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Preparation of wear resistant thermoplastic alkene complex

A thermoplastic olefin and composite technology, applied in the field of preparation of thermoplastic olefin composites, can solve the problem of reducing the mechanical properties of materials, low temperature resistance and environmental cracking resistance, not improving the compatibility of organosiloxane and thermoplastic elastomers, It is impossible to greatly improve the wear resistance and long-term wear resistance of products, so as to achieve the effects of improving compatibility, improving long-term wear resistance and improving processing performance

Active Publication Date: 2009-06-24
SHANDONG DAWN POLYMER CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods have solved the problem of precipitation of wear-resistant additives to a certain extent due to the selection of high-viscosity organosiloxane or the crosslinking of organosiloxane itself, and increased the amount of organopolysiloxane added. However, the compatibility between organosiloxane and thermoplastic elastomer has not been improved, so it is impossible to greatly improve the wear resistance of the product and prepare a long-lasting wear-resistant product, and severe phase separation will reduce the mechanical properties of the material. Low temperature resistance and environmental cracking resistance cannot effectively improve the melt strength of polymer materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014]Embodiment 1: Dissolving 0.2g peroxide initiator DCP with 5g acetone makes peroxide initiator solution, and 1000g PP / EPDM thermoplastic vulcanizate (TPV73A, trade name: Dawnprene, Shandong Dawn Beihua elastomer material Co., Ltd.), peroxide initiator solution, 2g silane coupling agent KH570 (specific substance and specific amount) are added into the mixer and stirred at high speed for 3 minutes to obtain the mixture of the above-mentioned raw materials; the raw material mixture is dropped into a screw with a diameter of 25, long diameter In a twin-screw extruder with a ratio of 56, at a speed of 700r / min, reaction extrusion granulation at a temperature above 190°C, during the extrusion process, the grafting reaction of the silane coupling agent on the polyolefin molecular chain is completed to obtain silane Grafted thermoplastic vulcanizate (i.e. silane grafted TPV); silane grafted thermoplastic vulcanizate with 50g of intrinsic viscosity of 10 8 Amino-modified tetrameth...

Embodiment 2

[0015] Embodiment 2: The preparation steps are as in Example 1. This embodiment uses PP / EPDM thermoplastic vulcanizate (TPV73A, trade name: Dawnprene, produced by Shandong Dawn Beihua Elastomer Material Co., Ltd.) as the substrate to prepare high wear-resistant, low-friction Coefficient thermoplastic vulcanizate, the content of each component is shown in Table 1.

Embodiment 3

[0016] Embodiment 3: step is as example 1, adopts linear low-density polyethylene (LLDPE 7042, Qilu Petrochemical provides) to prepare the linear low-density polyethylene of high wear resistance, low coefficient of friction for substrate, wherein the content of each component is as shown in table 1 Show.

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Abstract

The invention relates to a method for preparing wear-resistant thermoplastic olefin hydrocarbon compound, which comprises: first, chemical grafting modification is carried out on thermoplastic olefin hydrocarbon polymer in an initiation system by silane coupling agent under the condition that peroxide initiator exists, thus leading the thermoplastic olefin hydrocarbon polymer to take along alkoxy or chloro-silane branched chain; polysiloxane which has super high molecular weight and H+ active group on at least one end is mixed together with the thermoplastic olefin hydrocarbon polymer which is processed by grafting modification in a melt extrusion way, so that hydrogen bond connection is formed between the polysiloxane with super high molecular weight and the polymer silane branched chain to obtain the thermoplastic olefin hydrocarbon compound. The method greatly improves the compatibility between the polysiloxane with super high molecular weight and the thermoplastic olefin hydrocarbon compound, thus the adding quantity of the polysiloxane can be increased by about ten times, and the long-term wearing resistance of the products can be improved. After being rubbed for 10,000 times, the product has the friction depth being about half of the traditional technical product added with wear resistant addition agent, and the static state friction coefficient and the dynamic friction coefficient being 10% more than the traditional blending technical product.

Description

technical field [0001] The invention relates to a preparation method of a thermoplastic olefin compound, in particular to a method for preparing a thermoplastic olefin compound with high wear resistance and low friction coefficient, and the prepared wear-resistant thermoplastic olefin compound can be used for automotive interior parts, sealing strips, building doors and windows Wear-resistant surface layer of thermoplastic polymer articles such as sealing strips. Background technique [0002] Due to the advantages of light weight, convenient processing and molding, and insulation, thermoplastic polymer materials are widely used in the fields of automotive interior parts, sealing strips, and building sealing strips. In these applications, thermoplastic polymer products are usually in contact and friction with hard parts such as glass, such as the sealing strips of automobiles or building doors and windows, which are subject to the friction of glass for a long time during the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L83/04
Inventor 张立群田洪池陈文泉于晓宁伍社毛韩吉彬
Owner SHANDONG DAWN POLYMER CO LTD
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