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Preparation method of polyester hot melt adhesive used for shoes

A technology for polyester hot-melt adhesives and shoes, which is applied in the direction of adhesives, etc., and can solve the problems of unfavorable automatic assembly line operation, long opening time, short opening time, etc.

Active Publication Date: 2013-09-11
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

Chinese patent CN11138841 adopts transesterification method to prepare polyester hot-melt adhesive with high melting point, but due to the by-product methanol of this process, it is easy to pollute the environment
Chinese patent CN102492388A has mentioned a kind of preparation method of high-melting point polyester hot-melt adhesive, but its open time is longer, is unfavorable for automatic assembly line operation; In order to overcome various defects of prior art, the present invention adopts direct esterification method, synthesized A short open time, high melting point polyester hot melt adhesive suitable for shoemaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Terephthalic acid 166.00g (1.00mol), terephthalic acid 29.88g (0.18mol), adipic acid 46.72g (0.32mol), 1,4 butanediol 135.00g (1.50mol), hexanediol 53.10 g (0.45mol), 31.80g (0.30mol) of diethylene glycol, 0.39g of dibutyltin oxide, and 0.05g of tetrabutyl titanate were added to a 1L reactor. The reaction kettle is equipped with 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, and the distillation temperature is 96-100°C. Raise the temperature to about 205°C, and the esterification reaction ends when the water output reaches more than 93% of the theoretical value.

[0018] Then add 0.41 g of triphenyl phosphite to carry out reduced-pressure compression polymerization, gradually increase the temperature to 250° C., and keep warm; the pressure in the reactor is gradually reduced to 90 Pa and maint...

Embodiment 2

[0021] 166.00 g (1.00 mol) of terephthalic acid, 23.24 g (0.14 mol) of terephthalic acid, 81.76 g (0.56 mol) of adipic acid, 126.00 g (1.40 mol) of 1,4 butanediol, 69.62 g of hexanediol g (0.59mol), 59.36g (0.56mol) of diethylene glycol, 0.54g of dibutyltin oxide, and 0.10g of tetrabutyl titanate were added to a 1L reactor. The reaction kettle is equipped with 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, and the distillation temperature is 96-100°C. Raise the temperature to about 205°C, and the esterification reaction ends when the water output reaches more than 93% of the theoretical value.

[0022] Then add 0.54 g of triphenyl phosphite to carry out reduced-pressure compression polymerization, gradually increase the temperature to 253° C., and keep warm; the pressure in the reactor is gradually r...

Embodiment 3

[0025] Terephthalic acid 166.00g (1.00mol), terephthalic acid 33.20g (0.20mol), adipic acid 73.00g (0.50mol), 1,4 butanediol 135.00g (1.50mol), hexanediol 84.96 g (0.72mol), 34.98g (0.33mol) of diethylene glycol, 0.65g of dibutyltin oxide, and 0.16g of tetrabutyl titanate were added to a 1L reaction kettle. The reaction kettle is equipped with 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, and the distillation temperature is 96-100°C. Raise the temperature to about 205°C, and the esterification reaction ends when the water output reaches more than 93% of the theoretical value.

[0026] Then add 0.60 g of triphenyl phosphite to carry out reduced-pressure compression polymerization, gradually increase the temperature to 254° C., and keep warm; the pressure in the reactor is gradually reduced to 90 Pa a...

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Abstract

The invention discloses a preparation method of a polyester hot melt adhesive used for shoes. The preparation method comprises the following steps of: (1) performing an esterification reaction on terephthalic acid, isophthalic acid, adipic acid, butanediol, hexanediol and diethylene glycol under the effects of a tin / titanium composite catalyst; and (2) adding a stabilizer and an antioxidant to the product obtained in step (1) for pressure-reduced condensation polymerization so as to obtain the polyester hot melt adhesive used for the shoes, wherein the polyester hot melt adhesive used for the shoes has a high melting point and is short in opening hours.

Description

technical field [0001] The invention relates to a preparation method of polyester hot-melt adhesive for shoemaking, in particular to a preparation method of high-melting polyester hot-melt adhesive for shoes with short open time. Background technique [0002] Aromatic dibasic acid or dibasic acid dimethyl polyester hot melt adhesive, due to its complex composition, long open time, low melt index, easy to open glue for shoes. Chinese patent CN11138841 adopts transesterification method to prepare polyester hot-melt adhesive with high melting point, but because methanol is produced by-product in this process, it is easy to pollute the environment. Chinese patent CN102492388A has mentioned a kind of preparation method of high melting point polyester hot melt adhesive, but its open time is longer, is unfavorable for automatic assembly line operation; In order to overcome various defects of prior art, the present invention adopts direct esterification method, synthesized A high m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/85C09J167/02
Inventor 李哲龙朱万育雷何记曾作祥吴芳群沈艳
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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