Preparation method of lightly-crosslinked aliphatic-aromatic copolyester

A lightly cross-linked, aliphatic technology, applied in the field of materials, can solve the problems of complex preparation process of copolyester and insufficient performance of copolyester, achieve the effect of increasing elongation at break and breaking energy, and expanding the application range

Active Publication Date: 2012-02-01
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved in the present invention is to prepare lightly crosslinked (crosslinking degree<5) %) of the aliphatic-aromatic copolyester, to overcome the defects of the prior art copolyester preparation process complexity and copolyester performance deficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] [Example 1] The preparation method of the slightly crosslinked aliphatic-aromatic copolyester obtained in this example is carried out in the following steps:

[0052] (1) 52g dimethyl terephthalate (DMT), 39g adipic acid, 105g 1,4-butanediol, 0.36g trimethylolpropane, 0.01g toluene-4-sulfonic acid, 0.09g Tetra-n-butyl titanate was added into a 250mL three-necked flask equipped with a mechanical stirring device. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the reaction is carried out under nitrogen conditions. The esterification and transesterification reactions were stirred at 220° C. for 2 h, and the esterification and transesterification reactions were completed.

[0053] (2) Add 0.05g catalyst tetra-n-butyl titanate and 0.1g heat stabilizer triphenyl phosphite to the reaction mixture in step (1), and make the polymerization ...

Embodiment 2

[0056] [Example 2] The preparation method of the slightly crosslinked aliphatic-aromatic copolyester obtained in this example is carried out in the following steps:

[0057] (1) 52g dimethyl terephthalate (DMT), 39g adipic acid, 105g 1,4-butanediol, 0.61g trimethylolpropane, 0.01g toluene-4-sulfonic acid, 0.09g Tetra-n-butyl titanate was added into a 250mL three-necked flask equipped with a mechanical stirring device. After all the materials were added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel. The esterification and transesterification reactions were stirred at 170° C. for 7 hours, and the esterification and transesterification reactions were completed.

[0058] (2) Add 0.05g of catalyst tetra-n-butyl titanate and 0.1g of thermal stabilizer triphenyl phosphite to the reaction mixture in step (1), and make the polymerization reaction vacuumize at a temperature of 280°C (less than 500Pa...

Embodiment 3

[0061][Example 3] The preparation method of the slightly crosslinked aliphatic-aromatic copolyester obtained in this example is carried out in the following steps:

[0062] (1) 35g of dimethyl terephthalate (DMT), 72g of sebacic acid, 85g of 1,3-propanediol, 2.2g of pentaerythritol, 0.05g of zinc acetate dihydrate, and 0.07g of tetra-n-butyl titanate were added to In a 250mL three-necked bottle equipped with a mechanical stirring device. After all the materials were added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel. The esterification and transesterification reactions were stirred at 200° C. for 4 h, and the esterification and transesterification reactions were completed. .

[0063] (2) 0.06g catalyst dibutyltin oxide and 0.08g heat stabilizer trimethyl phosphite are added in the reaction mixture of step (1), and the polymerization reaction is vacuumized (less than 500Pa) at a temperatu...

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Abstract

The invention provides a preparation method of lightly-crosslinked aliphatic-aromatic copolyester. The copolyester can be synthesized and prepared from the following components: a) aromatic dibasic acid, ester, anhydride or a mixture thereof; b) aliphatic dibasic acid, ester, anhydride or a mixture thereof; c) aliphatic dibasic alcohol or alicyclic dibasic alcohol; and d) a compound with three or more esterification functional groups. The preparation method comprises the following steps: adding the four components a, b, c and d into a reaction device according to a certain ratio; vacuumizing; filling nitrogen gas; reacting at 170-230 DEG C; vacuumizing to carry out polycondensation reaction after the completion of esterification and/or interesterification; taking out the product after the completion of reaction; and cooling and molding in water to obtain the copolyester. The invention overcomes the defect of high complexity in the copolyester preparation process in the prior art. Besides, by adding the component d, the invention further improves the performance of the copolyester and widens the application range of the copolyester.

Description

field of invention [0001] The invention belongs to the field of materials, and relates to a polyester material, especially a preparation method of degradable polyester. Background technique [0002] Since J.R.Whenfield and J.T.Dikson first synthesized polyethylene terephthalate (PET) in 1941, polyesters, especially aromatic polyesters, have entered the fields of textiles, machinery, and electronics. Subsequently, the same series of polyesters, poly(1,4-butylene terephthalate) (PBT) and poly(1,3-trimethylene terephthalate) (PTT) were developed one after another, and large-scale production was realized. Industrial production. So far, this kind of thermoplastic aromatic polyester is active in various fields of people's life, such as light industry, food packaging, etc., because of its stable thermal properties, excellent mechanical properties, processability and low price. [0003] The progress of society, the development of science and technology, and the improvement of huma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/20C08G63/78C08G63/60C08K5/526C08K5/523C08K5/524C08K5/521
Inventor 赵冬云杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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