Process for the standardization and stabilization of organic pol

Details Process for the standardization and stabilization of organic pol Process for the standardization and stabilization of organic pol

1993-05-20

1994-08-30

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

124730, 528 66, 528 73, 528 87, 528100, 521121, 521122, 521156, 521161, C08K 554, C08K 556, C08J 300

Patent

active

053428811

ABSTRACT:
A new process for the standardization and stabilization with simultaneous increase of reactivity of organic polyisocyanates and the polyisocyanates produced by this process. A polyisocyanate is mixed with compounds having at least one epoxide group which are represented by a specified formula. This mixture is then stabilized with a silylating agent and/or alkylating agent represented by specified formula. The polyisocyanate/epoxide mixture may optionally be heated before the stabilizing agents are added. These polyisocyanates are useful in the production of polyisocyanate addition products.

REFERENCES:
patent: 4014935 (1977-03-01), Ibbotson
patent: 5021536 (1991-06-01), Muller et al.
patent: 5173559 (1992-12-01), Muller et al.
Chem. Soc. Rev. 3 (1974), p. 209 ff.

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