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Halogen-free stibium-free antiflaming polydiethylene terephthalate engineering plastics and method for preparing same

A technology of polyethylene terephthalate and polyethylene terephthalate, which is applied in the field of halogen-free, antimony-free, flame-retardant polyethylene terephthalate engineering plastics and its preparation, and can solve the preparation process Complicated, not suitable for the recycling of electronic and electrical products, etc., to achieve the effect of convenient preparation, excellent thermal stability, and no need for mold temperature molding processing

Active Publication Date: 2010-07-07
GUANGZHOU SUPER DRAGON ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is relatively cumbersome, and different components need to be pretreated and made into masterbatches before secondary processing
At the same time, the antimony oxide contained in the system will cause thermal degradation of PET resin, which is not suitable for recycling in electronic and electrical products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051](1) The polyethylene terephthalate was air-dried at 120° C. for 4 hours;

[0052] (2) 48g of dried polyethylene terephthalate (intrinsic viscosity is 0.6dl / g), 5g of toughening agent maleic anhydride grafted polyolefin elastomer, phosphorus-based flame retardant resorcinol Polycondensation aryl phosphate 8g, nitrogen-based flame retardant melamine 6g, synergistic flame retardant nanoclay (particle size is 100nm) 2.5g, nucleating agent sodium benzoate 0.3g and antioxidant β-(4-hydroxyl-3 , 0.2 g of n-octadecyl 5-di-tert-butylphenyl)propionate was added to the mixer in turn, and stirred and mixed for 3 minutes at a speed of 400 rpm to obtain a mixture;

[0053] (3) Add the mixture obtained in step (2) into a twin-screw extruder, and then pass 30 g of alkali-free long glass fibers treated with a reinforcing agent siloxane coupling agent through a glass fiber dryer (drying temperature 160 ° C, drying cylinder length 1.5m) after drying, introduce it into the extruder from th...

Embodiment 2

[0072] (1) The polyethylene terephthalate was air-dried at 120° C. for 4 hours;

[0073] (2) 39g of dried polyethylene terephthalate (intrinsic viscosity is 1.0dl / g), 5g of toughening agent acrylate-glycidyl-ethylene copolymer, phosphorus-based flame retardant triphenyl phosphate Ester 8g, nitrogen-based flame retardant ammonium polyphosphate 6g, synergistic flame retardant nanoclay (50nm in particle size) 1.5g, nucleating agent talc 0.3g and antioxidant tetrakis (3,5-di-tert-butyl Base-4-4 hydroxyphenyl) 0.2g was added to the mixer in turn, and stirred and mixed for 3 minutes at a speed of 400 rpm to obtain a mixture;

[0074] (3) Add the mixture obtained in step (2) into a twin-screw extruder, and then pass 40 g of alkali-free long glass fibers treated with a reinforcing agent siloxane coupling agent through a glass fiber dryer (drying temperature 170 ° C, drying cylinder length 1.0m) after drying, introduce it into the extruder from the glass fiber port, melt and extrude a...

Embodiment 3

[0093] (1) polyethylene terephthalate was air-dried at 100° C. for 6 hours;

[0094] (2) 65g of dried polyethylene terephthalate (intrinsic viscosity is 0.8dl / g), 5g of phosphorus-based flame retardant tricresyl phosphate, 8g of nitrogen-based flame retardant melamine cyanurate, and Effective flame retardant nanoclay (particle size is 80nm) 1.5g, nucleating agent zinc oxide 0.3g and antioxidant three (2,4-di-tert-butylphenyl) phosphite 0.2g add in the mixer successively, in Stirring and mixing at a speed of 400 rpm for 3 minutes to obtain a mixture;

[0095] (3) Add the mixture obtained in step (2) into the twin-screw extruder, and then introduce 20 g of the short glass fiber of the reinforcing agent after drying (drying at 150°C for 2 hours) into the extruder from the glass fiber port, and melt extrude Pelletizing to obtain finished products of halogen-free, antimony-free, flame-retardant polyethylene terephthalate engineering plastics;

[0096] The processing conditions of...

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Abstract

The invention discloses halogen-free stibium-free antiflaming polydiethylene terephthalate engineering plastics and a method for preparing the same. The plastics consist of the following components in percentage by weight: 39 to 65 percent of polydiethylene terephthalate, 15 to 40 percent of reinforcing agent, 0 to 8 percent of toughening agent, 5 to 8 percent of phosphorus flame retardant, 0 to 8 percent of nitrogen flame retardant, 0 to 4 percent of synergetic flame retardant, 0 to 0.5 percent of nucleating agent and 0 to 0.5 percent of antioxidant. In the preparation method, the phosphorus-nitrogen antiflaming system is combined with the nanometer clay, so that while the halogen-free stibium-free flame retardation of the compound material is realized, the higher CTI value of the antiflaming material is ensured; the plastics are applicable in the field of electric appliances; and the method for preparing the material is simple and avoids adopting mould temperature forming processing, and the compound material possesses excellent thermal stability and therefore can be recycled.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a halogen-free, antimony-free, flame-retardant polyethylene terephthalate engineering plastic with high CTI value for electronic appliances and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) has a wide range of sources and is cheap. Its glass fiber reinforced products have excellent physical and chemical properties, heat resistance and electrical properties, and are comparable to similar polybutylene terephthalate (PBT) ), nylon (PA) materials, the overall performance of glass fiber reinforced PET is better than PBT, close to PA, but the price is more advantageous. The disadvantages of slow crystallization and long molding cycle of PET can be improved by adding nucleating agent and crystallization accelerator, making PET gradually become one of the most popular materials in engineering plastics. [0003] By addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/06C08K13/06C08K5/523C08K5/3492C08K3/34C08K7/14C08K3/32C08K5/521B29B9/06B29C47/92B29C48/40B29C48/92
CPCB29C48/40
Inventor 余鹏郝源增郝建鑫任萍
Owner GUANGZHOU SUPER DRAGON ENG PLASTICS
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