Mico-crosslinking thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer, micro-crosslinking technology, applied in the field of polymer materials, can solve the problems of poor mechanical strength, weak intermolecular force, poor heat resistance of thermoplastic materials, etc., to reduce density, enhance chemical force, and reduce vulcanization. effect of temperature

Active Publication Date: 2015-02-18
MAOTAI FUJIAN SOLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak intermolecular force in the molding material, there is no network three-dimensional crosslinking structure, resulting in poor heat resistance and poor mechanical strength of thermoplastic materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, a slightly crosslinked thermoplastic elastomer consists of the following components:

[0048] SBS YH-792 50 parts

[0049] Butadiene rubber BR 9000 15 parts

[0050] 16 parts white mineral oil

[0051] Foaming agent 0.3 parts

[0052] Cross-linking agent DCP 0.35 part

[0053] Antioxidant 1076 0.2 parts

[0054] Light stabilizer UV-531 0.2 parts

[0055] Zinc oxide 0.4 parts

[0056] Zinc stearate 1.3 parts

[0057] Anti-wear agent FY-500 4.0 parts

[0058] Nano calcium carbonate 10 parts.

[0059] Put the above component materials into the internal mixer for 12 minutes, control the discharge temperature to 131 degrees, and then press them into uniform sheets through the double-roller open mill, and finally cut the materials into the specified size and put them into a large vulcanizing machine Taichung vulcanization molding, control vulcanization temperature 174 degrees, vulcanization time 240 seconds, to obtain micro-crosslinked thermoplast...

Embodiment 2

[0062] In this example, the preparation method of a slightly cross-linked thermoplastic elastomer is basically the same as the preparation method in Example 1, the difference is:

[0063] 50 parts of SEBS YH-503, 12 parts of isoprene rubber, 23 parts of white mineral oil, 0.4 parts of foaming agent, 0.3 parts of crosslinking agent BIBP;

[0064] The vulcanization temperature is 172 degrees, and the vulcanization time is 280 seconds.

[0065] The micro-crosslinked thermoplastic elastomer prepared above has a density of 0.78 g / cm 3 , DIN wear-resistant 107 mm 3 , Shore hardness 51 degrees, dimensional shrinkage 0.41%, tear strength 24N / mm, tensile strength 4.6MPa, folding resistance 60,000 times without cracks, anti-slip coefficient smooth dry 0.98 wet 0.53.

Embodiment 3

[0067] In this example, the preparation method of a slightly cross-linked thermoplastic elastomer is basically the same as the preparation method in Example 1, the difference is:

[0068] 50 parts of SIS YH-1225, 18 parts of isoprene rubber, 30 parts of white mineral oil, 15 parts of nano calcium carbonate;

[0069] Banburying for 10 minutes, controlling the discharge temperature to 130 degrees, controlling the vulcanization temperature to 175 degrees, and the vulcanization time to 210 seconds.

[0070] The micro-crosslinked thermoplastic elastomer prepared above has a density of 0.83 g / cm 3 , DIN wear-resistant 99 mm 3 , Shore hardness 53 degrees, dimensional shrinkage 0.30%, tear strength 31N / mm, tensile strength 4.5MPa, folding resistance 60,000 times without cracks, anti-slip coefficient smooth dry 0.87 wet 0.51.

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Abstract

The invention relates to the technical field of high-molecular materials, and provides a mico-crosslinking thermoplastic elastomer and a preparation method thereof. The mico-crosslinking thermoplastic elastomer comprises the following components: a styrene type thermoplastic elastomer, synthetic rubber, white mineral oil, a foaming agent, a crosslinking agent, an antioxidant, a light stabilizer, zinc oxide, zinc stearate, abrasion-resistant agent and nano calcium carbonate. The preparation method comprises the following steps: placing the component materials into an internal mixer, and carrying out internal mixing for 10-15 minutes; controlling discharge temperature at 130-135 DEG C; then pressing into a uniform flaky shape by virtue of a double-roller open mill for discharge; finally cutting a material into a specified dimension, placing into a large-flake vulcanizing machine, carrying out vulcanizing forming, and controlling vulcanizing temperature at 170-175 DEG C and vulcanizing time at 180-350 seconds so as to obtain the mico-crosslinking thermoplastic elastomer. The mico-crosslinking thermoplastic elastomer disclosed by the invention has the characteristics of low density, high abrasion resistance, uniformity in froth, good low temperature flexibility, dimensional stability and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a thermoplastic elastomer, in particular to a micro-crosslinked thermoplastic elastomer and a preparation method thereof. Background technique [0002] With the progress of the times, people's living standards are also improving, and the requirements for shoes are getting higher and higher. Ordinary thermoplastic TPR soles have large specificity, poor heat resistance, poor mechanical strength, and general elasticity and wear resistance. TPR soles, which have always been easy to process and low price as their main advantages, gradually lose their appeal and are gradually replaced by EVA and rubber soles. [0003] The resin molecular chains in thermoplastic materials are all linear or branched. There is no chemical bond between the molecular chains, and they soften and flow when heated. The process of cooling and hardening is a physical change. After repeated heating and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L9/00C08L9/06C08L23/16C08K13/02C08K5/01C08K5/098C08K5/14C08K3/22C08K3/26C08K3/06C08J9/14C08J9/04C08J3/24B29C35/02
Inventor 卢鑫丁思博罗显发郭彩莲周小兰廖毅彬张文飞於伟金校红
Owner MAOTAI FUJIAN SOLES CO LTD
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