Bakelite


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Bakelite

(bā`kəlīt) [for its inventor, L. H. BaekelandBaekeland, Leo Hendrik
, 1863–1944, American chemist, b. Belgium, grad. Univ. of Ghent, 1882. In 1889 he emigrated to the United States. He founded (1893) and conducted, until 1899, when he sold the rights to Eastman, a company for producing a photographic paper of his own
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], synthetic thermosetting resinresin,
any of a class of amorphous solids or semisolids. Resins are found in nature and are chiefly of vegetable origin. They are typically light yellow to dark brown in color; tasteless; odorless or faintly aromatic; translucent or transparent; brittle, fracturing like glass;
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. It has been widely used both alone, to form whole objects, and in combination with other materials, as a laminate or a surface coating. It was used as a substitute for hard rubber, amber, or celluloid; for insulating electrical apparatus (since it is a nonconductor); and for the manufacture of certain machinery gears, phonograph records, and many other articles useful and ornamental and as diverse in character as buttons, billiard balls, pipestems, and umbrella handles. Bakelite is a condensation polymerpolymer
, chemical compound with high molecular weight consisting of a number of structural units linked together by covalent bonds (see chemical bond). The simple molecules that may become structural units are themselves called monomers; two monomers combine to form a dimer,
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 of formaldehydeformaldehyde
, HCHO, the simplest aldehyde. It melts at −92°C;, boils at −21°C;, and is soluble in water, alcohol, and ether; at STP, it is a flammable, poisonous, colorless gas with a suffocating odor.
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 and phenolphenol
, C6H5OH, a colorless, crystalline solid that melts at about 41°C;, boils at 182°C;, and is soluble in ethanol and ether and somewhat soluble in water. An aromatic alcohol, it exhibits weak acidic properties and is corrosive and poisonous.
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. In practice, the phenol and formaldehyde are first polymerized to a small extent by using the proper choice of catalyst and temperature. The resulting prepolymer, called a resol, is a low-melting, soluble material, which can then be combined with a filler (usually cotton linters or wood fibers) and a pigment and heated under pressure in a mold to yield an object of the desired shape. The pure resin is colorless or amber-colored and very brittle; the various fillers and other additives give it the desired properties depending on its application. Heating of the prepolymer results in extensive cross-links between the polymer chains, resulting in a tightly bound three-dimensional network. A Bakelite-type resin can also be formed using furfuralfurfural
or furfuraldehyde
[Lat.,=bran], C4H3OCHO, viscous, colorless liquid that has a pleasant aromatic odor; upon exposure to air it turns dark brown or black. It boils at about 160°C;.
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 in place of the formaldehyde.

Bakelite

™ any one of a class of thermosetting resins used as electric insulators and for making plastic ware, telephone receivers, etc
References in periodicals archive ?
a large Bakelite contraption at the bottom of the stairs
Aside from "One Candle" (which is about to go on a museum tour), "TV Buddha" and the "Bakelite Robot," also to be featured are Paik's works on canvas, entire video cameras and radio-televisions that combine graffiti elements as well as smiling television sets with instantly recognizable color bars.
Old Bakelite phones <Btransformed into lights make a design statement and are simply good fun and real talking points
A Joseph Lorenzl jazz-age patinated bronze figure, above; and a red Bakelite phone, right
Bakelite was invented and patented in 1907 by the chemist Leo Baekeland, who also called it phenol-formaldehyde polymer (PF) or phenolic resin.
BANKING AND CREDIT NEWS-15 April 2010-JCR maintains Sumitomo Bakelite's A+ debt rating, outlook "stable"(C)1994-2010 M2 COMMUNICATIONS http://www.m2.com
Other landmarks named through the program have been the invention of Bakelite, the discovery of penicillin and the development of Tide laundry detergent.
By the 1920s and 1930s, costume jewellery was utilising new materials such as the early plastics Bakelite, Celluloid and Galalith.
HCT created a modern, sophisticated, Bakelite travel atomizer, so fans of cult Parisian brand Diptique can carry their favorite fragrance on the go.
Torrential rain and extensive flooding greeted the Plastics Historical Society's centenary celebrations of Bakelite in Stratford-on-Avon, UK.
QUIZ CHALLENGE: 1 A grace and favour residence; 2 Bakelite; 3 Gwyneth Paltrow; 4 Come On; 5 Dogs.