Adherent powder coatings on a basis of PVC copolymers
AssigneeDynamit Nobel Aktiengesellschaft
InventorsPeter Gebauer, Peter Unrath
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Abstract
Adherence of polyvinylchloride coatings to substrates such as metal, glass, and ceramics is improved by using as the coating composition a copolymer of polyvinylchloride admixed with monoalkyl-monyaryl, dialkyl, or diaryl tin bismercaptocarboxylic acid ester of polyvalent alcohol. The composition adheres directly to the substrate.
Claims25
Process of producing an article coated with a vinyl chloride polymer which comprises depositing a powder directly on the surface of a substrate which is a body portion of the article, and which is free of adhesivizing agent and forming a coating film of the surface of the substrate by melting the powder thereon, and hardening the film to form said coated article, said powder being a composition comprising a copolymer of vinyl chloride admixed with monoalkylmonaryl, dialkyl, or diaryl tin bismercaptocarboxylic acid ester of polyvalent alcohol in an amount sufficient to improve adhesion of the copolymer to the substrate and provide a self-adherent coating, said composition being free of plasticizer.
Dependencies are inferred from the claim text.