| 摘要 |
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 ClCH2(CH3)2Si[OSi(CH3)CH2Cl]nOSi(CH3)2Cl 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.
|
