Polyester resin, and molded article, strength film

A polyester resin, alicyclic technology, used in the field of polyester resin to achieve excellent heat resistance and transparency

Pending Publication Date: 2022-03-01
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the glass transition temperature of PET is about 80°C. Therefore, it can be said that it is not suitable for products used in automobiles, packaging materials for export and import, food packaging materials subjected to retort treatment or microwave heating, and products subjected to heat sterilization treatment. Applications requiring high heat resistance and transparency, such as baby bottles and tableware

Method used

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  • Polyester resin, and molded article, strength film
  • Polyester resin, and molded article, strength film
  • Polyester resin, and molded article, strength film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] In a 30-L polyester resin manufacturing device having a partial condenser, a total condenser, a cold trap, a stirrer with a torque detector, a heating device, and a nitrogen introduction pipe, charged diterephthalic acid Methyl ester (DMT) 7919g, ethylene glycol (EG) 1786g, spirodiol (SPG) 1900g, 1,4-cyclohexanedimethanol (CHDM) 5535g, tetrabutoxide titanium (TBT) 1.3879g, potassium acetate ( Acetic acid (K) 0.8005g, while raising the temperature to 225°C, transesterification was carried out by a conventional method.

[0105] Then, after the distillation amount of methanol generated in the transesterification reaction reached 90% of the theoretical amount, antimony trioxide (Sb 2 o 3 ) 2.3777g, triethyl phosphate (TEP) 3.7412g, then, keep the reaction solution at 225°C, depressurize to 13.3kPa in 1 hour, heat up in 1 hour, depressurize to 280°C, 130Pa, carry out polycondensation reaction. Then, the stirring speed was slowly decreased to 100 rpm, and when the stirring...

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Abstract

A polyester resin containing dicarboxylic acid structural units and diol structural units, more than 0 mol% and 20 mol% or less of the diol structural units being units derived from a diol having a cyclic acetal skeleton, and 70-98 mol% of the diol structural units being units derived from a diol having an alicyclic skeleton, the diol constitutional units include units derived from ethylene glycol, 80 mol% or more of the dicarboxylic acid constitutional units are units derived from terephthalic acid, and the polyester resin has the physical properties represented by (A) below. (A) The minimum value of the half-crystallization time measured by a depolarization intensity method when melting is performed at 280 DEG C and isothermal crystallization is performed at 150-230 DEG C is 600 seconds or less.

Description

technical field [0001] The present invention relates to a polyester resin, and a molded article, a stretched film, and a bottle containing the polyester resin. Background technique [0002] Aromatic saturated polyester resins, especially polyethylene terephthalate (hereinafter sometimes referred to as "PET") are balanced in terms of mechanical properties, solvent resistance, fragrance retention, weather resistance, and recyclability. The resin is widely used mainly for bottle and film applications. However, PET still has room for improvement in heat resistance. That is, the glass transition temperature of PET is about 80°C. Therefore, it can be said that it is not suitable for products used in automobiles, packaging materials for export and import, food packaging materials subjected to retort treatment or microwave heating, and products subjected to heat sterilization treatment. Applications requiring high heat resistance and transparency, such as baby bottles and tablewar...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08G63/672C08L67/02C08J5/18
CPCC08G63/672C08L67/02C08J5/18C08J2367/02C08L67/025C08L2203/10C08L2203/16
Inventor森下隆实安达恒贵永井雅之
OwnerMITSUBISHI GAS CHEM CO INC