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Room temperature curable fluorine-containing polyether rubber composition and its cured product

A rubber composition and fluorine-containing polyether technology are applied in the field of room temperature-curable fluorine-containing polyether-based rubber combinations of joint type, which can solve problems such as adverse effects on physical properties such as hardness of cured products with curing characteristics, and curing obstacles, and achieve long-term storage. Excellent stability

Inactive Publication Date: 2016-08-03
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, this fluorine-modified amino group-containing organopolysiloxane absorbs moisture over time in the air, and the composition is hindered in curing due to the influence of the moisture absorbed. The problem that the hardness and other physical properties of the cured product have adverse effects

Method used

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  • Room temperature curable fluorine-containing polyether rubber composition and its cured product
  • Room temperature curable fluorine-containing polyether rubber composition and its cured product
  • Room temperature curable fluorine-containing polyether rubber composition and its cured product

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0139] Manufacture of matrix compound for room temperature curable composition

[0140] With 100 mass parts by the polymkeric substance (viscosity 7.8Pa·s, number average molecular weight 15,700) and 40 mass parts represented by following formula (2) with fatty acid, the colloidal calcium carbonate (average particle diameter) that filler is surface-treated forms ; 0.03 to 0.06 μm, product name Carrex 300: manufactured by Maruo Calcium Co., Ltd., product name) was charged into a planetary mixer, and kneaded for 1 hour. Next, three rolls were used to promote dispersion, and cooling was performed to produce a matrix compound.

[0141] [chemical formula 24]

[0142]

[0143] ( (number average degree of polymerization))

manufacture example 2

[0145] Production of crosslinking agent compound for room temperature curable composition 1

[0146] 69.0 parts by mass of a siloxane polymer containing fluorine-modified amino groups represented by the following formula (3) (viscosity 1,000Pa·s, number average molecular weight 16,000), 3.4 parts by mass of powdered molecular sieve 4A (average particle diameter 10 μm or less, manufactured by MERCK), and 8.6 parts by mass of calcium carbonate (average particle size: 1.2 μm, product name Howiton SSB Chi: manufactured by Shiraishi Calcium Co., Ltd., trade name) as a filler were put into a planetary mixer and kneaded 15 minutes, followed by mixing under reduced pressure (-65 to -75 cmHg) at room temperature for 30 minutes. Then, 40.0 parts by mass of an oily fluorine-containing polymer represented by the following formula (4) (perfluoropolymer with a vinyldimethylsilyl group at one end) was added as a viscosity modifier to the obtained compound. ether oil) was kneaded with a pl...

manufacture example 3

[0150] Production of crosslinking agent compound for room temperature curable composition 2

[0151] 69.0 parts by mass of a siloxane polymer containing a fluorine-modified amino group represented by the above formula (3) (viscosity 1,000 Pa·s, number average molecular weight 16,000), 12.0 parts by mass of calcium carbonate (product name Howiton SSB red: white stone Calcium Co., Ltd., trade name, as mentioned above) was charged into a planetary mixer, kneaded for 15 minutes, and then mixed under reduced pressure (-65 to -75 cmHg) at room temperature for 30 minutes. Then, 40.0 parts by mass of the oily fluoropolymer represented by the above formula (4) was added as a viscosity modifier to the obtained compound, kneaded by a planetary mixer for 15 minutes, and then mixed at room temperature under reduced pressure. (-65~-75cmHg) for 30 minutes to make the crosslinker compound.

[0152] [Example]

[0153] With respect to 140 parts by mass of the matrix compound produced in the...

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Abstract

The invention provides a room temperature curing fluorinated polyol serial-containing rubber composition and cured substances thereof. The composition restrains curing hinders caused by restrain moisture absorption in the air, and maintains curing properties in an initial stage and an excellent long-stem storage stability of physical properties after the curing. The room temperature curing fluorinated polyol serial-containing rubber composition is characterized by comprising (a) matrix mixtures of a linear chain fluorinated polyol compound which contains at least two ester groups in one molecule and has a number-average molecular weight of 3,000 to 100,000 of bivalent perfluoroalkyl group structure in the main chain, (b) siloxane polymers containing at least three amino groups in one molecule, and (c) cross-linking agent mixtures of molecular sieves with an average grain diameter smaller than 30 [mu]m, and the matrix mixtures and the cross-linking agent mixtures are mixed when using.

Description

technical field [0001] The present invention relates to an amide cross-linked room temperature curable fluorine-containing polyether rubber composition and its cured product. Specifically, it relates to a room temperature curable fluorinated polyether rubber composition and its cured product. The cross-linking agent component, that is, a siloxane polymer containing at least 3 amino groups in one molecule, suppresses curing hindrance caused by moisture absorption in the air for a long time, and the composition can maintain initial curing characteristics and long-term storage stability of physical properties after curing excellent. Background technique [0002] The room temperature curable fluorine-containing polyether rubber composition provides a cured product that cures in a short time at room temperature and is excellent in heat resistance, low temperature resistance, chemical resistance, solvent resistance, oil resistance, etc., so it is expected to be used in For large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/00C08L83/04C08K5/5415C08K3/34
CPCC08G65/323C08J3/24C08K7/26C08L71/00C08L83/08
Inventor 武藤光夫松田高至
Owner SHIN ETSU CHEM IND CO LTD