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Polyester hot melt adhesive for making films and preparation method thereof

A technology for polyester hot-melt adhesives and films. It is applied in the direction of adhesives, film/sheet adhesives, etc. It can solve the problems of unsatisfactory film-forming performance, achieve high melt index, short open time, and reduce environmental pollution. The effect of conversion rate

Active Publication Date: 2011-06-22
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyester hot melt adhesive synthesized by the above method is not designed for film making, and its film forming performance is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Terephthalic acid (74.7g) and butanediol (89.1g) and titanium series catalyst Ti(OC 2 h 5 ) 4 (0.031g) was added into a 1.0L esterification kettle, which was equipped with stirring, temperature measuring system, rectification column and reflux condenser. The temperature in the kettle was controlled at 170-175°C under normal pressure to carry out a primary esterification, and the resulting The water is recovered through the rectification system, the rectification reflux ratio is 3.0, and the vapor phase temperature at the top of the column is 95-98°C. Continue the reaction until the vapor phase temperature at the top of the column drops significantly, and the primary esterification reaction ends.

[0019] Adipic acid (62.8g), maleic acid (8.12g), isophthalic acid (8.30g) and propylene glycol (4.18g), neopentyl glycol (5.72g) and catalyst p-toluenesulfonic acid (0.039 g) Put it into the kettle for secondary esterification, the reaction temperature is 180-185°C, the refl...

Embodiment 2

[0022] Terephthalic acid (88.0g) and butanediol (90.7g) and titanium series catalyst Ti(OC 3 h 7 ) 4 (0.105g) was added into a 1.0L esterification kettle, which was equipped with stirring, temperature measuring system, rectification column and reflux condenser. The temperature in the kettle was controlled at 175-180°C under normal pressure to carry out a primary esterification, and the resulting The water is recovered through the rectification system, the rectification reflux ratio is 2.0, and the vapor phase temperature at the top of the column is 96-99°C. Continue the reaction until the vapor phase temperature at the top of the column drops significantly, and the primary esterification reaction ends.

[0023] Adipic acid (43.8g), maleic acid (11.6g), isophthalic acid (11.6g) and propylene glycol (7.30g), neopentyl glycol (9.98g) and catalyst p-toluenesulfonic acid (0.010 g) Put it into the kettle for secondary esterification, the reaction temperature is 185-190°C, the refl...

Embodiment 3

[0026] Terephthalic acid (91.3g) and butanediol (84.2g) and titanium series catalyst Ti(OC 3 h 7 ) 4 (0.125g) was added into a 1.0L esterification kettle, which was equipped with stirring, temperature measuring system, rectification column and reflux condenser. The temperature in the kettle was controlled at 180-185°C under normal pressure to conduct a primary esterification, and the resulting The water is recovered through the rectification system, the rectification reflux ratio is 4.0, the vapor phase temperature at the top of the column is 98-101°C, and the reaction is continued until the vapor phase temperature at the top of the column drops significantly, and the primary esterification reaction ends.

[0027] Adipic acid (58.4g), maleic acid (4.64g), isophthalic acid (1.66g) and propylene glycol (13.7g), neopentyl glycol (8.74g) and catalyst p-toluenesulfonic acid (0.019 g) Put it into the kettle for secondary esterification, the reaction temperature is 190-195°C, the r...

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Abstract

The invention discloses a method for preparing a polyester hot melt adhesive for making films, which comprises the following steps of: (1) adding terephthalic acid, butanediol and a titanium catalyst into an esterification kettle for primary esterification, wherein the reaction temperature is 170-195DEG C; (2) adding adipic acid, maleic acid, isophthalic acid, propylene glycol, neopentyl glycol and a p-toluenesulfonic acid catalyst into the kettle for secondary esterification, wherein the reaction temperature is 180-205DEG C; and (3) adding a stabilizing agent, and performing polycondensation under reduced pressure to obtain the polyester hot melt adhesive product which is quick in crystallization and easily forms a film.

Description

technical field [0001] The invention relates to a method for preparing a polyester hot-melt adhesive for film-making, in particular to a method for preparing a polyester hot-melt adhesive with fast crystallization speed and easy film formation. Background technique [0002] Polyester hot melt adhesive has the advantages of heat resistance, cold resistance, washing resistance, good bonding strength, good insulation performance, etc. It is mainly used in fabric processing, carpet backing, clothing processing, shoemaking, etc. Composite film, auto parts assembly, reinforcement materials, electrical industry are also applied. [0003] Polyester is a general term for ester groups (-CO-O-) in the main chain of polymers. It is divided into two categories: unsaturated polyester and thermoplastic polyester. From the perspective of molecular structure, the molecular straight chain of saturated polyester introduces The phenyl group will increase its melting point, tensile strength and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/06C09J7/00C08G63/52C08G63/78
Inventor 曾作祥孔庆娟李哲龙朱万育韩涛李晓楠
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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