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Curable silicone composition with reduced mold fouling

A silicone and composition technology, applied in the field of curable silicone compositions, can solve the problems of increasing the frequency of mold replacement, shortening the service life of molds, and reducing production efficiency

Inactive Publication Date: 2020-01-03
DOW SILICONES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cleaning of the mold can shorten the life of the mold and increase production costs by reducing production efficiency and increasing the frequency of mold changes

Method used

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  • Curable silicone composition with reduced mold fouling

Examples

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Embodiment

[0073] The following examples are included to illustrate preferred embodiments of the invention. It should be appreciated by those of skill in the art that the techniques disclosed in the examples which follow represent techniques discovered by the inventors to function well in the practice of the invention, and thus can be considered to constitute preferred modes for its practice. However, those of skill in the art should, in light of the present disclosure, appreciate that many changes can be made in the specific embodiments which are disclosed and still obtain a like or similar result without departing from the spirit and scope of the invention. All percentages are in % by weight. In Examples, the viscosity is a value at 25° C., and a part means a part by mass.

[0074] Table 1: List of abbreviations used in the examples .

[0075] abbreviation words g gram Me methyl wt weight ％ percentage mol Moore hr Hour ℃ Cels...

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Abstract

A curable silicone composition 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, R1 2R2SiO1 / 2 unit, and R1 3SiO1 / 2 unit; (B) an organopolysiloxane that has an average of at least three silicon-bonded hydrogen atoms in each molecule, wherein component (B) is an organopolysiloxane comprising (B-1) an organopolysiloxane that contains at least 0.7 mass % silicon-bonded hydrogen and that comprises SiO4 / 2 units and HR3 2SiO1 / 2 units in a ratio ranging from 1.50 to 2.50 moles of HR3 2SiO1 / 2 units per 1 mole of SiO4 / 2 units, at 50 to 100 mass % of component (B), and (B-2) a straight-chain organopolysiloxane that contains at least 0.3 mass % silicon-bonded hydrogen, at 0 to 50 mass % of component (B); and (C) a hydrosilylation reaction catalyst.

Description

[0001] Cross References to Related Applications [0002] none. technical field [0003] The present invention relates to a curable silicone composition that provides a flexible and highly transparent cured silicone material and reduces mold fouling during the molding process. The present invention also relates to cured silicone compositions formed by thermosetting curable silicone compositions. The present invention also relates to a method of curing a silicone composition comprising thermosetting the curable silicone composition in a mold. Background technique [0004] Curable silicone compositions which contain organopolysiloxanes in resin form and provide highly transparent cured silicone materials are known. For example, JP 2005-042099A (equivalent to US 2005-0006794A1) describes a silicone rubber composition comprising: an organopolysiloxane having at least two aliphatic unsaturated bonds in each molecule; having a resin structure and Contains SiO 2 unit, R with 2 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04
CPCC08G77/12C08G77/20C08L83/04C08L83/00C08K5/56B29C33/64B29C33/58B29C45/0001B29K2083/00C08G77/06C09D183/06
Inventor M·伯克马S·登特P·德康S·利德利J·麦克唐纳K·范蒂格伦F·德拜尔M·卡明斯S·克罗伊茨
Owner DOW SILICONES CORP