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Silicone rubber composition for coating of woven fabric, and coated woven fabric

A silicone rubber composition, a silicone rubber coating technology, applied in the directions of fabrics, textiles, textiles, and papermaking, etc., can solve the problems of not teaching fabric coating compositions and the like

Active Publication Date: 2009-08-05
DOW CORNING TORAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these compositions do not adequately meet the above requirements, and the last two patent publications do not teach compositions for coating fabrics with an elongation exceeding 600%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] The present invention is further described with reference to Examples, wherein all parts are parts by mass and all viscosities are measured at 25°C. In the examples, Me represents methyl and Vi represents vinyl.

[0049] [Measurement method of physical properties of silicone rubber]

[0050] A cured silicone rubber sample with a thickness of 2 mm was prepared by pressure-curing the silicone rubber composition at 150° C. under a pressure of 20 MPa for 5 minutes. The hardness of the silicone rubber is measured using a type A durometer according to JIS K6253. Tensile strength, elongation, and tear strength are measured in accordance with JIS K6251 and JIS K6252. In addition, the stress generated at 100% elongation was measured as 100% modulus according to JIS K6251.

[0051] [Measurement method of bond strength]

[0052] A nylon 66 fabric with a warp density of 46 threads / inch and a weft thread density of 46 threads / inch is coated with a 1mm thick silicone rubber compo...

manufacture example 1

[0058] Fill the Ross mixer with the following components: 100 parts by mass of dimethylpolysiloxane (which corresponds to the Component (a-1)); 60 parts by mass of wet-process silica (Nipsil LP; product of Nippon Silica Co., Ltd.); 9.7 parts by mass of hexamethyldisilazane; 4.4 parts by mass of water and 0.7 mass parts of a copolymer of methyl vinyl siloxane and dimethyl siloxane (10.9 mass % ethylene base content; corresponding to component (a-6) in Table 1). After these components were uniformly mixed at room temperature, the resulting mixture was heat-treated at 200° C. for 2 hours under reduced pressure, whereby a flowable silica master batch 1 was prepared.

manufacture example 2

[0060] The Ross mixer was filled with the following components: 100 parts by mass of dimethylpolysiloxane whose molecular ends were terminated with dimethylvinylsiloxy groups and whose viscosity was 40,000 mPa·s; 40 parts by mass of BET specific surface area 225m 2 / g of fumed silica; 7 parts by mass of hexamethyldisilazane; 2 parts by mass of water; and 0.2 parts by mass of molecular ends capped with dimethylhydroxysiloxy groups and a viscosity of 20mPa. s A copolymer of methylvinylsiloxane and dimethylsiloxane (vinyl content of 10.9% by mass; corresponding to component (a-6) in Table 1). After mixing these components at room temperature to make them uniform, the resulting mixture was heat-treated at 200° C. for 2 hours under reduced pressure, whereby a flowable silica master batch 2 was prepared.

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PUM

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Abstract

Disclosed is a silicone rubber composition for coating a woven fabric, which is characterized in that a cured product of the composition has an elongation of 800% or more in accordance with JIS K6251 and the composition comprises the following components: (A) an organopolysiloxane having an alkenyl group therein, which is a mixture of (A-1) an organopolysiloxane having at least two alkenyl groups in the molecule and having an alkenyl group content of less than 2 mass% and (A-2) an organopolysiloxane having at least two alkenyl groups in the molecule and having an alkenyl group content of 5 mass% or more; (B) an organohydrogenpolysiloxane having a hydrogen atom bonded to a silicon atom; (C) a hydrosilylation catalyst; and (D) a reinforcing silica micropowder.

Description

technical field [0001] The invention relates to a silicone rubber composition for fabric coating and a fabric coated with the silicone rubber composition. More specifically, the present invention relates to fabric coating silicone rubber compositions and fabrics coated with silicone rubber compositions in which the product material is capable of maintaining a pressure differential between two regions having a pressure differential. Background technique [0002] Silicone-based coating compositions are used industrially for coating fabrics with silicone rubber, for example for automotive airbags. However, conventional silicone rubber-coated fabrics are not very satisfactory for applications requiring the retention of pressurized fluids for extended periods of time within sealed containers made of coated fabric materials. Such requirements must be met, for example, for side curtain airbags of motor vehicles. [0003] Japanese Unexamined Patent Application Publication (hereina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643B60R21/16C08L83/05C08L83/07D06M11/79D06M13/513
CPCC08K3/36B60R2021/23514D06M11/79D06N3/128C08G77/20D06M15/643C08G77/12D06M13/513C08L83/04C08K5/56Y10T442/20C08L83/00D06N3/12
Inventor 野副次雄辻裕一山本真一
Owner DOW CORNING TORAY CO LTD
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