Low-hardness and high-elasticity water treatment membrane component epoxy pouring sealant preparation method and application

Abstract

The invention discloses a low-hardness and high-elasticity water treatment membrane component epoxy pouring sealant preparation method and application. An epoxy pouring sealant comprises a component Aand a component B, the component A comprises, by weight, 30-70 parts of epoxy resin, 5-20 parts of activated thinners, 10-20 parts of toughening agents, 5-30 parts of fillers and 0.1-3 parts of coupling agents, the component B comprises, by weight, 20-50 parts of polyether amine, 40-70 parts of alicyclic amine and 2-15 parts of curing accelerators, and the weight ration of the component A to thecomponent B is (100:10)-(100:50). By the aid of a 'trinity' toughening modified mode of the flexible toughening agents, the activated toughening thinners and flexible curing agents, the epoxy pouringsealant is characterized of low hardness, high elasticity and stable hardness within wide temperature range, the epoxy pouring sealant has excellent adhesive performance and is low in initial viscosity, high in mold filling speed, simple and convenient to operate and applicable to the fields such as package of water treatment membrane components and flexible package of electronic devices, and theblocking efficiency of the membrane components can be greatly improved.

Description

technical field [0001] The invention relates to an adhesive, in particular to the preparation and application of a low-hardness and high-elasticity epoxy potting glue for water treatment membrane components. Background technique [0002] With the development of society and economy, human beings consume more and more water resources, and problems such as shortage of fresh water resources and water pollution are becoming more and more serious. Membrane water treatment technology is an energy-saving and high-efficiency purification technology. Its process uses a selectively permeable membrane as the separation medium. When there are driving forces such as pressure and concentration differences on both sides of the membrane, its uniform pore size is used to intercept water. Particles, bacteria and other substances to achieve the purpose of separation and purification. Hollow fiber membrane is a kind of separation membrane with high surface area, fibrous shape and self-supportin...

AI Technical Summary

Problems solved by technology

Polyurethane potting glue has good flexibility, can reduce the fracture of the end of the membrane filament, and has the advantages of low viscosity and fast curing speed, but the isocyanate group in the polyurethane potting glue is very easy to react with water, and the cured product Air bubbles reduce sealing, so its use conditions are more severe

Epoxy resin has excellent adhesion, mechanical strength and corrosion resistance, and is cost-effective. However, epoxy resin is brittle and easy to cause broken wires, so toughening modification is required

In related patents in the field, a variety of toughening agents are applied to epoxy resin potting adhesives, such as liquid rubber (patent CN201210256771.8), low-molecular polyurethane or polyol glycidyl ether (CN201410606987.1), rubber / dipolymer Acid / polyurethane-modified epoxy resin (CN201611229888.1, CN201710552507.1), but the hardness of the epoxy resin cured product described in each technical solution is only Shore hardness A70-A80 at the lowest, which does not reach the real flexible packaging

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