Hot applied plastisol compositions
AssigneeAster Co., Ltd.
InventorsMichael J. Gerace, Janet M. Gerace
Life of this patent
Estimating the term…
Abstract
Thermally stable hot applied plastisol compositions are especially useful in the assembly of metal parts. The compositions have adhesive and sealant qualities which allow them to be used in automotive assembly plants. Compositions of the invention comprise as major ingredients finely divided polyvinyl chloride resin, plasticizer, thermoplastic polymeric resin which is solid at room temperature but softens to a flowable state at application temperature, and an adhesion promotion system. Optionally a filler, wax, heat stabilizer, pigment, wetting agent, or mixtures thereof may be added. The individual components work synergistically to get good application properties, metal adhesion, wash-out resistance, and paintability.
Claims13
A hot applied thermally stable plastisol composition having adhesive and sealant qualities useful in the assembly of automobile bodies said composition comprising:
- (a) from about 20% to about 35% by weight of a finely divided polyvinyl chloride resin which is capable of being dispersed in a plasticizer;
- (b) from about 15% to about 35% by weight of a plasticizer;
- (c) from about 2% to about 25% by weight of a thermoplastic polymeric resin which is solid at room temperature and flowable at a temperature of application and which is selected from the group consisting of polyethylene, polyamides, polyvinyl butyrals, polyvinyl acetate, cellulose derivatives, polyesters, polymethyl methacrylates and ethacrylates, polyvinyl ethers, polyurethanes, ethylene vinyl acetate, vinyl acetate ethylene, vinyl acetate, acrylonitrile, acrylonitrile butadiene copolymer, chlorinated ethylene vinyl acetate, poly epsilon caprolactone, methyl methacrylate, polybutylene terephthalate and mixtures thereof;
- and
- (d) from about 3% to about 15% of an adhesion promotion system.
The composition of 4 wherein said adhesion promotion system further includes an epoxy or modified epoxy resin and a hardening agent for said epoxy or modified epoxy resin.
Dependencies are inferred from the claim text.