Production of non-stick coatings

US4251596A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Oct 6, 1978
• Grant date: Feb 17, 1981
• 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) 100 parts by weight of an .alpha.,.omega.-dihydroxypolydimethylsiloxane having a viscosity between 10.sup.5 and 5. 10.sup.7 cP at 20.degree. C., (B) about 1 to 20 parts by weight of a polyorganosiloxane which is terminally blocked with trimethylsiloxy groups, contains Si-bonded hydrogen and has about 10 to 40 CH.sub.3 Si(H)O units, and (C) about 1 to 20 parts by weight of a heavy metal carboxylate or dialkyl-tin carboxylate, and then heating the substrate to harden the coating, the improvement which comprises including in the mixture applied to the substrate (D) about 0.5 to 10 parts by weight of disilamorpholinesiloxane which is obtained by reacting a chloromethylpolymethylsiloxane of the formula EQU ClCH.sub.2 (CH.sub.3)SiO[Si(CH.sub.3)CH.sub.2 ClO].sub.n Si(CH.sub.3).sub.2 CH.sub.2 Cl in which n denotes a value between 2 and 200, with at most an equivalent amount of a primary C.sub.4-18 alkyl or alkenyl or cycloalkylamine, e.g. butylamine, hexylamine, cyclohexylamine, 2-ethylhexylamine and allylamine. The coating hardens in a very short time in a dryi…