Process for the purification of polyisocyanates, the polyisocyan

Details Process for the purification of polyisocyanates, the polyisocyan Process for the purification of polyisocyanates, the polyisocyan

1992-07-17

1995-01-31

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

560359, 521154, 521160, 528 67, 203 73, C07C26318

Patent

active

053860543

ABSTRACT:
A process for the purification of organic polyisocyanates by mixing of the polyisocyanate with from 0.001 to 1% by weight of compounds containing trimethylsilyl groups at temperatures of from 20.degree. to 150.degree. C. The resultant mixture of organic polyisocyanates and compounds containing trimethylsilyl groups is optionally treated by degasification or distillation. These purified polyisocyanates are suitable for the production of polyurethane plastics, and in particular, polyurethane foams.

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patent: 5136087 (1992-08-01), Van Horn et al.
Patent Abstracts of Japan, vol. 6, No. 165 (C-121)(1043), Aug. 28, 1982 JP-A-57 082 358, May 22, 1982.
Chem. Abstracts, vol. 114, No. 14, Apr. 8, 1991, Abstract No. 124644E & JP-A-2 140 277, May 29, 1990.
Chem. Soc. Rev. 3 (1974), pp. 209 to 230.

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