| 单词 |
polyisocyanate |
| 释义 |
polyisocyanate|ˌpɒlɪaɪsəʊˈsaɪəneɪt|
[f. poly- + isocyanate s.v. iso- b.]
Any organic compound containing two or more isocyanate groups; also applied to polymers prepared from such compounds, esp. polyurethanes.
1943[see polyesteramide]. 1945Chem. & Engin. News 25 Sept. 1615/2 The polyurethanes..are produced by the reaction of polyisocyanates with polyhydroxy compounds such as polyesters. 1958Times Rev. Industry June 37/3 An I.C.I. special product known as Suprasec K is a 50 per cent. solution in ethyl acetate of a newly developed polyisocyanate designed for use in high-quality lacquers for wood, rubber, and other materials. 1959Times 27 Apr. (Rubber Industry Suppl.) p. vi/7 Natural rubber, neoprene and polyisocyanates play the same part in ships as in hotels—for luxury upholstery, non-slipping table covering, fire-resisting foam bedding, floor covering, &c. 1968E. R. Wells in C. R. Martens Technol. Paints, Varnishes & Lacquers xiii. 205 Urethane is now the accepted description for a group of polymers that are sometimes called polyurethanes, isocyanates or polyisocyanates. |
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