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Curable organopolysiloxane composition and sheet-form article having a cured layer obtained therefrom

A technology of polysiloxane and composition, applied in the fields of preparing products in sheet form, preparing surface protection sheets, and surface protection sheets, can solve the problems of poor smoothness of the coating, application limitations, etc., and achieve excellent anti-sticking, low speed, etc. effect of dependence

Active Publication Date: 2014-07-09
DOW CORNING TORAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, existing solvent-free organopolysiloxane compositions for forming cured release coatings employ a low-viscosity organopolysiloxane base component of about 50 cs to 1000 cs, and do not contain high-viscosity organopolysiloxane base components. Silicone, so although this composition provides excellent coatability, the resulting cured coating shows poor smoothness, with the disadvantage that its application is limited as a result

Method used

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  • Curable organopolysiloxane composition and sheet-form article having a cured layer obtained therefrom
  • Curable organopolysiloxane composition and sheet-form article having a cured layer obtained therefrom
  • Curable organopolysiloxane composition and sheet-form article having a cured layer obtained therefrom

Examples

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Embodiment 2

[0127] 46.8 parts (A1) of polydimethylsiloxane having a hexenyl group at both ends of the molecular chain and in the side chain position, a viscosity of 220 mPa·s, and a hexenyl content of 1.15% by mass, 44.5 parts ( A2) Polydimethylsiloxane having a hexenyl group at both ends of the molecular chain and in the position of the side chain, a viscosity of 100 mPa·s, and a hexenyl content of 3.00% by mass, 3.0 parts (B1) having a 1.4 mm Plasticity and vinyl-terminated dimethylsiloxane gum at the end of the molecular chain, 7.8 parts (C1) have a viscosity of 25 mPa·s and a silicon-bonded hydrogen atom content of 1.6% by mass and at both ends of the molecular chain Trimethylsiloxy-terminated methylhydrogenpolysiloxane and 0.2 parts of (E) 1-ethynyl-1-cyclohexanol (ETCH) were mixed until uniform. (D) Chloroplatinic acid 1,3-divinyl-1,1-3,3-tetramethyldisiloxane having a platinum metal content of 0.6% by mass in an amount to provide a platinum metal content of 100 ppm The complex was...

Embodiment 5

[0142] The kinetic coefficient of friction was measured on the cured layer as in Example 2, but in this case polyethylene terephthalate (PET) film was used instead of polyethylene-laminated paper. The results are reported in Table 2.

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Abstract

A curable organopolysiloxane composition comprising (A) at least one organopolysiloxane having a viscosity of 20 mPa·s to 500 mPa·s and a higher alkenyl content in the range of 1.0 to 5.0% by mass, ( B) an organopolysiloxane having a viscosity of at least 1,000,000 mPa·s and an alkenyl content of 0.005 to 0.1% by mass, (C) an organohydrogenpolysiloxane, and (D) a platinum-type catalyst. Even when applied as a thick coating on a substrate, the cured layer exhibits inhibition of kinetic coefficient of friction enhancement.

Description

technical field [0001] The present invention relates to a curable organopolysiloxane composition which, when applied as a thick coat to a substrate, forms a compound which, when applied as a thick coat, exhibits an improved response to cure which is characteristically shown to be superior to when applied as a thin coat. Suppression of the increase in the kinetic coefficient of friction of the layer and a small dependence of the kinetic coefficient of friction on speed for the cured layer. More specifically, the present invention relates to an easy-handling curable organopolysiloxane composition that can form a cured layer on the surface of a substrate and can provide excellent releasability to pressure-sensitive adhesives and sticky substances. ), and can provide smooth (smooth slipperiness) of the cured layer. The invention also relates to an article in sheet form having a cured layer provided by curing this composition, and in particular to a laminate comprising such an art...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C09D183/04
CPCC08G77/20C08L83/04C08G77/12C09D183/04C08L83/00C08J5/18C08J7/08C08J2483/04C09J7/40C08J7/0427
Inventor 山田修二山田高照
Owner DOW CORNING TORAY CO LTD