Blocked polyisocyanates and a process for their preparation

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...

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528 71, 528 73, 528 80, 528 83, C08G 1881, C08G 1828

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active

056210639

ABSTRACT:
(Cyclo)aliphatic polyisocyanates are provided which are completely or partially blocked with malonic esters, the malonic ester containing at least one tert-butyl group. The blocked polyisocyanates may be deblocked at a reduced temperature.

REFERENCES:
patent: 3882509 (1975-05-01), Newton et al.
patent: 4007215 (1977-02-01), Hartmann et al.
patent: 4098933 (1978-07-01), Burkhardt et al.

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