Adhesive for carrying out heat vulcanization adhesion on EPDM (Ethylene-Propylene-Diene Monomer) and metal

Abstract

The invention relates to an adhesive for carrying out heat vulcanization adhesion on EPDM (Ethylene-Propylene-Diene Monomer) and metal. The adhesive is prepared from the following components in parts by weight: 100 parts of chlorosulfonated polyethylene rubber CSM, 50 to 70 parts of p-dinitrosobenzene, 50 to 70 parts of polyisocyanate PK preparation which is subjected to end sealing by a silane coupling agent KH 550, 30 to 40 parts of packing and 960 to 1080 parts of mixed solvent, wherein the mixed solvent is a blend solvent of tetrachloroethylene and xylene, and the mass ratio of the tetrachloroethylene and the xylene is 1:1. The adhesive for carrying out the heat vulcanization adhesion on the EPDM and the metal, provided by the invention, is stable in storage performance and simple in using technology and has a single-coating system; the adhesive has higher adhesion strength on adhesion of the EPDM of a peroxide vulcanization system and a sulfur vulcanization system and the metal, the adhesion strength after vulcanization is greater than or equal to 3 MPa, and the peeling strength is greater than or equal to 10 KN / m under 180 DEG C.

Description

Technical field: [0001] The invention relates to an adhesive for thermal vulcanization of EPDM rubber and metal. The adhesive is a single-coating system, which can realize EPDM rubber and metal adhesion under high-temperature vulcanization conditions without applying primer on the metal surface. combine. Background technique: [0002] EPDM has outstanding ozone resistance, weather resistance, water resistance, steam resistance, chemical resistance and excellent electrical insulation properties, coupled with its low density and wide temperature range, so it plays an important role in the rubber product industry. status. Commonly used ethylene propylene diene monomer (EPDM) is divided into peroxide vulcanization system and sulfur vulcanization system. Compared with EPDM of sulfur vulcanization system, EPDM of peroxide vulcanization system has better temperature resistance and smaller compression deformation, but Lower tear strength. Due to the relationship between modulus, ...

AI Technical Summary

Problems solved by technology

Commonly used ethylene propylene diene monomer (EPDM) is divided into peroxide vulcanization system and sulfur vulcanization system. Compared with EPDM of sulfur vulcanization system, EPDM of peroxide vulcanization system has better temperature resistance and smaller compression deformation, but lower tear strength

Due to the relationship between modulus, in many occasions, it must be firmly bonded to the metal skeleton material to play a greater role, but the main chain of EPDM is a saturated structure without double bonds, and only contains a small amount of double bonds on the side chain. , is a weakly polar inert material with poor self-adhesive and mutual-adhesive properties, which restricts its popularization and application

[0003] At present, in some occasions that do not require high bonding strength, Lechner glue is used for bonding. The main adhesive component in Lechner glue is triphenylmethane triisocyanate, which is easy to decompose and deteriorate when encountering moisture in the air. , leading to instability of the bonding effect, and the solvent chlorobenzene solution of Lechner glue has certain toxicity

In some occasions with high bonding requirements, a double-coated adhesive system is used, that is, a layer of primer needs to be coated on the metal surface before drying, and then the adhesive is applied. The use process is relatively complicated.

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