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Method for one-step preparation of super-tough polybutylene terephthalate

A polybutylene terephthalate, one-step technology, which is applied in the field of one-step preparation of super-tough polybutylene terephthalate, can solve problems such as cost increase, achieve processing and cost reduction, excellent strength , the effect of simple process

Inactive Publication Date: 2013-06-05
贵州省复合改性聚合物材料工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the existing processing method is divided into two steps and cause the cost to increase, to provide a method for preparing super-tough polybutylene terephthalate in one step, to reduce production costs, and to obtain Composite materials have excellent strength, toughness, flow properties, etc.

Method used

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  • Method for one-step preparation of super-tough polybutylene terephthalate

Examples

Experimental program
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Effect test

experiment example

[0015] Experimental example: PBT (brand L1082) 80kg, POE (brand 8842) 20kg, styrene monomer (industrial grade) 1kg, glycidyl methacrylate monomer (industrial grade) 1kg, hindered phenolic antioxidant (1076) 0.2kg, phosphite antioxidant (168) 0.2kg.

[0016] Raw material pretreatment: take PBT and dry in a vacuum drying oven at 120°C for 3 hours, cool to room temperature, and set aside; POE is dried in vacuum at 60°C for 4 hours.

[0017] One-step preparation: mix styrene monomer and glycidyl methacrylate monomer to obtain a mixed liquid for later use; take dried PBT, POE and antioxidant and mix them with high-speed stirring, and use a precision metering feeder at a rate of 1r / The feeding speed of min is sent into the co-rotating twin-screw extruder, and then the mixed solution is added from the precision metering feeder to the co-rotating twin-screw extruder at a feeding speed of 25r / min to extrude and granulate (the main engine screw speed is 360 r / min, and the temperature...

Embodiment 1

[0019] Example 1: PBT (brand L1082) 80kg, POE (brand 8842) 20kg, styrene monomer (industrial grade) 1kg, glycidyl methacrylate monomer (industrial grade) 1kg, crosslinking agent DCP (commercially available) 0.02 kg, hindered phenolic antioxidant (1076) 0.2 kg, phosphite antioxidant (168) 0.2 kg.

[0020] Raw material pretreatment: take PBT and dry in a vacuum drying oven at 90°C for 5 hours, cool to room temperature, and set aside; POE is dried in vacuum at 50°C for 5 hours.

[0021] One-step preparation: mix styrene monomer and glycidyl methacrylate monomer, add cross-linking agent, and dissolve to obtain a mixed solution for later use; take dried PBT, POE and antioxidant and mix them with high-speed stirring. The metering feeder is fed into the co-rotating twin-screw extruder at a feeding speed of 1r / min, and then the mixed liquid is fed into the co-rotating twin-screw extruder from the precision metering feeder at a feeding speed of 25r / min for extrusion and granulation (T...

Embodiment 2

[0023] Example 2: PBT (brand L1082) 80kg, POE (brand 8842) 20kg, styrene monomer (industrial grade) 1kg, glycidyl methacrylate monomer (industrial grade) 1kg, crosslinking agent DCP (commercially available) 0.04 kg, hindered phenolic antioxidant (1076) 0.2 kg, phosphite antioxidant (168) 0.2 kg.

[0024] The method of Example 1 was used to prepare the super-tough PBT composite material.

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Abstract

The invention discloses a method for one-step preparation of super-tough polybutylene terephthalate. Raw materials used by the method comprise polybutylene terephthalate, an elastomer, a styrene monomer, a glycidyl methacrylate monomer, a crosslinking agent and an antioxidant, and the method comprises the following steps of: taking the styrene monomer and the glycidyl methacrylate monomer, mixing, adding the crosslinking agent, dissolving and then getting a mixed solution for later use; taking the polybutylene terephthalate, the elastomer and the antioxidant, uniformly mixing, adding into an equidirectional twin-screw extruder, then adding the mixed solution and extruding to get the super-tough polybutylene terephthalate. The prepared PBT (polybutylene terephthalate) composite material has excellent strength, toughness, flowability and the like; and furthermore, the method disclosed by the invention adopts one-step preparation, so that the process is simple, the processing cost is greatly reduced and the method is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing super-tough polybutylene terephthalate in one step. Background technique [0002] Polybutylene terephthalate (PBT) is a thermoplastic semi-crystalline resin. Because of its excellent comprehensive properties, good molding processability and excellent cost performance, it has become the latest industrialization and the fastest development speed among general engineering plastics. A fast variety, widely used in electrical appliances, automobiles, mechanical equipment and other fields. However, the notched impact strength is very low, which is a typical notch-sensitive material, which greatly limits its application in the fields of automobiles and home appliances. [0003] In order to improve the notch sensitivity of PBT, people usually use the blending method of PBT and elastomer to improve the notched impact strength of PBT. Since the general pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L25/14C08L77/02C08K5/14B29C47/92B29C48/92
CPCB29C48/40
Inventor 郭建兵秦舒浩邵会菊张敏敏张凯舟杨二钘
Owner 贵州省复合改性聚合物材料工程技术研究中心