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Preparation method of biodegradable polyester hot melt adhesive

A technology for degrading polyester and hot melt adhesives, applied in adhesives, adhesive additives, non-polymer adhesive additives, etc.

Inactive Publication Date: 2013-12-25
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

[0004] However, from the prior art, the biodegradable hot-melt adhesives produced are all obtained by blending and modification methods, and there is no technical description on the synthesis and preparation of biodegradable polyester hot-melt adhesives.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a four-necked flask equipped with a thermometer, a mechanical stirrer, and a reflux condenser, add 73.0 g of 1,6-adipic acid, 59.0 g of 1,4-butanedioic acid, 102.6 g of 1,4-butanediol, 1 , 7.08g of 6-hexanediol, 2.64mg of stannous chloride, 2.64mg of benzenesulfonic acid, 2.64mg of n-butyl titanate, blow nitrogen, heat, and stir, open the condensed water, when the temperature in the reactor reaches 140℃ At about 10 minutes, water began to distill out, and the temperature was raised at a constant speed. When the water evaporated reached more than 95% of the theoretical amount, the esterification reaction was completed. Keep warm for 0.5h, continue to heat up to 220°C, and add 0.013g of triphenyl phosphite and 0.017g of graphene to the above reaction system, gradually reduce the pressure until the system pressure is 100Pa, the reaction time is 30min, and the temperature gradually increases from 220°C To 230 ° C, the polycondensation reaction is complete. Under the pro...

Embodiment 2-6

[0023] The steps and process conditions of Embodiment 2-6 are basically the same as those of Example 1. The modified process conditions and raw material ratios are shown in Table 1, and the properties of the resulting product are also listed in Table 1.

[0024] Table 1 Embodiment 2-6 related process parameters and product properties

[0025] Example number 2 3 4 1,6-Hexanedioic acid 73.0 99.28 73.0 1,10-Sebacic acid 64.64 1,12-Dodecanedioic acid 114 1,14-tetradecanedioic acid 1,4-Succinic acid, g 59.0 1,4-Butanediol, g 153.9 114.8 153.9 1,6-Hexanediol, g 36.0 Diethylene glycol, g 23.85 Polyethylene glycol, g 36.0 Tetrabutyl titanate, mg 748 264 325 Benzenesulfonic acid, mg 748 264 264 Stannous chloride, mg 264 264 264 Triphenyl phosphite, g 0.168 0.023 0.078 Graphene, g 0.17 0.08 0.12 Esterification reaction holding time...

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Abstract

The invention discloses a preparation method of a biodegradable polyester hot melt adhesive, which mainly comprises the following steps: (1) adding an aliphatic dibasic acid, 1,4-butanediol and other dibasic alcohols, and a catalyst into a reactor, and carrying out an esterification reaction on the obtained mixture under the protection of nitrogen, wherein the reaction temperature is 120-220 DEG C, and the gas phase temperature is kept at about 98 DEG C; and after the distillate quantity of water is over 95% of a theoretical quantity, completing the esterification reaction; (2) adding a phosphite ester stabilizer and grapheme into the obtained mixture, continuing to heat the obtained mixture to 210-230 DEG C, then carrying out a decompressed polycondensation reaction on the obtained mixture for 0.5-1.5 h so as to obtain a random copolymer, and freezing and crushing the random copolymer so as to obtain copolymer powder.

Description

technical field [0001] The invention relates to a preparation method of biodegradable polyester hot melt adhesive. Background technique [0002] In the production of hot melt adhesives, in the past, only its adhesive properties were generally considered, and its degradation was not considered. In recent years, with the sharp increase in the use of hot melt adhesives, the problems caused by them have become increasingly prominent. The most commonly used matrix resins for the production of hot melt adhesives are ethylene and its copolymers, copolyesters, copolyamides, styrene and its block copolymers and other high-molecular organic substances. Due to their structural characteristics, they cannot be used by microorganisms in the environment. Degradation or hydrolysis will bring many unfavorable factors to environmental protection and material recycling. With the improvement of environmental regulations and the enhancement of people's awareness of environmental protection, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C09J11/04C09J11/06C08G63/16C08G63/672C08G63/85
Inventor 李哲龙朱万育吴芳群曾作祥沈艳
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD