Thermosetting reactive resin mixtures and a process for the production of moldings using these mixtures
AssigneeBayer Aktiengesellschaft
InventorsHanns P. Muller, Dimitrios Kerimis, Heinrich Heine, Walter Uerdingen
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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.
Claims9
A thermosetting reactive resin mixture comprising:
- (a) at least one organic polyisocyanate
- (b) at least one organic compound having at least two epoxide groups and
- (c) at least one heat activatable catalyst which is a tertiary or quaternary ammonium salt of an alkylating or acidic ester of organic phosphonic acid or phosphoric acid in quantities such that the equivalent ratio of isocyanate groups to epoxide groups is from 1.2:1 to 70:1.
Dependencies are inferred from the claim text.