Polyester-based resin composition

A polyester resin and base resin technology, applied in the field of molded products and packaging containers, can solve the problem of darkening of molded products

Inactive Publication Date: 2004-06-09
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document relates to the improvement of the production method of heat-resistant bottles, and does not refer at all to the prevention of darkening of molded articles by the action of phosphorus atoms in polyamide resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Weigh polyamide MXD6 (hereinafter referred to as "PA1", water content: 0.03 % mass; relative viscosity: 2.79; phosphorus concentration: 325 ppm); and poly(ethylene terephthalate) dry pellets (hereinafter referred to as "PET1: obtained from MPI Polyester Industry Co., Ltd. ; antimony concentration: 230ppm).Based on the total PA1 and PET1, calcium hydroxide (obtained from Wako Pure Chemical Industries, Ltd.; guaranteed grade; 96% purity) was added thereto in an amount of 1000ppm, and mixed in a roller mix.

[0072] Under the reduced pressure of evacuating from the exhaust port by a vacuum pump, under the conditions of a barrel temperature of 270-280° C., a screw speed of 100 rpm and an extrusion speed of 15 kg / h, from a twin-screw extruder (obtained from Toshiba Machine Co., Ltd. . Ltd.'s TEM37BS), and then pelletized by a pelletizer (from IsuzuKakoki Co., Ltd.'s SCF-150). Table 1 shows the brightness of the pellets.

[0073] The pellets were vacuum-dried at 150° C. fo...

Embodiment 2

[0078] The method of Example 1 was repeated except that the amount of calcium hydroxide added was changed to 311 ppm based on the total polyamide resin and polyester resin used to produce pellets and films. Table 2 shows the brightness of the pellets and the oxygen permeability constant of the alignment film.

Embodiment 3

[0080] The method of Example 1 was repeated except that the amount of calcium hydroxide added was changed to 466 ppm based on the total polyamide resin and polyester resin used to produce pellets and films. Table 2 shows the brightness of the pellets and the oxygen permeability constant of the alignment film.

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Abstract

The polyester-based resin composition of the present invention comprises a polyamide resin, a polyester resin containing an antimony compound and a compound selected from the group consisting of inorganic acid salts and hydroxides of group-1 or -2 metals of the periodic table and transition metals. In the polyester-based resin composition, the phosphorus atom concentration, the antimony atom concentration, and the blending ratio of the inorganic acid salt or hydroxide to the phosphorus compound are regulated so as to satisfy the specific relationships to effectively prevent the darkening due to the deposition of antimony metal, thereby providing the polyester-based resin composition having excellent gas barrier properties and a good appearance with minimized darkening.

Description

technical field [0001] The present invention relates to a resin composition containing polyamide resin and polyester resin, and molded articles and packaging containers made from the resin composition. More specifically, the present invention relates to a resin composition obtained by melt-blending a specific polyamide resin containing a phosphorus compound, a polyester resin containing an antimony compound, and at least one compound selected from Groups 1 and 2 of the Periodic Table. Produced from compounds in inorganic acid salts and hydroxides of group metals and transition metals, the resin composition improves gas barrier properties and eliminates the problem of dull appearance in conventional resin compositions, while in polyester resin only Gas barrier properties are insufficient in conventional resin compositions. The present invention also relates to shaped articles and packaging containers produced from such resin compositions. Background technique [0002] Polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L77/00
CPCC08L77/00C08L67/02C08L2666/20
Inventor 森晃山本幸司
Owner MITSUBISHI GAS CHEM CO INC
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