High-temperature-resistant strong-resilience high-safety mixed rubber

A technology of resilience and compound rubber, which is applied in the field of compound rubber and its technology

Inactive Publication Date: 2015-05-20
佛山市华勇有机硅有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of the alkane coupling agent reduces the chemical activity on the surface of the silica material, and a part of the bound vulcanization accelerator is released. In addition, the silane coupling agent also contains sulfur, which will also be released during the vulcanization process. It is pointed out that these two reasons accelerate the vulcanization rate, which leads to early vulcanization of the rubber material, affects the stability and safety of the processing technology of the rubber material, and thus has a negative impact on the quality of semi-finished products.

Method used

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  • High-temperature-resistant strong-resilience high-safety mixed rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of gel: add 5% polyisoprene, 4% polybutadiene, 1% dimethyl hydroxy silicone oil, and 10% diphenylsilanediol to an autoclave at 60°C. Then the mixture was stirred at 60° C. for 2 hours under a nitrogen atmosphere, then heated to 150° C., stirred at this temperature for 45 minutes, so that the swelling index of the gel particles was 5, and the particle size was 60 mm, and cooled;

[0029] (2) Mixing rubber: add a certain amount of methyl vinyl silicone rubber 10% in the kettle reactor, pass through nitrogen to heat and vacuum dehydrate for 2 hours, add 3% methyl vinyl cyclotetrasiloxane, The catalyst composed of diethylaluminum chloride, ethylaluminum chloride and methylaluminoxane is 2%, and the temperature is raised to 150°C to start the reaction. When the viscosity increases and becomes paste, reduce the stirring speed until the stirring is stopped. The free growth of the molecular chain of the product, the reaction is over within 2 hours, and the glue ...

Embodiment 2

[0034] (1) Gel preparation: Add 10% polyisoprene, 4% polybutadiene, 3% dimethylhydroxy silicone oil, and 8% diphenylsilanediol to an autoclave at 60 °C. Then the mixture was stirred at 60° C. for 2 hours under a nitrogen atmosphere, then heated to 150° C., stirred at this temperature for 45 minutes, so that the swelling index of the gel particles was 5, and the particle size was 60 mm, and cooled;

[0035](2) Mixing rubber: add a certain amount of methyl vinyl silicone rubber 10% in the kettle reactor, pass through nitrogen to heat and vacuum dehydrate for 2 hours, add 3% methyl vinyl cyclotetrasiloxane, Catalyst 2% composed of titanium tetrachloride, tin tetrachloride and methyl aluminoxane, start the reaction at 150 ° C, when the viscosity increases and becomes paste, reduce the stirring speed until the stirring is stopped, with the polymer molecular chain Free growth, the reaction ends within 2 hours, and gelation occurs after 2 hours of equilibrium;

[0036] (3) One-stage...

Embodiment 3

[0040] (1) Preparation of gel: Add 6% polyisoprene, 4% polybutadiene, 2% dimethyl hydroxy silicone oil, and 82% diphenylsilanediol to an autoclave at 60°C. Then the mixture was stirred at 60°C for 2 hours under a nitrogen atmosphere, then heated to 150°C, stirred at this temperature for 45 minutes, so that the swelling index of the gel particles was 5 and the particle size was 60 mm, and cooled;

[0041] (2) Mixing rubber: add a certain amount of methyl vinyl silicone rubber 10% in the kettle reactor, feed nitrogen to heat and vacuum dehydrate for 2 hours, add 4% methyl vinyl cyclotetrasiloxane, The catalyst composed of ethylaluminum chloride, titanium tetrachloride and tin tetrachloride is 2%, and the reaction starts at 150°C. When the viscosity increases and becomes paste, reduce the stirring speed until the stirring is stopped. With the polymer molecular chain Free growth, the reaction ends within 2 hours, and gelation occurs after 2 hours of equilibrium;

[0042] (3) One-...

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Abstract

The invention discloses high-temperature-resistant strong-resilience high-safety mixed rubber, and is characterized in that the mixed rubber comprises the following components by the weight percentage: 10-30% of natural rubber, 5-10% of chloroprene rubber, 5-10% of polyisoprene, 4-6% of polybutadiene, 5-15% of white carbon black, 8-12% of a silicon alkyl coupling agent, 10-20% of methyl vinyl silicone rubber, 3-4% of tetravinyltetramethylcyclotetrasiloxane, 1-2% of a catalyst, 1-3% of dimethyl hydroxyl silicone oil, 8-10% of dihydroxydiphenylsilane, 2-3% of a heat stabilizer, 2-3% of a surface modification agent, 5-8% of zinc oxide, 1-2% of stearic acid, 2-6% of sulfur, 1-2% of an accelerator, and 1-3% of other auxiliary agents. The wear resistance is improved, the life problem is overcome, introduction of butyl rubber is known to be capable of improving a wet-skid resistance ability of the mixed rubber, and the obtained mixed rubber has excellent mechanical properties, resilience and high-temperature resistance; and through innovating a rubber mixing technology and changing a feeding sequence, a portion of parts of the sulfur is put in masterbatch rubber to prolong the rubber scorching time, and the rubber processing safety performance is ensured.

Description

technical field [0001] The invention belongs to the technical field of rubber mixing, and in particular relates to a rubber mixing with high processing safety performance and a process thereof. Background technique [0002] In modern military industry, aerospace industry, transportation industry such as automobile and ship, petrochemical industry, and medical and health industries such as artificial organs and medical equipment, a kind of silicone rubber with excellent high and low temperature characteristics and fluorine rubber with high temperature resistance and chemical corrosion resistance is required. , New material with oil resistance. Fluorine-containing silicon polymer is a new material developed on the basis of organic silicon materials and organic fluorine materials. Its main chain has a silicon-containing structure and side chains have a fluorine-containing structure, which makes fluorine-containing silicon polymers a modern industrial Indispensable specialty ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L11/00C08L47/00C08L83/07C08L83/06C08L23/22C08K13/02C08K3/36C08K3/22C08K5/09C08K3/06C08K5/548B29B7/00
CPCB29B7/00C08F283/124C08L7/00C08L11/00C08L2201/08C08L2205/035C08L47/00C08L51/08C08L83/04C08K13/02C08K3/36C08K2003/2234C08K2003/2296C08K5/09C08K3/06C08F230/08
Inventor 修相鹏
Owner 佛山市华勇有机硅有限公司
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