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Cross-linked rubber composition, application thereof, rubber grains prepared by cross-linked rubber composition, preparation method and injection method of rubber grains

A technology of rubber composition and rubber particles, applied in application, clothing, clothing and other directions, can solve the problems of difficult heat transfer, inability to meet high performance requirements, poor material fluidity, etc., to achieve easy control of vulcanization speed, easy desulfurization and recycling. , the effect of good mechanical properties

Inactive Publication Date: 2010-01-13
陈友明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high molecular weight and poor material fluidity of various traditional rubber materials, they can only be formed by compression molding. At the same time, in the rubber vulcanization process, in order to improve the uniformity of mold temperature, steam heating is used. This process requires complex and expensive equipment. High pressure boiler equipment, equipment investment is large, energy consumption is high
The molecular weight of traditional rubber is high, and the molecular entanglement is serious, resulting in a large amount of heat generated during the kneading or banburying process, and the heat is not easily transmitted, which makes the rubber easy to partially vulcanize, resulting in defects in the molded product
At the same time, the traditional sulfur vulcanized rubber can be self-vulcanized due to a slightly higher ambient temperature, so it cannot be stored for a long time. If it is to be stored for a long time, it must be placed in a low temperature environment
Because of the various shortcomings of traditional rubber, thermoplastic elastomers have been produced, the most important of which is styrene-based elastomers. This type of elastomer can be injection molded, the processing technology is simple, and it can be recycled, so it has been fully developed. However, since this type of elastomer only maintains mechanical properties through physical crosslinking points, it cannot meet certain high-performance requirements (such as high wear resistance and high tear strength).
At the same time, it is difficult for styrene-based thermoplastic elastomers to be chemically cross-linked effectively, because styrene-based thermoplastic elastomers are block copolymers, and the cross-linking difficulty of each segment is different, resulting in uneven cross-linking

Method used

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  • Cross-linked rubber composition, application thereof, rubber grains prepared by cross-linked rubber composition, preparation method and injection method of rubber grains
  • Cross-linked rubber composition, application thereof, rubber grains prepared by cross-linked rubber composition, preparation method and injection method of rubber grains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The first method of preparing rubber granules:

[0052] Prepare rubber granules according to the following components and content (parts by mass):

[0053] Styrene-butadiene copolymer 70 parts

[0054] Styrene-ethylene-butylene-styrene block copolymer 10 parts

[0055] Naphthenic oil 19.9 parts

[0056] Dicumyl peroxide 0.1 parts

[0057] The preparation steps are as follows: first, put the styrene-butadiene copolymer, styrene-ethylene-butylene-styrene block copolymer, and naphthenic oil in the above ratio into an internal mixer for internal mixing, and mix for 10 minutes , and then add dicumyl peroxide, mix for 3 minutes, the temperature of the internal mixer is 100°C, mix the rubber material after internal mixing with an open mixer, thin pass twice and then release the tablet. Finally, the rubber material was extruded and granulated with an extruder, and the temperature of the extruder was 70° C., and the rubber granules of the first embodiment were made into pell...

Embodiment 2

[0059] The second method of preparing rubber particles:

[0060] Prepare according to the components and content (parts by mass) of the following proportioning ratio:

[0061] Styrene-butadiene copolymer 40 parts

[0062] Styrene-ethylene-butylene-styrene block copolymer 20 parts

[0063] 20 parts recycled rubber

[0064] Aromatic oil 19.5 parts

[0065] Dicumyl peroxide 0.5 parts

[0066] The preparation steps are as follows: first, put the styrene-ethylene-butylene-styrene block copolymer and aromatic oil in the above-mentioned ratio into an internal mixer and banbury, mix for 5 minutes, and then add the styrene-butadiene copolymer 1. Regenerated rubber, mixed for 10 minutes, then added dicumyl peroxide, mixed for 5 minutes, the temperature of the internal mixer was 80°C, mixed the rubber material after internal mixing with an open mixer, and then passed through for 5 times before the tablet was released. Finally, the rubber material was extruded and granulated by an ex...

Embodiment 3

[0068] The third method for preparing rubber particles:

[0069] Prepare according to the following components and content (51 parts by weight):

[0070] 60 parts of styrene-butadiene copolymer

[0071] Styrene-ethylene-butylene-styrene block copolymer 10 parts

[0072] Regenerated PP 10 parts

[0073] Naphthenic oil 19 parts

[0074] 1 part dicumyl peroxide

[0075] The preparation steps are as follows: first, put the styrene-butadiene copolymer, styrene-ethylene-butylene-styrene block copolymer, regenerated PP, and naphthenic oil in the above-mentioned ratio into an internal mixer for internal mixing, Mix for 20 minutes, the temperature of the internal mixer is 160°C, use the open mixer to form the rubber material after internal mixing into sheets, add dicumyl peroxide, and pass through it for 30 times, and then release the sheet. Finally, the rubber material was extruded and granulated by an extruder, and the temperature of the extruder was 110° C., and the rubber gran...

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Abstract

The invention relates to a cross-linked rubber composition, the application thereof, rubber grains prepared by the cross-linked rubber composition, a preparation method and an injection molding method of the rubber grains. The cross-linked rubber composition at least comprises a styrene-butadiene copolymer, a rubber softening agent, a flow modifying agent and a peroxide vulcanizing agent; the cross-linked rubber composition is suitable for preparing rubber products and can be prepared into non-cross-linked rubber grains below the temperature of 80 DEG C; and the rubber grains are formed by banburying, milling, extruding and granulating. The rubber composition and the rubber grains can be directly molded by injection, have good flow property, can be vulcanized in a later period and can be preserved at room temperature. Compared with the prior art, the rubber grains can be directly molded by injection, rubber particles are not easy to self-vulcanize, the vulcanization speed is easy to control, the rubber grains have no need to be stored at low temperature, and the like.

Description

technical field [0001] The invention relates to a rubber composition, in particular to a vulcanizable rubber composition which can be stored at room temperature for a long time and rubber particles made thereof, belonging to the technical field of rubber manufacturing. Background technique [0002] Rubber is an important polymer elastomer material, which is widely used in various products, such as tires, shoe soles, sealing rings, and various protective equipment. The materials used in various products should have good wear resistance, bending resistance, water and oil resistance, heat and cold resistance, high elasticity, high tear strength, low cost, and complicated processing and molding technology. Various rubber products are mainly used in combination with the following rubber materials: natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, neoprene rubber, EPDM rubber, etc. Due to the high molecular weight and poor material fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/10C08L53/02C08L53/00C08K5/01C08K5/14C08L17/00C08L23/12A41D3/04A43B1/10A43B13/04B29B7/28B29B9/06B29C47/92B29B13/02B29C45/00B29C35/02B29C48/92
CPCB29C47/0011B29C45/0001C08L53/02C08L23/10B29C47/0004C08L53/025C08K5/01C08L23/0853B29B9/12C08L2205/03C08L9/06C08L25/10C08L23/04C08L17/00B29C2947/92704B29B9/06B29C47/0066B29C47/92C08K5/14B29C48/92B29C2948/92704B29C48/022B29C48/04B29C48/0022C08L2666/02C08L2666/24
Inventor 叶孙勇付顺超黄进忠邱孝林
Owner 陈友明
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