Integrally Molded Body of Silicone Resin and Silicone Rubber, Method of Manufacture, and Curable Silicone Resin Composition

a technology of silicone resin and integral body, which is applied in the field of integrally molded body of silicone resin and silicone rubber, and the method of manufacturing the integrally molded body, can solve the problems of silicone rubber and silicone resin adhesion, and the molding of silicone rubber and silicone resin into an integral body

Inactive Publication Date: 2008-10-16
DOW CORNING TORAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented invention is that it provides a way to make sure a strong and secure material made from both silicone resin and silicone rubber can be used together effectively without compromising their quality or performance. This makes production more efficient and cost-effective.

Problems solved by technology

The technical problem addressed by this patent is how to create a strong and secure joint between two materials that can be easily formed together without leaving any residue on their surface when they come off during production or usage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Practical Example 1

[0077]A curable silicone resin composition (R1) was prepared by combining (i) a mixture composed of 84 gram of polyphenylmethylvinylsiloxane resin having a weight-average molecular weight of 1,600, and represented by the average molecular formula (PhSiO3 / 2)7(ViMe2SiO1 / 2)3, and 16 grain of polyphenylmethylvinylsiloxane resin having a weight-average molecular weight of 408, and represented by the average molecular formula (PhSiO3 / 2)(ViMe2SiO1 / 2)3; (ii) a mixture composed of 84 gram of polyphenylmethyl-hydrogensiloxane having a weight-average molecular weight of 1,100, and represented by the average molecular formula (PhSiO3 / 2)6 (HMe2SiO1 / 2)4, and 0.17 gram of 1-ethynyl-1-cyclohexanol.

[0078]This mixture was further combined with 0.017 gram of a complex of platinum and 1,3-divinyl-1, 1,3,3-tetramethyldisiloxane containing 4 weight percent of metallic platinum. In curable silicone resin composition (R1), the ratio of the mole number of silicon-bonded hydrogen

example 2

Practical Example 2

[0082]A curable silicone resin composition (R2) was prepared by combining (i) a mixture composed of 77 gram of polyphenylmethylvinylsiloxane resin having a weight-average molecular weight of 1,600, and represented by the average molecular formula (PhSiO3 / 2)7(ViMe2SiO1 / 2)3, and 23 gram of polyphenylmethylvinylsiloxane resin having a weight-average molecular weight of 408, and represented by the average molecular formula (PhSiO3 / 2)(ViMe2SiO1 / 2)3; (ii) a mixture composed of 75 gram of polyphenylmethylhydrogensiloxane having a weight-average molecular weight of 1,100, and represented by the average molecular formula (PhSiO3 / 2)6(HMe2SiO1 / 2)4, and 0.21 gram of 1-ethynyl-1-cyclohexanol. This mixture was combined with 0.016 gram of a complex of platinum and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane containing 4 weight percent of metallic platinum. The ratio of the mole number of silicon-bonded hydrogen atoms to the mole number of vinyl groups in the curable silic

example 3

Practical Example 3

[0084]1,720 gram of the silicone rubber base prepared in Practical Example 1 were combined with 16 gram a methylhydrogensiloxane-dimethylsiloxane copolymer capped at both molecular terminals with trimethylsiloxy groups, and having the average molecular formula Me3SiO(MeHSiO2 / 2)3(Me2SiO2 / 2)3SiMe3, and 3.5 gram of a polymethylhydrogensiloxane capped at both molecular terminals with trimethylsiloxy groups, and having a viscosity of 20 mPa·s. The components were mixed in a two-roll mill, combined, and kneaded with 1.5 gram of 1-ethynyl-1-cyclohexanol, and 0.15 gram of a complex of platinum and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane containing 4 weight percent of metallic platinum. A silicone rubber composition (E2) was obtained with a ratio of the mole number of silicon-bonded hydrogen atoms to the mole number of vinyl groups of 2.9.

[0085]A metal mold was loaded with equal half-quantities of the curable silicone resin composition (R1) prepared in Practical Example

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Abstract

An integrally molded body of a silicone resin and silicone rubber comprises a cured body of a curable silicone composition (A) comprising an organopolysiloxane resin (A1) that contains at least two silicon-bonded alkenyl groups, and not less than 30 mole percent of total siloxane units of RsiO3/2 units, an organopolysiloxane (A2) that contains at least two silicon-bonded hydrogen atoms, and a platinum group metal catalyst (A3) in a catalytic amount, and a cured body of a silicone rubber composition (B) comprising diorganopolysiloxane (B1) that contains at least two silicon-bonded alkenyl groups, a organopolysiloxane (B2) that contains at least two silicon-bonded hydrogen atoms, and a platinum group metal catalyst or an organic peroxide (B3) in a catalytic amount. The manufacture of the integrally molded body is carried out by curing composition (A) and composition (B) in the same mold.

Description

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Claims

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Application Information

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Owner DOW CORNING TORAY CO LTD
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