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Composite polyolefine thermoplastic vulcanizate

A thermoplastic vulcanization and polyolefin technology, applied in the field of thermoplastic elastomers, can solve the problems of unavailable thermoplastic vulcanized rubber materials, difficult co-vulcanization problems, unsatisfactory rubber properties, etc., and achieve simplified processing procedures, excellent processability, and reduced The effect of material cost

Inactive Publication Date: 2004-01-07
邵毅
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In foreign countries, there are reports on the preparation of thermoplastic vulcanizate with EPDM / PP system, but due to its high cost, the scope of application is very small
As for the two-component combined rubber system, because the co-vulcanization problem is difficult to solve and high-performance thermoplastic vulcanizate materials cannot be obtained, there are few reports.
Gu Qincui, Guo Hongge, etc. published the paper "Research on the Properties of NR / EPDM / PP Ternary Blended Thermoplastic Materials" ("Journal of Qingdao Institute of Chemical Technology: Natural Science Edition" 2000, 21(4), P325-327, 347), It is reported that in order to solve the co-vulcanization problem of NR / EPDM / PP system, the method of adding rubber and vulcanizing agent in stages is adopted. This method is carried out intermittently on the open mill, which is not suitable for industrial continuous production, and the performance of the rubber is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment consists of the following components:

[0021] EPDM rubber (4045) 60 parts

[0022] 40 parts of styrene-butadiene rubber (1502)

[0023] Maleic anhydride grafted ethylene-propylene copolymer (self-made) 10 parts

[0024] Maleic anhydride grafted ethylene-octene copolymer (self-made) 8 parts

[0025] 20 parts of tert-butylphenol formaldehyde resin

[0026] Chloroprene 6 parts

[0027] Dicumyl peroxide 1.5 parts

[0028] Vinylsilane 2 parts

[0029] Calcium oxide (80%) 10 parts

[0030] 1.5 parts of stearic acid

[0031] The mixture is vulcanized in a twin-screw extruder in a molten state and then pelletized.

[0032] In order to compare the physical properties of the products prepared in this example, ad hoc control groups were used: 10 parts of ethylene-propylene copolymer (8303) and ethylene-octene copolymer (8003) to replace the maleic anhydride in Example 1 Graft copolymer without adding dicumyl peroxide, the other components are the same.

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PUM

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Abstract

The present invention belongs to a thermoplastic elastomerics. The invented rubber part adopts unsaturated rubber / ternary ethylene-propylene rubber (EPDM) double-component system, and adopts double-component vulcanizing agent phenolic resin / peroxide and double-component carboxylation polyolefine to resolve the problems of co-cure of unsaturated rubber and ternary ethylene-propylene rubber (EPDM) and compatibility of unsaturated rubber and polyolefine, the unsaturated rubber is styrene-butadiene rubber, cis-1,4-polybutadiene rubber, nitride rubber or natural rubber. Said invention provides a composite type polyolefine thermoplastic vulcanized rubber which can be continuously produced in twin screw extruder machine.

Description

field of invention [0001] The invention belongs to a thermoplastic elastomer. Background technique [0002] At present, there are many varieties of thermoplastic elastomer (TPE). Compared with other non-vulcanized TPE, thermoplastic vulcanizate (TPV) has the smallest compression set, and its heat resistance and cold resistance are also superior. Its comprehensive performance ranks among TPE. front spear. One of its remarkable advantages is that it can be produced continuously in a twin-screw extruder, with the characteristics of small investment and quick results, unlike other TPE varieties that require huge investment to realize industrialization. [0003] In foreign countries, there are reports on the preparation of thermoplastic vulcanizate with EPDM / PP system, but due to its high cost, the scope of application is very small. As for the use of two-component combined rubber systems, there are few reports because the problem of co-vulcanization is difficult to solve and h...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/02C08L11/00
Inventor 邵毅
Owner 邵毅
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