Preparation of stable dispersions of finely divided polyisocyana

Details Preparation of stable dispersions of finely divided polyisocyana Preparation of stable dispersions of finely divided polyisocyana

1987-10-23

1989-12-19

Anderson, Harold D.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

524 44, 524 49, 524 52, 524 68, C09K 300, H05B 3300

Patent

active

048881244

ABSTRACT:
A process for the preparation of stable dispersions of finely divided polyisocyanates, and the preparation of heat-crosslinkable isocyanate systems.
Stable dispersions of finely divided polyisocyanates in a liquid which may or may not contain surfactants, protective colloids and other assistants are obtained by a method in which polyisocyanates are treated with a stabilizer in the presence of absence of the liquid, and the dispersions prepared from these are finely dispersed and/or milled under the action of high shear forces, if necessary with the addition of further stabilizer.
These dispersions are useful as crosslinking agents, particularly for the preparation of heat-cross-linkable isocyanate systems.

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