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Rubber composition and processing method, and seal using same and production method

A technology of rubber composition and sealing strip, which is applied in the field of rubber, and can solve problems such as narrow molecular weight distribution of branched polyethylene, no new type of rubber disclosed, and inability to meet process requirements well.

Active Publication Date: 2021-04-06
HANGZHOU XINGLU TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application No. 201410200113.6 discloses a polyethylene rubber and its processing method. The specific content disclosed is the raw material formula and processing method of polyethylene rubber, but it does not disclose the new type of rubber obtained by using this rubber as a rubber matrix. , and a method for making a seal using the novel rubber
The formula disclosed in this patent cannot well meet the technological requirements of the seals processed by rapid extrusion
And the glue content is higher, the cost is higher
[0010] At present, there is no public report on the application of branched polyethylene to the preparation of seals with good compression set resistance by taking advantage of the advantages of narrow molecular weight distribution

Method used

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  • Rubber composition and processing method, and seal using same and production method
  • Rubber composition and processing method, and seal using same and production method
  • Rubber composition and processing method, and seal using same and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The number of branched polyethylene used is PER-9.

[0085] The processing steps of the test rubber composition are as follows:

[0086] (1) Mixing: Set the temperature of the internal mixer to 80°C, 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 10 parts of zinc oxide , 1.5 parts of stearic acid, 5 parts of calcium oxide and 3 parts of PEG3400, mixed for 1 minute;

[0087] (2) Then add 120 parts of carbon black N550, 30 parts of calcium carbonate, and 90 parts of paraffin oil SUNPAR2280 into the rubber compound, and mix for 3 minutes;

[0088] (3) Finally, add 4 parts of cross-linking agent dicumyl peroxide (DCP), 1.5 parts of auxiliary cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of sulfur, mix for 2 minutes and then remove the glue .

[0089] (4) Thinly pass the mixed rubber on an open mill with a roller temperature of 60°C to obtain a thin sheet with a t...

Embodiment 2

[0092] The number of branched polyethylene used is PER-8.

[0093] The processing steps of the test rubber composition are as follows:

[0094] (1) Mixing: Set the temperature of the internal mixer to 80°C, the rotor speed to 50 rpm, add 20 parts of EPDM rubber, 50 parts of EPDM rubber and 30 parts of branched polyethylene for pre-compression mixing 90 seconds; add 15 parts of zinc oxide, 2 parts of stearic acid, 10 parts of calcium oxide and 3 parts of PEG3400, and knead for 1 minute;

[0095] (2) Then add 120 parts of carbon black N550, 30 parts of calcium carbonate, and 80 parts of paraffin oil SUNPAR2280 into the rubber compound, and mix for 3 minutes;

[0096] (3) Finally, add 4 parts of cross-linking agent dicumyl peroxide (DCP), 1.5 parts of auxiliary cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of sulfur, mix for 2 minutes and then remove the glue ;

[0097] (4) Thinly pass the mixed rubber on an open mill with a roller temperature of 60°C to obtain ...

Embodiment 3

[0100] The number of branched polyethylene used is PER-5.

[0101] The processing steps of the test rubber composition are as follows:

[0102] (1) Mixing: Set the temperature of the internal mixer to 80°C, the rotor speed to 50 rpm, add 50 parts of EPDM rubber and 50 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 5 parts of zinc oxide , 1.5 parts of stearic acid, 5 parts of calcium oxide and 3 parts of PEG3400, mixed for 1 minute;

[0103] (2) Then add 120 parts of carbon black N550, 30 parts of calcium carbonate, and 80 parts of paraffin oil SUNPAR2280 into the rubber compound, and mix for 3 minutes;

[0104] (3) Finally, add 4 parts of cross-linking agent dicumyl peroxide (DCP), 1.5 parts of auxiliary cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of sulfur, mix for 2 minutes and then remove the glue ;

[0105] (4) Thinly pass the mixed rubber on an open mill with a roller temperature of 60°C to obtain a sheet with a thickne...

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Abstract

The invention discloses a rubber composition, a method for processing the rubber composition, a sealing strip containing the rubber composition, and a production method thereof. The components of the rubber composition are calculated in parts by weight, and include: a rubber matrix 100 parts, 2 to 20 parts of cross-linking system, 60 to 300 parts of reinforcing filler, 20 to 170 parts of plasticizer, 3 to 25 parts of metal oxide, wherein the rubber matrix contains by mass parts: branched polyethylene The content is a: 0<a≤100 parts, the content b of EPDM rubber: 0≤b<100 parts, and the content c of EPDM rubber: 0≤c<100 parts. The technical effect of the present invention is to provide a sealing member with good compression set resistance.

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 thereof, and also relates to a seal using the rubber composition and a method for producing the seal. Background technique [0002] The application of rubber seals generally requires that the products have good aging resistance and low compression set, so as to obtain long-term reliable sealing performance. At present, many sealing products are made of ethylene-propylene rubber. Compared with the sulfur vulcanization system, the peroxide crosslinking system can obtain rubber products with better aging resistance and lower compression set, but the mechanical strength of the products obtained by peroxide crosslinking is generally weaker than that of sulfur vulcanization products , which will cause the product to be prone to damage such as breakage or tearing during production and use. [0003] How to simultaneously improve th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/06C08L91/06C08K13/02C08K3/22C08K5/09C08K3/04
CPCC08L23/06C08L23/16C08L2205/035C08L2205/03C08L2205/025C08K2003/2296C08K2003/2206C08L91/06C08K13/02C08K3/22C08K5/09C08K3/04C08K5/0016C08K3/013C08K5/14C08K2003/222C08K2201/014C08K2003/265C08L23/04C08L71/02C08K3/26C08L91/00C08K3/06C08K3/011B29D99/0053B60S1/04C08K3/346C08K5/0025C08K5/005C08K5/34924C08K2003/2217C08L23/08
Inventor 不公告发明人
Owner HANGZHOU XINGLU TECH CO LTD
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