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Rubber composition and processing method, and rubber hose using same and production method

A technology of rubber composition and rubber hose, which is applied in the field of rubber, can solve problems such as difficult free radical reaction, large steric hindrance, and difficult cross-linking, so as to reduce the probability of tearing, high tensile strength and tear performance, and meet the requirements of The effect of high temperature resistance requirements

Active Publication Date: 2021-06-22
HANGZHOU XINGLU TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Rubber generally needs to be cross-linked before use. Among the commonly used cross-linking methods for ethylene-propylene rubber, peroxide cross-linking or radiation cross-linking are suitable for ethylene-α-olefin copolymers. Both are mainly through the capture of tertiary carbons. Hydrogen atoms form tertiary carbon radicals, and then form carbon-carbon crosslinks through free radicals, but the copolymer of ethylene and 1-octene (hereinafter referred to as POE) has fewer tertiary carbon atoms, and the branch connected to the tertiary carbon atoms Chain length, large steric hindrance, difficult free radical reaction, resulting in difficulty in crosslinking, affecting processing efficiency and product performance, such as unsatisfactory compression set resistance

Method used

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  • Rubber composition and processing method, and rubber hose using same and production method
  • Rubber composition and processing method, and rubber hose using same and production method
  • Rubber composition and processing method, and rubber hose using same and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] The number of branched polyethylene used is PER-7.

[0081] The processing steps are as follows:

[0082] (1) Rubber mixing: set the temperature of the internal mixer to 100°C, and the rotor speed to 50 rpm, add 90 parts of EPDM rubber and 10 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 2 parts of PEG4000 , 1 part of anti-aging agent RD, mixing for 30 seconds; then adding 80 parts of carbon black N550, 20 parts of paraffin oil SUNPAR2280 in the rubber compound, mixing for 3 minutes; finally adding 3 parts of crosslinking agent dicumyl peroxide (DCP ), 1 part of co-crosslinking agent triallyl isocyanurate (TAIC), after mixing for 2 minutes, remove the glue. Thinly pass the mixed rubber on an open mill with a roller temperature of 60°C to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours;

[0083] (2) Perform various tests after parking for 16 hours after vulcanization.

Embodiment 2

[0085] The number of branched polyethylene used is PER-6.

[0086] The processing steps are as follows:

[0087] (1) Rubber mixing: set the temperature of the internal mixer to 90°C, and the rotor speed to 50 rpm, add 85 parts of EPDM rubber and 15 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 2 parts of PEG4000 , 1 part of anti-aging agent RD, mixed for 30 seconds; then added 80 parts of carbon black N550, 30 parts of paraffin oil SUNPAR2280 in the rubber compound, mixed for 3 minutes; finally added 3 parts of crosslinking agent dicumyl peroxide (DCP ), 1 part of cross-linking agent triallyl isocyanurate (TAIC), after mixing for 2 minutes, discharge the rubber, and pass the mixed rubber on the open mill with a roller temperature of 60 ° C to obtain a thickness of about 2.5mm Thin slices, park for 20 hours;

[0088] (2) Perform various tests after parking for 16 hours after vulcanization.

Embodiment 3

[0090] The branched polyethylene number used is PER-4.

[0091] The processing steps are as follows:

[0092] (1) Rubber mixing: set the temperature of the internal mixer to 70°C, and the rotor speed to 50 rpm, add 70 parts of EPDM rubber and 30 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 2 parts of PEG4000 , 1 part of anti-aging agent RD, mixed for 30 seconds; then added 80 parts of carbon black N550, 30 parts of paraffin oil SUNPAR2280 in the rubber compound, mixed for 3 minutes; finally added 3 parts of crosslinking agent dicumyl peroxide (DCP ), 1 part of co-crosslinking agent triallyl isocyanurate (TAIC), after mixing for 2 minutes, remove the glue. Thinly pass the mixed rubber on an open mill with a roller temperature of 60°C to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours;

[0093] (2) Perform various tests after parking for 16 hours after vulcanization.

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Abstract

The invention discloses a rubber composition and a method for processing the rubber composition, as well as a rubber hose containing the rubber composition and a production method. The rubber composition is calculated in parts by weight, and includes: 100 parts of a rubber matrix, a crosslinking agent 1.5-8 parts, 50-200 parts of reinforcing filler, 10-100 parts of plasticizer, which also includes 0.2-8 parts of auxiliary crosslinking agent, 2-15 parts of metal oxide, 1-3 parts of stabilizer, polymer 1 to 5 parts of ethylene glycol, wherein the rubber matrix is ​​based on 100 parts by weight, including: the content of branched polyethylene is a: 0<a≤100 parts, and the content of binary ethylene-propylene rubber is b: 0≤b< 100 parts; the content c of EPDM rubber: 0≦c<100 parts, the beneficial effect is that the rubber composition provided by the invention can produce a rubber hose with good mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a rubber composition and a processing method for obtaining the rubber composition. The invention also relates to a rubber hose using the rubber composition and a production method of the product. Background technique [0002] Ethylene-propylene rubber is widely used in the field of hoses. As some hose applications (such as automobile radiator hoses and brake hoses) have higher and higher requirements for heat resistance and compression set resistance, the hose vulcanization process has changed from the original Sulfur vulcanization gradually tends to use peroxide vulcanization to obtain better heat resistance and compression set resistance. However, the tear strength of rubber after peroxide vulcanization is lower than that of sulfur vulcanization, which will cause more waste products in the production process of rubber hoses, reduce production efficiency and increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/06C08L71/02C08L91/06C08K13/02C08K5/3437C08K3/04C08K5/14C08K5/3477B29C35/02B29C35/04B29B7/02B29C48/151B29L23/00
CPCC08L23/16B29B7/02B29C35/02B29C35/049B29C48/151C08L2203/18C08L2201/08C08L2205/035C08L2205/025B29L2023/005B29L2023/00C08L23/06C08L71/02C08L91/06C08K13/02C08K5/3437C08K3/04C08K5/14C08K5/3477C08L91/00C08K5/0016C08K5/0025C08K3/013B32B2250/40B32B25/16B32B5/026B32B2597/00B32B1/08B32B25/10B32B2250/03B32B2262/0269B32B2605/00C08L23/04C08K3/011B32B27/08B32B27/32B32B2250/02B32B2605/08C08K5/005C08L23/0815C08L23/14C08L2205/02C08L2205/03
Inventor 不公告发明人
Owner HANGZHOU XINGLU TECH CO LTD
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