Coating compositions and textile fabrics coated therewith
AssigneeDow Corning Corporation
InventorsGraham Budden, Stephen James
Life of this patent
Estimating the term…
Abstract
An organopolysiloxane composition for coating textile fabrics which is curable to an elastomer comprises at least one organopolysiloxane having silicon-bonded aliphatically unsaturaded hydrocarbon groups, an organosilicon crosslinker having at least 3 silicon-bonded hydrogen atoms, a precious metal catalyst and 15 to 30 parts by weight of a filler per 100 parts of the weight of the total composition. The filler has a Moh hardness no greater than 4.5 and a mean particle size no greater than 3.0 μm.
Claims13
An organopolysiloxane composition for coating textile fabrics, the composition comprising:
- (A) at least one organopolysiloxane having silicon-bonded aliphatically unsaturated hydrocarbon groups, the organopolysiloxane present in greatest amount having only terminal silicon-bonded aliphatically unsaturated hydrocarbon groups per molecule and a viscosity at 25° C. of at least 10 Pa·s;
- (B) an organosilicon crosslinker having at least 3 silicon-bonded hydrogen atoms in an amount which is sufficient to give a molar ratio of Si—H groups in (B) to the total amount of alkenyl groups in (A) of from 1/1 to 10/1;
- (C) a precious metal catalyst in an amount sufficient to promote the reaction of the aliphatically unsaturated hydrocarbon groups of (A) with the Si—H groups of (B);
- (D) 15 to 30 parts by weight of a filler per 100 parts of the weight of the total composition,
- characterised in that the filler has a Moh hardness no greater than 4.5 and a mean particle size no greater than 3 μm.
An airbag comprising a textile fabric coated with a 25 to 180 g/m2 layer of an organopolysiloxane composition comprising one or more organopolysiloxanes (A) having either two or more reactive groups selected from aliphatically unsaturated hydrocarbon or hydrocarbonoxy substituents and hydroxyl or hydrolysable groups, an organosilicon crosslinker (B) adapted to cross link organopolysiloxane (A) by reaction with the reactive groups, a sufficient amount of catalyst (C) able to promote the reaction between components (A) and (B), and 15 to 30 weight % of a filler (D), characterised in that the filler (D) has a Moh hardness no greater than 4.5 and a mean particle size no greater than 3.0 μm.
Use of an organopolysiloxane composition comprising one or more organopolysiloxanes (A) having either two or more reactive groups selected from aliphatically unsaturated hydrocarbon or hydrocarbonoxy substituents and hydroxyl or hydrolysable groups, an organosilicon crosslinker (B) adapted to cross link organopolysiloxane (A) by reaction with the reactive groups, a sufficient amount of catalyst (C) able to promote the reaction between components (A) and (B), and 15 to 30 weight % of a filler (D) to coat a textile fabric in the formation of an airbag, characterised in that the filler (D) has a Moh hardness no greater than 4.5 and a mean particle size no greater than 3.0 μm.
Dependencies are inferred from the claim text.