Process for coating substrates with polyisocyanates and polyhydroxy polyacrylates

US4442145A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Joachim Probst · Leverkusen, DE
• Bernd Riberi · Odenthal, DE
• Gunter Kolb · Leverkusen, DE
• Peter Hohlein · Kempen, DE

Key dates

• Filing date: Jun 28, 1982
• Grant date: Apr 10, 1984
• Expiry date: Jun 28, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/6229
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of coatings using a coating composition containing as binder optionally blocked lacquer-grade polyisocyanates in combination with polyhydroxy polyacrylate resins based on copolymers of certain hydroxy alkyl(meth)acrylates, methyl methacrylate, 2-ethylhexyl acrylate and, optionally, (meth)acrylic acid, wherein the molecular weight is in the range from about 30,000 to 80,000, the content of low molecular weight constituents having molecular weights of at most about 3000 amounts to between 3 and 15% by weight, the molecular heterogeneity factor amounts to between about 1.0 and 10.0, and the parameter for the chemical heterogeneity of the copolymer is between 0 and about 0.06.