High-strength addition type liquid silicone rubber impregnating liquid and preparation and forming methods thereof

A liquid silicone rubber, addition molding technology, applied in the coating and other directions, can solve the problems of low mechanical strength of silicone rubber impregnated products, and the practical application value needs to be improved, achieve reasonable components and proportions, optimize mechanical properties and processing. Process, the effect of small shrinkage

Active Publication Date: 2017-07-25
佛山市方普防护技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN103214856B discloses a preparation method of dip-molding silicone rubber products, but the mechanical strength of the dip-molding silicone rubber products prepared by it is low, and the practical application value needs to be improved

Method used

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  • High-strength addition type liquid silicone rubber impregnating liquid and preparation and forming methods thereof
  • High-strength addition type liquid silicone rubber impregnating liquid and preparation and forming methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The present embodiment prepares the silicone rubber impregnation solution according to the following steps:

[0035] Step 1, 90 parts of 50000mPa·s terminal vinyl silicone oil, 10 parts of 20000mPa·s terminal vinyl silicone oil, 5 parts of polyvinyl silicone oil (vinyl content 4.7%), vinyl MQ silicone resin (vinyl content 0.9%) , M / Q=0.6) 20 parts, put into kneader, knead at room temperature for 1h;

[0036] Step 2. Raise the temperature to 80°C, continue kneading the kneaded product of step 1 for 1 hour, and add silazane in ten times during the kneading process to obtain a specific surface area of ​​175m 2 25 parts per gram of fumed silica; heat up to 120°C, knead for 4 hours; then cool to room temperature, slowly add 50 parts of 5000mPa·s terminal vinyl silicone oil, 30 parts of 1500mPa·s terminal vinyl silicone oil, and continue kneading 1.5h, finally evacuated and kneaded for 1h, and the kneaded final product was obtained after discharging;

[0037] Step 3. Put th...

Embodiment 2

[0041] The present embodiment prepares the silicone rubber impregnation solution according to the following steps:

[0042] Step 1, 70 parts of 50000mPa·s terminal vinyl silicone oil, 30 parts of 20000mPa·s terminal vinyl silicone oil, 5 parts of polyvinyl silicone oil (vinyl content 4.7%), vinyl MQ silicone resin (vinyl content 0.9%) , M / Q=0.6) 20 parts, put into kneader, knead at room temperature for 1h;

[0043] Step 2. Raise the temperature to 80°C, continue kneading the kneaded product of step 1 for 1 hour, and add silazane in ten times during the kneading process to obtain a specific surface area of ​​175m 2 25 parts per gram of fumed silica; then heat up to 120°C and knead for 4 hours; then cool to room temperature, add 50 parts of 5000mPa·s terminal vinyl silicone oil and 20 parts of 1500mPa·s terminal vinyl silicone oil slowly, and continue kneading 1.5h, finally evacuated and kneaded for 1h, and the kneaded final product was obtained after discharging;

[0044] Ste...

Embodiment 3

[0048] The present embodiment prepares the silicone rubber impregnation solution according to the following steps:

[0049] Step 1, 60 parts of 50000mPa·s terminal vinyl silicone oil, 40 parts of 20000mPa·s terminal vinyl silicone oil, 5 parts of polyvinyl silicone oil (vinyl content 4.7%), vinyl MQ silicone resin (vinyl content 0.9%) , M / Q=0.6) 20 parts, put into kneader, knead at room temperature for 1h;

[0050] Step 2. Raise the temperature to 80°C, continue kneading the kneaded product of step 1 for 1 hour, and add silazane in ten times during the kneading process to obtain a specific surface area of ​​175m 2 25 parts per gram of fumed silica; heat up to 130°C, knead for 4 hours; then cool to room temperature, add 50 parts of 5000mPa·s terminal vinyl silicone oil and 20 parts of 1500mPa·s terminal vinyl silicone oil slowly, and continue kneading 1.5h, finally evacuated and kneaded for 1h, and the kneaded final product was obtained after discharging;

[0051] Step 3. Put...

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Abstract

The invention discloses a high-strength addition type liquid silicone rubber impregnating liquid and preparation and forming methods thereof. The high-strength addition type liquid silicone rubber impregnating liquid is characterized by being prepared by mixing vinyl silicone oil, white carbon black, reinforced silicon resin, hydrogen-containing silicone oil, an inhibitor, a catalyst and a defoamer. The impregnating liquid impregnate and cure a mold to obtain a silicone rubber impregnated and formed product. The silicone rubber impregnated and formed product is good in transparence and high in mechanical strength.

Description

technical field [0001] The invention relates to a silicone rubber impregnating solution and a silicone rubber impregnated molded product. Background technique [0002] Liquid silicone rubber has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance, aging resistance, light resistance, insulation, heat insulation and other properties. low temperature) to +250°C (or higher temperature) range. Addition-type liquid silicone rubber has the advantages of no release of small molecular substances during vulcanization, high product transparency, stable processing dimensions, and wide process applicability. It has been widely used in the fields of automobiles, construction, electronic power, medical equipment, mechanical engineering, and aerospace. , and its processing and molding are more commonly used in injection, molding, extrusion, casting and other molding methods. [0003] The dip molding process has the character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/04C08K3/36B29B7/90B29C41/02
CPCB29B7/90B29C41/02C08K2201/006C08L83/04C08L2205/025C08L2205/035C08K9/04C08K3/36
Inventor 吴亚玲方松喜丁运生杨绪锋薛攀
Owner 佛山市方普防护技术有限公司
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