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Composition for preparing amorphous copolyester

A copolyester and amorphous technology, applied in the field of preparation of amorphous copolyester compositions, can solve the problems of affecting mechanical and processing properties, brittleness, etc., and achieve the effect of preventing the glass transition temperature from falling

Active Publication Date: 2011-05-18
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter is brittle due to the introduction of IPA, which affects its mechanical and processing properties

Method used

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  • Composition for preparing amorphous copolyester
  • Composition for preparing amorphous copolyester
  • Composition for preparing amorphous copolyester

Examples

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no. 1 example

[0021] The amorphous copolyester of the first embodiment is synthesized from a diacid monomer and two diol monomers, and its structural formula is shown in the following formula (1):

[0022]

[0023] Among them, the diacid monomer includes terephthalic acid (terephthalic acid, abbreviated as TPA), and the glycol monomer includes ethylene glycol (ethylene glycol, abbreviated as EG) and 1,3 / 1,4-cyclohexanedi Methanol (1,3 / 1,4-cyclohexanedimethanol, abbreviated as 1,3 / 1,4-CHDM), in which the addition amount of 1,3 / 1,4-cyclohexanedimethanol is 20-100 of the glycol equivalent Mol%. In addition, the above-mentioned diacid monomers and diol monomers generally need to be synthesized through two-stage esterification and polycondensation, and a polycondensation catalyst needs to be added during the reaction, and the content varies from about 25 to 500 ppm. The polycondensation catalyst used here is, for example, one or more metal catalysts selected from the group consisting of antimony, ...

no. 2 example

[0038] The amorphous copolyester of the second embodiment is synthesized from two diacid monomers and two diol monomers, and its structural formula is shown in the following formula (2):

[0039]

[0040] Among them, diacid monomers include terephthalic acid (TPA) and 5-tert-butyl isophthalic acid (5tBIA), glycol monomers include ethylene glycol (EG) and 1,3 / 1,4-cyclohexane Alkane dimethanol (1,3 / 1,4-CHDM), in which the addition amount of 5tBIA in terms of diacid equivalent and the addition amount of 1,3 / 1,4-cyclohexane dimethanol in terms of glycol equivalent are total If the diacid monomer and the diol monomer are synthesized by two-stage esterification and polycondensation, the polycondensation catalyst needs to be added during the reaction, and the content ranges from about 25 to 500 ppm. The polycondensation catalyst used here is, for example, one or more metal catalysts selected from the group consisting of antimony, titanium, germanium, tin, gallium, aluminum, and combinat...

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Abstract

The invention discloses a composition for preparing amorphous copolyester. The composition consists of a diacid monomer and a diol monomer. The diacid monomer comprises terephthalic acid (TPA), and the diol monomer comprises ethylene glycol (EG). Moreover, the diol monomer also comprises 1,3 / 1,4-cyclohexanedimethanol (1,3 / 1,4-CHDM), so that when the adding amount of the 1,3 / 1,4-CHDM is 20 to 100 mole percent of the equivalent weight of the diol, the amorphous copolyester can be obtained.

Description

[0001] This application is a divisional application with the filing date of December 29, 2006, the application number being 200610172541.8, and the title of "amorphous copolyester and its application". Technical field [0002] The present invention relates to a composition for preparing an amorphous copolyester (amorphous copolyester) and its application. More specifically, the present invention relates to a composition for preparing an amorphous copolyester with a relatively wide amorphous region. Composition and its application. Background technique [0003] Polyethylene terephthalate (PET) is a thermoplastic polyester engineering plastic that is esterified and polymerized by diacid and diol. This material is widely used in many industries because of its broad mechanical and electrical properties, strong gas barrier, good light transmission, hardness, easy processing, and low price. However, due to the regularity of its molecular structure, it is easy to accumulate to form a cr...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/82C08L67/02
Inventor 范正欣蔡育勋洪启源
Owner IND TECH RES INST
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