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Rubber composition of chemically modified chlorinated polyethylene and unsaturated rubber and preparation method thereof

A technology of chlorinated polyethylene and rubber composition, applied in the field of rubber composition, can solve the problems of phase separation, increased mixing difficulty, poor thermodynamic compatibility, poor physical properties, etc., and achieve the promotion of compatibility, distribution The effect of uniform and excellent mechanical properties

Inactive Publication Date: 2013-08-21
QINGDAO UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

However, due to the poor thermodynamic compatibility between chlorinated polyethylene and unsaturated rubber, when the proportion of chlorinated polyethylene in the blend is relatively high, it will easily lead to phase separation of the two rubber components and increase the difficulty of mixing. Large, resulting in many poor physical properties, little practical value

Method used

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  • Rubber composition of chemically modified chlorinated polyethylene and unsaturated rubber and preparation method thereof

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Embodiment 1

[0023] The preparation of the chlorinated polyethylene of embodiment 1 chemical modification

[0024] The chlorinated polyethylene of described chemical modification can be prepared according to the following method: the organic solvent of 600 weight parts, the chlorinated polyethylene of 60 weight parts are put into reactor (reflux condenser and mechanical stirring paddle are housed), in Stir continuously in a constant temperature heating bath at 50°C until the chlorinated polyethylene powder is uniformly dispersed in the solvent, at which point the chlorinated polyethylene reaches a partially swollen and partially dissolved state in the organic solvent. Then, 2 parts by weight of sodium N,N-diethyldithiocarbamate was dissolved in 50 parts by weight of dimethylformamide, and added dropwise into the reactor within 30 minutes, protected from light and continued to stir and heat for 24 hours. The reaction mixture is poured into 1000 parts by weight of distilled water to precipit...

Embodiment 2

[0026] The formula of each component of the material is: 60 parts of chemically modified chlorinated polyethylene, 50 parts of natural rubber, 3 parts of sulfur and 3 parts of dicumyl peroxide as vulcanizing agent, 50 parts of carbon black as filling and strengthening agent, The plasticizer uses 5 parts of naphthenic oil and 5 parts of dioctyl phthalate, and the stabilizer uses 10 parts of magnesium oxide and 5 parts of lead stearate.

[0027] Preparation method: first mix the weighed chemically modified chlorinated polyethylene and natural rubber in an internal mixer at 90°C for 3 to 4 minutes; then add the weighed filling reinforcing agent and plasticizer in sequence , stabilizer and vulcanizing agent, and then knead for 3 to 5 minutes. When the mixing temperature reaches 100-105 ° C, discharge the mixed rubber from the internal mixer, and then pass the mixed rubber on the open mixer for 2 to 3 minutes. Second-rate. Then vulcanized at 150°C for 25 minutes. The properties o...

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Abstract

The invention discloses a rubber composition of chemically modified chlorinated polyethylene and unsaturated rubber and a preparation method thereof. The rubber composition comprises the following components in parts by weight: 40-80 parts of chemically modified chlorinated polyethylene, 20-60 parts of natural rubber, 1-10 parts of vulcanization system, 10-50 parts of filling reinforcing agent, 5-20 parts of plasticizer and 10-30 parts of stabilizer. The rubber composition of the chemically modified chlorinated polyethylene and the unsaturated rubber has good miscibility and excellent mechanical properties.

Description

technical field [0001] The invention relates to a rubber composition of chemically modified chlorinated polyethylene and unsaturated rubber, and a preparation method thereof. Background technique [0002] Chlorinated polyethylene is a saturated chlorine-containing rubber. From the chemical structure, it has both non-polar unchlorinated polyethylene segments and chlorinated polar segments. It has excellent performance in oil resistance, ozone resistance, heat aging resistance, corrosion resistance, flame resistance and weather resistance, and is inexpensive. A serious disadvantage of unsaturated rubber such as styrene-butadiene rubber, ethylene-propylene rubber, and natural rubber is that it is not resistant to aging, and some non-polar unsaturated rubbers have poor oil resistance, low oxygen index and are easy to burn. Therefore, the development of blended vulcanizates of chlorinated polyethylene and unsaturated rubber can not only reduce the cost, but also improve the oil ...

Claims

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Application Information

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IPC IPC(8): C08L23/32C08L7/00C08K13/02C08K3/04C08K3/36C08K3/26C08K3/34C08J3/24C08F10/02C08F8/34
Inventor 陶勇杨文君
Owner QINGDAO UNIV OF SCI & TECH
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