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Preparation method of additive applied in addition type liquid silicone rubber

A liquid silicone rubber and additive technology, applied in the chemical industry, can solve problems such as platinum catalyst poisoning, and achieve the effect of improving performance, good compatibility, and improving flame retardancy

Inactive Publication Date: 2012-04-18
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the above technologies, the former only prevents trace poisoning agents that may be mixed into the system, and is only applicable to systems with only trace poisoning agents. When the poisoning dose is large, the platinum catalyst can still be poisoned.

Method used

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  • Preparation method of additive applied in addition type liquid silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 100 parts of raw rubber and 30 parts of fumed silica in a kneader to obtain a silicone rubber base material, add 60 parts of benzotriazole to the 100 parts of the base material and mix evenly, add 0.3 parts of 2,5 Methyl 2,5-bis(tert-butylperoxy)hexane was mixed evenly, and pressurized and vulcanized at 170°C for 10 minutes to obtain silicone rubber with benzotriazole added, which was mechanically crushed to obtain silicone rubber micropowder, which was washed with ethanol The silicone rubber micropowder is cleaned to obtain an additive for encapsulating benzotriazole in silicone rubber.

Embodiment 2

[0020] Dissolve 100 parts of phenyl silicone resin with a softening point of 180°C and 100 parts of benzotriazole in toluene to make a solution, pass the solution through a sharp hole, and spray it into a heated spray dryer to obtain a fine powder, which is immersed in stirring and cleaning in ethanol to remove the benzotriazole on the surface of the micropowder, and drying in the air to obtain an additive for encapsulating the benzotriazole with silicone resin.

Embodiment 3

[0022] 4.0g of sodium lauryl sulfate and 200ml of water were stirred and heated to dissolve to obtain a transparent solution, and moved into a flask equipped with a thermometer, a reflux condenser, and a stirrer, stirred, and heated under N 2 Under protection, the temperature was raised to 70°C. Dissolve 25g of benzotriazole in an appropriate amount of isopropanol to prepare a solution, slowly add it to the flask, dissolve 0.5g of potassium persulfate in 2g of 5 styrene monomer, and add it to the reaction system by gradually dropping. React for 4 hours, heat up to 90°C and react for 0.5h, stop the reaction and cool down, add magnesium sulfate aqueous solution to break the emulsion, wash repeatedly with absolute ethanol and distilled water, filter with suction, and obtain polystyrene-encapsulated benzotriazole after vacuum drying at 80°C additives.

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Abstract

The invention discloses a preparation method of an additive applied in an addition type liquid silicone rubber. The additive is an organic matter or organic mixture particle which is sealed by polymers and contains one or more of N, P, and S. When the additive is applied in the addition type liquid silicone rubber, a platinum catalyst can not get poisoned. The additive can improve the flame resistance, heat conduction, high temperature resistance, electrical trace resistance, low compression set, static electricity resistance and other performances of the addition type liquid silicone rubber. The sealing process improves the compatibility between the additive and the rubber compound, and is beneficial to the uniform dispersing of the additive in the rubber compound and the improvement of the performances of the material.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing an additive used in addition-type liquid silicone rubber. Background technique [0002] "Study on anti-poisoning of addition-type silicone rubber" ("Organosilicon Materials", 2001, 15(1): 24-26) and the Chinese patent "Preparation method of an anti-poisoning silicone rubber" (application number 201010148387.7) are both It is by adding organoaluminum compounds to the silicone rubber formula to solve the problem of platinum catalysts caused by trace organic compounds containing elements such as N, P, S, or heavy metal ion compounds such as Sn, Pb, Hg, Bi, As, and unsaturated organic compounds containing alkyne groups. Poisoning affects vulcanization issues. The US patent "METHOD FOR PREPARING A MICROENCAPSULATED COMPOUND OF A PLATINUM GROUP METAL" (US4784879) prepares a one-component addition type liquid silicone rubber by encapsulating a platinum catalyst w...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K5/3475C08K5/405C08K5/31C08K5/3432C08K5/315C08L83/04
Inventor 曾建伟肖贵斌汤胜山
Owner 东莞市贝特利新材料有限公司
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