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

A technology of ethylene phthalate and engineering plastics, which is applied in the field of halogen-free and antimony-free flame-retardant polyethylene terephthalate engineering plastics and its preparation, and can solve the problem that it is not suitable for the recycling and preparation of electronic and electrical products. The process is cumbersome and other problems, to achieve the effect of excellent thermal stability, convenient preparation and high CTI value

Active Publication Date: 2012-01-18
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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  • Halogen-free stibium-free antiflaming polydiethylene terephthalate engineering plastics and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051](1) blow drying polyethylene terephthalate at 120° C. for 4 hours;

[0052] (2) 48 g of dried polyethylene terephthalate (intrinsic viscosity: 0.6 dl / g), 5 g of maleic anhydride grafted polyolefin elastomer as toughener, and 5 g of phosphorus-based flame retardant resorcinol Condensed 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-hydroxy-3 , 0.2 g of n-octadecyl 5-di-tert-butylphenyl) propionate was added to the mixer successively, and the mixture was stirred and mixed for 3 minutes at a rotating speed of 400 rev / min to obtain a mixture;

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

Embodiment 2

[0072] (1) blow drying polyethylene terephthalate at 120° C. for 4 hours;

[0073] (2) 39 g of dried polyethylene terephthalate (intrinsic viscosity: 1.0 dl / g), 5 g of acrylic acid ester-glycidyl ester-ethylene copolymer as a toughening agent, and triphenyl phosphate as a phosphorus-based flame retardant Ester 8g, nitrogen-based flame retardant ammonium polyphosphate 6g, synergistic flame retardant nanoclay (50nm 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 successively, and the mixture was stirred and mixed for 3 minutes at a rotating speed of 400 rev / min to obtain a mixture;

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

Embodiment 3

[0093] (1) blow drying polyethylene terephthalate at 100° C. for 6 hours;

[0094] (2) Mix 65 g of dried polyethylene terephthalate (intrinsic viscosity: 0.8 dl / g), 5 g of phosphorus-based flame retardant tricresyl phosphate, 8 g of nitrogen-based flame retardant melamine cyanurate, The effective flame retardant nanoclay (particle size is 80nm) 1.5g, the nucleating agent zinc oxide 0.3g and the antioxidant tris(2,4-di-tert-butylphenyl) phosphite 0.2g were added to the mixer in turn, Stir and mix for 3 minutes at a speed of 400 rpm 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 then melt and extrude it. After granulation, the finished product of halogen-free and antimony-free flame-retardant polyethylene terephthalate engineering plastic is obtained;

[0096] ...

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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, in particular to a halogen-free and 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 inexpensive. Its glass fiber reinforced products have excellent physical and chemical properties, heat resistance and electrical properties, which are comparable to those of similar polybutylene terephthalate (PBT). ) and nylon (PA) materials, the comprehensive performance of glass fiber reinforced PET is better than PBT, close to PA, but the price is more advantageous. Through the addition of nucleating agent and crystallization accelerator, the disadvantages of slow crystallization and long molding cycle of PET can be improved, making PET gradually become one of the most popular materials in enginee...

Claims

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Application Information

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