Chemically foamed thermoplastic elastomer (TPE) material and preparation method thereof

A chemical foaming and chemical foaming agent technology, applied in the field of polymer materials, can solve the problems of upper limit of use temperature, solvent resistance, poor oil resistance, large compression deformation and high density, and achieves good fluidity and reduced surface hardness. , The obvious effect of injection molding shrinkage

Inactive Publication Date: 2017-03-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although SEBS has excellent rubber elasticity, excellent weather resistance, low temperature resistance, environmental protection performance, etc., there are some problems in using SEBS alone as an elastomer material. For example, compared with traditional vulcanized rubber, SEBS has excessive rigidity and compression. Disadvantages such as large deformation and high density; its upper temperature limit, solvent resistance, oil resistance, etc. are usually inferior to traditional vulcanized rubber, etc.

Method used

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  • Chemically foamed thermoplastic elastomer (TPE) material and preparation method thereof
  • Chemically foamed thermoplastic elastomer (TPE) material and preparation method thereof
  • Chemically foamed thermoplastic elastomer (TPE) material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a chemically foamed TPE material, comprising the steps of:

[0041] 1) according to the parts by weight of each raw material:

[0042]

[0043] Select hydrogenated styrene-butadiene-styrene block copolymer (SEBS), paraffin oil, polypropylene (PP), anti-scratch additives, antioxidants and chemical foaming agents for subsequent use;

[0044] 2) First mix hydrogenated styrene-butadiene-styrene block copolymer (SEBS, powder) and paraffin oil in a high-speed mixer at 500r / min for 5min, and then place it for 20min;

[0045] 3) Add polypropylene (PP), anti-scratch additives and antioxidants to the mixer in step 2) and mix at 1000r / min for 5min; obtain a premix;

[0046] 4) Add the premixed material obtained in step 3) into a twin-screw extruder to extrude and granulate, the extrusion temperature is 180-210°C, the head temperature is 200°C, and the masterbatch (non-foaming TPE material );

[0047] 5) Add the masterbatch and chemical foaming agent o...

Embodiment 2

[0052] A preparation method of a chemically foamed TPE material, comprising the steps of:

[0053] 1) according to the parts by weight of each raw material:

[0054]

[0055]

[0056] Select hydrogenated styrene-butadiene-styrene block copolymer (SEBS), paraffin oil, polypropylene (PP), anti-scratch additives, antioxidants and chemical foaming agents for subsequent use;

[0057] 2) First mix hydrogenated styrene-butadiene-styrene block copolymer (SEBS, powder) and paraffin oil in a high-speed mixer at 500r / min for 5min, and then place it for 20min;

[0058] 3) Add polypropylene (PP), anti-scratch additives and antioxidants to the mixer in step 2) and mix at 1000r / min for 5min; obtain a premix;

[0059] 4) Add the premixed material obtained in step 3) into a twin-screw extruder to extrude and granulate. The extrusion temperature is 180-210°C, and the head temperature is 200°C to obtain a non-foaming TPE material (masterbatch );

[0060] 5) Add the masterbatch and chemi...

Embodiment 3

[0065] A preparation method of a chemically foamed TPE material, comprising the steps of:

[0066] 1) according to the parts by weight of each raw material:

[0067]

[0068] Select hydrogenated styrene-butadiene-styrene block copolymer (SEBS), paraffin oil, polypropylene (PP), anti-scratch additives, antioxidants and chemical foaming agents for subsequent use;

[0069] 2) First mix hydrogenated styrene-butadiene-styrene block copolymer (SEBS, powder) and paraffin oil in a high-speed mixer at 500r / min for 5min, and then place it for 20min;

[0070] 3) Add polypropylene (PP), anti-scratch additives and antioxidants to the mixer in step 2) and mix at 1000r / min for 5min; obtain a premix;

[0071] 4) Add the premixed material obtained in step 3) into a twin-screw extruder to extrude and granulate. The extrusion temperature is 180-210°C, and the head temperature is 200°C to obtain a non-foaming TPE material (masterbatch );

[0072] 5) Add the masterbatch and chemical foaming ...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a chemically foamed thermoplastic elastomer (TPE) material and a preparation method thereof. The chemically foamed TPE material is characterized by being prepared from hydrogenated styrene-ethylene / butylene-styrene block copolymers (SEBS), paraffin oil, polypropylene (PP), scratch-resistant auxiliary agents, antioxidants and chemical foaming agents; and the raw materials comprise, by weight, 100 parts of hydrogenated SEBS, 120-140 parts of paraffin oil, 1-2 parts of scratch-resistant auxiliary agents, 0.4-0.6 part of antioxidants and 2-4 parts of chemical foaming agents. By adopting the chemically foamed TPE material, a shrink mark of the injection molded sample piece surface can be reduced, so that the hardness of the injection molded sample piece surface is reduced, a better sense of touch is obtained, the sense of touch is soft, and injection molding shrink is modified obviously.

Description

technical field [0001] The invention relates to the technical field of polymer materials, more specifically, the invention relates to a chemically foamed TPE material (thermoplastic elastomer material) and a preparation method thereof. Background technique [0002] Thermoplastic Elastomer TPE (Thermoplastic Elastomer) is a material that has the high elasticity, high strength, and high resilience of rubber, and has the characteristics of injection molding. TPE is environmentally friendly, non-toxic and safe, has a wide range of hardness, excellent colorability, soft touch, weather resistance, fatigue resistance and temperature resistance, excellent processing performance, no vulcanization and many other advantages. Therefore, as a new type of multi-functional Environmentally friendly materials, TPE has a very broad application market, such as household appliances, sporting goods, automotive materials, medical equipment, construction and footwear, etc. At present, TPE materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L53/02C08L23/12C08L83/04C08K5/134C08K5/526C08J9/08
CPCC08J9/08C08J2323/12C08J2383/04C08J2391/06C08J2453/02C08L91/06C08L2203/14C08L2205/035C08L53/025C08L23/12C08L83/04C08K5/1345C08K5/526
Inventor 王辉柏秋阳冯陈泽芳
Owner WUHAN UNIV OF TECH
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