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Light-odor high-heat-resistance polystyrene resin and preparation method thereof

A polystyrene resin, high heat-resistant technology, applied in the field of low-odor high-heat-resistant polystyrene resin and its preparation, can solve the problems of volatile gas influence, volatile matter and odor, etc., to reduce harm and improve heat resistance The effect of simple performance and preparation process

Active Publication Date: 2013-11-06
CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the injection molding temperature will often cause the degradation of the HIPS resin, and the generation of volatile gases will affect the surface of the injection molded parts and the workshop environment. The aldehydes and ketones produced by the degradation due to thermal oxygen and shearing will also produce volatiles and odors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0050] The characteristic of table 1 molecular sieve

[0051] Molecular sieve

[0052] 3

[0053] Table 2 formula composition and content

[0054] components

[0055] Table 3 formula composition and content

[0056] components

[0057] Table 4 comparative example formula composition and content

[0058] component name

[0059] The above raw materials are put into a high-speed mixer with a rotation speed of about 1000rpm for 3-5 minutes according to the weight percentage, and then the mixed raw materials are placed in a twin-screw extruder for melt extrusion and granulation, wherein the twin-screw extruder The length-to-diameter ratio of the machine is 32-46, the temperature of each section of the screw barrel should be kept between 180°C and 240°C, the screw speed is 300-500 rpm, the residence time is 0.5-2 minutes, and the pressure is 10-20MPa.

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Abstract

The invention discloses light-odor heat-resistance polystyrene resin and a preparation method thereof. The light-odor high-heat-resistance polystyrene resin comprises the following components in percentage by weight: 90 to 99.5 percent of high impact polystyrene (HIPS) resin, 0.1 to 5 percent of molecular sieve, 0.1 to 1 percent of antioxygen, and 0.1 to 4 percent of processing assistant, wherein the molecular sieve is a one-dimensional or multi-dimensional porous structure; and in the molecular sieve, the molar ratio of a silicon element to an aluminum element is 2 to 50. The preparation method of the flame-retarding polystyrene resin with high glow-wire ignition temperature comprises: weighing the components according a weight mixing ratio; mixing the components in a high-speed mixer for 3 to 5 minutes; and extruding and granulating the mixed material in a screw extruder. The light-odor high-heat-resistance polystyrene resin has high heat resistance and light odor and meets the requirements of an environment-protection trend.

Description

technical field [0001] The invention relates to a polystyrene composition, in particular to a low-odor, high-heat-resistant polystyrene resin and a preparation method thereof. Background technique [0002] Polystyrene resin was industrialized in 1930 by I.G Farben (the predecessor of BASF) in Germany. As one of the five general-purpose plastics, it has the advantages of excellent formability, hard quality, transparency, rigidity, electrical insulation, low hygroscopicity, easy dyeing and low price. HIPS is produced by introducing a small amount of elastomer into GPPS, which overcomes the brittleness of GPPS, so it is widely used in electronics, automobiles, home appliances, instruments, daily necessities, toys and other industries. [0003] However, due to the limited synthesis method and production conditions, more than hundreds of ppm of styrene monomers often remain in polystyrene resin products. According to US FDA21CFR 177.1640 and China GB 9692 88, the content of sty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/00C08K7/26B29C47/92B29C48/92
CPCB29C48/625B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 付锦锋王林刘建中郭少华胡志华黄恒梅
Owner CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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