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Anti-ultraviolet copolyester and preparation method thereof

A copolyester, anti-ultraviolet technology, applied in the field of copolyester preparation, can solve the problem of the outward migration of additives

Inactive Publication Date: 2016-04-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an anti-ultraviolet copolyester and its preparation method, which solves the problems such as the outward migration of organic small molecule anti-ultraviolet additives in the process of material use.

Method used

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  • Anti-ultraviolet copolyester and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] In this example, polybutylene succinate containing 1% 2-hydroxy-4-(2,3-epoxypropoxy)benzophenone was prepared by bulk melt polycondensation method.

[0029]Add 1.0 moles of succinic acid, 1.2 moles of 1,4-butanediol, 0.012 moles of 2-hydroxy-4-(2,3-epoxypropoxy)benzophenone, and 0.0005% catalyst tetrabutyl titanate In the three-necked flask, under the protection of nitrogen atmosphere, put it in an oil bath and heat it up, react at 120°C for 0.5 hours, at 160°C for 1 hour, and at 220°C for 3 hours, until no liquid flows out, and the mixture in the reaction system becomes clear; Lower the temperature, add 1% catalyst tetrabutyl titanate and 0.01% stabilizer trimethyl phosphate under the protection of nitrogen atmosphere, stir quickly to make the catalyst uniformly dispersed; then vacuumize to 50Pa, react at 240°C for 5 hours to polymer Climb the pole; discharge to obtain the product. The number average molecular weight is 42766 g / mol. It is made into a thin film with a...

Embodiment 2

[0031] In this example, polytrimethylene isophthalate containing 0.1% 2,2'-dihydroxy-4-(2,3-epoxypropoxy)benzophenone was prepared by bulk melt polycondensation method.

[0032] 1.0 moles of isophthalic acid, 1.2 moles of 1,3-propanediol, 0.0012 moles of 2,2'-dihydroxy-4-(2,3-epoxypropoxy)benzophenone, 1% catalyst hafnium acetylacetonate Put it into a three-necked flask, under the protection of nitrogen atmosphere, put it in an oil bath and heat it up, react at 120°C for 0.5 hours, at 160°C for 1.5 hours, and at 220°C for 2 hours until no liquid flows out, and the mixture in the reaction system becomes clear; Cool down, add 1% catalyst hafnium acetylacetonate and 0.001% stabilizer bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite under the protection of nitrogen atmosphere, stir quickly to make the catalyst evenly dispersed; then vacuum to 50Pa, react at 250°C for 2 hours until the polymer climbs the pole; the product is obtained by discharging. The number average mole...

Embodiment 3

[0034] In this example, polybutylene adipate containing 1% 2-(5-(2,3-epoxypropoxy)-2-hydroxyphenyl)benzotriazole was prepared by bulk melt polycondensation method.

[0035] 1.0 moles of adipic acid, 1.1 moles of 1,4-butanediol, 0.012 moles of 2-(5-(2,3-epoxypropoxy)-2-hydroxyphenyl)benzotriazole, 2% catalyst Ethyl orthosilicate was added to a three-necked flask, and under the protection of nitrogen atmosphere, it was placed in an oil bath and heated to program temperature rise, reacted at 120°C for 1 hour, at 170°C for 2 hours, and at 230°C for 5 hours until no liquid flowed out, and the reaction system The mixture becomes clear in the middle; cool down, add 0.001% catalyst ethyl orthosilicate and 0.01% stabilizer triphenyl phosphite under the protection of nitrogen atmosphere, stir quickly to make the catalyst evenly dispersed; then vacuumize to 50Pa, at 220℃ React for 4.5 hours until the polymer climbs the pole; discharge to obtain the product. The number average molecular ...

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Abstract

The invention provides an anti-ultraviolet copolyester and a preparation method thereof, and belongs to the field of copolyester preparation. A reaction of an ultraviolet absorption group-containing monomer reacts with a diacid and a diol to prepare the copolyester, and the molecular weight of the copolyester is 1*10<3>-1*10<6>. The preparation method comprises two steps of esterification and vacuum polycondensation. The anti-ultraviolet copolyester is obtained through fusion polycondensation of the ultraviolet absorption group-containing polymerizable monomer, the diacid and the diol. The anti-ultraviolet copolyester prepared in the invention has no compatibility problem of addition type ultraviolet screeners or polymer matrixes, and solves the problem of outward migration of additives existing in the use process of organic micro-molecular anti-ultraviolet additives. The anti-ultraviolet copolyester prepared in the invention has good mechanical performances and excellent ultraviolet ageing resistance.

Description

technical field [0001] The invention belongs to the field of copolyester preparation, in particular to a copolyester with ultraviolet absorbing functional groups in its molecular chain and a preparation method thereof. Background technique [0002] Polyester has been widely used in fiber, film and other fields due to its good mechanical properties and molding processability. Many polyester products (such as packaging materials, agricultural mulch, etc.) are used outdoors, so the anti-ultraviolet aging performance of polyester materials is one of its important performance indicators, which directly affects the long-term performance of materials. [0003] At present, there are many reports on the improvement of UV stability of polyester materials in patents and other documents, but the improvement methods mainly focus on the post-processing of polymers, that is, light stabilizers, UV shielding agents, etc. are used as additives in the process of processing. Added to the polym...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/183C08G63/685
CPCC08G63/20C08G63/183C08G63/6856
Inventor 郭宝华张旸齐治国徐军
Owner TSINGHUA UNIV
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