A kind of preparation method and application of the copolymer of epoxy resin and unsaturated resin

Abstract

The invention discloses a preparation method of co-polymer of epoxy resin and unsaturated resin. The preparation method comprises steps as follows: isophthalic unsaturated polyester resin and bisphenol-A anticorrosion unsaturated polyester resin are mixed in a mass ratio of 1:1, bisphenol-A epoxy resin accounting for 10-60% of the total mass of isophthalic unsaturated polyester resin and bisphenol-A anticorrosion unsaturated polyester resin is added, simultaneously, an initiator accounting for 2% of the total mass of isophthalic unsaturated polyester resin and bisphenol-A anticorrosion unsaturated polyester resin and an accelerant accounting for 2% of the total mass of isophthalic unsaturated polyester resin and bisphenol-A anticorrosion unsaturated polyester resin are added, a filler accounting for 50% of the total mass of isophthalic unsaturated polyester resin and bisphenol-A anticorrosion unsaturated polyester resin is added, and the mixture is cured, aged and then cured to obtain the co-polymer of epoxy resin and unsaturated resin. According to the preparation method and the application, laboratory requirements can be completely met, the cost can be effectively reduced, and the production efficiency is improved obviously.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a preparation method and application of a copolymer of epoxy resin and unsaturated resin. Background technique [0002] Epoxy resin countertops have been widely used since the use of epoxy resin boards as laboratory countertops in the 1960s. At present, more than 70% of laboratories in the world use epoxy resin boards as laboratory countertops, fume cabinet countertop sinks, etc. [0003] Performance characteristics of epoxy resin and its cured products: [0004] High mechanical properties. Epoxy resin has strong cohesion and dense molecular structure, so its mechanical properties are higher than those of general-purpose thermosetting resins such as phenolic resin and unsaturated polyester. [0005] Strong adhesion. The epoxy resin curing system contains highly active epoxy groups, hydroxyl groups, and polar groups such as ether bonds, amine bo...

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Problems solved by technology

[0014] Large shrinkage rate during curing, short storage period, contains styrene, has a pungent smell, and long-term exposure is not good for health

[0015] The heat resistance is poor. The heat distortion temperature of most unsaturated polyester resins is 50-60°C, and some resins with good heat resistance can only reach 120°C.

[0016] Poor mechanical properties, easy to deform, thermal expansion and contraction of the finished product

[0017] Poor chemical resistance

Unsaturated polyester resin has better resistance to water, vinyl acid and dilute alkali, but poor resistance to strong acid, strong alkali and organic solvent, which cannot fully meet the requirements of laboratory tabletops.

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