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Polyester resin composition

A technology of polyester resin and composition, applied in the field of polyester resin composition, can solve the problems of whitening, high crystallinity, impaired transparency, etc., and achieve the effect of excellent impact resistance at room temperature and excellent impact resistance

Active Publication Date: 2012-05-23
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its rigid molecular structure, PEN has more advantages than PET in terms of heat resistance (glass transition temperature is about 110°C), gas barrier properties, etc., but the price is very high, and it is crystallized like PET. Therefore, if it is necessary to manufacture thick molded products and sheets, there are disadvantages of whitening due to crystallization and loss of transparency.

Method used

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  • Polyester resin composition
  • Polyester resin composition
  • Polyester resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited by these Examples.

[0066] Raw materials used in the examples and comparative examples are shown below.

[0067] (1) MBS-like core-shell rubber: B-521 (trade name, manufactured by Kaneka Co., Ltd.), refractive index 1.54

[0068] (2) MBS-like core-shell rubber: M-300 (trade name, manufactured by Kaneka Co., Ltd.), refractive index 1.56

[0069] (3) MA-based core-shell rubber: M-400 (trade name, manufactured by Kaneka Co., Ltd.), refractive index 1.49

[0070] (4) Styrene-butadiene copolymer: Nipol NS310S (trade name, produced by Japan Zeon Co., Ltd.), block-shaped rubber-like polymer (crushed to a diameter of about 1-5 mm for use), refractive index 1.53

[0071] (5) Butadiene rubber: Nipol BR1220 (trade name, produced by Japan Zeon Co., Ltd.), block-shaped rubber-like polymer (crushed to about 1-5mm in diameter for use), refractive index 1.52

...

manufacture example 1 and 2

[0085] [Manufacture of polyester resin (A-1) and (A-2)]

[0086] Add terephthalic acid in the amount listed in Table 1 to a 150-liter polyester resin production facility equipped with a packed column rectification column, partial condenser, complete condenser, cold trap, stirrer, heating device, and nitrogen introduction pipe And ethylene glycol, carry out esterification reaction by usual method. Ethylene glycol for depolymerization and germanium dioxide in the amounts listed in Table 1 were added to the obtained ester, and depolymerization was performed at 225° C. under a nitrogen stream. After the produced water was distilled off and the reaction was performed for 3 hours, ethylene glycol was distilled off at 215° C. and 13.3 kPa. Tetra-n-butyl titanate, potassium acetate, triethyl phosphate, 3,9-bis(1,1-dimethyl-2-hydroxyethyl)- 2,4,8,10-tetraoxaspiro[5,5]undecane was reacted at 225°C and 13.3kPa for 3 hours. Raise the temperature and reduce the pressure of the obtained ...

Embodiment 1～6

[0109] [Manufacture of polyester resin composition]

[0110] The types and amounts of core-shell rubber listed in Table 2 and Table 3 were dry-mixed with polyester resin (A-1) or (A-2), and then melt-kneaded with an extruder to produce Table 1. 2 and the polyester resin composition described in Table 3.

[0111] [Manufacturing method of single-layer sheet]

[0112] Using a 65 mm twin-screw extruder with vents, the polyester resin composition was extruded while volatilizing and detaching from the vents, and a single-layer sheet (thickness: 0.35 mm) was produced by T-die extrusion. Table 2 shows the evaluation results of the single-layer sheet.

[0113] [Manufacturing method of multilayer sheet]

[0114] Using a 65mm twin-screw extruder with a vent, extrude the raw material for the core layer while volatilizing and detaching the core layer. On the other hand, mix the rubber-like polymer with the surface layer raw material and extrude it with a 30mm twin-screw extruder with a ...

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Abstract

The present invention provides a polyester resin composition comprising (A) 70 to 99.5% by mass of a polyester resin which comprises dicarboxylic acid units and diol units and in which 1 to 60 mol% of the diol units are diol units that each contain a cyclic acetal skeleton and 0.5 to 30% by mass of a core-shell type rubber which has a mean particle diameter of 1[mu]m or less and which exhibits an absolute difference in refractive index of 0.02 or less with respect to the refractive index of the polyester resin (A).

Description

technical field [0001] The present invention relates to a polyester resin composition comprising a diol unit having a cyclic acetal skeleton. Morphologically utilized polyester resin composition. Background technique [0002] Polyester resins, especially polyethylene terephthalate (hereinafter sometimes referred to as "PET"), are resins with balanced mechanical properties, solvent resistance, fragrance retention, and reusability. It is widely used mainly for materials, films and other purposes. However, since PET has high crystallinity, if a thick molded article or sheet is to be produced, whitening occurs due to crystallization, which impairs transparency. In addition, since the glass transition temperature of PET is about 80°C, it cannot be used for products used inside automobiles, packaging materials for import and export, packaging materials that undergo retort treatment or electronic furnace heating, etc., requiring high heat resistance, In the use of transparency. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02B32B27/18B32B27/36C08F279/06C08G63/66C08L21/00
CPCC08L51/003C08L51/04C08L51/06B32B2457/00C08L67/02C08L67/025B32B27/18B32B27/36B32B2439/00Y10T428/31507Y10T428/31786Y10T428/31797C08L2666/24B32B27/06C08F279/06C08G63/66C08J5/18C08L55/02C08L2207/53
Inventor 川畑正
Owner MITSUBISHI GAS CHEM CO INC
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