Unsaturated polyester resin composition thickened by non-alkali metal system and bulk molding compound thereof

Abstract

An unsaturated polyester resin composition thickened by a non-alkali metal system and a bulk molding compound thereof, which mainly solve the problem that the solid-liquid phase separation easily occurs when the molding compound flows under heat and pressure. The main body of the composition is the compounding of various unsaturated polyester resins, which is characterized by the introduction of modified unsaturated polyester resins. The special function of the modified unsaturated polyester resin and the optimal particle size and proportion of the inorganic filler effectively improve the stability of the molding compound. Since the traditional alkali metal system is not used for thickening, no additional pre-mixing is required. Viscosity control processes such as post-curing do not need to add expensive viscosity reducers and sizing agents, which can save energy consumption of production equipment. The bulk molding compound involved in the present invention can adopt three molding processes of molding, transfer and injection, and the molded product has better thin-wall appearance and mechanical strength than the equivalent product thickened by alkali metal system.

Description

technical field [0001] The invention relates to the technical field of thermosetting glass fiber reinforced composite materials in polymer materials, in particular to an unsaturated polyester resin composition thickened by a non-alkali metal system and a mass molding compound thereof. Background technique [0002] With the rapid development of technology in the domestic electrical industry, the shortcomings of traditional materials such as bakelite and ceramics, which were widely used in circuit breaker casings in the past, are increasingly emerging. Increased product requirements; the latter, although chemically stable, has difficult problems such as being hard, brittle, and easily broken. Therefore, both are gradually replaced by a new generation of thermosetting plastics - bulk molding compound, which is a prepreg mainly composed of unsaturated polyester resin, fillers and chopped glass fibers and various additives. material. [0003] However, in order to ensure that th...

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Problems solved by technology

[0010] The object of the present invention is to provide a non-alkali metal system thickened unsaturated polyester composition, bulk molding compound and its Preparation

At the same time, it also solves a series of problems such as high production management costs, long production cycles, and complicated quality control caused by the thickening of traditional bulk molding compounds with alkali metal systems.

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