italian Modern Design. Her design focused on technological innovation through the use of new materials, like plastic. Ferrieri created more than 50 architectural projects, but some of her most famous and iconic works are as follow;
4480-430: The starting materials must be carefully controlled as excess isocyanate can trimerise , leading to the formation of rigid polyisocyanurates . The polymer usually has a highly crosslinked molecular structure, resulting in a thermosetting material which does not melt on heating; although some thermoplastic polyurethanes are also produced. The most common application of polyurethane is as solid foams , which requires
4550-623: The use as flame retardants . This covalent linkage prevents migration and leaching of the organophosphorus compound . Interest in sustainable "green" products raised interest in polyols derived from vegetable oils . Various oils used in the preparation polyols for polyurethanes include soybean oil , cottonseed oil , neem seed oil , and castor oil . Vegetable oils are functionalized in various ways and modified to polyetheramides , polyethers , alkyds , etc. Renewable sources used to prepare polyols may be fatty acids or dimer fatty acids . Some biobased and isocyanate-free polyurethanes exploit
4620-489: Was 25 million metric tonnes, accounting for about 6% of all polymers produced in that year. Otto Bayer and his coworkers at IG Farben in Leverkusen, Germany, first made polyurethanes in 1937. The new polymers had some advantages over existing plastics that were made by polymerizing olefins or by polycondensation , and were not covered by patents obtained by Wallace Carothers on polyesters . Early work focused on
4690-403: Was a well-known journalist, director, and critic of city's legendary Teatro del C'omegno; a highly regarded theater company. Her husband, Giulio Castelli, was a chemical engineer and she later became his Kartell business partner. In 1988, the couple sold their company to Claudio Luti, their son in law, and retired. Even after retirement, Ferrieri remained active in the design field. She taught at
4760-440: Was an Italian architect and industrial designer. She is most known for her influence in the use of plastics as a mainstream design material and her cofounding of Kartell , an Italian contemporary furniture company. Ferrieri was born on 6 August 1918 in Milan, Italy. She was one of the first women to study at Milan Polytechnic University , from which she graduated in 1943 with a degree in architecture. During her studies, Ferrieri
4830-568: Was influenced by Italian Rationalist architect Franco Albini , whose work and theory focused on reduction, function, and rigorous beauty. She was also influenced by the simplicity and functionality championed by the Bauhaus school of art, architecture, and design in Germany. After her studies, from 1946 to1947, she worked as an editor at the architecture magazine Costruzioni. In 1949, Ferrieri joined her husband, Giulio Castelli, in founding
4900-508: Was the president of this organization and presented “International and interdisciplinary action for the promotion of human rights and in particular the condition of women” to the United Nations. Ferrieri became an active feminist and her actions contrasted with other women architects of her time. Anna Castelli Ferrieri (1918-2006) was an Italian pioneering architect. Coming from a family of community members, her father, Enzo Ferrieri,
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