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Thermoplastic vulcanizate elastomer composition and preparation method thereof

A rubber elastomer and thermoplastic vulcanization technology, which is applied in the field of thermoplastic vulcanized rubber elastomer composition and its preparation, can solve the problems of easy formation of mold scale, degradation of mechanical properties of materials, and influence on the service life of injection molded products, and achieve excellent surface effect, The production process is simple and easy, the effect of softness and comfortable hand feeling

Inactive Publication Date: 2015-07-01
SINOTEX INVESTMENT & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of addition helps to improve fluidity, but there are two disadvantages: 1. The mechanical properties of the material drop significantly; 2. It is easy to form mold scale during the injection molding process, which affects the surface of the injection molded product and the service life of the mold.

Method used

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  • Thermoplastic vulcanizate elastomer composition and preparation method thereof
  • Thermoplastic vulcanizate elastomer composition and preparation method thereof
  • Thermoplastic vulcanizate elastomer composition and preparation method thereof

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preparation example Construction

[0024] The preparation method of the thermoplastic vulcanizate elastomer composition improving fluidity of the present invention comprises the following steps:

[0025] (1) Fully mix the styrene-based thermoplastic elastomer and mineral oil;

[0026] (2) After the styrene-based thermoplastic elastomer has fully absorbed the oil, add EPDM rubber, polypropylene resin, mineral fillers, stabilizers such as antioxidants, processing aids, and vulcanizing agents, and mix them in a mixer Uniform;

[0027] (3) Send the homogeneously mixed materials in step (2) into a twin-screw extruder, and undergo twin-screw high-speed shearing, mixing, extrusion, stranding, cooling, and granulation.

[0028] It can be seen from the above technical solutions that the hardness of the thermoplastic elastomer provided by the present invention can be adjusted between 30A and 55D, and the material has good mechanical properties and excellent processability.

[0029] The production process of the thermop...

Embodiment

[0031] The present invention will be further described below in conjunction with embodiment.

[0032] The various raw materials in the embodiments can be purchased from related products of multiple manufacturers. The present invention lists the manufacturers of raw materials, but it should not be construed as a limitation of the present invention.

[0033] Among the following raw materials,

[0034] Dynamic vulcanization elastomer TPV, SANTOPRENE101-55,201-64, purchased from ExxonMobil;

[0035] EPDM rubber: NORDEL4770P, weight average molecular weight 200000, ENB mass content 4.9%; NORDEL4640, weight average molecular weight 160000, ENB mass content 4.9%.

[0036] Polypropylene resin: M250E (random copolymerization), Y2600T (homopolymerization) (purchased from Sinopec, PP), 230°C, melt index at 2.16 kg are 2.5 and 26 respectively;

[0037] Hydrogenated styrene thermoplastic elastomer: 503 (purchased from Yueyang Petrochemical Company, SEBS), 1651, 1654 (purchased from Krato...

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Abstract

The invention discloses a thermoplastic vulcanizate elastomer composition and a preparation method thereof. The composition comprises the following components in parts by weight: 100 parts of ethylene-propylene-diene monomer rubber, 50-400 parts of polypropylene resin, 50-400 parts of a hydrogenated styrenic thermoplastic elastomer, 100-800 parts of mineral oil, 40-500 parts of a mineral filling agent, 0-10 parts of a stabilizer, 4-12 parts of a phenolic resin vulcanizing agent and 0-10 parts of processing aids. Compared with traditional TPV, the thermoplastic vulcanizate elastomer composition remains the characteristic of low compression set and is improved in term of fluidity and therefore the appearance of an injection molded surface is improved. The thermoplastic vulcanizate elastomer composition has hardness which is adjustable between 30A-55D, has soft and smooth handfeel, has damping and denoising effects and can meet the requirements of fields such as machinery, autos and electronics and electric products.

Description

technical field [0001] The invention relates to a thermoplastic vulcanized rubber elastomer composition and a preparation method thereof, in particular to a thermoplastic vulcanized rubber elastomer composition with improved fluidity and a preparation method thereof. Background technique [0002] Commercial thermoplastic vulcanizate (TPV) is mainly PP / EPDM vulcanized by phenolic resin, which is a polymer elastomer material composed of highly vulcanized EPDM particles dispersed in continuous polypropylene PP phase. The physical properties and functions of thermoplastic vulcanizate at room temperature are similar to those of thermosetting rubber. At high temperatures, they behave like thermoplastics and can be processed quickly, economically and conveniently. [0003] Thermoplastic vulcanizate is characterized by good elasticity and resistance to compression deformation. The general industry requirements for its use are 70°C, 22-hour compression set of less than 40%. At the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/12C08L23/14C08L53/00C08L53/02C08K13/02C08K5/01C08K3/26C08K3/34
CPCC08L91/00C08L2205/035C08L2207/04C08L2312/04C08L23/16C08L23/14C08L53/025C08L61/06C08L23/12
Inventor 程睿刘森林王东庆
Owner SINOTEX INVESTMENT & DEV CO LTD
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