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Modified polyester composition

A composition and polyester technology, applied in the field of modified polyester composition, can solve problems such as bending deformation and insufficient heat resistance, and achieve good heat resistance and high glass transition temperature

Inactive Publication Date: 2014-02-19
FAR EASTERN NEW CENTURY COPRRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is insufficient heat resistance, and it is prone to bending deformation in high temperature environments. Therefore, the structure of PET molecular chains is generally changed by adding a modifier, such as reducing the mobility of the molecular chains or changing the crystallization form, thereby improving glass. Properties such as transition temperature and melting point

Method used

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  • Modified polyester composition
  • Modified polyester composition
  • Modified polyester composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Preparation of modified polyester composition

[0065] The 1,2,2-trimethyl-1,3-bis(hydroxymethyl)cyclopentane prepared in the preparation example is uniformly mixed with ethylene glycol in a molar ratio of 3:97, and then 1,2,2- The molar ratio of trimethyl-1,3-bis(hydroxymethyl)cyclopentane to ethylene glycol to dimethyl terephthalate is 1.25:1. Add dimethyl terephthalate and mix uniformly to form A reaction mixture.

[0066] Add catalyst 1000ppm manganese acetate to the reaction mixture, make the reaction mixture undergo an esterification reaction at 160 to 250°C, when the conversion rate reaches 95%, an oligomeric oligomer is formed; 300ppm antimony trioxide is added to the oligomer The polycondensation reaction was carried out at 1 torr and 250 to 280° C. for 3 hours to obtain the modified polyester composition of Example 1.

Embodiment 2 and 3

[0068] In Examples 2 and 3, the modified polyester composition was prepared by the same steps as in Example 1. The difference lies in: changing 1,2,2-trimethyl-1,3-bis(hydroxymethyl) The molar ratios of cyclopentane to ethylene glycol are 10:90 and 25:75, respectively, as shown in Table 1.

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Abstract

A modified polyester composition is formed by polymerizing a reaction mixture, the reaction mixture includes a diol component, diacid or its alkyl ester, and a modifier having a structure represented by formula (I); and in the formula (I), R<1>, R<2> and R<3> identically or differently respectively represent hydrogen or a methyl group, and at least one of R<1>, R<2> and R<3> is the methyl group. The modified polyester composition has a high glass transition temperature by selecting the modifier in order to effectively improve the heat resistance.

Description

Technical field [0001] The invention relates to a modified polyester composition, in particular to a modified polyester composition with a higher glass transition temperature. Background technique [0002] Polyester is formed by condensation polymerization of diol (or polyol) component and dibasic acid (or polyacid) component, such as polyethylene terephthalate (abbreviated as PET), polyethylene terephthalate Butylene formate (abbreviated as PBT), polytrimethylene terephthalate (abbreviated as PTT), poly-1,4-cyclohexane dimethyl terephthalate (abbreviated as PCT), poly-2,6-naphthalene Ethylene Dicarboxylate (PEN for short) and so on. Because of its good thermal stability, environmental protection requirements, low cost, easy availability, and good elasticity, transparency and durability, PET is more widely used in the production of filling materials, molded products and various films. But its disadvantage is insufficient heat resistance and easy bending deformation under high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199
Inventor 吴汝瑜唐艺轩周幸仪
Owner FAR EASTERN NEW CENTURY COPRRATION