Method for the manufacture of molded materials

Details Method for the manufacture of molded materials Method for the manufacture of molded materials

1986-01-22

1986-12-23

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523466, 525528, 528 53, C08L 6300, C08K 334, C08K 326, C08K 322

Patent

active

046313060

ABSTRACT:
This invention relates to a method for the manufacture of molded material for an insulating component made of a quick-hardening reaction resin which employs a hardening catalyst. An object of the invention is to provide reaction resins which allow the manufacture of molded materials with increased dimensional heat resistance and at the same time, good mechanical properties. According to the invention, a reaction resin mixture of a polyepoxide and a polyisocyanate (EP/IC resin) with a formula mole ratio EP:IC of about 1 to 5 and a viscosity of up to about 7000 mPa.multidot.sec (at 25.degree. C.) is cross-linked under pressure by means of a tertiary amine or imidazole hardening catalyst at a gelling temperature of about 130.degree. to 150.degree. C. and is post-hardened at a temperature of 150.degree. to 200.degree. C. This produces a reaction resin molded material (OX/ICR molding material) containing oxazolidinone and isocyanurate rings with a mole ratio OX:ICR greater than 1 and, after hardening, the reaction of the epoxy and isocyanate groups of the EP/IC resin, is above about 90%.

REFERENCES:
patent: 3494888 (1970-02-01), McElroy
patent: 4070416 (1978-01-01), Narahara et al.
patent: 4129554 (1978-12-01), Karasawa et al.
patent: 4143009 (1979-03-01), Dewey

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