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Preparation method of antiflaming polycarbonate composite material with solvent cracking resistance

A technology for flame retardant polycarbonate and polycarbonate, which is applied in the field of preparation of flame retardant polycarbonate composite materials with solvent cracking resistance, can solve the problems of complex flame retardant mechanism of alkyl phosphinate, and achieves blending The method is simple and easy to implement, widely used, and the effect of a wide range of sources

Inactive Publication Date: 2017-05-31
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its relatively high phosphorus content, it only needs a small amount of addition to make the composite material achieve better flame retardant effect, and the flame retardant mechanism of alkyl phosphinate is more complicated

Method used

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  • Preparation method of antiflaming polycarbonate composite material with solvent cracking resistance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The polycarbonate pellets were dried at 120°C for 12 hours, and 2% γ-aminopropyltriethoxysilane coupling agent was added dropwise on the surface of the dried polycarbonate pellets at a temperature of 50°C. Aluminum phosphate flame retardant, the dosage of flame retardant is 5, 10, 15, 20, 25, 30phr respectively. The antioxidant (antioxidant 1076+168) and silane coupling agent with a mass fraction of 3% were mixed evenly in a high-speed mixer. Melt extrusion, cooling, and pelletizing in the twin-screw extruder. The temperature of each section of the twin-screw extruder from the feeding section is as follows: 1st section 240°C, 2nd section 245°C, 3rd section 250°C, 4th section 255°C ℃, 5th stage 260°C, 6th stage 260°C, 7th stage 260°C, 8th stage 255°C, head 250°C, speed 60r / min. The resulting pellets were further injection molded. The main process parameters of the injection molding machine are: the temperature of the first three sections of the injection molding machin...

Embodiment 2

[0024] Dry the polycarbonate pellets at 100°C for 12 hours, add 1.5% vinyl tris(methoxyethoxy)silane coupling agent dropwise on the surface of the dried polycarbonate pellets, at a temperature of 45°C, and diethyl Based on aluminum hypophosphite flame retardant, the dosage of flame retardant is 5, 10, 15, 20, 25, 30 phr respectively. Mix an appropriate amount of antioxidant (antioxidant 1076+101) and silane coupling agent in a high-speed mixer. Melt extrusion, cooling, and pelletizing in the twin-screw extruder. The temperature of each section of the twin-screw extruder from the feeding section is the temperature: 1st section 245°C, 2nd section 245°C, 3rd section 250°C, 4th section 260 ℃, 5th stage 265°C, 6th stage 279°C, 7th stage 265°C, 8th stage 260°C, head 250°C, speed 50r / min. The resulting pellets were further injection molded. The main process parameters of the injection molding machine are: the temperature of the first three stages of the injection molding machine is...

Embodiment 3

[0026]The polycarbonate pellets were dried at 110°C for 10 hours, and 2% γ-glycidyloxypropyltrimethoxysilane coupling agent was added dropwise on the surface of the dried polycarbonate pellets at a temperature of 40°C. With aluminum diethyl hypophosphite flame retardant, the dosage of flame retardant is 5, 10, 15, 20, 25, 30phr respectively. Mix an appropriate amount of antioxidant (antioxidant 1076+168) and silane coupling agent in a high-speed mixer. Melt extrusion, cooling, and pelletizing in the twin-screw extruder. The temperature of each section of the twin-screw extruder from the feeding section is as follows: 1st section 240°C, 2nd section 245°C, 3rd section 250°C, 4th section 255°C ℃, 5th stage 260°C, 6th stage 260°C, 7th stage 260°C, 8th stage 255°C, head 250°C, speed 35r / min. The resulting pellets were further injection molded. The main process parameters of the injection molding machine are: the temperature of the first three stages of the injection molding machi...

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Abstract

The invention particularly relates to a preparation method of an antiflaming polycarbonate composite material with solvent cracking resistance. The antiflaming polycarbonate composite material is prepared by the steps of firstly adding a diethyl aluminium hypophosphite fire retardant, performing blending extrusion with polycarbonate under the action of an antioxygen and a silane coupling agent, and performing injection moulding to obtain phosphor antiflaming polycarbonate; further adding polyphenyl methylsiloxane into the composite resin, and performing compounding to obtain silicon and phosphorus synergistic antiflaming polycarbonate; finally, under the action of a compatilizer, performing blending extrusion on the obtained flame-retardant resin and polyphenyl ether, and performing pressure plate forming to obtain composite polycarbonate with solvent cracking resistance. A physical blending method which is mature and reliable is adopted, the prepared composite polycarbonate has flame retardance and solvent cracking resistance at the same time, and part of properties of engineering plastic are improved, so that the engineering plastic is more widely applied in the fields of electric appliances, building, household, office and the like; the synthesis method is simple and feasible, all raw materials can be produced in an industrialized way, and the popularization and application value is good.

Description

technical field [0001] The invention specifically relates to a preparation method of a flame-retardant polycarbonate composite material with solvent cracking resistance. Background technique [0002] Polycarbonate (PC) refers to a class of high polymers containing carbonate groups in the main chain. It is an engineering plastic with excellent comprehensive properties. The most practical is aromatic polycarbonate, which has outstanding impact toughness and Creep resistance, visible light transmittance up to 90%, high tensile and bending strength. PC itself has UL94 V-2 level of flame retardancy, and its oxygen index reaches 25%, which is also excellent among many resins. However, in order to broaden its application range, it needs to have higher flame retardancy. In addition, the wear resistance and solvent resistance of PC are not good, and the price is also high. [0003] Phosphorus-based flame retardants are low-toxic, long-lasting, and have good thermal stability. They ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L51/08C08L83/04C08L71/12C08K5/00C08K5/544C08K5/5313C08K5/5425C08K5/5435C08K5/134C08K5/526B29B9/06B29B13/06B29C45/76B29C45/77B29C45/78B29C47/92B29C48/92
CPCC08L69/00B29B9/06B29B13/065B29C45/76B29C45/77B29C45/78B29C48/92B29C2945/76498B29C2945/76531B29C2945/76561B29C2945/76595B29C2948/92209C08K2201/013C08L51/08C08L2201/02C08L2205/035C08L83/04C08L71/12C08K5/00C08K5/544C08K5/5313C08K5/5425C08K5/5435C08K5/1345C08K5/526
Inventor 袁伟忠黄薇薇
Owner TONGJI UNIV