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
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[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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