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Curable Fluoropolyether Gel Composition and Gel Article

A technology of gel composition and fluorine-containing polyether, which is applied in the field of gel products and can solve problems such as changes in curing hardness and long-term storage stability, and incompatibility of base polymers

Active Publication Date: 2014-06-04
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, over time, segregation occurs in the composition because these reaction modifiers form coordination complexes with platinum-based catalysts that are very incompatible with the base polymer
Because some reaction modifiers are volatile, they can evaporate during the vacuum degassing step, causing changes in curability, hardness in the cured state, and long-term storage stability

Method used

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  • Curable Fluoropolyether Gel Composition and Gel Article
  • Curable Fluoropolyether Gel Composition and Gel Article
  • Curable Fluoropolyether Gel Composition and Gel Article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0174] In the planetary mixer, load 58 parts of the polymer (viscosity 5000mm) of following formula (9) 2 / s, vinyl content 0.012 mol / 100 gram), 17 parts have the polymer of following formula (10) (viscosity 600mm 2 / s, vinyl content 0.023 mol / 100 g) and 25 parts of Demnum S-65 (perfluoropolyether oil produced by Daikin Industries, Ltd.). Mix ingredients until homogeneous. To the mixture, 0.02 parts of ethanol solution of platinum-divinyltetramethyldisiloxane complex (Pt concentration: 3.0 wt%), 0.12 parts of fluorinated acetylenic alcohol having the following formula (11) and 18.4 parts of A fluorinated organohydrogensiloxane (Si—H content of 0.00062 mol / g) having the following formula (12) was mixed until uniform to obtain a curable composition.

[0175]

[0176] The average value of p1+q1 (representing the weight average molecular weight) was 90.

[0177]

Embodiment 2

[0179] A curable composition was prepared as in Example 1 except that 0.12 parts of a fluorinated acetylenic alcohol having the following formula (13) was used instead of the fluorinated acetylenic alcohol having the formula (11).

[0180]

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Abstract

A curable fluoropolyether gel composition comprising (A) a linear polyfluoro compound having at least two alkenyl groups and a perfluoropolyether structure in its backbone, (B) a polyfluoromonoalkenyl compound having one alkenyl group and a perfluoropolyether structure in its backbone, (C) a fluorinated organohydrogensiloxane having at least two SiH groups, and (D) a platinum-based hydrosilylation catalyst is improved by adding (E) a fluorinated acetylene alcohol as reaction regulator. The resulting composition has advantages including uniform dispersion of the catalyst, storage stability, consistent curability, and cured hardness.

Description

technical field [0001] The present invention relates to a curable gel composition comprising a fluoropolyether, a platinum-based catalyst and a fluoroacetylenic alcohol as a reaction modifier, the composition having the advantage of including the catalyst, especially the coordination complex of the catalyst ) Uniform dispersion, storage stability, consistent curing and curing hardness. It also relates to gel preparations using the cured product of the composition. Background technique [0002] Fluorinated gel compositions and their cured gel products are known in the art. For example, Patent Document 1 discloses a fluorinated silicone composition comprising a divalent perfluoropolyether-containing compound having two alkenyl groups per molecule, an organohydrogenpolysiloxane having a silicon-bonded hydrogen atom, and Platinum-based catalysts. It is stated therein that reaction regulators such as acetylenic compounds can be added as optional components. [0003] Known rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/00C08J3/24
CPCC08L71/00C08G65/336C08L83/04C08G65/00C08G65/007C08G77/46C08G77/50C08G2650/48C08L83/12C08L83/14C08L2205/02C08L83/08
Inventor 武藤光夫福田健一盐野巳喜男
Owner SHIN ETSU CHEM IND CO LTD
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