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Toughened and modified PBT resin and preparation method thereof

A PBT resin, toughening modification technology, applied in the field of toughening modified PBT resin and its preparation, can solve the problems of limited toughening effect of PBT, poor compatibility, weak interface bonding, etc.

Active Publication Date: 2021-05-11
NINGBO NENGZHIGUANG NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of SEBS to toughen PBT also has the following problems: the compatibility of SEBS with PBT is poor, the interfacial bonding is weak, and it is difficult to disperse uniformly in PBT, resulting in limited toughening effect on PBT

Method used

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  • Toughened and modified PBT resin and preparation method thereof

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preparation example Construction

[0040] A preparation method of the toughened modified PBT resin, comprising the following steps:

[0041] (1) The required raw materials are weighed in proportions by weight;

[0042] (2) After drying PBT at 110-120°C for 4-6h, melt blending and extrusion granulation together with SEBS-g-MAH copolymer in a twin-screw extruder, the temperature of the feed section is 160- 200°C, the temperature of the plasticizing section is 200-220°C, the temperature of the homogenization section is 220-240°C, the screw speed is 300-600rpm, and the toughened PBT masterbatch is obtained;

[0043](3) After fully mixing the toughened PBT masterbatch with the remaining raw materials, inject, maintain pressure, form, and pre-plasticize in a screw injection molding machine (using standard screw), the melt temperature is 250-270°C, and the injection pressure is 100 -140MPa, barrel temperature is 240-280°C, mold temperature is 40-60°C, nozzle temperature is 230-270°C, and toughened modified PBT resin ...

Embodiment 1

[0049] A toughened and modified PBT resin, comprising the following raw materials in parts by weight: 70 parts of PBT, 28 parts of SEBS-g-MAH copolymer, 1 part of antioxidant 1010, and 1 part of polyethylene wax.

[0050] A preparation method of the toughened modified PBT resin, comprising the following steps:

[0051] (1) The required raw materials are weighed in proportions by weight;

[0052] (2) After drying PBT at 120°C for 5 hours, melt blending and extruding granulation together with SEBS-g-MAH copolymer in a twin-screw extruder, the temperature of the feeding section is 180°C, and the plasticizing section The temperature is 220°C, the temperature in the homogenization section is 220°C, and the screw speed is 600rpm to obtain toughened PBT masterbatch;

[0053] (3) Add the toughened PBT masterbatch and the remaining raw materials into the high-speed mixing barrel to stir, disperse, and mix evenly, and then perform injection, pressure holding, molding, and pre-molding i...

Embodiment 2

[0055] A toughened modified PBT resin, comprising the following raw materials in parts by weight: 70 parts of PBT, 28 parts of SEBS-g-MAH copolymer, 0.5 part of antioxidant 3052, 0.5 part of diethylacrylate ethyl phosphite, 1 part of polyethylene wax, 16 parts of glass-loaded silver antibacterial agent.

[0056] The preparation method of described diethyl acrylate ethyl phosphite is as follows:

[0057] After mixing diethylphosphorous oxychloride, triethylamine and anhydrous diethyl ether with a mass volume ratio of 1g:2g:15mL, place it in an ice bath, and add hydroxyethyl acrylate dropwise under stirring, and the diethyl The mass ratio of phosphorous oxychloride to hydroxyethyl acrylate is 1.2:1. After the dropwise addition, react at 60°C for 3.5 hours under stirring conditions, filter, and the filtrate is rotary evaporated under reduced pressure to obtain ethyl diethyl acrylate. Phosphate.

[0058] A preparation method of the toughened modified PBT resin, comprising the fo...

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Abstract

The invention relates to the field of modified PBT resin, and discloses toughened and modified PBT resin and a preparation method thereof. The toughened and modified PBT resin is prepared from the following raw materials in parts by weight: 50 to 80 parts of PBT and 5 to 30 parts of an SEBS-g-MAH copolymer. According to the invention, the SEBS-g-MAH copolymer is adopted as the flexibilizer, the interfacial bonding effect between the SEBS-g-MAH copolymer and PBT is strong, and the SEBS-g-MAH copolymer is uniformly dispersed, so that the mechanical properties of PBT can be better improved compared with SEBS.

Description

technical field [0001] The invention relates to the field of modified PBT resins, in particular to a toughened and modified PBT resin and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (referred to as PBT) is one of the toughest engineering thermoplastic materials, and it is also a variety of general engineering resins whose industrialization started late but has developed rapidly. It has excellent comprehensive performance and is widely used in various fields, such as: electronic devices, automobile industry, mechanical equipment and parts of precision instruments. [0003] The strength, chemical stability, electrical insulation, and thermal stability of PBT resin are very excellent, but pure PBT has shortcomings such as product warpage, poor toughness, and low notched impact strength, which limit its development in many fields. Therefore, It is necessary to develop a toughened modified PBT resin. [0004] The Chinese patent documen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/00C08K13/06C08K9/12C08K3/08C08K5/524C08K5/134
CPCC08L67/02C07F9/1411C08L2205/05C08L2205/03C08K2003/0806C08L51/006C08K5/1345C08K13/06C08K9/12C08K3/08C08K5/524
Inventor 陈世昌张发饶陈红征
Owner NINGBO NENGZHIGUANG NEW MATERIALS TECH
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