Thermosetting reactive resin mixtures and a process for the prod

Details Thermosetting reactive resin mixtures and a process for the prod Thermosetting reactive resin mixtures and a process for the prod

1987-01-07

1988-03-01

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521108, 525456, 528 51, C08G 1814

Patent

active

047286768

ABSTRACT:
A thermosetting reactive resin mixture is made from an organic polyisocyanate, a polyepoxide and a heat activatable catalyst. The catalyst is a tertiary or quaternary ammonium salt of an alkylating or acidic ester of an organic phosphonic acid or of phosphoric acid. The polyisocyanate and polyepoxide are used in quantities such that the equivalent ratio of isocyanate groups to epoxide groups is from 1.2:1 to 70:1. These mixtures may be heated to produce plastics having excellent heat resistance, moisture and abrasion resistance, low dielectric losses and excellent molding properties.

REFERENCES:
patent: 4070416 (1978-01-01), Narahara et al.
patent: 4521545 (1985-06-01), Kerimis et al.
patent: 4562227 (1985-12-01), Rogler et al.
patent: 4564651 (1986-01-01), Markert et al.
patent: 4582723 (1986-04-01), Markert et al.

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