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High-melting-point polyester hot melt adhesive with better fluidity

A polyester hot-melt adhesive and fluidity technology, used in adhesives and other directions, can solve the problems of difficulty in obtaining the diol structure of the flow modification component, increase the cost of the process, increase the cost of raw materials, etc., achieve high heat resistance stability, reduce Viscosity, the effect of reducing the viscosity of the system

Active Publication Date: 2012-06-13
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are some deficiencies in the preparation methods for improving the fluidity of hot-melt adhesives mentioned in the above-mentioned patents. For example, the flow-modifying component glycol added in CN101935392A is relatively difficult to obtain in structure, and additionally increases the cost of raw materials; patent CN1432603 Compared with the melt index provided by this patent, the melt index in the patent has no advantage; and the hyperbranched polyester used in the patent CN1760304 requires additional synthesis, which increases the process cost from the technical point of view

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 249g of terephthalic acid, 66.4g of isophthalic acid, 20.2g of sebacic acid, 68.4g of 1,4-butanediol, 188.48g of ethylene glycol, and 0.5g of n-butyl titanate into a 2L reactor Inside. The reactor has stirring, temperature measuring system, rectification column and reflux condenser. After gradually raising the temperature to 100°C, the stirring is started. When the temperature is close to 160°C, water begins to distill out. At about 210°C, wait for the water output to reach more than 90% of the theoretical value, and the reaction in the esterification stage will end.

[0025] Add 0.25 g of triphenyl phosphate and 0.17 g of sodium perfluorooctanoate to carry out compression polymerization under reduced pressure. Gradually raise the temperature to 250°C and keep it warm; the pressure in the kettle is gradually reduced to 110pa and maintained for about 1.5 hours to complete the polycondensation reaction. Nitrogen gas is passed and the material is discharged into cold...

Embodiment 2

[0028] Put 249g of terephthalic acid, 33.2g of isophthalic acid, 60.6g of sebacic acid, 85.5g of 1,4-butanediol, 176.7g of ethylene glycol, and 0.51g of n-butyl titanate into a 2L reactor Inside. The reactor has stirring, temperature measuring system, rectification column and reflux condenser. After gradually raising the temperature to 100°C, the stirring is started. When the temperature is close to 170°C, water begins to distill out. At about 210°C, wait for the water output to reach above 93% of the theoretical value, and the reaction in the esterification stage will end.

[0029] 0.17 g of stabilizer triphenyl phosphate and 0.5 g of sodium perfluorododecyl carboxylate were added to carry out compression polymerization under reduced pressure. Gradually raise the temperature to 260°C for heat preservation; gradually reduce the pressure inside the kettle to 110pa, and keep it for about 1.5 hours to complete the polycondensation reaction. Nitrogen gas is passed and the materi...

Embodiment 3

[0032] Add 265.6g of terephthalic acid, 33.2g of isophthalic acid, 40.4g of sebacic acid, 102.6g of 1,4-butanediol, 164.92g of ethylene glycol, and 0.5g of n-butyl titanate into a 2L reaction Inside the cauldron. The reactor has stirring, temperature measuring system, rectification column and reflux condenser. After gradually raising the temperature to 100°C, the stirring is started. When the temperature is close to 170°C, water begins to distill out. At about 210°C, when the water output reaches 91% of the theoretical value, the reaction in the esterification stage ends.

[0033] Add 0.50 g of stabilizer triphenyl phosphate and 0.42 g of lithium perfluoroheptanoate to carry out compression polymerization under reduced pressure. Gradually raise the temperature to 255°C for heat preservation; gradually reduce the pressure inside the kettle to 110pa, and keep it for about 1.5 hours to complete the polycondensation reaction. Nitrogen gas is passed and the material is discharged...

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Abstract

The invention discloses a synthesis method of a high-melting-point polyester hot melt adhesive with better fluidity. The synthesis method comprises the following steps of: (1) carrying out esterification reaction on p-phthalic acid, m-phthalic acid, fatty dicarboxylic acid, ethylene glycol and C3-C6 diol under the action of titanate serving as a catalyst; and (2) adding a stabilizer and a surfactant to the products obtained in the step (1), and carrying out reduced-pressure condensation polymerization reaction to obtain a product, namely the high-melting-point polyester hot melt adhesive with better fluidity. The obtained polyester hot melt adhesive has good adhesion performance, better fluidity when used at high temperature, and excellent wet leveling property.

Description

technical field [0001] The invention relates to a preparation method of a high-melting-point polyester hot-melt adhesive with good fluidity. Background technique [0002] At present, most polyester hot melt adhesives use aromatic dibasic acids or dimethyl dibasic acids. Due to the existence of aromatic benzene rings, the viscosity of the melt is relatively high, and it is difficult to use, especially some high-melting point polyesters. Esters, due to the constraints of the use environment, cannot reduce their viscosity by increasing the use temperature. Therefore, the present invention provides a high-melting-point polyester hot-melt adhesive, which has high fluidity while ensuring good physical and mechanical properties and thermal aging stability. [0003] Chinese patent CN101935392A discloses a polyester composition with high fluidity, which includes at least one polyester and at least one fluidity-enhancing component of structure I. [0004] The free-flowing polyester ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C08G63/183C08G63/181C08G63/78
Inventor 李哲龙朱万育李人未曾作祥韩涛马志艳
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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