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Impact-resistant polybutylene terephthalate (PBT) material and preparation method thereof

An impact-resistant, glass fiber technology, applied in the field of plastic materials, can solve the problems of glass fiber exposure, mechanical processing equipment wear, notch sensitivity, etc., and achieve the effect of improving notch impact strength

Inactive Publication Date: 2017-07-07
苏州纳贝通环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, PBT is widely used for its excellent mechanical properties, electrical properties, heat resistance and processing properties, but it still has some shortcomings in some physical and mechanical properties, for example, it is very sensitive to notches, and the notch impact strength is low. , which is its main shortcoming as an engineering plastic, and insufficient toughness has also become a major obstacle to the popularization and application of PBT.
Glass fiber has high tensile strength and high elastic modulus, and because of its cheap price and easy availability of raw materials, it has been widely used to fill PBT to improve heat resistance and mechanical properties, but glass fiber reinforced PBT also has glass fiber exposed, products Disadvantages such as rough surface and serious wear of machining equipment
Therefore, the conditions of the processing technology are limited so that the mechanical properties of the material are affected

Method used

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  • Impact-resistant polybutylene terephthalate (PBT) material and preparation method thereof

Examples

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Embodiment 1

[0016] A method for preparing an impact-resistant PBT material, comprising the following steps: (1) Firstly, the glass fiber is treated at a high temperature of 400°C for 1 hour, and immersed in an aqueous solution of silane coupling agent SG-Si900 with a mass fraction of 0.6% at a mass ratio of 1:10 Stir at 60°C for 2 hours, wash and dry at 60°C, then immerse in 0.6% LaCl 3 In the aqueous solution for 1 hour, take it out and dry it at 120°C for 4 hours; (2) Weigh the following ingredients by weight: 85 parts of polybutylene terephthalate, 25 parts of hyperbranched polyester, 13 parts of maleopimaric anhydride, rare earth 16 parts of modified glass fiber, 3 parts of ethylene-acrylate-glycidyl methacrylate, 0.5 parts of antioxidant 1010, 1.2 parts of antioxidant 168, 16 parts of bisphenol A-bis(diphenyl phosphate) (3) Dry the polybutylene terephthalate in a constant temperature blast oven at 120°C for 24 hours, and dry the dried polybutylene terephthalate, hyperbranched polyest...

Embodiment 2

[0018] A method for preparing an impact-resistant PBT material, comprising the following steps: firstly treating glass fibers at a high temperature of 400°C for 1 hour, and immersing them in an aqueous solution of silane coupling agent SG-Si900 with a mass fraction of 1.5% at a mass ratio of 1:10 at 60 Stir at ℃ for 2h, wash and dry at 60℃, then immerse in 0.1% LaCl 3 In the aqueous solution for 1 hour, take it out and dry it at 120°C for 4 hours; (2) Weigh the following ingredients by weight: 110 parts of polybutylene terephthalate, 40 parts of hyperbranched polyester, 5 parts of maleopimaric anhydride, rare earth 25 parts of modified glass fiber, 9 parts of ethylene-acrylate-glycidyl methacrylate, 1.2 parts of antioxidant 1010, 0.5 parts of antioxidant 168, 10 parts of bisphenol A-bis(diphenyl phosphate) (3) Dry the polybutylene terephthalate in a constant temperature blast oven at 120°C for 24 hours, and dry the dried polybutylene terephthalate, hyperbranched polyester, Ac...

Embodiment 3

[0020] A method for preparing an impact-resistant PBT material, comprising the following steps: firstly treating the glass fiber at a high temperature of 400°C for 1 hour, and then immersing the glass fiber in an aqueous solution of silane coupling agent SG-Si900 with a mass fraction of 0.8% at 60°C at a mass ratio of 1:10. Stir at ℃ for 2h, wash and dry at 60℃, then immerse in 0.3% LaCl 3 In the aqueous solution for 1 hour, take it out and dry it at 120°C for 4 hours; (2) Weigh the following ingredients by weight: 95 parts of polybutylene terephthalate, 30 parts of hyperbranched polyester, 10 parts of maleopimaric anhydride, rare earth 19 parts of modified glass fiber, 7 parts of ethylene-acrylate-glycidyl methacrylate, 0.8 parts of antioxidant 1010, 1 part of antioxidant 168, 12 parts of bisphenol A-bis(diphenyl phosphate) (3) Dry the polybutylene terephthalate in a constant temperature blast oven at 120°C for 24 hours, and dry the dried polybutylene terephthalate, hyperbran...

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Abstract

The invention provides an impact-resistant polybutylene terephthalate (PBT) material and a preparation method thereof. The preparation method comprises the following steps of (1) preparing rare earth modified glass fibers; (2) weighing the following components in parts by weight: 85-110 parts of PBT, 25-40 parts of hyperbranched polyester, 5-13 parts of maleopimaric anhydride, 16-25 parts of the rare earth modified glass fibers, 3-9 parts of ethylene-acrylate-glycidyl methacrylate, 0.5-1.2 parts of an antioxidant 1010, 0.5-1.2 parts of an antioxidant 168 and 10-16 parts of bisphenol A bis (diphenyl phosphate); (3) mixing all the components; (4) extruding and granulating by using a screw extruder, carrying out air blast drying, and then carrying out injection molding on the product in an injection molding machine so as to obtain standard sample strips. The impact-resistant PBT material can be prepared without needing to adjust the technological parameters and processing conditions of the machine; the mechanical properties of the prepared PBT material are greatly improved.

Description

technical field [0001] The invention relates to the field of plastic materials, in particular to an impact-resistant PBT material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT for short) is an engineering plastic first developed in the United States in the 1970s. It is a crystalline linear saturated polyester resin. Some application examples of PBT in the industry show its irreplaceable superiority in some aspects. It is following polyamide (PA), polycarbonate (PC), polyoxymethylene (POM) and modified polyphenylene ether ( It is the fifth largest general-purpose engineering plastic after MPPO), and has been widely used in many fields. For example, in the electrical and electronic aspects, it is used as connectors, transformers, switches, relays, energy-saving lamp lamp holders, coil skeletons, motor casings, etc.; in the automotive industry, it is used as fenders, ignition and heater switches, motor brush handles, Fuse boxe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/00C08L23/08C08K13/06C08K9/06C08K9/02C08K7/14C08K5/134C08K5/526C08K5/523B29B9/06B29C47/92B29C45/78B29C48/92
CPCC08L67/02B29B9/06B29C45/78B29C48/92B29C2945/76531B29C2948/92704C08L2205/02C08L2205/03C08L67/00C08L23/0884C08K13/06C08K9/06C08K9/02C08K7/14C08K5/1345C08K5/526C08K5/523
Inventor 潘明华
Owner 苏州纳贝通环境科技有限公司