Base fabric for air bags and method for the preparation thereof

摘要

Disclosed is a base fabric for automobile air bags having excellent flexibility to ensure compact folding of the air bag and high flame retardancy for safety in hazard, which consists of a woven fabric web and a rubbery coating layer formed thereon from a silicone-based coating composition in the form of an aqueous emulsion comprising: (a) 100 parts by weight of an organopolysiloxane represented by the general formula X-Ä-SiR<1>2-O-Üm-Ä-SiZ2-O-Ün-SiR<1>2-X, in which R<1> is a monovalent hydrocarbon group having 1 to 20 carbon atoms, Z is R<1>, OR<2> or -(-O-SiR<1>2-)k-OR<2>, R<2> being a hydrogen atom or R<1> and k being a positive integer not exceeding 1000, X is R<1> or OR<2>, m is a positive integer of 100 to 10,000 and n is 0 or a positive integer not exceeding 1,000 and which contains at least two OR<2> groups in a molecule; (b) from 0.5 to 50 parts by weight of an organohydrogen polysiloxane having, in a molecule, at least three silicon-bonded hydrogen atoms; (c) from 0.5 to 100 parts by weight of a finely divided silica filler or a powder of an polyorganosilsesquioxane; (d) from 0.1 to 20 parts by weight of an alkoxy silane compound having, in a molecule, at least one amido group and at least one carboxyl group or a partial hydrolysis-condensation product thereof; (e) from 0.1 to 20 parts by weight of an alkoxy silane compound having, in a molecule, at least one epoxy or amino group or a partial hydrolysis-condensation product thereof; and (f) from 0.01 to 10 parts by weight of a curing catalyst for the composition.