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Curable silicon rubber composition as well as cured product and coating curing method thereof

A technology for curing silicone rubber and composition, applied in the direction of coating, etc., can solve the problems of unsatisfactory characteristics and indicators

Inactive Publication Date: 2013-08-07
SHENZHEN CAPCHEM TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The materials prepared by the prior art are still unsatisfactory in the above characteristic indicators

Method used

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  • Curable silicon rubber composition as well as cured product and coating curing method thereof
  • Curable silicon rubber composition as well as cured product and coating curing method thereof
  • Curable silicon rubber composition as well as cured product and coating curing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 150g octamethylcyclotetrasiloxane, 150g octaphenylcyclotetrasiloxane, 5g 1,1,3,3-tetramethyl-1,3-divinyldisiloxane to a 500ml dry one-necked bottle After dewatering the alkanes in vacuum at 50°C, add 2g of catalyst and raise the temperature to 160°C for 8 hours to react. After removing small molecules in vacuum, 250g of vinyl-modified linear methylphenyl polyorganosiloxane is obtained, with a viscosity of 20000mPa·s ( Component 1).

Embodiment 2

[0038] Add 150g octamethylcyclotetrasiloxane, 150g octaphenylcyclotetrasiloxane and 30g 1,1,3,3-tetramethyl-1,3-divinyldisiloxane to a 500ml dry one-necked bottle Alkanes, after removing water in vacuum at 50°C, add 4g of catalyst and raise the temperature to 160°C for 8 hours to react, and remove small molecules in vacuum to obtain 250g of vinyl-modified linear methylphenyl polyorganosiloxane with a viscosity of 2000mPa·s (component 2).

Embodiment 3

[0040] By mixing the linear methylphenyl polyorganosiloxane obtained in Example 1 and Example 2 according to a certain ratio, a linear methylphenyl polyorganosiloxane with any viscosity between 2000 and 20000 mPa·s can be obtained. alkanes mixture.

[0041] Component 1 mass (20000mPa·s)

Mass of component 2 (2000mPa·s)

Mixture viscosity

18g

2g

16000mPa·s

15g

5g

12000mPa·s

10g

10g

8000mPa·s

5g

15g

5000mPa·s

2g

18g

3000mPa·s

[0042] Table 1 Viscosities of the resulting polymethylphenylpolyorganosiloxane mixtures mixed in different proportions

[0043] The product prepared by the above reaction can be used as component (A) which is the base component of the silicone rubber composition of the present invention. Each molecule contains more than two aliphatic unsaturated groups, the viscosity is 2000-20000mPa·s at 25°C, and organopolysiloxanes containing phenyl groups can replace the ...

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Abstract

The invention aims to provide a curable silicon rubber composition which is high in refractive index, is good in rubber-like performance and strength characteristics and hardly has surface viscosity after curing. A coating agent is developed based on the composition. The curable silicon rubber composition comprises a component A, a component B and a component C, wherein the component A contains methyl phenyl polysiloxane with unsaturated bonds in aliphatic series, and the viscosity of the component A at 25 DEG C is 2000-20000 mPa.s; the component B is methyl phenyl polysiloxane of which each molecule contains a plurality of silicon-hydrogen bonds, and the viscosity of the component B at 25 DEG C is 2000-20000 mPa.s; the component C is a platinum family metal catalyst; and the mass of the component B occupies 10-90% of the total mass of the component A and the component B.

Description

technical field [0001] The invention relates to a curable silicone rubber containing cyclic organohydrogensiloxane and its cured product, in particular to a curable silicone rubber with high refractive index, good rubber-like performance and strength characteristics, and extremely low surface viscosity. A curable silicone rubber composition for a product, a cured product prepared using the composition, and a curing method. Background technique [0002] With the continuous improvement of power white LED manufacturing technology, its luminous efficiency, brightness and power have been greatly improved; at the same time, the requirements for packaging materials are getting higher and higher, and the outer packaging materials are required to maintain visible light. While having high transparency, it can have a high absorption rate of ultraviolet rays to prevent the leakage of ultraviolet rays. The use of packaging materials with high refractive index, high UV and heat aging res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C09D183/07C09D183/05
Inventor 罗佳倪犇博
Owner SHENZHEN CAPCHEM TECH CO LTD
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