Rubber composition of low-temperature resistant environmentally-friendly chlorinated polyethylene and preparation method thereof

A technology of chlorinated polyethylene and rubber composition, which is applied to the rubber composition and its production with oil resistance and environmental protection requirements. Extrusion performance, good oil resistance, and the effect of improving vulcanization speed

Inactive Publication Date: 2016-03-09
NANJING ORIENTLEADER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims at the disadvantages of high price and poor storage stability of the raw material neoprene used in oil-resistant automobile rubber hoses, as well as the problems of poor low temperature resistance, slow vulcanization speed, low vulcanization degree and non-environmental protection of existing chlorinated polyethylene, Proposed a low temperature resistant environment-friendly chlorinated polyethylene rubber composition and its preparation method

Method used

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Experimental program
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Effect test

preparation example Construction

[0025] A kind of preparation method of the rubber composition of the environment-friendly type chlorinated polyethylene of low temperature resistance as claimed in claim 1, comprises the following steps:

[0026] Put chlorinated polyethylene rubber, anti-aging agent RD, calcium stearate, and light magnesium oxide into an internal mixer according to parts by weight and knead for 2 to 3 minutes, then mix carbon black, plasticizer creatE2, inorganic filler , paraffin wax, and polyethylene wax are added to the internal mixer for 2 to 3 minutes, then add plasticizer and vulcanizing agent in turn, and continue kneading for 3 to 4 minutes. Thin pass 3 times on the mill, and then make 6 triangular bags and 6 rolls to obtain a low temperature resistant and environmentally friendly chlorinated polyethylene compound rubber.

[0027] Vulcanization temperature: 140-170°C, vulcanization time: 20-60 minutes.

specific Embodiment 1

[0028] Chlorinated polyethylene CM352LF, product of Hangzhou Keli Chemical Co., Ltd., 100 parts; 30 parts of quick extruded carbon black; plasticizer creatE2, 20 parts; inorganic filler, 30 parts of light calcium; 10 parts of light magnesium oxide; 5 parts of calcium fatty acid; 1 part of paraffin wax; 3 parts of polyethylene wax; 3 parts of anti-aging agent RD; 15 parts of plasticizer TOTM; 15 parts of plasticizer DOS; EataVulcPT75, 3 parts;

[0029] The main properties of rubber: hardness: 70, tensile strength: 12.0Mpa, elongation at break: 343%, hot air aging (100℃*72h): hardness change: 3; tensile strength change rate: 7.0%; Elongation change rate: -12.5%;

[0030] Resistant to 3# oil (120°C*72h): hardness change: -28, tensile strength change rate: -17.2%; elongation at break change rate: -37.3%; volume change rate: 45.3%.

[0031] Low-temperature brittleness temperature: -38°C: Ozone resistance (100pphm*20%*72h, 40±2°C): no cracks.

Embodiment 2

[0033] Chlorinated polyethylene CM352LF, product of Hangzhou Keli Chemical Co., Ltd., 100 parts; 40 parts of quick extruded carbon black; plasticizer creatE2, 30 parts; inorganic filler, 20 parts of light calcium; 15 parts of light magnesium oxide; 5 parts of calcium fatty acid; 2 parts of paraffin wax; 2 parts of polyethylene wax; 1 part of anti-aging agent RD; 30 parts of plasticizer DOS; 2 parts of EataVulcPT75;

[0034] The main properties of rubber: hardness: 71; tensile strength: 11.2Mpa; elongation at break: 294%; hot air aging (100℃*72h): hardness change: 7; tensile strength change rate: 7.8%; Rate of change in elongation: -12.6% Resistance to 3# oil (120°C*72h): Change in hardness: -24; rate of change in tensile strength: -24.5%; rate of change in elongation at break: -42.0%; rate of volume change : 39.8%; low temperature brittleness: -43°C.

[0035] Ozone resistance (100pphm*20%*72h, 40±2℃): no cracks.

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Abstract

The present invention relates to a rubber composition of low-temperature resistant environmentally-friendly chlorinated polyethylene. The rubber composition comprises the following raw materials in parts by weight: 100 parts of chlorinated polyethylene; 5-40 parts of carbon black; 10-130 parts of a plasticizer creat E2; 30-60 parts of an inorganic filler; 5-20 parts of light magnesium oxide; 2-10 parts of calcium stearate; 1-3 parts of paraffin wax; 3-5 parts of polyethylene wax; 1-3 parts of an antioxidant RD; 10-40 parts of a plasticizer; 1-4 parts of a vulcanizing agent EataVulc PT75; and 1-4 parts of a promoter EataAccel 903. Compared with a traditional CPE formula, all the raw materials in the present invention are environmentally friendly, and satisfy ROHS and REACH requirements; and a novel thiadiazole vulcanizing agent PT-75 and a promoter 903 are used, so that the vulcanization rate is significantly improved, and vulcanization can be performed on CPE at a lower temperature.

Description

technical field [0001] The invention relates to a low-temperature-resistant environment-friendly chlorinated polyethylene rubber composition and a preparation method thereof, in particular to a rubber composition with low-temperature resistance, oil resistance and environmental protection requirements manufactured by an extrusion process and a production method thereof. Background technique [0002] Neoprene has better oil resistance, weather resistance and ozone resistance, and is widely used in automotive hoses. However, the cost of neoprene is relatively high, and its storage stability is poor, and scorching often occurs during storage, which makes the mixed rubber unusable. Oil-resistant automotive hoses have a large demand for oil-resistant rubber, so it is urgent to find a low-cost oil-resistant rubber to replace neoprene. [0003] Chlorinated polyethylene is made of polyethylene through chlorination reaction, the molecular chain is saturated and does not contain doub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/28C08L23/06C08L91/06C08K13/02C08K3/04C08K3/26C08K3/22C08K5/098C08K5/47C08K3/34
CPCC08L23/286C08K2201/014C08L2203/18C08L2205/03C08L2205/035C08L2312/00C08L23/06C08L91/06C08K13/02C08K3/04C08K2003/265C08K2003/222C08K5/098C08K5/47C08K3/34C08K3/346
Inventor 鞠建宏王春明王亮燕邹惠芳陶平
Owner NANJING ORIENTLEADER TECH CO LTD
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