Method for the manufacture of reaction resin molding materials

Details Method for the manufacture of reaction resin molding materials Method for the manufacture of reaction resin molding materials

1984-06-27

1986-01-14

Cockeram, Herbert S.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524402, 524425, 524430, 525119, 525502, 525452, 528 73, 528 48, 528 52, 528 54, 528 55, 528 57, 4284228, 427116, C08K 336, C08G 1858, C08G 1818, C08G 7102

Patent

active

045646511

ABSTRACT:
This invention provides reaction resin molded materials (OX/ICR molded materials) containing oxazolidinone and isocyanurate rings prepared from reaction resin mixtures of polyepoxides and polyisocyanates (EP/IC resins) in the presence of a hardening catalyst and has as an object to provide a simple manufacturing method for heat resistant OX/ICR molded materials with improved mechanical properties. According to this invention, EP/IC resins which are capable of casting and impregnating and which are free from solvents are provided. These resins have a formula mole ratio of EP:IC of about 1 to 5 and a viscosity of up to 7,000 mPa sec at 25.degree. C. and are cross-linked by means of tertiary amine or imidazole hardening catalysts at gelling temperatures of up to 130.degree. C. and post-hardening temperatures of 130.degree. to 200.degree. C. to produce OX/ICR molded materials with a mole ratio OX:ICR greater than 1, wherein the reaction of the epoxy and isocyanate groups is above 90% after the hardening.

REFERENCES:
patent: 3979365 (1976-09-01), Tanaka et al.
patent: 4128531 (1978-12-01), Toyoda et al.
patent: 4130546 (1978-12-01), Goto et al.
patent: 4220731 (1980-09-01), Zuppinger
patent: 4384101 (1983-05-01), Kovacs et al.

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