Fast cured moist-heat aging resistant double-component sealing adhesive and preparation process thereof

Abstract

The invention discloses a fast cured moist-heat aging resistant double-component sealing adhesive consisting of components A and B and a preparation process thereof. The component A comprises silane-containing blocking prepolymer, plasticizer, thixotropic agent, ultraviolet absorbent, ultraviolet stabilizer, moisture scavenging agent which is easily hydrolyzed silane coupling agent or oxazolidine moisture scavenging agent, accelerant, curing agent, colorant, incremental filler which is superfine calcium carbonate, superfine talcpowder, surface treated calcium carbonate or silicon micro powder, and reinforcing filler; and the component B comprises silane-containing blocking prepolymer, plasticizer, thixotropic agent, cocatalyst, surfactant and water absorbent material. The weight ratio range of the component A and the component B of the double-component system is relatively wide, and certain mixing error and metering error are allowed during mixing. Moreover, the mixing quantity of the component B is relatively low, the performance of the component B is furthest kept equivalent to that when the component B and the component A are separately cured, and the adhesive influence is reduced to minimum.

Description

technical field

[0001] The invention relates to a two-component sealing adhesive, in particular to a two-component sealing adhesive with fast curing and high strength and anti-humidity and aging performance.

[0002] Background technique

[0003] The sealing adhesive containing silane-terminated prepolymer is widely used in civil construction, transportation, automobile, electronic appliances, machinery, chemical industry, light industry and other fields. It is mainly used in the bonding between metal and metal, metal and non-metal Bonding and sealing. Usually people choose single-component sealing adhesive because it is convenient to use, has good flexibility, has low requirements for sizing equipment, and there will be no mixing error and metering error when using it. However, since the vulcanization of the one-component type product is carried out gradually from the surface layer to the inner layer, its curing mechanism belongs to the moisture curing type, so the curing...

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