Styrene-butadiene copolymer chemical foaming composition containing polystyrene micro-blocks, preparation method and application method thereof

A butadiene copolymer chemical and foaming composition technology, which is applied in the fields of application, clothing, footwear, etc., can solve the problems of high sole density, high melt viscosity, and low vulcanization temperature, and achieve convenient injection processing and low Effect of Melt Viscosity

Inactive Publication Date: 2010-06-23
浙江仕峰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the above defects of SBS foam shoe material, the sole made of SBS has high density and poor wear resistance. Therefore, it has been gradually replaced by other foamable lightweight materials such as EVA and polyurethane (PU) in recent years.
[0007] The tensile strength, tear strength, compression set, wear resistance, and anti-slip properties of EVA foam products currently used are more plastic properties, which cannot fully meet the requirements of the shoe industry.
Although polyurethane has excellent wear resistance, there are also disadvantages in polyurethane foaming materials for shoe soles, such as high investment in thermosetting polyurethane equipment, high toxicity of polyurethane monomer, and complicated foaming process, etc.
The basic materials used in this patent are styrene-butadiene rubber, natural rubber and butadiene rubber. The molecular weight of these materials is too large, resulting in high melt viscosity of the material, which cannot be processed by injection
At the same time, the patent adopts sulfur vulcanization system, the vulcanization temperature is low, and crosslinking is easy to occur in the screw of the injection machine, and this formula system cannot be processed by injection.

Method used

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  • Styrene-butadiene copolymer chemical foaming composition containing polystyrene micro-blocks, preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] According to the following components and content (parts by mass)

[0063] Styrene-butadiene copolymer 50 parts

[0064] Butadiene rubber 10 parts

[0065] Styrene-butadiene-styrene copolymer 5 parts

[0066] Silicon dioxide 14 parts

[0067] 10 parts recycled rubber

[0068] 10 parts naphthenic oil

[0069] Dicumyl peroxide 0.4 parts

[0070] Triallyl isocyanurate 0.3 parts

[0071] Azodicarbonamide 0.3 parts

[0072] First, put the styrene-butadiene copolymer, styrene-butadiene-styrene copolymer, butadiene rubber, silicon dioxide, regenerated rubber, and naphthenic oil in the internal mixer at the same time for internal mixing , and mix for 5 minutes. Then add dicumyl peroxide, triallyl isocyanurate, and azodicarbonamide, mix for 2 minutes, the temperature of the internal mixer is 100°C, and mix the rubber materials after internal mixing with an open mixer. After 10 thin passes, the film was removed. Finally, the rubber material is extruded and granulated by...

Embodiment 2

[0074] According to the following components and content (parts by mass)

[0075] Styrene-butadiene copolymer 40 parts

[0076] EPDM rubber 10 parts

[0077] Ethylene-vinyl acetate copolymer 15 parts

[0078] Talcum powder 13.5 parts

[0079] Regenerated EVA powder 10 parts

[0080] Machine oil 10 parts

[0081] 0.2 parts of tert-butylcumyl peroxide

[0082] Trimethylolpropane tris(2-methacrylate) 0.3 parts

[0083] Azodicarbonamide 1 part

[0084] First, put the styrene-butadiene copolymer, ethylene-vinyl acetate copolymer, EPDM rubber, talc powder, recycled EVA powder, and mechanical oil in the internal mixer at the same time for internal mixing, and mix for 5 minutes . Then add tert-butyl cumyl peroxide, trimethylolpropane tris (2-methacrylate) ester, and azodicarbonamide, mix for 2 minutes, and the temperature of the internal mixer is 100°C, and the rubber compound after internal mixing is used Mix in a mill, and pass through 10 times before the next tablet. Fina...

Embodiment 3

[0086] According to the following components and content (parts by mass)

[0087] Styrene-butadiene copolymer 49 parts

[0088] 10 parts nitrile rubber

[0089] Styrene-ethylene-propylene-styrene copolymer 5 parts

[0090] Silicon dioxide 13.5 parts

[0091] 10 parts recycled rubber powder

[0092] Aromatic oil 10 parts

[0093] 0.2 parts of tert-butylcumyl peroxide

[0094] Trimethylolpropane tris(2-methacrylate) 0.3 parts

[0095] Azodicarbonamide 2 parts

[0096] First, put the styrene-ethylene-propylene-styrene copolymer and aromatic oil in the above ratio into an internal mixer for internal mixing, mix for 3 minutes, then add styrene-butadiene copolymer, nitrile rubber, dioxide Silicone, recycled rubber powder, mix for 8 minutes, then add tert-butyl cumyl peroxide, trimethylolpropane tris (2-methacrylate) ester, azodicarbonamide, mix for 2 minutes, internal mixer temperature 100 ℃, mix the rubber materials after banburying with an open mill, pass through 10 times, a...

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Abstract

The invention discloses a styrene-butadiene copolymer chemical foaming composition containing polystyrene micro-blocks, a preparation method and an application method thereof. The preparation method takes styrene-butadiene copolymer mixing random structure with block structure as base material, and adds flow modifier or softener to regulate the fluidity of rubber. Rubber compositions manufactured by the method have good fluidity and can be molded directly through injection. Chemical foaming agents added reduces product density and effectively achieves the aim of obtaining lightweight material. Post partial chemical crosslinking can be performed so as to improve the stress cracking resistance and wear resistance of the material. Meanwhile, as the partial physical crosslinking of the styrene-butadiene copolymer allows the material to overcome the defect that all-chemical crosslinked rubber cannot be regenerated, the material can be recycled and regenerated.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a styrene-butadiene copolymer composition, a preparation method and an application method. Background technique [0002] As we all know, styrene / butadiene block copolymer (SBS) is the earliest industrialized styrene monomer-based thermoplastic elastomer. SBS can be used, for example, in the preparation of shoe soles, adhesives, commodity elastomers, modified bitumen and plastics. The largest application field of SBS is shoe soles, and SBS for shoe soles accounts for more than 50% of the world's SBS consumption. [0003] Lightweight SBS shoe materials have always been the development direction of SBS shoe materials, and foaming is the most effective means of lightweight shoe materials. At present, the lightweight of SBS shoe materials mainly focuses on the chemical foaming of gas generated by the decomposition of chemical foaming agents (such as AC foaming agents) and the physi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L9/00C08L53/02C08L17/00C08L23/16C08L23/08C08L31/04C08L9/02C08L23/12C08J9/08C08J9/10B29B9/06B29B7/28B29C47/92B29C45/00B29C44/42A43B13/04
CPCY02P70/10
Inventor 张爱民林昌武龚建设梁红文
Owner 浙江仕峰实业有限公司
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