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Method for manufacturing linear copolyester hot melt adhesive

A technology of copolyester and hot melt adhesive, applied in the direction of adhesives, etc., can solve the problems of not being able to use adhesive film or double-sided adhesive omentum products, reducing the crystallinity and melting point of copolyester, and slow curing speed, etc.

Inactive Publication Date: 2008-08-20
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But from prior art, produced low-melting point copolyester hot-melt adhesive, all added the raw material of nonlinear molecular structure in the preparation process, as isophthalic acid, and thus break copolyester molecular linear structure structure , reduce the crystallinity and melting point of copolyester to meet the requirements of various industries such as clothing
On the other hand, due to the slow crystallization rate, its solidification rate is also slow, and this will lead to the sticking phenomenon in the process of interlining processing. Can not be used to prepare the corresponding adhesive film or double-sided adhesive film products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a 2.0L polymerization reactor with a distillation unit, add dimethyl terephthalate (333g), 1,4-butanediol (200g), ethylene glycol (15g), catalyst tetrabutyl titanate ( 0.50g), heating, when the internal temperature reaches 150°C, the material melts, and then starts to stir; when the temperature rises to about 152°C, methanol begins to distill out, and the temperature continues to rise until the internal temperature reaches 190°C, and the methanol to be distilled reaches the theoretical amount At 90% of the time, the transesterification reaction ends.

[0019] Add sebacic acid (206g), azelaic acid (38.4g), dodecanoic acid (50g), 1,4-butanediol (117g), 1,3-propanediol (22.8g) in the above reactant, Add ethylene glycol (18.6g) and add stabilizer triphenyl phosphite (0.25g), then stir and raise the temperature. When the internal temperature rises to about 192°C, water begins to distill out, and the temperature continues to rise to 200°C. After the distillate amount reac...

Embodiment 2

[0022] Add dimethyl terephthalate (333g), 1,4-butanediol (220g), diethylene glycol (40g) and catalyst tetraisotitanate in a 2.0L polymerization reactor with a distillation device. Propyl ester (0.48g), heating, when the internal temperature reaches 150°C, the material melts, and then starts to stir; when the temperature rises to about 152°C, methanol begins to distill, and continues to heat up until the internal temperature reaches 205°C, the methanol to be distilled When reaching 92% of the theoretical amount, the transesterification reaction ends.

[0023] Add sebacic acid (103g), adipic acid (120g), azelaic acid (19.2g), dodecanoic acid (93.6g), 1,4-butanediol (160g), 1, 3-propanediol (20g), 1,3-hexanediol

[0024] (23.6g), and added stabilizer triphenyl phosphite (0.25g), then stirred and heated up, when the internal temperature rose to about 180°C, water began to distill out, and continued to heat up to 205°C, the amount of water distilled After reaching 92% of the theo...

Embodiment 3

[0027] Add dimethyl terephthalate (333g), 1,4-butanediol (220g), 1,3-propanediol (38g) and catalyst tetraethyl titanate in a 2.0L polymerization reactor with a distillation unit (0.40g), heating, when the internal temperature reaches 150°C, the material melts, and then starts to stir; when the temperature rises to about 152°C, methanol begins to distill, and continues to heat up until the internal temperature reaches 198°C, and the methanol to be distilled reaches the theoretical level. At 93% of the amount, the transesterification reaction ends.

[0028] Add sebacic acid (164.8g), adipic acid (75g), azelaic acid (19.2g), dodecanoic acid (70.2g), 1,4-butanediol (150g), 1 , 3-propanediol (30g), 1,3-hexanediol (35.4g), and add stabilizer triphenyl phosphite (0.25g), then stir and heat up, when the inner temperature rises to about 198°C, there will be The water is distilled out, and the temperature continues to rise to 220°C. After the amount of water distilled reaches 95% of th...

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PUM

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Abstract

The invention provides a method for preparing linear copolyester hot melt rubber, which includes the following steps: (1) dimethyl terephthalate and diol are done with transesterification reaction under the effect of catalyst; (2) aliphatic series dibasic carboxylic acid and stabilizer are added into the product of step (1), obtaining copolymer by decompression and copolycondensation, and obtaining the hot melt rubber. The method for preparing the linear copolyester hot melt rubber adopts linear symmetrical dibasic carboxylic acid as raw material, and the linear copolyester hot melt rubber obtained with diol is characterized by being strong in adhesive strength, fast in crystallization speed, and resistant in water washing and dry washing, and is especially suitable for preparing the corresponding glue film or two sided rubber net interface product.

Description

technical field [0001] The invention relates to a preparation method of a copolyester hot-melt adhesive. Background technique [0002] Currently known polyester hot-melt adhesives are all obtained by transesterification and esterification of dibasic acid esters, dibasic carboxylic acids and dibasic alcohols, followed by reduced-pressure compression polymerization. For example, USP 6255443 discloses a method for preparing a low-melting-point copolyester hot-melt adhesive, and Chinese patent CN 1340585 proposes a high-melting-point copolyester hot-melt adhesive synthesis technology. Chinese patent 200710043238.2 modifies copolyester by metal salt of sorbic acid and an ethylene / acrylic acid copolymer to obtain a polyester hot melt adhesive with better performance. [0003] But from prior art, produced low-melting point copolyester hot-melt adhesive, all added the raw material of nonlinear molecular structure in the preparation process, as isophthalic acid, and thus break copol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/03C08G63/46C08G63/183
Inventor 李哲龙朱万育马志艳陶思玉
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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