Reactive plastisol dispersion

Details Reactive plastisol dispersion Reactive plastisol dispersion

C - Chemistry, Metallurgy

08

F

400/4008, 400/59

C08F 283/10 (2006.01) C08F 261/12 (2006.01) C09J 3/14 (1985.01)

Patent

CA 1260647

REACTIVE PLASTISOL DISPERSION Abstract of the Disclosure This invention relates to a reactive plastisol dispersion composition comprising (1) at least one polyvinyl acetal thermoplast in powder form, which is insoluble in the plasticizer at room temperature and plasticizable at a temperature at or above fluxing temperature, and which thermoplast has a flow temperature at 1,000 psi of between 100° and 200°C; (2) a liquid plasticizer comprising an epoxide resin having on average more than one epoxide group in the molecule or a mixture of said epoxide resins in combination with a member of the group consisting of (a) at least one ethylenically unsaturated monomer, oligomer or prepolymer of the formula: Image wherein R is H or CH3, R1 is an organic moiety and n is 1 or more, (b) at least one unsaturated polyester containing the group: Image wherein R2 and R3 are organic moieties, x is 0-20 and y is 1-20, and (c) a mixture of (a) and (b); (3) an effective amount of a latent curing agent for said epoxide resin, which is inactive in the - 1 - epoxide resin at room temperature and which is selected from the group consisting of dicyandiamide, melamine, guanamine, polycarboxylic acid polyhydrazides, carboxylic acid imides, imidazole derivatives, BF3 adducts and diaryliodonium salts; and, optionally, (4) a curing agent for the plasticizer group member comprising a free radical thermal initiator. The plastisol dispersion after fluxing can form a thermoset sealant, coating or adhesive on exposure to heat. - 2 -

451056

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