Production of non-stick coatings

US4202929A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Armand de Montigny · Leverkusen, DE
• Hans Toepsch · Leverkusen, DE
• Werner Buchner · Leverkusen, DE

Key dates

• Filing date: Oct 6, 1978
• Grant date: May 13, 1980
• Expiry date: Oct 6, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In the production of non-adherent coated paper substrate by applying to the substrate a solvent-containing mixture comprising (A) an .alpha.,.omega.-polyorganosiloxanediol, (B) an organosiloxane containing Si-H groups, (C) an alkyl- or alkenyl-triacetoxysiloxane, (D) an organic isocyanate with more than two isocyanate radicals and (E) a hardening catalyst, and then heating the substrate to harden the coating, the improvement which comprises including in the mixture applied to the substrate a reaction product (F) of a chloromethylpolymethylsiloxane of the formula EQU ClCH.sub.2 (CH.sub.3).sub.2 Si[OSi(CH.sub.3)CH.sub.2 Cl].sub.n OSi(CH.sub.3).sub.2 Cl wherein n is from 2 - about 200, with at most an equivalent molar amount of a primary alkyl, alkenyl or cycloalkyl amine with about 4-18 carbon atoms, e.g. butylamine, hexylamine, cyclohexylamine, 2-ethylhexylamine and allylamine. The coating hardens in a very short time in a drying oven but at normal temperatures the mass has a relatively long pot life.