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Low-odor and high-wear-resistant PET composition and preparation method thereof

A low-odor, composition technology, applied in the polymer field, can solve the problems of poor corona resistance, limited application of polyethylene terephthalate, etc., achieve excellent mechanical properties, avoid serious performance degradation, and melt and mix smoothly. Effect

Active Publication Date: 2018-12-04
HEFEI GENIUS NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyethylene terephthalate has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C. It has excellent electrical insulation. Even at high temperature and high frequency, its electrical properties are still good. However, the corona resistance is poor, and the creep resistance, fatigue resistance and dimensional stability are good
[0004] Although polyethylene terephthalate has many excellent properties, the application of polyethylene terephthalate will be greatly restricted in some fields that require high odor and wear resistance

Method used

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  • Low-odor and high-wear-resistant PET composition and preparation method thereof

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preparation example Construction

[0031] Preparation of odor adsorption masterbatch: 100 parts of high-density polyethylene, 5 parts of hydrophobic diatomaceous earth, 10 parts of hydrophobic activated carbon, 5 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano-silica, hard 1 part of calcium fatty acid and 5 parts of melamine were mixed evenly, and then extruded and granulated in a twin-screw extruder to obtain odor-absorbing masterbatches.

[0032] The number-average molecular weight of polytetrafluoroethylene is 3 million, and the elongation at break is 3%-10%.

[0033] The crystallinity of high-density polyethylene is 85%, and the number average molecular weight is 250,000.

[0034] The melt index of polyethylene terephthalate is 25-28g / 10min; the melt index of polypropylene terephthalate is 28-30g / 10min.

Embodiment 1

[0036] 70 parts of polyethylene terephthalate, 1 part of polytrimethylene terephthalate, 1 part of ethylene grafted maleic anhydride, 3 parts of odor absorption masterbatch, 0.5 part of molybdenum disilicide, 1 part of silicone powder , 0.5 parts of antioxidant 1098, and 0.5 parts of antioxidant 168 are poured into a high-speed mixer, stirred at a high speed, mixed until uniform, and then added to a twin-screw extruder, and 30 parts of polytetrafluoroethylene modified glass fibers are fed from the glass fiber port Adding, melting and extruding and then granulating to prepare a polyethylene terephthalate composition with low odor, low emission and high wear resistance.

[0037] The temperature of the first zone of the twin-screw extruder is 180°C, the temperature of the second zone is 180°C, the temperature of the third zone is 190°C, the temperature of the fourth zone is 210°C, the temperature of the fifth zone is 230°C, and the temperature of the sixth zone is 245°C; Twin-scr...

Embodiment 2

[0039] 54 parts of polyethylene terephthalate, 2 parts of polytrimethylene terephthalate, 2 parts of ethylene grafted maleic anhydride, 1 part of odor absorption masterbatch, 0.2 part of molybdenum disilicide, 0.2 part of silicone powder , 0.1 part of antioxidant 1098, and 0.1 part of antioxidant 168 are poured into a high-speed mixer, stirred at a high speed, mixed until uniform, and then added to a twin-screw extruder, and 30 parts of polytetrafluoroethylene modified glass fibers are fed from the glass fiber port Adding, melting and extruding and then granulating to prepare a polyethylene terephthalate composition with low odor, low emission and high wear resistance.

[0040] The temperature of the first zone of the twin-screw extruder is 190°C, the temperature of the second zone is 190°C, the temperature of the third zone is 200°C, the temperature of the fourth zone is 220°C, the temperature of the fifth zone is 300°C, and the temperature of the sixth zone is 300°C; Twin-sc...

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Abstract

The invention provides a low-odor and high-wear-resistant PET composition and a preparation method thereof, wherein the low-odor and high-wear-resistant PET composition is prepared from the followingcomponents in parts by weight: polyethylene glycol terephthalate, polypropylene glycol terephthalate, ethylene grafted maleic anhydride, polytetrafluoroethylene modified glass fibers, an odor adsorption masterbatch, molybdenum disilicide, a lubricant and an antioxidant. The glass fibers impregnated with polytetrafluoroethylene greatly improve the dispersion in a matrix, the wear resistance of theprepared composition is improved remarkably, and excellent mechanical properties are maintained. In addition, the odor adsorption masterbatch reduces the small molecular content in the composition, and the total volatile organic compounds TVOC are reduced remarkably; moreover, while the low odor characteristics of the composition are guaranteed, the physical and mechanical properties and the forming and processing properties of the material are not affected.

Description

technical field [0001] The invention relates to the technical field of macromolecules, in particular to a PET composition with low odor and high abrasion resistance and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is synthesized from bishydroxyethyl terephthalate by transesterification of dimethyl terephthalate and ethylene glycol or by esterification of terephthalic acid and ethylene glycol. Then proceed to polycondensation reaction. It is a crystalline saturated polyester, a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface, and is a common resin in daily life. [0003] Polyethylene terephthalate has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C. It has excellent electrical insulation. Even at high temperature and high frequency, its electrical properties are still good. However, the corona resistance is poor, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/06C08K13/06C08K9/04C08K7/14C08K3/36C08K3/04C08K5/098C08K5/3492C08K3/34C08K7/26B29C47/92B29C48/92
CPCC08L67/02C08K2201/014C08K2201/011C08L2205/035C08L2205/025C08L23/06C08K13/06C08K9/08C08K7/14C08K3/36C08K3/04C08K5/098C08K5/34922C08K3/34C08K7/26
Inventor 杨桂生吴安琪范继贤费彬
Owner HEFEI GENIUS NEW MATERIALS
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