Bayer Aktiengesellschaft

Bayeraktiengesellschaft

Hans Toepsch

Armand De Montigny

Heinrich Alberts

Hans-Heinrich Moretto

Reinhard Schliebs

Kurt-Wilhelm Eichenhofer

Hans Friemann

Werner Buchner

Armand deMontigny

In a sheet coated on both surfaces with non-stick coatings, one of the coatings being more non-stick than the other, the improvement which comprises employing as the lesser non-stick coating a composition according to claim 1 by weight consisting essentially of

Coating agent for non-stick coatings

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

Production of non-stick coatings

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

A composition for coating paper, films and fiber materials, comprising

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Leverkusen, Germany

Hans Toepsch