Process for the preparation of polyisocyanate

Details Process for the preparation of polyisocyanate Process for the preparation of polyisocyanate

1989-07-21

1991-12-03

Richter, Johann

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...

528 49, 544186, 544221, 544222, C08L 7500, C08G 1808, C07D48712, C07D25132

Patent

active

050701371

ABSTRACT:
Disclosed is a process for preparing isocyanurate-type polyisocyanates characterized by reacting an aliphatic or alicyclic diisocyanate compound comprising hexamethylene diisocyanate as a major component in the presence of an isocyanuration catalyst represented by general formula [I], ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent a hydrocarbon group containing 1 to 20 carbon atoms, or a hydrocarbon group containing one or more hetero atoms; at least two of R.sup.1, R.sup.2 and R.sup.3 may be linked to each other; R.sup.4 indicates a hydrogen atom or a hydrocarbon group containing 1 to 20 carbon atoms; and R.sup.5, R.sup.6 and R.sup.7 independently represent a hydrocarbon group containing 1 to 20 carbon atoms. Diol-modified isocyanurate-type polyisocyanates can be prepared additionally using a hydrocarbon diol in the process.

REFERENCES:
patent: 4582888 (1986-04-01), Kase et al.
patent: 4789705 (1988-12-01), Kase et al.

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