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Thermoplastic polyester resin composition excellent in processing stability and molded articles thereof

A technology of thermoplastic polyester and resin composition, which is applied in the field of thermoplastic polyester resin composition, and can solve the problems such as insufficient improvement of epoxy compound exudation

Inactive Publication Date: 2005-07-13
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the stability of the above-mentioned various polyester compositions during melt molding processing, the generation of gas or odor, especially the improvement of the stabilizer and the oozing of epoxy compounds when the molded products are placed at high temperature are still lacking. insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9 and comparative example 1～5

[0097] The components shown in Tables 1 and 2 were rotationally mixed with a drum, and then melt-kneaded with a 30 mm single-screw extruder to obtain a granular composition (screw speed: 100 rpm). The composition was dried at a temperature of from 80° C. to 140° C. for 8 hours, and injection molded to produce a test piece.

[0098] For comparison, compositions to which the epoxy compounds without lactone chains shown in Table 3 had been added were formulated.

[0099] The blend composition and the evaluation results of the test pieces are shown in Tables 1 to 3 below.

[0100] From the results of Examples 1 to 9, it is clear that the polyester resin composition of the present invention can produce a polyester resin composition having low processing stability at high temperature, that is, little change in fluidity, excellent hydrolysis resistance, and low volatile components. . On the other hand, epoxy compounds using conventional polyester resin stabilizers have large fluidi...

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PUM

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Abstract

A thermoplastic polyester resin composition which is improved in processing stability and resistance to hydrolysis and bleed by the addition of an epoxy compound having a lactone chain and which is improved in stability in melt molding and processing and is suppressed in generation of gas or odor and bleeding of stabilizers or the epoxy compound from a molded article allowed to stand at high temperature by virtue of its low volatile content.

Description

technical field [0001] The present invention relates to a thermoplastic polyester resin composition in which a lactone chain-containing epoxy compound is blended into a thermoplastic polyester resin, and the composition has improved hydrolysis stability and melt viscosity stability. Background technique [0002] Linear polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) are widely used because they can be manufactured by molding methods such as injection molding. Because the polyester has many desirable properties such as chemical stability, solvent resistance, and low gas permeability, the polyester is an ideal material for blow molding, extrusion molding, and other molding methods. [0003] One of the problems with polyester resins in molding processing is the low melt viscosity of polyester. As a result, the shape of the molded product cannot be sufficiently maintained from after molding to before curing. Another problematic point is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00C08K3/00C08K5/00C08K5/098C08K5/1515C08L67/00C08L67/02C08L67/04
CPCC08L67/00C08K5/0066C08K5/098C08K5/1515C08L67/02C08L67/025C08L67/04
Inventor 大塚喜弘
Owner DAICEL CHEM IND LTD
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