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Biodegradable polyester and preparation method thereof

A technology of biodegradable polyester and copolyester, applied in the field of polyester, can solve the problems that biodegradability and mechanical strength cannot be satisfied at the same time, large friction of mechanical equipment, slipping of plastic film, etc., and achieves good biodegradation effect. , reduce friction, good workability

Pending Publication Date: 2020-12-01
中瀚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current biodegradable polyester cannot achieve satisfactory results in terms of biodegradability and mechanical strength at the same time. In addition, on the one hand, the current biodegradable polyester has poor processability, and its friction with mechanical equipment is relatively large, which increases the The loss of equipment, on the other hand, when the biodegradable polyester is processed into plastic films, the phenomenon of sliding stacks between plastic films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] In one embodiment, the preparation method of the aliphatic-aromatic copolyester comprises: under the atmosphere of inert gas protection, putting the substance (d) and the substance (b) into the reaction kettle, under the condition of stirring , heat up to 200-220°C for 1-2 hours, then add substance (c) and tetrakis(2-ethylhexyl) titanate, heat up to 220-230°C for 1-2 hours, vacuumize, and keep the pressure below 100Pa , 240 ~ 270 ° C reaction 2 ~ 4h, discharge.

[0041] In a preferred embodiment, the preparation method of the aliphatic-aromatic copolyester comprises: under the atmosphere of inert gas protection, the material (d) and the material (b) are dropped into the reactor, and the Under the conditions, raise the temperature to 210°C for 1.5h, then add substance (c) and tetrakis(2-ethylhexyl) titanate, raise the temperature to 225°C for 1.5h, vacuumize, and react at 155°C under pressure below 100Pa 3h, discharge.

[0042] The inert gas mentioned in this applicati...

Embodiment 1

[0074] Embodiment 1 of the present invention provides a biodegradable polyester. The raw materials for its preparation are: 58 parts of aliphatic-aromatic copolyester, 20 parts of nanopowder, 5 parts of bio-based materials, 2 parts of Processing aids.

[0075] The raw materials for the preparation of the aliphatic-aromatic copolyester include substance (a) dibasic acid and substance (b) dibasic alcohol, and its molar ratio is 1:1.5; the said dibasic acid is substance (c) aromatic Dibasic carboxylic acid and substance (d) aliphatic dibasic carboxylic acid, the molar ratio of described substance (c) and substance (a) is 25:1; Described aromatic dibasic carboxylic acid is terephthalic acid; So The aliphatic dicarboxylic acid is fumaric acid and 1,4-butanedioic acid in a molar ratio of 1:2; the dihydric alcohol is 1,3-propanediol.

[0076] The preparation method of the aliphatic-aromatic copolyester is as follows: under the atmosphere of inert gas protection, put the substance (d...

Embodiment 2

[0082] Embodiment 2 of the present invention provides a biodegradable polyester, and its preparation raw materials are: 80 parts of aliphatic-aromatic copolyester, 32 parts of nanopowder, 50 parts of bio-based materials, 10 parts Processing aids.

[0083]The raw materials for the preparation of the aliphatic-aromatic copolyester include substance (a) dibasic acid and substance (b) dibasic alcohol, and its molar ratio is 1:1.5; the said dibasic acid is substance (c) aromatic Dibasic carboxylic acid and substance (d) aliphatic dibasic carboxylic acid, the molar ratio of described substance (c) and substance (a) is 40:1; Described aromatic dibasic carboxylic acid is terephthalic acid; So The aliphatic dicarboxylic acid is fumaric acid and 1,4-butanedioic acid in a molar ratio of 1:5; the dihydric alcohol is 1,3-propanediol.

[0084] The preparation method of the aliphatic-aromatic copolyester is as follows: under the atmosphere of inert gas protection, put the substance (d) and ...

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Abstract

The invention relates to the field of polyester, in particular to biodegradable polyester and a preparation method thereof. The biodegradable polyester is prepared from the following raw materials inparts by weight: 58-80 parts of aliphatic-aromatic copolyester, 0-32 parts of nanometer powder, 0-50 parts of a bio-based material and 0-10 parts of a processing aid. The biodegradable polyester provided by the invention has a good biodegradable effect, does not cause any negative influence on the environment, and is high in mechanical strength and low in friction coefficient; in the preparation process of the biodegradable polyester, friction between materials and equipment is reduced, a smooth process is ensured, and good processability is achieved; meanwhile, cost is low, so the competitiveness of the biodegradable polyester is achieved; and the preparation method is simple, convenient and feasible.

Description

technical field [0001] The invention relates to the field of polyester, more specifically, the invention relates to a biodegradable polyester and a preparation method thereof. Background technique [0002] Due to the excellent mechanical properties and thermal properties of polyester, it is widely used in various fields of people's daily life such as packaging, fibers, beverage bottles, films, and engineering plastics. However, due to the non-biodegradability of polyester products, the white pollution caused by discarded polyester products to the environment has also become a hot spot of concern. [0003] Biodegradable polyester is a kind of polymer material based on biological resources. Compared with petroleum-based polymers that use petrochemical resources as raw materials, biodegradable polyester can be produced in biological or biochemical processes or in biological environments. Degradation is one of the most active biodegradable plastics research and the best market ...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L3/08C08L91/00C08L3/02C08K7/10C08K3/36C08J5/18
CPCC08L67/06C08J5/18C08L2201/06C08L2205/03C08K2201/011C08L2203/16C08J2367/06C08J2403/08C08J2491/00C08J2403/02C08L3/08C08L91/00C08K7/10C08K3/36C08L3/02
Inventor 宁珅黄志远童军付静
Owner 中瀚新材料科技有限公司
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