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Biodegradable linear random copolyester and its preparation method and uses

A technology of copolyester and aromatic copolyester, applied in the direction of polyester coating, single-component polyester rayon, coating, etc., can solve the problems of many side reactions, serious side reactions, poor stability of polyester products, etc.

Active Publication Date: 2008-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of the former is serious side reactions, poor stability and yellow color of the obtained polyester products; the latter has certain toxicity, which limits the application field of polyester products
[0014] In summary, existing polyester catalysts have disadvantages such as slow polymerization rate, many side reactions, toxicity, and yellowish product color.
In the biodegradable copolyester synthesis technology, in addition to the above shortcomings, there are also shortcomings such as complex operation process and wide molecular weight distribution of polymerization products.

Method used

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  • Biodegradable linear random copolyester and its preparation method and uses
  • Biodegradable linear random copolyester and its preparation method and uses
  • Biodegradable linear random copolyester and its preparation method and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1-6

[0098] Example A1-6 Preparation of rare earth catalyst Cat2

Embodiment A1

[0099] Example A1 Preparation of anhydrous lanthanum chloride (LaCl3) (document J Inorg Nucl Chem 1962, 34, 387)

[0100] Dissolve 10g of La2O3 in excess hydrochloric acid, heat (temperature ≥100℃) to concentrate the solution, add a metered amount of NH4C1 (molar ratio to La2O3 is 3 / 1), carefully heat (temperature ≥100℃) to steam off the excess acid to obtain LaCl3·nH2O+NH4C1 solid, grind the solid and add it to the quartz sublimation tube, vacuumize to <5mmHg; slowly heat up to 400℃ in the tube furnace, vacuum for 1hr; cool to room temperature under vacuum, and sublimate Fill the tube with argon gas, remove the sublimation tube, and move it into another sealed tube for use under the protection of argon gas.

Embodiment A2

[0101] Example A2 Preparation of lanthanum acetylacetonate La(acac)3 (Document Polymer 2001, 42, 7511-7516)

[0102] In a 250ml three-necked flask, dissolve LaCl3·7H2O (3.47g, 9.37mmol) in 50ml of water to form a solution s1. Add s1 dropwise to acetylacetone (5.63g, 56.2mmol) in 50ml aqueous solution s2 at room temperature Under stirring, adjust the pH to 7 by adding 2NKOH solution. The reaction mixture contained La(acac)3 precipitate, stirred, filtered, and dried under vacuum at 60°C to obtain about 4g of La(acac)3.

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Abstract

The invention discloses a biodegradable linear random copolyester, its preparation method and uses, wherein the copolyester has a structural unit of (1), wherein m is an integer of 2-10, n is an integer of 0-8, p is an integer of 2-10, m, n, p are identical or different, x is an integer of 1-10, y is an integer of 1-10, the average molecular weight Mw of the copolyester is 100,000-600,000g / mol, its molecular weight distribution is 1.2-3, which is measured through GPC method. The copolyester can be widely applied into section bar, film, fabric and coating.

Description

Technical field [0001] The invention relates to a biodegradable linear random fat / aromatic copolyester. More specifically, it relates to a biodegradable fat / aromatic copolyester with high molecular weight and narrow molecular weight distribution, and a preparation method and application thereof. Background technique [0002] At present, aromatic polyesters such as polyethylene terephthalate PET, polybutylene terephthalate PBT, polytrimethylene terephthalate PPT, etc., as engineering materials have been widely used in people’s daily life In various fields, they can be made into materials such as fibers, beverage bottles, and films. However, these polymers are basically indegradable in nature and can resist the erosion of bacteria. So far there is no obvious bacteria or enzymes that can erode pure aromatic polyesters (PET, PBT). These polyesters degrade water Very insensitive, PET can last for 16 to 48 years, and PET fiber can last for 30 years in humans and animals. Therefore, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/181C08G63/82C08J5/18C09D167/00D01F6/62
Inventor 陈伟祝桂香陈锡荣张伟闫一凡张艳霞吕静兰
Owner CHINA PETROLEUM & CHEM CORP
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