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Flame-retardant interfacial modifier and preparation method and flame retardant polycarbonate composition

A modifier and interface technology, which is applied in the field of flame retardant interface modifier and preparation and flame retardant polycarbonate composition, can solve the problems of low flame retardant efficiency, large amount of phosphorus flame retardant, and polycarbonate performance Large impact and other issues, to achieve the effects of obvious flame retardancy, excellent impact strength and other mechanical properties

Inactive Publication Date: 2009-06-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flame retardants commonly used are halogen flame retardants, phosphorus flame retardants, etc. Due to environmental pollution problems of halogen flame retardants, developed countries or regions such as Western Europe, North America, and Japan have successively promulgated and implemented non-standard flame retardants. The ban on halogenated flame retardants; the large amount of phosphorus flame retardants has a great impact on the performance of polycarbonate
Environmentally friendly organopolysiloxanes can be used as flame retardants for polycarbonates. The existing Chinese patent (Patent No. ZL 03800721.5) discloses a polyorganosiloxane and a vinyl monomer by containing at least two A thermoplastic resin composition in which a graft copolymer of polyorganosiloxane formed by graft copolymerization of polyfunctional monomers with unsaturated bonds, an alkali metal salt, and a fluororesin are jointly flame-retardant, but the graft copolymer polyorganosiloxane The main skeleton of siloxane is polydimethylsiloxane, polymethylphenylsiloxane and dimethylsiloxane-diphenylsiloxane copolymer, without any trifunctionality or more Not only the reaction temperature of polysiloxane polymerization part is above 70℃, but also the flame retardant efficiency is not high. In the case of compounding alkali metal salt and fluororesin, the usage amount of the graft copolymer still reaches the quality of polycarbonate 3%

Method used

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  • Flame-retardant interfacial modifier and preparation method and flame retardant polycarbonate composition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The first step: add 880g of deionized water, 1.5g of tetradecylbenzenesulfonic acid and polyethylene glycol with a mass ratio of 3 in a four-necked flask equipped with a stirrer, a constant pressure dropping funnel, a thermometer and a reflux condenser. Alcohol lauryl ether composite emulsifier, add dropwise 14.8g octamethyltetrasiloxane, 64.8g diphenyldihydroxysilane, 46.2g γ-methacryloxypropylmethyldimethoxysilane , reacted at 60° C. for 5 hours, then lowered the temperature to 30° C., added dropwise 118.8 g of phenyltrimethoxysilane and reacted for 6 hours to obtain a high phenyl organopolysilsesquioxane emulsion.

[0031]Step 2: Use 0.2mol / L ammonia solution to adjust the pH value of the emulsion to 8-10, pass nitrogen into the reaction system and raise the temperature to 60°C, add 1.6g sodium dodecylbenzenesulfonate and 0.03g persulfuric acid Potassium-sodium thiosulfate initiation system, drop 30.8g hexyl acrylate, react for 8 hours to obtain polysilsesquioxane-he...

Embodiment 2

[0033] The first step: Add 880g of deionized water, 30.0g of dodecylbenzenesulfonic acid and nonylphenol with a mass ratio of 0.5 to a four-necked flask equipped with a stirrer, a constant pressure dropping funnel, a thermometer and a reflux condenser. Polyoxyethylene ether composite emulsifier, slowly drop 211.8g phenyltrimethoxysilane, 12.7g tetramethoxysilane, 25.2g dimethyldiethoxysilane, 51.8g vinyltrimethoxysilane Add and react at 30°C for 12 hours to obtain a high phenyl organopolysilsesquioxane emulsion.

[0034] Step 2: Use 2mol / L potassium hydroxide solution to adjust the pH value of the emulsion to 9-10, pass nitrogen into the reaction system and raise the temperature to 90°C, add 9.5g butyl acrylate, 0.5g dodecylbenzenesulfonate Sodium acid pre-emulsified for 1 hour, then dropwise added an aqueous solution containing 0.05g ammonium persulfate, and continued to react for 4 hours to obtain a polysilsesquioxane-butyl acrylate emulsion; add 28.4g butyl methacrylate, 4....

Embodiment 3

[0036] The first step: 120g phenyltriethoxysilane, 18.7g tetraethoxysilane, 26.6g octamethylcyclotetrasiloxane, 46.2g diphenyldiethoxysilane, 9.9g gamma-methylpropene Acyloxypropyltrimethoxysilane is mixed evenly, and one-tenth of it is added to a tank equipped with a stirrer, a constant pressure dropping funnel, a thermometer and a reflux condenser, which has added 880g of deionized water and 4.0g of dodecyl In a 2000mL four-necked flask of benzenesulfonic acid, react at 40°C for half an hour to obtain a blue polysilsesquioxane seed emulsion; add 2.0g of dodecylbenzenesulfonic acid, and add the remaining nine-tenths of The silane monomer mixture was reacted at 40°C for 8 hours to obtain a high phenyl organopolysilsesquioxane emulsion.

[0037] Step 2: Use 0.2mol / L sodium hydroxide solution to adjust the pH value of the emulsion to 9-10, pass nitrogen into the reaction system and raise the temperature to 95°C, add 0.5g sodium dodecylbenzenesulfonate, 1.0g Potassium persulfate...

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Abstract

The invention discloses an inflaming retarding interface modifier and a preparation method thereof, and an inflaming retarding polycarbonate composite. The inflaming retarding interface modifier comprises two parts, namely high phenyl polysilsesquioxane and polyacrylate which are combined through a vinyl free radical polymerization reaction. The preparation method comprises: the emulsion copolymerization of high phenyl polysilsesquioxane, acrylic esters, and methacrylate in turn, and the emulsion breaking and drying. The inflaming retarding polycarbonate composite comprises: 97.8 to 99.3 mass portions of polycarbonate, 0.1 to 1.0 mass portion of the inflaming retarding interface modifier, 0.05 to 1.0 mass portion of fluoro-resin, and 0.05 to 1.0 mass portion of organic sulphonate. The total dosage of the three flame retardants is 0.5 portion; and the polycarbonate composite spline with the thickness of 1.6mm can be enabled to reach the UL94V-0 grade. The composite can be used for preparing all kinds of office automation equipment, electronic and electric equipment and so on.

Description

technical field [0001] The present invention relates to a flame retardant interface modifier, in particular to a high phenyl organopolysilsesquioxane which can endow polycarbonate thermoplastic resins with flame retardant properties and a polycarbonate which has excellent interfacial interaction with polycarbonate Polyacrylate, the two parts are combined through polycondensation reaction and vinyl radical polymerization reaction, specifically relate to the flame retardant interface modifier and preparation method and a flame retardant polycarbonate combination comprising the flame retardant interface modifier thing. Background technique [0002] Organic polysilsesquioxane has excellent high temperature resistance, oxidative degradation resistance and environmental friendliness. It is widely used in high-performance plastic additives and insulating materials in the microelectronics industry. In recent years, its application in flame retardants has begun to attract attention. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F2/24C08L69/00C08K5/42C08L51/08
Inventor 赵建青孙红燕刘述梅叶华
Owner SOUTH CHINA UNIV OF TECH
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