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Fluorosilicone rubber composition

A technology of fluorosilicone rubber and composition, applied in the field of fluorosilicone rubber composition, to achieve the effect of less strength loss

Active Publication Date: 2015-09-16
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organopolysiloxane alone is still insufficient as a structural material durable to alcohol-containing fuels

Method used

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  • Fluorosilicone rubber composition
  • Fluorosilicone rubber composition
  • Fluorosilicone rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2 and comparative example 1 and 2

[0074] Prepare the fluorosilicone raw rubber (vinyl content: 0.13mol%) of formula (10) and the fluorosilicone raw rubber (vinyl content: 0.0125mol%) of formula (11) as shown in Table 1. A raw rubber blend. As shown in Table 1, to 100 parts by weight of various raw rubber blends, 45 parts by weight of 2 Dry-process silica (Aerosil 130, Nippon Aerosil Co., Ltd.) and 10 parts by weight of diphenylsilanediol as a dispersant per gram of specific surface area were uniformly kneaded, heat-treated at 150° C. for 4 hours, and The fluorosilicone base compound is obtained by milling on a two-roll mill for mastication and plasticization. The base compounds were named A, B, C and D.

[0075]

[0076] To 100 parts by weight of each base compound was added 1 part by weight of 2 Cerium oxide / g specific surface area and 0.8 parts by weight of a paste containing 80% by weight of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane. These were mixed on a two-roll mill until homogeneous. Four flu...

Embodiment 3 and comparative example 3 and 4

[0084] As shown in Table 3, the fluorosilicone raw rubber (vinyl content: 0.25mol%) of the formula (12) and the fluorosilicone raw rubber (vinyl content: 0.0125mol%) of the formula (11) or the formula (13) were prepared. Three raw rubber blends of fluorosilicone raw rubber (vinyl content: 0.011 mol%). Add 40 parts by weight to 100 parts by weight of each raw rubber blend with 90m 2 / g or 200m 2 Dry-process silica (Aerosil 90 or Aerosil 200, Nippon Aerosil Co., Ltd.) of specific surface area per g and 10 parts by weight of diphenylsilanediol as a dispersant were uniformly kneaded and heat-treated at 150°C for 4 Hours, and knead on a two-roll mill to masticate and plasticize to obtain a basic compound. The base compounds were named E, F and G.

[0085]

[0086] To 100 parts by weight of each base compound was added 1 part by weight of 2 / g of specific surface area of ​​cerium oxide and 0.8 parts by weight of a paste containing 80% by weight of 2,5-dimethyl-2,5-bis(tert-bu...

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Abstract

A fluorosilicone rubber composition comprising (A) an alkenyl-rich fluorosilicone gum, (B) an alkenyl-poor fluorosilicone gum, (C) reinforcing silica, and (D) a curing catalyst cures into a product which experiences little change of physical strength even after immersion in alcohol-containing fuel oil.

Description

[0001] Cross References to Related Applications [0002] This nonprovisional application claims priority under 35 U.S.C. Section 119(a) to Patent Application No. 2014-048767 filed in Japan on March 12, 2014, the entire contents of which are incorporated by reference Incorporated into this article. technical field [0003] The present invention relates to fluorosilicone rubber compositions that cure to a product that undergoes little loss of strength even after immersion in alcohol-containing fuels. Background technique [0004] Silicone rubber compositions are used in a wide variety of fields due to their advantages including ease of processing, ease of molding, and excellent molding properties such as heat resistance, cold resistance, weather resistance, and electrical insulation. Especially compositions based on fluorosilicone rubber with 3,3,3-trifluoropropyl groups as side chains are also resistant to solvents and are used as diaphragms, O-rings, oil seals and other par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/08C08K3/36C08K3/22C08K5/14
CPCC08G77/20C08G77/24C08L83/08C08K3/36C08L83/00
Inventor 林田修宇野贵雄大石和弘鹿岛敦人
Owner SHIN ETSU CHEM CO LTD
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