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Preparation method of oil-resistant room temperature vulcanization deoximation silicon rubber

A technology of room temperature vulcanization and silicone rubber, which is applied in the field of room temperature curable silicone rubber, which can solve the problems of high cost, limited application, and poor non-polar oil resistance of silicone rubber.

Inactive Publication Date: 2012-07-04
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Silicone rubber has excellent high and low temperature resistance, weather resistance, and electrical insulation properties, and is widely used in various fields of the national economy; especially in the automotive field, it replaces seals in plane seals such as engine oil pans, gearboxes, and axles. Pads play an important role; but silicone rubber itself is not very resistant to non-polar oils, which limits its application in the automotive field; as everyone has higher and higher requirements for automotive emissions and oil leakage, traditional silicon rubber Rubber is increasingly unable to meet the actual requirements; although fluorine-containing silicone rubber with excellent non-polar oil resistance has appeared on the market, its expensive cost limits its scope of promotion; therefore, improving the oil resistance of silicone rubber has important meaning

Method used

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  • Preparation method of oil-resistant room temperature vulcanization deoximation silicon rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Set the kinematic viscosity to 20000 mm 2 / s of α, ω-dihydroxy polydimethylsiloxane and light calcium carbonate after stearic acid surface treatment are stirred in a kneader; add vinyl tributylketoximosilane for full stirring; add gas phase method The white carbon black is fully stirred; after adding the reactant of aminopropyltriacetoneximosilane and 3-isocyanatopropyltrimethoxysilane and dibutyltin dilaurate and fully stirring, the product is obtained by gelling.

[0021] serial number components Dosage / serving 1 α,ω-Dihydroxypolydimethylsiloxane 80 2 calcium carbonate 120 3 Vinyl tributylketoxime silane 10 4 Fumed silica 15 5 Reaction product of aminopropyltriacetoneximosilane and 3-isocyanatopropyltrimethoxysilane 2 6 Dibutyltin dilaurate 1.5

[0022] Oil resistance

[0023]

Embodiment 2

[0025] Set the kinematic viscosity to 50000 mm 2 / s of α, ω-dihydroxy polydimethylsiloxane and light calcium carbonate after stearic acid surface treatment are stirred in a kneader; add methyl tributylketoximosilane for full stirring; add gas phase method The white carbon black is fully stirred; after adding the reactant of aminopropyl tributylketoxime silane and 3-isocyanatopropyl triethoxysilane and dioctyltin dilaurate and fully stirring, the product is obtained by gelling.

[0026] serial number components Dosage / serving 1 α,ω-Dihydroxypolydimethylsiloxane 30 2 calcium carbonate 30 3 Methyltributanoximinosilane 5 4 Fumed silica 5 5 Reactant of Aminopropyltributanoximinosilane and 3-Isocyanatopropyltriethoxysilane 1.5 6 Dioctyltin dilaurate 1

[0027] Oil resistance

[0028]

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PUM

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Abstract

The invention discloses a preparation method of an oil-resistant room temperature vulcanization deoximation silicon rubber. According to the invention, a reactant of aminopropyl triacetoximo silane or aminopropyl tributanoximo silane and isocyanate-alkoxy silane is used as a coupling agent, and the preparation method of the oil-resistant room temperature vulcanization deoximation silicon rubber comprises the following steps of: stirring alpha,omega-diyhydroxy polydimethylsiloxane and calcium carbonate in a kneading machine; adding a cross-linking agent and stirring fully; adding white carbon black and stirring fully; and after adding the coupling agent and a catalyst and stirring uniformly, discharging the rubber to obtain a product. According to the invention, the oil resistance of the silicon rubber is improved, and the oil-resistant room temperature vulcanization oxime-silicon removal rubber can be used in a common oil-resistant occasion.

Description

technical field [0001] The invention relates to room temperature curable silicone rubber, in particular to deoxime silicone rubber with oil resistance after room temperature curing and a preparation method. Background technique [0002] Silicone rubber has excellent high and low temperature resistance, weather resistance, and electrical insulation properties, and is widely used in various fields of the national economy; especially in the automotive field, it replaces seals in plane seals such as engine oil pans, gearboxes, and axles. Pads play an important role; however, silicone rubber itself is not very resistant to non-polar oils, which limits its application in the automotive field; as everyone has higher and higher requirements for vehicle emissions and oil leakage, traditional silicone Rubber is increasingly unable to meet the actual requirements; although fluorine-containing silicone rubber with excellent non-polar oil resistance has appeared on the market, due to its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08K13/06C08K9/04C08K3/26C08K3/36C08K5/5465
Inventor 孙应发李印柏翟海潮林新松王兵
Owner TONSAN ADHESIVES INC
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