Research on the adhesive application of organic silicon coupling reagent in water-based acrylate sealant
Water-based acrylate sealant was prepared with acrylate emulsion as polymer and silicone coupling agent as viscosifier,and its bonding and aging resistance were studied.The results show that:Compared with ordinary silane coupling agents(KH550,KH560,KH570),the composite silane coupling agent(WETLINK78 and PN-630)makes the water-based acrylic sealant have stronger bonding strength to glass,aluminum and stainless steel,reaching 1.58,1.25 and 1.38 MPa,respectively.The bonding failure is all cohesive failure.The compound silane coupling agent also makes the water-based acrylic sealant have more excellent storage stability,the silicon hydroxyl group is not easy to hydrolysis and condensation in the aging experiment,and still has good bonding properties after thermal aging.
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