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A kind of TPE encapsulation material and preparation method thereof

A technology of encapsulation and raw materials, applied in the field of TPE encapsulation, can solve the problems of weak adhesion in local parts, inability to directly encapsulate ABS, easy to cause coke materials, etc., to achieve good spreading effect, improve encapsulation efficiency and encapsulation. Effect, good wear resistance effect

Active Publication Date: 2022-06-21
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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  • A kind of TPE encapsulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0051] (1) Preparation of chloromethylated SEBS: the raw material SEBS is dissolved in dichloroethane 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 The catalyst was added with zinc chloride, and the reaction was carried out at 45 °C for 4 hours. The weight ratio of the raw material SEBS, chloromethyl methyl ether and the catalyst was 1:0.2:0.1. After the reaction was completed, methanol or ethanol was added as a precipitation agent for precipitation, and then the The drying of the precipitated product is chloromethylated SEBS;

[0052] (2) By weight percentage, prepare 22% chloromethylated SEBS, 52% TPU (melt index is 80g / 10min), 18% paraffin oil, 6% talc, 1% polytrifluoropropyl methylsiloxane Alkane (PTFPMS), 0.6% hindered phenolic antioxidant Irganox 1010,...

Embodiment 2

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

[0057] (1) Preparation of chloromethylated SEBS: the raw material SEBS is dissolved in dichloroethane to form a SEBS solution, the concentration of SEBS in the SEBS solution is 0.03 g / mL, and the SEBS solution and chloromethyl methyl ether are added to the reflux device In addition, the catalyst zinc chloride was added, and the reaction was carried out at 40 °C for 3 hours. The weight ratio of the raw material SEBS, chloromethyl methyl ether and the catalyst was 1:0.1:0.07. After the reaction was completed, the precipitant methanol was added for precipitation, and then the precipitated product was Drying is chloromethylated SEBS;

[0058] (2) By weight percentage, prepare 14% chloromethylated SEBS, 60% TPU (melt index is 80g / 10min), 15% paraffin oil, 9% talc, 1.2% polymethyl nonafluorohexylsiloxane Alkane (PMNFHS), 0.5% hindered phenolic antioxidant Irganox 1010, 0.3% benzophen...

Embodiment 3

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

[0063] (1) Preparation of chloromethylated SEBS: the raw material SEBS is dissolved in dichloroethane 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 The catalyst was added with zinc chloride, and the reaction was carried out at 45 °C for 4 hours. The weight ratio of the raw material SEBS, chloromethyl methyl ether and the catalyst was 1:0.2:0.1. After the reaction was completed, methanol or ethanol was added as a precipitation agent for precipitation, and then the The drying of the precipitated product is 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% polytrifluoropropyl methylsiloxane Alkane (PTFPMS), 0.5% hindered phenolic antioxidant irganox 107...

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Abstract

The invention relates to a TPE encapsulation material and a preparation method thereof, belonging to the technical field of TPE encapsulation. The TPE encapsulation material of the present invention includes the following raw material components in weight percentage: SEBS 12-30%, TPU 35-60%, plasticizer 15-30%, filler 0-10%, release agent 0.5-2%, 0.8-1.6% of other additives, and the melt index of the TPU is 70-90g / 10min. The TPE encapsulation material of the present invention has high viscosity, good encapsulation property and is not easy to unglue.

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] Lagging is also known as overmolding. The so-called TPE lagging is to encapsulate the TPE soft rubber material to the surface of other materials. The product brings soft touch, anti-skid, wear resistance, shock absorption, elasticity, sealing, waterproof and other functional characteristics , to meet the specific usage scenarios of the product. In terms of injection molding equipment, there are two TPE overmolding methods, one is two-color injection molding at one time, and the other is ordinary injection molding secondary molding. The molding effect, molding efficiency and cost of double-color injection molding are better than ordinary injection molding. Secondary molding. To distinguish from the connection method, TPE overmolding methods commonly include physical snap and chem...

Claims

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Application Information

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Patent Type & Authority Patents(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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