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Flame-retardant styrene resin composition for large-scale thin wall parts and preparation method thereof

A technology of styrene-based resin and styrene resin, which is applied in the field of resin composition and its preparation, can solve the problems of material thermal stability and modulus decline, limited improvement of material fluidity, and inability to completely avoid weld lines, etc., to achieve shortening Effect of molding cycle, improved surface gloss, significant market value and economic value

Inactive Publication Date: 2012-10-03
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, improving the fluidity of materials is a simple and effective way to improve the weld line, but there are two problems if choosing a high-flow matrix resin or increasing the amount of lubricant added: (1) The improvement of material fluidity is limited and cannot be completely improved. Avoid the generation of weld lines; (2) Increasing the content of processing aids often leads to a decrease in the thermal stability and modulus of the material, causing negative effects

Method used

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  • Flame-retardant styrene resin composition for large-scale thin wall parts and preparation method thereof
  • Flame-retardant styrene resin composition for large-scale thin wall parts and preparation method thereof
  • Flame-retardant styrene resin composition for large-scale thin wall parts and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-3

[0037] A preparation method for a flame-retardant styrenic resin composition for large thin-walled parts, the method comprising the following steps:

[0038] (1) Prepare raw materials according to the following components: high impact polystyrene: HIPS-1: MI=6.2g / 10min, HIPS-2: MI=12.8g / 10min; styrene-butadiene block copolymer : SBS: Rubber content 65%; Bisphenol A-diphenyl phosphate: BDP: PX-200 supplied by Daihachi Co.Ltd, phosphorus content 8.6%; Flame retardant: DBDPE: Decabromodiphenylethane, Dead Sea bromine F-8010 provided; BEO: brominated epoxy oligomer, F-2016K provided by Kaimei Chemical; antimony trioxide: Sb 2 o 3 : Hunan Huachang Antimony Industry, purity > 99.8%, particle size 4000 mesh. Other components: antioxidant 168, antioxidant 1010, Ciba essence; lubricant: N, N-ethylene-bisstearamide EBS: HONEYWELL. The content of each component is shown in Table 1.

[0039] (2) Premix the above components in a high-speed mixer for 20 minutes, and control the temperat...

Embodiment 4

[0057] A preparation method for a flame-retardant styrenic resin composition for large thin-walled parts, the method comprising the following steps:

[0058] (1) Prepare raw materials according to the following components: 60kg rubber modified styrene resin, 5kg impact modifier, 1kg phosphorus compound, 8kg flame retardant, 7kg flame retardant synergist, wherein rubber modified styrene resin It is high-impact polystyrene, its melt flow rate is 8g / 10min, rubber is dispersed in styrene resin in the form of particles, and it is a sea-island structure observed by transmission electron microscope; the impact modifier is styrene-EPDM Rubber block copolymer, the content of rubber is 50wt%, the phosphorus-containing compound is aromatic phosphate, and the structural formula is as follows:

[0059]

[0060] Among them, R 1 , R 2 , R 4 , R 5 for C 6 、C 10 、C 12 、C 16 、C 20 Aryl substituted aromatic groups, R 3 It is resorcinol, the polymer n is 4; the flame retardant is 2,4...

Embodiment 5

[0064] A preparation method for a flame-retardant styrenic resin composition for large thin-walled parts, the method comprising the following steps:

[0065] (1) Prepare raw materials according to the following components: 70kg rubber modified styrene resin, 1kg impact modifier, 5kg phosphorus compound, 17kg flame retardant, 3kg flame retardant synergist, wherein rubber modified styrene resin It is high-impact polystyrene with a melt flow rate of 12g / 10min. The rubber is dispersed in styrene resin in the form of particles, and it is a sea-island structure observed by transmission electron microscopy; the impact modifier is styrene-EPDM Rubber block copolymer and styrene-butadiene block copolymer compound with a weight ratio of 1:2, the rubber content is 80wt%, and the phosphorus-containing compound is bisphenol A-diphenyl phosphate; flame retardant The agent is tetrabromobisphenol A; the flame retardant synergist is antimony trioxide with a particle size of 2000 mesh; it also ...

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Abstract

The invention relates to a flame-retardant styrene resin composition for large-scale thin wall parts and a preparation method thereof. The composition comprises the following components in part by weight: 60 to 82 parts of rubber-modified styrene resin, 1 to 5 parts of impact modifier, 1 to 5 parts of phosphorus compound, 8 to 17 parts of flame retardant and 3 to 7 parts of flame retardant synergist. The preparation method comprises the steps of: respectively putting the components in a high speed mixer for premixing; adding the obtained premix into a double-screw extruder; and conveying, melting, cutting, extruding, cooling and granulating to obtain the product. The invention has the advantages that: by adding aromatic phosphate with low molecular weight into the flame-retardant styrene resin composition, the fluidness of the composition is improved, the toughness and heat stability of the composition are not reduced and reach UL94 1.6mmV0, the generation of weld lines in the molding process of the large-scale thin wall parts is effectively inhibited, the molding period is shortened, the surface gloss of the products is improved, and the weld line problem in the molding process of the large-scale thin wall parts is effectively solved.

Description

technical field [0001] The invention relates to a resin composition and a preparation method thereof, in particular to a flame-retardant styrenic resin composition and a preparation method for large thin-walled parts. Background technique [0002] Due to its excellent rigidity, processability and surface gloss, styrene-based resins are widely used in various industrial fields, such as home appliances, office equipment, and printer copier panels. Requirements, usually need to reach UL94V0 level. [0003] Styrenic resins such as HIPS and ABS have an oxygen index of only 18.0 and are flammable materials. Usually, halogen compounds, phosphorus-containing compounds and inorganic flame retardants need to be added to endow styrene resins with flame retardant properties, among which halogen flame retardants are especially brominated Flame retardants are widely used in flame retardant styrene resins, mainly including tetrabromobisphenol A, decabromodiphenylethane, 2,4,6-tribromotrip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L53/02C08L21/00C08K13/02C08K3/22C08K5/523C08K5/03
Inventor 宋治乾廖志荣辛敏琦李荣群唐银花邱卫美
Owner SHANGHAI KUMHO SUNNY PLASTICS