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

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...

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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.

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