Long chain branched polyester and preparation method thereof

A long-chain branched and polyester technology, applied in the field of polyester and its preparation, can solve the problems of difficult mixing, uneven chain extension and branching reactions, and high toxicity of chain extenders.

Active Publication Date: 2011-12-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the second method, the chain extender is either highly toxic or costly; the polyester resin and the chain extender have a large viscosity difference, and it is difficult to mix evenly, resulting in uneven chain extension and branching reactions, which affect product performance; and the chain extension method is adopted Increased the complexity of the preparation process, equipment investment

Method used

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  • Long chain branched polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Put 66.45 g of phenyl acid, 61.28 g 1,4-butanol, put it in 250 ml of four-port burnt bottle, connect the condensate device and mechanical stirring device, add catalyst titanate 0.136 g, oil bath heating at 220 at 220 o C. The nitrogen access rate is 0.5 L / min Esterized dehydration 3 h to obtain the oral ectopic hydroxyl esters.

[0054] At the same time, 58.45 G Jibaic acid, 54.03 G 1,4-butanol, 0.67 g tethydrogen-hydrogen-tethexyl acid dietary glycerol and catalyst titanate 0.12 G on 180 o C, the nitrogen access rate is 0.5 L / min Esterized dehydrated 3 h, which is the product of the fatty ends.

[0055] Then transfer the product in the two bottle to a 500 mL four -port burnt bottle, connect the condensate device and mechanical mixing device, add 0.5 g of acetone catalycerone in rare earth, and gradually increase the oil temperature to 260 o C, the pressure gradually dropped to 300 PA, reacting 10 h.Get a co -polyester with a heavy molecular weight of 165,000, the product i...

Embodiment 2

[0057] Put 68.87 g 1,4-ring niche, 70.90 g 1,6-hexol, put it into 250 mL four-port bottle, connect the condensate device and mechanical stirring device, the oil bath is heated at 195 o C. The nitrogen access rate is 0.5 L / min Esterized dehydration 3 h, which is the product of the hydroxyl ester.

[0058] At the same time, 47.24 G dis acid, 70.90 g 1,6-hexol, 3.35g shrinking glycerin and catalyst titanate 0.12 g to 180 o C, the nitrogen access rate is 0.5 L / min Esterized dehydrated 3 h, which is the product of the fatty ends.

[0059] If the operation steps of the cluster stage are implemented as a common polyester with a heavy average molecular weight of 145,000, the product is white and slightly yellow.

Embodiment 3

[0061] Put 62.4 g 2,5-beanic acid, 61.28 g 1,4-butanol, put it into 250 ml of four-port bottle, connect the condensate device and mechanical mixing device, add 0.136 g of catalyst titanate, oil bath, oil bathHeating at 180 o C. The nitrogen access rate is 0.5 L / min Esterized dehydration 3 h, which is the product of the hydroxyl ectopic ester.

[0062] At the same time, 58.45 G Jiba acid, 54.03 g butanol, 0.67 g lycopyl acid dietary glycerin and catalyst titanate 0.12 G on 180 o C, the nitrogen access rate is 0.5 L / min Esterized dehydrated 3 h, which is the product of the fatty ends.

[0063] If the operation steps of the cluster stage are implemented as a common polyester with a weight of 130,000 molecular weights, the product is white and slightly yellowed.

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Abstract

The invention discloses long-chain branched polyester and a preparation method thereof. The long-chain branched polyester is obtained by carrying out esterification and polycondensation on a diacid component A, a diacid component B and a bifunctional branching agent component C such as biglycidyl ester, diglycidyl ether or glycidol and the like. According to the invention, a non-toxic bifunctional branching agent is directly adopted to in situ generate branching points; the preparation method is unique, preparation process is simple and environmentally-friendly, branching reaction is uniform,branching degree is easy to regulate and control, and the high molecular weight long-chain branched polyester can be prepared; and the preparation method can be used for preparation of non-degradablepolyester and preparation of biodegradable polyester, thereby being beneficial to the realization of commercialization. The long-chain branched polyester has the characteristics of long-chain branching and large molecular weight in structure and is beneficial to increase of melt strength and improvements of blow molding and foaming processing performance.

Description

Technical field [0001] The invention involves polyester and its preparation methods, especially a long chain supporting polyester and its preparation methods. Background technique [0002] Polyester is an important polymer that is widely used in engineering plastics, fiber, packaging materials, thin film and other fields.Among them, the aromatic polyester is mainly used as engineering plastics, fiber, beverage bottles, etc., while the fats and aroma -fragrant fattees are important biodegradable polymers because of biodegradability.Materials, film, fiber and other fields have important application prospects, especially in terms of biodegradable agricultural film, with attractive application prospects. [0003] Compared with linear polyester, long -chain bracket polyester has a higher melt strength, which is more conducive to processing processes such as thin film blowing and foaming.The preparation of long -chain polyester is generally used as follows.First, add a certain amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G63/183C08G63/78C08G63/46C08G63/199C08G63/42C08G63/16C08G63/91
Inventor 吴林波吕冉冉
Owner ZHEJIANG UNIV
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