Curable silicone rubber composition

A silicone rubber composition, silicon bonding technology, applied in the direction of thin material handling, transportation and packaging, coating, etc., can solve the problem of unsatisfactory surface release properties of cured materials, and achieve excellent formability and processing characteristics Effect

Inactive Publication Date: 2011-12-28
DOW CORNING TORAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this composition can form a flexible surface release layer having a hardness lower than that of fluororesin coatings used for existing rollers, the surface release property of the cured material from this silicone rubber composition is not satisfactory

Method used

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  • Curable silicone rubber composition
  • Curable silicone rubber composition
  • Curable silicone rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0055] The materials shown in Table 1 were mixed until uniform in the amount ratios shown in Table 1 to manufacture a curable silicone rubber composition. The resulting composition was press cured at 120°C for 10 minutes and then kept in an oven at 200°C for an additional 4 hours to produce a 2 mm thick cured sheet. The resulting cured sheet was used to measure hardness, tensile strength, elongation and peel resistance according to the following methods. The results are listed in Table 1.

[0056] Test, measurement and evaluation methods

[0057] The properties of the cured silicone material (hardness, tensile strength, elongation and peel resistance) were measured using the following methods.

[0058] (1) Hardness

[0059] The hardness was measured using a Type A durometer specified in JIS K 6253.

[0060] (2) Tensile strength and elongation

[0061] Tensile strength and elongation were measured according to the method specified in JIS K 6251.

[0062] (3) Peel r...

Embodiment 6

[0097] The following were introduced into a planetary mixer and mixed for 2 hours: 30 parts of quartz powder (Tatsumori Co., Ltd.) having an average particle diameter of 5 μm, 3 parts of 2 Surface hydrophobized pyrogenic silica (Nippon Aerosil) of the BET specific surface area of ​​ / g, and 100 parts of both ends of the molecular chain are terminated by trimethylsiloxy groups and have a viscosity of 40000mPa·s and A dimethylsiloxane-methylvinylsiloxane copolymer having a vinyl group content of 0.12% by mass. Added thereto was 1.2 parts of dimethylsiloxanemethylhydrogensiloxane terminated by dimethylhydrogensiloxy groups at both ends of the molecular chain and having a silicon-bonded hydrogen content of about 0.4% by mass. alkane copolymer, 0.05 parts of 1-ethynyl-1-cyclohexanol, and 0.25 parts of isopropanol chloroplatinic acid solution having a platinum concentration of 0.7%, and stirred for 30 minutes. The resulting composition was poured into a 6 mm thick mold and press-cur...

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Abstract

A curable silicone rubber composition characteristically comprising (A) an alkenyl-containing organopolysiloxane comprising (A-1) a dialkylpolysiloxane that has an average of at least two alkenyl groups in each molecule and (A-2) an alkenyl-containing, resin-form organopolysiloxane that comprises the SiO4 / 2 unit, R<1>2R<2>SiO1 / 2 unit, and R<1>3SiO1 / 2 unit wherein R<1> is C1-10 alkyl and R<2> is alkenyl and that contains the alkenyl group in the range from more than 2.5 mass% to not more than 5.0 mass%; (B) an organopolysiloxane that contains the silicon-bonded hydrogen atom; and (C) a hydrosilylation reaction catalyst in a catalytic quantity and provides a cured silicone material that has a hardness is not more than 75 and the elongation is at least 35%. Also, a composite in which the cured silicone material provided by the thermosetting of the curable silicone rubber composition is integrated into a single article with a substrate.

Description

technical field [0001] The present invention relates to curable silicone rubber compositions that provide flexible cured silicone products. More particularly, the present invention relates to a curable silicone rubber composition comprising organopolysiloxane in resin form, exhibiting excellent surface release properties, and capable of forming a flexible cured silicone layer on a substrate. Background technique [0002] Curable silicone rubber compositions comprising organopolysiloxanes in resin form and providing cured silicone products are known. For example, JP 2005-042099A (same as US2005-0006794A1) describes a silicone rubber composition comprising: an organopolysiloxane having at least two aliphatic unsaturated bonds in each molecule; having a resinous structure and including SiO 2 unit, R with 2-3 vinyl groups 3 SiO 0.5 unit, and R with 0-1 vinyl groups 3 SiO 0.5 unit of organopolysiloxane, wherein the non-vinyl R in these formulas is a monovalent hydrocarbon g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C09D183/04
CPCC08G77/20C08L83/04C08G77/12C09D183/04Y10T428/31663C08L83/00
Inventor 吉田宏明石神望长谷川知一郎吉武诚
Owner DOW CORNING TORAY CO LTD
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