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Scratch resisting agent and preparation method thereof as well as polypropylene plastic

A scratch-resistant agent and solvent technology, applied in the field of plastic modification, can solve the problems of inconsistent migration speed of scratch-resistant agent, easy scraping of filler, high cost, etc., achieve high balance of scratch-resistant effect and improve scratch-resistant Damage effect, easily controllable effect

Active Publication Date: 2014-12-17
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problems in the prior art that the migration speed of the anti-scratch agent is inconsistent, the cost is high, and the filler in the plastic is easily scraped off and turns white

Method used

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  • Scratch resisting agent and preparation method thereof as well as polypropylene plastic
  • Scratch resisting agent and preparation method thereof as well as polypropylene plastic

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The present invention also provides the preparation method of described anti-scratch agent, comprises the following steps:

[0023] A. Disperse the inorganic filler in the solvent to form a filler dispersion;

[0024] B. Add base rubber to the filler dispersion, then add catalyst and crosslinking agent, form polysiloxane on the surface of the inorganic filler by in-situ polymerization, and pulverize after drying to obtain the scratch-resistant agent; the base gum is active A group-terminated organosiloxane polymer, the cross-linking agent is an organosilicon capable of cross-linking reaction with the gum base.

[0025] Specifically, in the present invention, the inorganic filler is first dispersed in a solvent to form a filler dispersion, so that the subsequent base glue, cross-linking agent and filler are uniformly dispersed, which facilitates the coating of the surface of the inorganic filler with polysiloxane. In this step A, the solvent is an alcohol or an aqueous ...

Embodiment 1

[0043] (1) Disperse 100g of inorganic filler calcium carbonate with a particle size of 1000 mesh in 1000g of solvent ethanol to form a filler dispersion. Add 100g base vinyl liquid silicone rubber to the filler dispersion, stir evenly, then slowly add 10g catalyst chloroplatinic acid and 40g crosslinking agent hydrogen-containing silicone oil with a dropping funnel, and react for 24 hours under stirring. The reaction product was separated from solid to liquid, the filter cake was washed, dried at 50°C, and pulverized to obtain the scratch-resistant agent S1 of this example, which has figure 1 structure shown.

[0044] (2) Weigh 50g of anti-scratch agent S1, 700g of polypropylene, 40g of polyethylene olefin elastomer, 200g of modified talcum powder with a particle size of 1250 mesh, 2g of ethylene bis stearic acid amide, 2g of antioxidant lrganox1010, 2g Antioxidant lrganox168, 1g calcium stearate, 1g light stabilizer and 2g aluminate coupling agent, use a high-speed mixer to ...

Embodiment 2

[0046] (1) Disperse 100g of inorganic filler talc powder with a particle size of 6000 mesh into 10000g of solvent isopropanol to form a filler dispersion. Add 10g of gum-terminated hydroxyl polyorganosiloxane to the filler dispersion, stir well, then slowly add 0.005g of catalyst 1,3-divinyl-1,1,3,3-tetramethyldi Siloxane platinum and 0.5 g crosslinking agent triethoxysilane were reacted for 1 h under stirring. The reaction product was separated from solid to liquid, the filter cake was washed, dried at 120°C, and crushed to obtain the scratch-resistant agent S2 of this example, which has figure 1 structure shown.

[0047] (2) The polypropylene plastic product S20 of this example was prepared by the same steps as in step (2) of Example 1, except that the scratch-resistant agent S2 was used instead of the scratch-resistant agent S1 in Example 1.

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Abstract

The invention provides a scratch resisting agent. The scratch resisting agent is provided with a core-shell structure, wherein an inorganic filler is adopted and used as a core; and a housing is prepared from polysiloxane and is 9 to 50% in content based on the total mass of the scratch resisting agent. The invention also provides a preparation method of the scratch resisting agent, and a polypropylene plastic adopting the scratch resisting agent. The scratch resisting agent provided by the invention is low in cost; the polypropylene plastic adopting the scratch resisting agent provided by the invention is excellent in scratch resistance, and relatively high in balance of the scratch resisting effects of the plastic surface.

Description

technical field [0001] The invention belongs to the field of plastic modification, and in particular relates to a scratch-resistant agent, a preparation method thereof and a polypropylene plastic. Background technique [0002] Many plastic parts, such as dashboards, sub-dashboards, door panels, pillars, glove boxes, pull-up covers, etc. in the field of automotive interior parts, will inevitably be rubbed by hard objects during production, transportation and use , causing the filler to be exposed from the plastic matrix, thereby changing the color of the interior parts, affecting the durability and aesthetics of the interior parts, and failing to fully meet the appearance requirements of the automotive interior parts. Therefore, scratch resistance has gradually become a hard indicator of plastic products. [0003] At present, the main methods to improve the scratch resistance of polypropylene plastic products are: (1) to improve the surface hardness of plastic products; (2) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/06C08K3/34C08K3/26C09C1/02C09C1/28C09C3/12C08L23/12C08L23/08C08K13/06
Inventor 曾永斌刘勇常德才
Owner HUAWEI TEHCHNOLOGIES CO LTD
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