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Curable fluoropolyether-based rubber composition and optical component

A kind of rubber composition, fluoropolyether technology, applied in optical components, optics, polyether coatings, etc., can solve the problem of reduced light transmittance of cured products

Active Publication Date: 2021-06-18
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, although the impact resistance is improved, there may be a disadvantage that the light transmittance of the cured product is greatly reduced.

Method used

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  • Curable fluoropolyether-based rubber composition and optical component
  • Curable fluoropolyether-based rubber composition and optical component
  • Curable fluoropolyether-based rubber composition and optical component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4、 comparative example 1～4

[0266] The components (A) to (E) used in the following Examples and Comparative Examples are shown below. In addition, in the following examples, Me represents a methyl group.

[0267] (A) Ingredients

[0268] (A-1): A straight-chain polyfluoro compound represented by the following formula (22) (viscosity 4010 mPa·s, vinyl content 0.0301 mol / 100 g)

[0269] [chem 35]

[0270]

[0271] (wherein, w" and x" are integers above 1, and the average value of w"+x" is 35.)

[0272] (A-2): A straight-chain polyfluoro compound represented by the following formula (23) (viscosity 11000 mPa·s, vinyl content 0.0119 mol / 100 g)

[0273] [chem 36]

[0274]

[0275] (wherein, y" and z" are integers greater than 1, and the average value of y"+z" is 90.)

[0276] (B) Ingredients

[0277] (B-1): Fluorine-containing organohydrogensiloxane represented by the following formula (24) (SiH group content: 0.00394 mol / g)

[0278] [chem 37]

[0279]

[0280] (B-2): Fluorine-containing orga...

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Abstract

Provided are: a curable fluoropolyether-based rubber composition from which a cured product having good light transmissivity and excellent rubber strength is produced; and an optical component having a cured product layer of said composition. The curable fluoropolyether-based rubber composition contains: (A) a linear polyfluoro compound having at least two alkenyl groups in one molecule and a perfluoropolyether structure in a main chain; (B) a fluorine-containing organohydrogen siloxane which has at least two hydrogen atoms directly bonded to a silicon atom (SiH group) and has a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group or a divalent perfluoroalkylene group or a divalent perfluorooxyalkylene group in one molecule; (C) sodium fluoride; and (D) a platinum group metal-based catalyst in an amount of 0.1-2,000 ppm in terms of the mass of a platinum group metal atom with respect to component (A).

Description

technical field [0001] The present invention relates to a curable fluoropolyether rubber composition and an optical component having a cured product layer of the composition. Background technique [0002] So far, as curable fluorine-containing compositions, there have been proposed linear fluoropolyether compounds having at least two alkenyl groups in one molecule and a perfluoropolyether structure in the main chain, and two alkenyl groups in one molecule. Composition of fluorine-containing organohydrogensiloxane having more than one hydrogen atom directly bonded to silicon atom and platinum group metal compound, disclosing that heat resistance, chemical resistance, solvent resistance, mold release can be obtained from the composition A cured product with an excellent balance of properties, water repellency, oil repellency, and low-temperature properties (Patent Document 1: Japanese Patent No. 2990646). [0003] In addition, as a composition capable of forming a cured produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/00C08K3/013C08K3/16C08K5/56C08L83/05
CPCC08K3/16C08G65/007C08G65/336C09D171/00C08L71/00C08L2201/10G02B1/04
Inventor 越川英纪
Owner SHIN ETSU CHEM IND CO LTD
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