Storage stable compositions based on polyvinyl chloride plastisols and stabilized isocyanates

US4623686A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Helmut Hurnik · Leverkusen, DE
• Gerhard Grogler · Leverkusen, DE
• Heinrich Hess · Cologne, DE
• Richard Kopp · Cologne, DE

Key dates

• Filing date: Jan 24, 1985
• Grant date: Nov 18, 1986
• Expiry date: Jan 24, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to novel compositions for coating purposes comprising PA0 (A) polyvinyl plastisols, PA0 (B) surface modified, finely divided, stabilized polyisocyanates with retarded reactivity, in which 0.1 to 25 equivalents-% of the isocyanate groups of the unstabilized polyisocyanate have been deactivated on the surface, preferably by a reaction with polyamines, hydrazine, alkylhydrazines, polyhydrazide compounds and/or selected amidine and/or guanidine compounds; and PA0 (C) plasticizers and/or lightly branched, relatively high molecular weight polyhydroxyl compounds having melting points below 60.degree. C. and compatible with PVC plastisol. The invention also relates to the use of these storage stable but heat curable mixtures as primers for PVC coatings on plastics, foils, textile sheet products or filaments and as primer coats for flocking.