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Fire-retardancy styrene resin composition and its forming product

A technology of styrene-based resin and resin composition, which is applied in the field of flame-retardant styrene-based resin composition, and can solve problems such as polluting molds, extreme decline in heat resistance, and damage to the characteristics of styrene-based resins

Inactive Publication Date: 2007-02-07
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the conventional phosphides are low-boiling compounds, so in the resin that needs to be extruded and molded at a relatively high temperature, there will be problems such as gas generation during extrusion and mold contamination during molding.
In addition, it is known that if general phosphide is added to styrenic resin, the heat resistance will be extremely reduced and the original characteristics of styrenic resin will be damaged.

Method used

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  • Fire-retardancy styrene resin composition and its forming product
  • Fire-retardancy styrene resin composition and its forming product
  • Fire-retardancy styrene resin composition and its forming product

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0193] Preparation of 2,4,8,10-tetraoxa-3,9-diphosphospiro[5.5]undecane, 3,9-dibenzyl-3,9-dioxide (FR-1)

[0194] 816.9 g (6.0 mol) of pentaerythritol, 19.0 g (0.24 mol) of pyridine, and 2250.4 g (24.4 mol) of toluene were added and stirred in the reaction container provided with the thermometer, the condenser, and the dropping funnel. 1651.8 g (12.0 mol) of phosphorus trichloride was added to this reaction container using this dropping funnel, and it heat-stirred at 60 degreeC after completion|finish of addition. After the reaction, it was cooled to room temperature, 26.50 parts of methylene chloride was added to the obtained reactant, and 889.4 g (12.0 mol) of t-butanol and 150.2 g (1.77 mol) of methylene chloride were added dropwise while ice-cooling. The resulting crystals were washed with toluene and dichloromethane and filtered. At 80°C, 1.33×10 2 The obtained filtrate was dried under Pa for 12 hours to obtain 1341.1 g (5.88 mol) of a white solid. pass 31 P. 1 HNMR ...

preparation example 2

[0199] Preparation of 2,4,8,10-tetraoxa-3,9-diphosphospiro[5.5]undecane, 3,9-dibenzyl-3,9-dioxide (FR-2)

[0200] 22.55 g of 3,9-dibenzyloxy-2,4,8,10-tetraoxa-3,9-diphosphospiro[5.5]undecane ( 0.055 mol), 19.01 g (0.11 mol) of benzyl bromide, and 33.54 g (0.32 mol) of xylene were stirred at room temperature while blowing dry nitrogen. Then, heating was started with an oil bath, and the mixture was heated and stirred at reflux temperature (about 130° C.) for 4 hours. After heating, it was left to cool to room temperature, 20 mL of xylene was added, and stirred for another 30 minutes. The precipitated crystals were separated by filtration and washed twice with 20 ml of xylene. The obtained crude product and 100 ml of methanol were put into a reaction vessel equipped with a condenser and a stirrer, and refluxed for about 2 hours. After cooling to room temperature, the crystals were separated by filtration, washed with 20ml of methanol, and the obtained filtrate was heated at 1...

preparation example 3

[0203] Preparation of 2,4,8,10-tetraoxa-3,9-diphosphospiro[5.5]undecane, 3,9-dibenzyl-3,9-dioxide (FR-3)

[0204] 22.55 g of 3,9-dibenzyloxy-2,4,8,10-tetraoxa-3,9-diphosphospiro[5.5]undecane ( 0.055 mol), 19.01 g (0.11 mol) of benzyl bromide, and 33.54 g (0.32 mol) of xylene were stirred at room temperature while blowing dry nitrogen. Then, heating was started with an oil bath, and the mixture was heated and stirred at reflux temperature (about 130° C.) for 4 hours. After heating, it was left to cool to room temperature, 20 mL of xylene was added, and stirred for another 30 minutes. The precipitated crystals were separated by filtration, at 100°C, 1.33×10 2 The resulting filtrate was dried under reduced pressure at Pa. The obtained white solid 1 H. 31 P-NMR confirmed that it was 2,4,8,10-tetraoxa-3,9-diphosphospiro[5.5]undecane, 3,9-dibenzyl-3,9-dioxide. Heating weight loss residue is 10.1%, acid value is 2.5mgKOH / g, HPLC purity is 84%, 31 PNMR purity was 85%.

[0205]...

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Abstract

A styrene resin composition which is excellent in thermal stability, hue, flowability, and heat resistance and further has flame retardancy; and a molded article formed therefrom which has an excellent appearance. The resin composition comprises (A) 100 parts by weight of a styrene resin (ingredient (A)), (B) 0 to 100 parts by weight of a polyphenylene ether resin (ingredient (B)), and (C) 1 to 100 parts by weight of an organophosphorus compound represented by the following formula (1), and is characterized in that the organophosphorus compound (ingredient (C)) satisfies the following requirements: (i) the amount of the residue left after heating at 500 DEG C is 10% by weight or less, (ii) the HPLC purity is 90% or higher, and (iii) the acid value is 0.5 mg-KOH / g or lower. In the formula, Ar<1> and Ar<2> may be the same or different and each represents optionally substituted phenyl.

Description

technical field [0001] The present invention relates to a flame-retardant styrene-based resin composition having flame retardancy, thermal stability, hue, fluidity, and heat resistance, and a molded article formed therefrom with excellent appearance. More specifically, it relates to a flame-retardant styrenic resin composition containing a pentaerythritol diphosphonate compound having predetermined properties and substantially free of halogen, and a molded article thereof. Background technique [0002] Styrene-based resins have excellent impact resistance and excellent moldability, so they are used in many fields such as office automation equipment parts, home appliance parts, and automobile parts, but their use is limited due to their flammability. Especially in recent years, in order to improve the safety of products, for the molded products of office automation machines and home appliances, the flame retardancy test standard stipulated in the 94th item of the American Sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L71/12C08K5/5357C09K21/12C07F9/6574C07F9/6571C08K5/527
CPCC08K5/5357C08L71/12C08L25/06C07F9/657181C09K21/12C08L25/02C08L2666/22C08L2666/04
Inventor 山中克浩今村公一田边诚一竹谷丰
Owner TEIJIN KASEK KK
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