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Engineering plastic composition and preparation method thereof

A technology for engineering plastics and compositions, applied in the field of engineering plastic compositions and their preparation, can solve the problems of intolerant hydrolysis and difficult application, and achieve the effects of improving hydrolysis resistance, toughening effect and excellent hydrolysis resistance.

Active Publication Date: 2020-04-14
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, polyester materials such as PBT are often not resistant to hydrolysis due to the presence of carboxyl groups, terminal hydroxyl groups and a large number of ester bonds, so it is difficult to apply in environments with high humidity

Method used

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  • Engineering plastic composition and preparation method thereof
  • Engineering plastic composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 80 parts of PBT, 20 parts of ethylene-vinyl acetate-glycidyl methacrylate terpolymer and 0.3 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] One part is pre-mixed evenly at room temperature, and then the premix is ​​fed into the conveying section of the twin-screw extruder from the main feeding port, and one part of chain extender ADR4370 is added to the middle of the intermeshing section of the twin-screw extruder through side feeding, after continuous An engineering plastic composition can be obtained by melt extrusion (extrusion temperature is 240° C., screw rotation speed is 150 rpm).

Embodiment 2

[0035] 80 parts of PET, 20 parts of ethylene-vinyl acetate-glycidyl methacrylate terpolymer, 0.2 parts of tris[2,4-di-tert-butylphenyl]phosphite and β-(3,5- 0.2 parts of n-octadecyl di-tert-butyl-4-hydroxyphenyl) propionate are premixed evenly at room temperature, and then the premix is ​​fed into the conveying section of the twin-screw extruder from the main feed port, and fed through the side Add 0.8 parts of chain extender ADR4468 to the middle part of the intermeshing section of the twin-screw extruder, and obtain an engineering plastic composition through continuous melt extrusion (extrusion temperature is 255° C., screw speed is 180 rpm).

Embodiment 3

[0037] 75 parts of PBT, 10 parts of ethylene-vinyl acetate-glycidyl methacrylate terpolymer, 15 parts of ethylene-vinyl acetate binary copolymer, tetrakis[β-(3,5-di-tert-butyl- 0.15 parts of 4-hydroxyphenyl) propionic acid] pentaerythritol ester, 0.15 parts of tris [2,4-di-tert-butylphenyl] phosphite and 0.1 part of solid paraffin were premixed at room temperature, and then the premix was prepared by The main feeding port is added to the conveying section of the twin-screw extruder, and 1.2 parts of chain extender hexamethylene diisocyanate is added to the middle of the intermeshing section of the twin-screw extruder through side feeding, and is continuously melted and extruded (extrusion temperature is 235 °C, the screw speed is 210rpm) to obtain an engineering plastics composition.

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Abstract

The invention discloses an engineering plastic composition and a preparation method thereof, and belongs to the technical field of polymer processing and modification. The engineering plastic composition comprises 65 to 90 parts of a polyester, 5 to 35 parts of an elastomer, 0.05 to 3 parts of a chain extender and 0.01 to 5 parts of a functional auxiliary agent. The engineering plastic compositiondisclosed by the invention not only has ultrahigh toughness, but also can keep higher tensile strength, is excellent in hydrolysis resistance, can be widely applied to the fields of plastic structural parts, plastic packages or automotive upholstery, and is promising in prospect.

Description

technical field [0001] The invention relates to an engineering plastic composition and a preparation method thereof, belonging to the technical field of polymer processing and modification. Background technique [0002] Polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) plastics are two commonly used polyester materials. Because of its high strength, fatigue resistance, dimensional stability, small creep, heat aging resistance, and good processing performance, it is widely used in automobiles, electronic appliances, industrial machinery and other fields. However, PBT and PET also have obvious disadvantages, for example, they are very sensitive to notches and have low notch impact strength, which are their main shortcomings as engineering plastics, and insufficient toughness has also become a major obstacle to popularization and application. Therefore, the research on the toughening modification of PBT and PET has always been an important content of the hi...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/08C08K5/134
CPCC08L67/02C08L23/0884C08K5/1345
Inventor 马丕明吴保钩操莹徐鹏武东为富
Owner JIANGNAN UNIV