Method for manufacturing epoxy resin molded materials

Details Method for manufacturing epoxy resin molded materials Method for manufacturing epoxy resin molded materials

1984-07-20

1986-03-25

Nielsen, Earl

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

Synthetic resins

From carboxylic acid or derivative thereof

528361, C08G 5924, C08G 5942

Patent

active

045784523

ABSTRACT:
This application relates to methods for the manufacture of leakage current-proof epoxy-resin molded materials from epoxy resin mixture based on di- or polycarboxylic-acid glycidyl esters, di- or polyfunctional cycloaliphatic olefinic epoxides and dicarboxylic-acid anhydrides, carried out in such a manner that molded materials with good mechanical properties are obtained also for parts of large volume. For this purpose, the invention provides that, by means of the experimentally determined time necessary to reach the maximum temperature during the cross-linking of the epoxy resin mixture under quasi adiabatic conditions, the rate of cross-linking of the epoxy resin mixture is adjusted, by the addition of a diol or polyol, to at least as long as the time necessary to reach the maximum temperature during cross-linking of the glycidyl ester/dicarboxylic acid anhydride components.

REFERENCES:
patent: 3764584 (1973-10-01), Hope et al.
patent: 3989679 (1976-11-01), Sluis et al.
patent: 4294746 (1981-10-01), Blair et al.
patent: 4336367 (1982-06-01), Morris et al.
patent: 4412047 (1983-10-01), Monnier et al.

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