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High-performance flame-retardant reinforced hydrolysis-resistant PBT (polybutylene terephthalate) material and preparation method thereof

A hydrolysis-resistant, high-performance technology, applied in the field of PBT materials and its preparation, can solve problems such as ester bond breakage and unsuitable PBT materials, and achieve the effects of easy operation, excellent comprehensive performance, and improved hydrolysis resistance

Inactive Publication Date: 2014-01-22
QINGDAO XINZHAN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since PBT materials contain ester bonds in their molecules, the ester bonds will be broken when placed in water at a temperature higher than the glass transition temperature. The acidic environment formed by the hydrolysis reaction will accelerate the hydrolysis reaction, and the performance will drop sharply, which will affect the hydrolysis of PBT materials. The main factor is the concentration of terminal carboxyl groups. Usually, carbodiimide is used as a hydrolysis stabilizer to improve the hydrolysis resistance of PBT materials by capturing water and acid, reducing the content of terminal carboxyl groups and increasing viscosity, but adding acid resistance to PBT materials When the flame retardant improves its flame retardancy, it will cause various reactions between carbodiimide and acid flame retardant, which will have adverse effects. Therefore, it is not very good to add carbodiimide as a hydrolysis stabilizer to PBT materials using acid flame retardants. Suitable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-performance flame-retardant reinforced hydrolysis-resistant PBT material, the composition of which is: PBT 50%, decabromodiphenyl ether 10%, antimony trioxide 6%, glass fiber 30%, silane coupling Additive 1%, acrylate multipolymer LP2500 1%, hindered phenol antioxidant KY-1076 and phosphite antioxidant JC-242 compound 0.3%, maleic anhydride grafted POE 0.7%, OP wax 1 %.

[0021] Preparation method: (1) Weigh and batch the above-mentioned components in proportion; (2) Dry PBT at 120°C-130°C for 4-6 hours, control the moisture content below 0.03%, and dry it for later use; (3 ) Add the dried PBT and acrylate multi-polymer copolymer LP2500, the compound of hindered phenol antioxidant KY-1076 and phosphite antioxidant JC-242, maleic anhydride grafted POE and OP wax into the mixing tank (4) Add the mixture obtained in step polymerization (3) into a twin-screw extruder, melt and knead, extrude and granulate, and the extrusion temperature is 200°C to 260°C; (5) After ...

Embodiment 2

[0023] A high-performance flame-retardant reinforced hydrolysis-resistant PBT material, the composition of which is: 45% PBT, 8% tetrabromobisphenol A, 4% antimony trioxide, 35% glass fiber, silane coupling 1.5% acrylate multi-polymer copolymer LP2500 1.5%, hindered phenol antioxidant KY-1076 and phosphite antioxidant JC-242 compound 0.5%, glycidyl methacrylate grafted POE 4%, Polyethylene wax 0.5%.

[0024] Preparation method: (1) Weigh and batch the above-mentioned components in proportion; (2) Dry PBT at 120°C-130°C for 4-6 hours, control the moisture content below 0.03%, and dry it for later use; (3 ) After drying, the compound of PBT and acrylate multi-polymer copolymer LP2500, hindered phenol antioxidant KY-1076 and phosphite antioxidant JC-242, glycidyl methacrylate grafted POE and polyethylene Add the wax into the mixing tank, stir to make it fully mixed; (4) Put the mixture obtained in step polymerization (3) into the twin-screw extruder, melt and knead, extrude and ...

Embodiment 3

[0026] A high-performance flame-retardant reinforced hydrolysis-resistant PBT material, the composition of which is: 60% PBT, 10% 2,6-dibromophenylene ether, 5% antimony trioxide, and 20% glass fiber , silane coupling agent 0.5%, acrylate multi-polymer copolymer LP2500 1%, hindered phenol antioxidant KY-1076 and phosphite antioxidant JC-242 compound 0.3%, ethylene-butyl acrylate-shrink Glyceride terpolymer 2.5%, calcium stearate 0.7%.

[0027] Preparation method: (1) Weigh and batch the above-mentioned components in proportion; (2) Dry PBT at 120°C-130°C for 4-6 hours, control the moisture content below 0.03%, and dry it for later use; (3 ) After drying, the compound of PBT and acrylate multipolymer LP2500, hindered phenol antioxidant KY-1076 and phosphite antioxidant JC-242, terpolymer of ethylene-butyl acrylate-glycidyl ester Add the compound and calcium stearate into the mixing tank, stir to make it fully mixed; (4) Add the compound obtained in step polymerization (3) into...

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Abstract

The invention discloses a high-performance flame-retardant reinforced hydrolysis-resistant PBT (polybutylene terephthalate) material and a preparation method thereof. The high-performance flame-retardant reinforced hydrolysis-resistant PBT material comprises the following components in percentage by mass: 45-60% of PBT, 5-10% of flame retardant, 1-10% of antimony trioxide, 20-35% of glass fiber, 0.2-1.5% of coupling agent, 0.1-2% of chain extender, 0.2-0.5% of antioxidant, 0.5-5% of toughener and 0.3-1% of lubrication dispersing agent. According to the invention, on the basis of performing glass fiber reinforced flame retardance on the PBT material, a proper amount of chain extender is added, thus greatly reducing the terminal carboxyl content of the PBT, and enhancing the hydrolysis resistance, compatibility and toughening and reinforcing performance of the PBT. The preparation method provided by the invention adopts a secondary extrusion process, and the PBT material meeting flame-retardant and hydrolysis-resistant requirements and having excellent comprehensive performance can be obtained; and the preparation process is simple and easy to operate.

Description

Technical field [0001] The invention relates to a PBT material and a preparation method thereof, specifically a high-performance flame retardant enhanced hydrolysis-resistant PBT material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is widely used in automobiles, machinery and equipment, and electronic and electrical manufacturing industries for its excellent heat resistance, fatigue resistance, weather resistance, toughness, low friction coefficient and other properties. It has become an important member of the five major engineering plastics. However, because PBT materials contain ester bonds in their molecules, the ester bonds will break when placed in water at a temperature higher than the glass transition temperature. The acidic environment formed by the hydrolysis reaction accelerates the hydrolysis reaction and causes a sharp decline in performance, which is the most important factor affecting the hydrolysis of PBT m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L33/04C08K13/04C08K7/14C08K3/22C08K5/06C08K5/136B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92561B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 不公告发明人
Owner QINGDAO XINZHAN PLASTIC
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