Low-warpage polybutylene terephthalate (PBT) composite material with stable size, and preparation method of composite material

A composite material and dimensionally stable technology, applied in the field of plastics, can solve the problems of inconsistent longitudinal and transverse shrinkage, product warping, etc., and achieve the effects of improving flow performance, preventing warping, and improving stability

Inactive Publication Date: 2019-09-17
NANTONG KEPOLY ENG PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the longitudinal and transverse shrinkage of the product after glass fiber reinforcement is inconsistent, which may easily cause the product to warp

Method used

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  • Low-warpage polybutylene terephthalate (PBT) composite material with stable size, and preparation method of composite material
  • Low-warpage polybutylene terephthalate (PBT) composite material with stable size, and preparation method of composite material
  • Low-warpage polybutylene terephthalate (PBT) composite material with stable size, and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A preparation method of dimensionally stable and low warpage PBT composite material, wherein the preparation method comprises the steps of:

[0035] 1) Polybutylene terephthalate, polyether ether ketone, maleic anhydride grafted polyethylene, myristyl myristate, carboxylated nitrile latex, chlorinated polyethylene, calcium stearate, ethylene-acrylic acid Copolymer, N-benzylamine phenylenediamine, thiobisphenol, zeolite, oleic acid, and cobalt oxide are stirred and mixed to obtain the first mixture; 2) the above-mentioned mixed materials are put into a twin-screw extruder, and melted, kneaded, Extruding, cooling, drying, pelletizing and packaging to obtain the PBT composite material.

Embodiment 1

[0038] A dimensionally stable and low-warp PBT composite material, comprising the following materials in parts by weight:

[0039]

[0040] Toughening agent includes 30wt% carboxyl nitrile latex and 70wt% chlorinated polyethylene; Dispersant includes 60wt% calcium stearate and 40wt% ethylene-acrylic acid copolymer; Antioxidant includes 20wt% N-benzylamine phenylenediamine and 80 wt% thiobisphenol; the particle diameter of zeolite is 60nm; the number average molecular weight of polyether ether ketone is 3200.

[0041] A preparation method of a dimensionally stable and low warpage PBT composite material, the preparation method comprising the steps of:

[0042]1) Polybutylene terephthalate, polyether ether ketone, maleic anhydride grafted polyethylene, myristyl myristate, carboxylated nitrile latex, chlorinated polyethylene, calcium stearate, ethylene-acrylic acid Copolymer, N-benzylamine phenylenediamine, thiobisphenol, zeolite, oleic acid, and cobalt oxide are stirred and m...

Embodiment 2

[0044] A dimensionally stable and low-warp PBT composite material, comprising the following materials in parts by weight:

[0045]

[0046] Toughening agent includes 32wt% carboxyl nitrile latex and 68wt% chlorinated polyethylene; Dispersant includes 63wt% calcium stearate and 37wt% ethylene-acrylic acid copolymer; Antioxidant includes 24wt% N-benzylamine phenylenediamine and 76 wt% thiobisphenol; the particle size of zeolite is 70nm; the number average molecular weight of polyether ether ketone is 3300.

[0047] A preparation method of a dimensionally stable and low warpage PBT composite material, the preparation method comprising the steps of:

[0048] 1) Polybutylene terephthalate, polyether ether ketone, maleic anhydride grafted polyethylene, myristyl myristate, carboxylated nitrile latex, chlorinated polyethylene, calcium stearate, ethylene-acrylic acid Copolymer, N-benzylamine phenylenediamine, thiobisphenol, zeolite, oleic acid, and cobalt oxide are stirred and mixe...

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Abstract

The invention discloses a low-warpage polybutylene terephthalate (PBT) composite material with stable size. The composite material is prepared from the following raw materials in parts by weight: 60-80 parts of polybutylene terephthalate, 12-15 parts of polyetheretherketone, 8-10 parts of maleic anhydride grafted polyethylene, 2-4 parts of a toughening agent, 1-3 parts of an antioxidant, 2-4 parts of a dispersing agent and 3-5 parts of myristyl myristate. The low-warpage PBT composite material with stable size is prepared by optimizing chemical components, so that the internal structure of PBT plastic is improved on a microcosmic level; the composite material is excellent in mechanical properties, heat resistance and warping resistance.

Description

technical field [0001] The invention relates to a plastic, in particular to a dimensionally stable and low warpage PBT composite material and a preparation method thereof. Background technique [0002] PBT (Polybutylene Terephthalates) is the latest and fastest-growing variety of general engineering plastics. Although it was not industrialized until the 1970s, due to its excellent comprehensive performance and good Excellent formability and excellent cost performance, it will soon sell well in the market. PBT has high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, low water absorption, and maintains various physical properties (including electrical properties) and electrical insulation in a humid environment. Crystalline, good formability. In the field of automobile manufacturing, PBT is widely used in the production of carburetor components, fenders, spark plug terminal boards and other components. [0003]...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L61/16C08L51/06C08L13/02C08L23/28C08L23/08C08K5/098C08K5/18C08K7/26C08K3/22C08K13/04
CPCC08K2003/2289C08L67/02C08L2201/08C08L2205/035C08L61/16C08L51/06C08L13/02C08L23/286C08L23/0869C08K5/098C08K5/18C08K7/26C08K3/22C08K13/04
Inventor 张翠娥沈彬盛高飞
Owner NANTONG KEPOLY ENG PLASTICS CO LTD
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