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Preparation method of polyester hot melt adhesive with good weather resistance

A technology of polyester hot melt adhesive and weather resistance, applied in the direction of adhesives, etc., can solve the problems of brittleness, difficult operation, hot melt adhesive does not have anti-ultraviolet aging, etc.

Inactive Publication Date: 2013-10-09
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

[0003] Chinese patent CN 1714646 A mentioned a polyester hot melt adhesive made of three comonomers, which has the characteristics of high heat resistance, but Its glass transition temperature is also relatively high, and it is easy to become brittle when used outdoors
[0006] Chinese patent CN 101705070 A mentions that terephthalic acid and glycol are added to the catalyst for primary esterification, and then other raw materials are added for secondary esterification. This can improve the conversion rate and reduce costs, but the process is cumbersome and difficult to operate
[0007]The hot melt adhesives mentioned above do not have the performance of anti-ultraviolet aging

Method used

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  • Preparation method of polyester hot melt adhesive with good weather resistance
  • Preparation method of polyester hot melt adhesive with good weather resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 134.5 g (0.81 mol) of terephthalic acid, 89.6 g (0.54 mol) of isophthalic acid, 30.3 g (0.15 mol) of sebacic acid, 189 g (2.1 mol) of 1,4-butanediol, tetratitanate Add 0.10 g of butyl ester and 0.18 g of butyl stannoic acid into a 1 L reaction flask with a distillation device. Gradually raise the temperature to 90°C and start stirring, then rise to 170°C, water begins to distill out, continue to heat up to 210°C, when the distilled amount of water reaches 94% of the theoretical amount, the esterification reaction ends. Add 1.25 g of antioxidant tetraerythritol ester, light-stabilized

[0024] 0.25 g of 4-benzoyloxy-2,2,6,6-tetramethylpiperidine and 1.5 g of nucleating agent talcum powder were used for compression polymerization under reduced pressure. The temperature was raised to 250 °C and the reaction pressure was kept at 100 ~ 140 Pa, react for about 80 minutes, and discharge to obtain copolyester E1.

[0025]

Embodiment 2

[0027] 117.0 g (0.70 mol) of terephthalic acid, 117.0 g (0.70 mol) of isophthalic acid, 18.2 g (0.09 mol) of sebacic acid, 202.5 g (2.25 mol) of 1,4-butanediol, tetratitanate Add 0.076 g of butyl ester and 0.20 g of butyl stannoic acid into a 1 L reaction flask with a distillation device. Gradually raise the temperature to 90°C and start stirring, then rise to 170°C, water begins to distill out, continue to heat up to 210°C, when the distilled amount of water is more than 94% of the theoretical amount, the esterification reaction ends. Add antioxidant tetraerythritol ester 1.26 g, light stabilizer 4-benzoyloxy-2,2,6,6-tetramethylpiperidine 0.25 g and talcum powder 1.5 g to carry out reduced-pressure compression polymerization. 245 ℃, keep the pressure in the reaction bottle at 80 ~ 120 Pa, react for about 100min, and discharge to obtain copolyester E2.

Embodiment 3

[0029] 119.5 g (0.72 mol) of terephthalic acid, 97.1 g (0.585 mol) of isophthalic acid, 39.4 g (0.195 mol) of sebacic acid, 216 g (2.4 mol) of 1,4-butanediol, tetratitanate Add 0.10 g of butyl ester and 0.13 g of butyl stannoic acid into a 1 L reaction flask with a distillation device. Gradually raise the temperature to 90°C and start stirring, then rise to 170°C, water begins to distill out, continue to heat up to 210°C, when the distilled amount of water is more than 94% of the theoretical amount, the esterification reaction ends. Add antioxidant tetraerythritol ester 1.28 g, light stabilizer 4-benzoyloxy-2,2,6,6-tetramethylpiperidine 0.25 g and talcum powder 1.5 g to carry out reduced-pressure compression polymerization. 250 ℃, keep the pressure in the reaction bottle at 80 ~ 100 Pa, react for about 70 minutes, and discharge to obtain copolyester E3.

[0030]

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Abstract

The invention discloses a preparation method of a polyester hot melt adhesive with good weather resistance. The preparation method mainly comprises the following steps of: (1) carrying out esterification reaction on terephthalic acid, isophthalic acid, sebacic acid, and C2-C4 dihydric alcohol under the composite catalysis action of tetrabutyl titanate and butylhydroxyoxo-stannane; and (2) adding an antioxidant of tetrapentaerythritol ester, a light stabilizer, 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and a nucleating agent of talcum powder at normal pressure, and carrying out copolycondensation under reduced pressure for 40-100min at 240-250 DEG C and 50-160Pa to obtain a copolyester product. The product has excellent performances such as low temperature resistance, high temperature resistance, ultraviolet resistance and the like; and the thermal decomposition resistance temperature is above 320 DEG C, the performance of the hot melt adhesive is not greatly changed under the ultraviolet radiation, and therefore the hot melt adhesive can be used as the sticking adhesive for the clothes of outdoor staff.

Description

technical field [0001] The invention relates to a preparation method of a polyester hot-melt adhesive with good weather resistance, and belongs to the technical field of copolyester adhesive synthesis. Background technique [0002] Polyester hot melt adhesive is a thermoplastic product obtained by esterification of dibasic acid and dibasic alcohol. It has a good bonding effect on wood, cardboard, leather, fabric, plastic, etc., and can be made into blocks and films. , strip or granular, which makes packaging, storage, transportation and use more convenient, and the raw materials are relatively easy to obtain and easy to process and produce. [0003] Chinese patent CN 1714646 A mentions a polyester hot-melt adhesive made of three comonomers, which has the characteristics of high heat resistance, but its glass transition temperature is relatively high, and it is easy to become brittle when used outdoors. [0004] Chinese patent CN 102660205A mentions a composition of acrylate...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/85C08K3/34C08K5/103C08K5/3435C09J167/02
Inventor 李哲龙朱万育廖露露曾作祥吴芳群沈艳
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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