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Weather-resisting injection molding and over-molding thermoplastic elastomer composition

A thermoplastic elastomer and composition technology, applied in the field of thermoplastic elastomer composition, can solve the problems of poor weather resistance, not fine enough appearance, poor thermal stability, etc., achieve excellent appearance, avoid weather resistance defects, and fast molding speed

Inactive Publication Date: 2014-05-21
SINOTEX INVESTMENT & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this type of elastomeric composition has the following defects: in the injection molding process, the thermal stability is poor, if it stays in the barrel for more than 5 minutes, it will cause decomposition, the molding is slow, the appearance is not delicate enough, and the weather resistance is poor. very restrictive

Method used

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  • Weather-resisting injection molding and over-molding thermoplastic elastomer composition
  • Weather-resisting injection molding and over-molding thermoplastic elastomer composition
  • Weather-resisting injection molding and over-molding thermoplastic elastomer composition

Examples

Experimental program
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Effect test

Embodiment

[0033] In each of the following examples or comparative examples, the raw material components were weighed according to the proportions shown in Table 1 or Table 2, and the styrenic thermoplastic elastomer and mineral oil were fully mixed first, and the styrenic thermoplastic elastomer After fully absorbing the oil, add an appropriate amount of polystyrene resin, mineral filler, stabilizer and other processing aids according to the formula and mix them evenly in the mixer. After mixing, the materials are fed into a twin-screw extruder (CTE35 Coperion Keya (Nanjing) Machinery Co., Ltd.), and processed under the conditions of processing temperature (190°C~240°C) and screw speed (180rpm~300rpm). The raw material mixture is sheared at high speed by twin-screw, kneaded, extruded, drawn, cooled and granulated. The injection-bonded thermoplastic elastomer compositions of each example or comparative example were obtained.

[0034] 1. Raw material ratio

[0035] Copolyester resins: ...

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Abstract

The invention provides a thermoplastic elastomer composition. The thermoplastic elastomer composition comprises following components in parts by weight: 5-20 parts of a styrene type thermoplastic elastomer, 10-30 parts of mineral oil, 30-50 parts of co-polyester resin, 1-10 parts of a compatilizer, 15-35 parts of a mineral filling agent, 0-2 parts of a stabilizer and 0-2 parts of a lubricant. The hardness of the thermoplastic elastomer composition provided by the invention can be freely adjusted in a range of 40-85A; a processing window is wide; the thermoplastic elastomer composition has an excellent surface effect under an injection molding temperature of 180-250 DEG C and has good hand feel comfort. The thermoplastic elastomer composition can be rapidly injected and molded and has a good anti-scratching performance. The weather resistance is good. The thermoplastic elastomer composition has a good covering performance on the surface of a product which takes ABS (Acrylonitrile Butadiene Styrene), ABS / PC (Polycarbonate) and other materials modified by taking the ABS as a base material.

Description

technical field [0001] The invention relates to a thermoplastic elastomer composition with good weather resistance injection molding, especially a thermoplastic elastomer composition for injection molding with ABS, ABS / PC and other hard plastics based on ABS modification. Background technique [0002] ABS resin is currently the polymer with the largest output and the most widely used. It organically unifies the various properties of PS, SAN, and BS, and has excellent mechanical properties of toughness, hardness, and rigid phase balance. ABS refers to the terpolymer of acrylonitrile, butadiene and styrene, ABS resin is one of the five major synthetic resins [0003] ABS, ABS / PC and other ABS-modified materials have excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties, and also have the characteristics of easy processing, stable product size and good surface gloss. It is easy to paint and color, and can also c...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L53/02C08L91/00C08L51/00C08K13/02C08K3/26C08K3/34C08K3/30
Inventor 王东庆程睿何三雄刘森林
Owner SINOTEX INVESTMENT & DEV CO LTD
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