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Glass-fiber-reinforced hydrolysis-resistant polyester material and preparation method thereof

A technology of glass fiber and polyester materials, which is applied in the field of modified polyester materials and their preparation, can solve the problems of not being able to know the hydrolysis resistance performance, and the method of hydrolysis resistance performance has not been improved, etc., and achieve excellent processing performance, low cost, good fluidity

Inactive Publication Date: 2012-10-03
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document CN 200710125558.2, published on July 16, 2008, discloses an environmentally friendly flame-retardant glass fiber reinforced polyester alloy material and its preparation method. The polyester alloy material is composed of the following raw materials by weight: polycarbonate 50-70%, polyester 10-40%, compatibilizer 3-5%, flame retardant 3-6%, antioxidant 0.1- 1%, lubricant 0.3-1%, glass fiber 3.5-10%; its preparation method is to use polycarbonate, linear saturated polyester as the base resin, add compatibilizer, flame retardant, antioxidant, lubricant, Glass fiber is granulated by a twin-screw extruder. The polycarbonate alloy material has a high surface brightness, but its hydrolysis resistance cannot be known; Chinese patent document CN 2011102636.7.5, application date September 7, 2011 , discloses a flame-retardant glass fiber-reinforced PET / PTT / PBT alloy material and its preparation method. The raw materials used and their parts by weight are: 10-30 parts of PET, 10-30 parts of PTT, 20-40 parts of PBT, and 3-10 parts of compatibilizer, 5-20 parts of composite flame retardant, 0.1-0.5 parts of antioxidant, 0.1-0.5 parts of lubricant, 10-30 parts of glass fiber, the alloy material has excellent flame retardant performance, low shrinkage, Dimensional stability, high surface gloss, but no improvement in hydrolysis resistance
At present, there are no reports on glass fiber reinforced polyester materials with excellent hydrolysis resistance.

Method used

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  • Glass-fiber-reinforced hydrolysis-resistant polyester material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 Preparation of polyester material of the present invention (1)

[0043] (1) Weigh the following raw materials by weight percentage: PBT 60%, glass fiber ECS13-4.5-534A 30%, compatibilizer AX8900 3.8%, carbodiimide 0.5%, epoxy resin 5%, antioxidant 1098 0.2 %, antioxidant 168 0.2%, lubricant MB-4 0.3%;

[0044] (2) Bake the PBT weighed in step 1) at 110°C for 8 hours;

[0045] (3) Put all raw materials into a high-efficiency mixer and mix for 8 minutes before discharging;

[0046] (4) Put the mixed raw materials in step 3 into a twin-screw extruder to melt, knead, extrude and water-cool, then dry, cut into pellets, and pack. The speed of the screw machine is 260 rpm. The temperature of each section of the barrel of the twin-screw extruder is 235-255°C.

Embodiment 2

[0047] Embodiment 2 Preparation of polyester material of the present invention (2)

[0048](1) Weigh the following raw materials by weight percentage: PBT 40%, PET 20%, glass fiber ECS13-4.5-534A 30%, compatibilizer AX8900 3.8%, carbodiimide 0.5%, isocyanate 5%, antioxidant 1098 0.2%, antioxidant 168 0.2%, lubricant TAF 0.3%;

[0049] (2) Bake the PBT and PET weighed in step 1) at 110°C for 8 hours;

[0050] (3) Put all raw materials into a high-efficiency mixer and mix for 5 minutes before discharging;

[0051] (4) Put the mixed raw materials in step 3 into a twin-screw extruder to melt, knead, extrude and water-cool, then dry, cut into pellets, and package. The screw machine rotates at 500 rpm. The temperature of each section of the barrel of the twin-screw extruder is 235-255°C.

Embodiment 3

[0052] Example 3 Preparation of polyester material of the present invention (3)

[0053] (1) Weigh the following raw materials by weight percentage: PET 70%, glass fiber ECS13-4.5-534A 15%, compatibilizer PTW 10%, cyclic anhydride 2%, oxazole derivative 2.5%, antioxidant 1098 0.1% , antioxidant 168 0.1%, lubricant TAF 0.2%, lubricant MB-4 0.1%;

[0054] (2) Dry the PET weighed in step 1) at 110°C for 7.5 hours;

[0055] (3) Put all raw materials into a high-efficiency mixer and mix for 10 minutes before discharging;

[0056] (4) Put the mixed raw materials in step 3 into a twin-screw extruder to melt, knead, extrude and water-cool, then dry, cut into pellets, and package. The screw machine rotates at 180 rpm. The temperature of each section of the barrel of the twin-screw extruder is 235-255°C.

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Abstract

The invention provides a glass-fiber-reinforced hydrolysis-resistant polyester material which is prepared from the following raw materials in percentage by weight: 30-80% of polyester, 5-40% of glass fiber, 3-10% of compatilizer, 0.3-20% of hydrolytic reagent, 0.1-0.5% of antioxidant and 0.1-0.5% of lubricant. The invention also provides a preparation method of the glass-fiber-reinforced hydrolysis-resistant polyester material, which comprises the following steps: mixing the raw materials according to the percentage by weight, putting in a screw rod machine, extruding, and cooling with water to granulate, wherein the rotation speed of the screw rod machine is 180-600 rpm, and the temperature is 235-255 DEG C. The material provided by the invention has the advantages of better mechanical properties, high hydrolysis resistance, high mechanical property retentivity, favorable flowability, fewer surface floating fibers, excellent processability and low cost, and has very wide application prospects in the fields of electronics, electricity, automobiles, home appliances and the like.

Description

technical field [0001] The invention relates to a modified polyester material and a preparation method thereof, in particular to a glass fiber reinforced hydrolysis-resistant polyester material and a preparation method thereof. Background technique [0002] Polyester materials have the advantages of outstanding chemical resistance, heat resistance, excellent mechanical strength, electrical insulation properties and thermal stability, but they have the disadvantage of notch impact sensitivity, and glass fiber reinforced polyester materials make up for it. Overcoming this defect of polyester materials makes it widely used in the fields of electronics, automobiles, and home appliances. Due to the low water absorption rate of polyester materials, it can still work normally and stably in relatively humid environments. Degradation will occur, and the acid produced in the degradation process will further catalyze the degradation and corrosion of the polyester material, causing a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08J5/04
Inventor 才勇孟成銘王尹杰张强
Owner SHANGHAI SUNNY
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