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Polyester thermosol and preparation method thereof

A technology of polyester hot melt adhesive and dimethyl phthalate, which is applied in the direction of adhesives, etc., can solve the problems of backing of interlining and slow curing speed, and achieve the effect of high bonding strength, fast curing speed and short opening time.

Active Publication Date: 2008-02-20
南通天洋光伏材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, from the prior art, the developed polyester hot melt adhesive with a lower melting point has a slower curing speed, which will lead to back sticking during interlining processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 2.0L polymerization reactor with a distillation device, add dimethyl terephthalate (333g), 1,4-butanediol (200g), diethylene glycol (50g), catalyst tetratitanate Butyl ester (0.50g), heating, when the internal temperature reaches 145°C, the material starts to melt, and then starts to stir; when the temperature rises to about 148°C, methanol begins to distill, continue to heat up until the internal temperature reaches 180-195°C, and wait for distillation When the methanol produced reaches 90% of the theoretical amount, the transesterification reaction ends.

[0025] Add isophthalic acid (290g) in the above-mentioned reactant, sebacic acid (7g), 1,4-butanediol (200g), ethylene glycol (30g), and add stabilizer triphenyl phosphite (0.25 g), then stir and heat up. When the internal temperature rises to about 180°C, water begins to distill out. Continue to heat up to 200°C. After the amount of water distilled reaches 89% of the theoretical value, continue to heat up. Whe...

Embodiment 2

[0028] Add dimethyl terephthalate (333g), 1,4-butanediol (210g), diethylene glycol (40g) and catalyst tetraethylene titanate in a 2.0L polymerization reactor with a distillation unit. Ester (0.45g), heating, when the internal temperature reaches 145°C, the material starts to melt, and then starts to stir; when the temperature rises to about 148°C, the methanol begins to distill, continue to heat up until the internal temperature reaches 180-195°C, wait for the distillation When the methanol reached 91% of the theoretical amount, the transesterification reaction ended.

[0029] Add isophthalic acid (290g) in the above-mentioned reactant, adipic acid (8.0g), 1,4-butanediol (190g), ethylene glycol (45g), and add stabilizer triphenyl phosphite ( 0.25g), then stir and heat up. When the internal temperature rises to about 180°C, water begins to distill out. Continue to heat up to 204°C. After the amount of water distilled reaches 91% of the theoretical value, continue to heat up. Wh...

Embodiment 3

[0032] Add dimethyl terephthalate (333g), 1,4-butanediol (200g), 1,3-propanediol (48g) and catalyst tetrapropyl titanate in a 2.0L polymerization reactor with a distillation unit (0.50g), heating, when the internal temperature reaches 145 ℃, the material begins to melt, and then starts to stir; When methanol reaches 92% of the theoretical amount, the transesterification reaction ends.

[0033] Add isophthalic acid (290g) in the above-mentioned reactant, azelaic acid (10g), 1,4-butanediol (200g), ethylene glycol (30g), and add stabilizer triphenyl phosphite (0.25 g), then stir and heat up. When the internal temperature rises to about 180°C, water begins to distill out. Continue to heat up to 205°C. After the amount of water distilled reaches 93% of the theoretical value, continue to heat up. When the internal temperature reaches 230°C °C, to further distill off the oligomers and excess alcohol generated by the reaction, when the distillate decreases or slows down, depressurize...

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PUM

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Abstract

The invention provides a polyester hot melt adhesive and a preparation method thereof, comprising the steps that: (1) in the presence of a catalyst, a transesterification is carried out between a dimethyl terephthalate and a diol; (2) a isophthalic acid, a aliphatic dicarboxylic acid and a stabilizer are mixed with the yield products of the step (1), a decompression and a co-condensation process are carried out so as to obtain a copolymer; (3) the mixture of a sorbic acid metal salt and the copolymer of ethylene KEYI acrylic acid are added in the yield products of step (2), then the copolymer is modified so as to obtain the polyester hot melt adhesive. The invention adopts the sorbic acid metal salt and the copolymer of ethylene acrylic acid to modify the colopolymer. The polyester hot melt adhesive obtained therefrom has the advantages of strong bond performance, positive effects of water cleaning and dry cleaning resistances, short opening time and fast solidification. The polyester hot melt adhesive is especially suitable for a production assembly line which calls for rapid bonding.

Description

technical field [0001] The invention relates to a polyester hot-melt adhesive and a manufacturing method thereof, in particular to a manufacturing method of a polyester hot-melt adhesive based on organic polymer synthesis. Background technique [0002] Polyester hot melt adhesive has a wide range of uses, especially for the bonding process of interlinings. [0003] 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 CN 1760304 obtains a polyester hot-melt adhesive with a low melting point by introducing 3,5-dihydroxytoluene and 3,5-dihydroxybenzoic acid for copolyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/03C08G63/183
Inventor 李哲龙朱万育陶思玉马志艳
Owner 南通天洋光伏材料科技有限公司
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