Epoxy resin premix and preparation technology of the epoxy resin premix

Abstract

The invention discloses an epoxy resin premix which is characterized by containing epoxy resin mixture and curing agent mixture, wherein the epoxy resin mixture includes epoxy resin, color paste, aluminum hydroxide filler and epoxy resin efficient fire retardant and the curing agent mixture includes methyl tetrahydrophthalic anhydride, accelerator and aluminum hydroxide filler. Aiming at solving the problems that in the prior art, epoxy resin is utilized for pouring a dry type transformer, various harmful substances are probably generated and the practical production and application can not be met, the invention provides the epoxy resin premix and a preparation technology of the epoxy resin premix, wherein the epoxy resin premix has low viscosity, a long service cycle, convenience for pouring, small curing shrinkage, property of being not apt to crack, good heat conductivity, good resistance to abrasion, corrosion and heat, high mechanical strength and preferable electrical property. The epoxy resin premix can be used for pouring dry type transformers, current transformers, voltage transformers, insulators, cushion blocks and the like.

Description

technical field [0001] The invention relates to a pouring material, in particular to an epoxy resin premix and its preparation process. Background technique [0002] At present, epoxy resin casting dry-type transformers must pass three performance tests, namely, climate, environment, and combustion tests, before they can obtain a product export license, which is the so-called kaima test. It is very difficult to pass these three tests, especially the combustion test. Harmful substances such as hydrogen chloride, hydrogen cyanide, hydrogen bromide, hydrogen fluoride, sulfur dioxide and formaldehyde are not allowed to be produced during combustion. Therefore, the premix that needs to be prepared is completely different from the usual premix and must be flame retardant. The epoxy resin, curing agent and flame retardant used have special requirements. The usual premix does not contain flame retardant agent. Contents of the invention [0003] In order to solve the problem in t...

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Problems solved by technology

[0003] In order to solve the problem in the prior art that using epoxy resin to cast dry-type transformers will produce more harmful substances and cannot meet the actual production and use problems, the present invention provides a transformer with low viscosity, long service life, easy casting, and small curing shrinkage. , not easy to crack, good thermal conductivity, good wear resistance, good corrosion resistance, good heat resistance, high mechanical strength and good electrical performance epoxy resin premix and its preparation process