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TPE rubber coating material and preparation method thereof

A technology of encapsulation and raw materials, applied in the field of TPE encapsulation, can solve the problems of easy to cause coke, unable to directly coat ABS, weak adhesion in local parts, etc., to improve flexibility, improve surface finish and surface feel, Improve the effect of the user experience

Active Publication Date: 2020-08-21
NINGBO TAIYONG AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical applications, commonly used TPE coating materials include soft rubber materials such as PVC / TPV / TPS, but the products that can be coated have limitations. For example, they can directly cover PP / GFPP, etc., but cannot directly cover ABS, ASA, PC / ABS, etc.
At present, there are many commonly used solutions. One is to choose materials with self-adhesive properties for coating; the other is to increase the barrel temperature or mold temperature during injection molding processing, but if the processing temperature is too high, it will easily cause scorching; The edge of the hard material and the soft glue are welded together. The third is to promote the connection by coating glue or adding a physical mosaic structure, but this method is easy to cause local parts to be weakly bonded.

Method used

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  • TPE rubber coating material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation of the TPE encapsulation material in the present embodiment is as follows:

[0051] (1) Preparation of chloromethylated SEBS: Dissolve the raw material SEBS in ethylene dichloride to form a SEBS solution. The concentration of SEBS in the SEBS solution is 0.04g / mL, and the SEBS solution and chloromethyl methyl ether are added to the reflux device Add catalyst zinc chloride, react at 45°C for 4 hours, the weight ratio of raw materials SEBS, chloromethyl methyl ether and catalyst is 1:0.2:0.1, after the reaction is completed, add precipitant methanol or ethanol for precipitation, and then The precipitated product is dried to be chloromethylated SEBS;

[0052] (2) By weight percentage, prepare 22% chloromethylated SEBS, 52% TPU (melt index is 80g / 10min), 18% paraffin oil, 6% talcum powder, 1% polytrifluoropropyl methylsiloxane Alkanes (PTFPMS), 0.6% hindered phenolic antioxidant Irganox 1010, 0.4% benzophenone anti-ultraviolet agent 5411;

[0053] (3) Stir...

Embodiment 2

[0056] The preparation of the TPE encapsulation material in the present embodiment is as follows:

[0057] (1) Preparation of chloromethylated SEBS: Dissolve the raw material SEBS in ethylene dichloride to form a SEBS solution. The concentration of SEBS in the SEBS solution is 0.03g / mL, and the SEBS solution and chloromethyl methyl ether are added to the reflux device Add catalyst zinc chloride, react at 40°C for 3 hours, the weight ratio of raw materials SEBS, chloromethyl methyl ether and catalyst is 1:0.1:0.07, after the reaction is completed, add precipitant methanol to precipitate, and then precipitate the product Drying is chloromethylated SEBS;

[0058] (2) By weight percentage, prepare 14% chloromethylated SEBS, 60% TPU (melt index is 80g / 10min), 15% paraffin oil, 9% talcum powder, 1.2% polymethyl nonafluorohexylsiloxane Alkanes (PMNFHS), 0.5% hindered phenolic antioxidant Irganox 1010, 0.3% benzophenone anti-ultraviolet agent 770;

[0059] (3) Stir and mix chloromet...

Embodiment 3

[0062] The preparation of the TPE encapsulation material in the present embodiment is as follows:

[0063] (1) Preparation of chloromethylated SEBS: Dissolve the raw material SEBS in ethylene dichloride to form a SEBS solution. The concentration of SEBS in the SEBS solution is 0.04g / mL, and the SEBS solution and chloromethyl methyl ether are added to the reflux device Add catalyst zinc chloride, react at 45°C for 4 hours, the weight ratio of raw materials SEBS, chloromethyl methyl ether and catalyst is 1:0.2:0.1, after the reaction is completed, add precipitant methanol or ethanol for precipitation, and then The precipitated product is dried to be chloromethylated SEBS;

[0064] (2) By weight percentage, prepare 20% chloromethylated SEBS, 50% TPU (melt index is 70g / 10min), 21% paraffin oil, 7% talc, 0.9% polytrifluoropropylmethylsiloxane Alkanes (PTFPMS), 0.5% hindered phenolic antioxidant irganox 1076, 0.6% benzophenone anti-ultraviolet agent 5411;

[0065] (3) Stir and mix...

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Abstract

The invention relates to a TPE rubber coating material and a preparation method thereof, and belongs to the technical field of TPE rubber coating. The TPE rubber coating material is prepared from thefollowing raw material components in percentage by weight: 12-30% of SEBS, 35-60% of TPU, 15-30% of a plasticizer, 0-10% of filler, 0.5-2% of a release agent and 0.8-1.6% of other auxiliary agents, wherein the melt index of TPU is 70-90g / 10min. The TPE rubber coating material is high in viscosity, good in coating performance and not prone to glue failure.

Description

technical field [0001] The invention belongs to the technical field of TPE encapsulation, and relates to a TPE encapsulation material and a preparation method thereof. Background technique [0002] Encapsulation is also called overmolding. The so-called TPE encapsulation is the encapsulation of TPE soft rubber material to the surface of other materials. The product brings functional characteristics such as soft touch, anti-slip, wear-resistant, shock absorption, elasticity, sealing, and waterproof. to meet the specific usage scenarios of the product. From the perspective of injection molding equipment, there are two methods of TPE overmolding, one is two-color injection molding, and the other is ordinary injection molding. The molding effect, molding efficiency and cost of two-color injection molding are better than ordinary injection molding. Overmolding. In terms of connection methods, TPE overmolding methods commonly include physical buckle and chemical bonding. The fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L53/02C08L91/06C08L83/08C08K3/34C08K5/134B29B9/06
CPCC08L75/04B29B9/065C08L2205/035C08L53/025C08L91/06C08L83/08C08K3/34C08K5/1345
Inventor 王玉翠李文斌
Owner NINGBO TAIYONG AUTOMOTIVE PARTS
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