Freeze stable allophanate-modified toluene diisocyanate trimers

Details Freeze stable allophanate-modified toluene diisocyanate trimers Freeze stable allophanate-modified toluene diisocyanate trimers

1999-08-16

2000-05-16

Seidleck, James J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 49, 528 67, 528 76, 528 77, 528 83, 528 73, 528 48, 2521822, 25218221, 25218222, 25218223, 25218224, 25218225, C08G 1810

Patent

active

060638915

ABSTRACT:
This invention relates to a novel freeze-stable allophanate modified toluene diisocyanurates, and to a process for producing these freeze-stable allophanate-modified toluene diisocyanurates which requires a catalyst which is capable of forming both trimer and allophanate groups, or a catalyst system comprising at least one catalyst capable of forming trimer groups and at least one catalyst capable of forming allophanate groups. This invention also relates to novel freeze-stable blends of the allophanate-modified toluene diisocyanurates with di- and/or polyisocyanates of the diphenylmethane series; and to freeze-stable urethane prepolymers of the allophanate-modified toluene diisocyanurates, or the blends of these with an isocyanate of the diphenylmethane series.

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