Preparation method of biodegradable copolyester hot melt adhesive

A biodegradable, copolyester technology, used in adhesives and other directions, can solve problems such as the impact of degradable properties, and achieve good bonding effect

Active Publication Date: 2018-02-02
KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although CN103468195A proposes a method for synthesizing and preparing biodegradable copolyester hot melt adhesives, wh

Method used

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  • Preparation method of biodegradable copolyester hot melt adhesive

Examples

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Example Embodiment

[0015] Example 1:

[0016] A method for preparing biodegradable copolyester by hot melt, the steps are as follows:

[0017] (1) Dibasic acid composed of 166g terephthalic acid, 66.4g isophthalic acid, 34.5g dodecanedioic acid and 10.1g sebacic acid is composed of 177.3g butanediol and 44.84g 1 , 3-propanediol composed of diol, and a catalyst composed of 0.0107g of tetrabutyl titanate and 0.0107g of antimony acetate, added to the 1L esterification reactor, the reaction temperature is 160℃~205℃, when the ester When the amount of distilled water in the chemical reaction kettle is 95% or more of the theoretical amount of water, the esterification reaction ends;

[0018] (2) Add 1.3345g of the 1010 antioxidant to the product of step (1), carry out the polycondensation reaction for 2.0h under the conditions of 230℃~240℃, 100Pa~150Pa, and then release the vacuum with nitrogen. Get it out of heat.

[0019] The product prepared by Example 1 is labeled A1.

Example Embodiment

[0020] Example 2:

[0021] A method for preparing biodegradable copolyester by hot melt, the steps are as follows:

[0022] (1) Add the dibasic acid and diol as in Example 1, and the catalyst composed of 0.019g tetrabutyl titanate and 0.0237g antimony acetate into a 1L esterification reactor. The reaction temperature 160°C~205°C, when the amount of distilled water in the esterification reactor is 95% or more of the theoretical amount of water, the esterification reaction ends;

[0023] (2) Add 1.6014g of the 1010 antioxidant to the product of step (1), and carry out the polycondensation reaction for 2.0h under the conditions of 230℃~240℃, 100Pa~150Pa, and then release the vacuum with nitrogen. Get it out of heat.

[0024] The product prepared in Example 2 is labeled A2.

Example Embodiment

[0025] Example 3:

[0026] A method for preparing biodegradable copolyester by hot melt, the steps are as follows:

[0027] (1) Add the dibasic acid and dihydric alcohol as in Example 1 and the catalyst composed of 0.0295g of tetrabutyl titanate and 0.0185g of antimony acetate into a 1L esterification reactor. The reaction temperature 160°C~205°C, when the amount of distilled water in the esterification reactor is 95% or more of the theoretical amount of water, the esterification reaction ends;

[0028] (2) Add 1.8683g of 1010 antioxidant to the product of step (1), carry out the polycondensation reaction for 2.0h under the conditions of 230℃~240℃, 100Pa~150Pa, and then release the vacuum with nitrogen. Get it out of heat.

[0029] The product prepared in Example 3 is labeled A3.

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Abstract

The invention discloses a preparation method of a hot melt adhesive, and concretely discloses a preparation method of a biodegradable copolyester hot melt adhesive. The method mainly comprises the following steps: 1, adding diacid formed by mixing terephthalic acid, m-phthalic acid, sebacic acid and , dioil formed by mixing butylene glycol and 1,3-propylene glycol and a catalyst into an esterification kettle, performing an esterification reaction at 160-205 DEG C, and ending the esterification reaction when the volume of water distilled from the esterification kettle is 95% or more of a theoretic water yield; and 2, adding an antioxidant into a product obtained in step 1, carrying out a condensation polymerization reaction at 230-240 DEG C under 100-150 Pa for 2.0 h, introducing nitrogen to release vacuum, and discharging the obtained product while hot to obtain the biodegradable copolyester hot melt adhesive. The biodegradable copolyester hot melt adhesive directly prepared through the synthesis method has a good bonding effect in a certain limitation period (such as twelve months), and can be rapidly degraded under natural conditions after the storage time exceeds the limitationperiod.

Description

technical field [0001] The invention relates to a preparation method of hot melt adhesive, in particular to a preparation method of biodegradable copolyester hot melt adhesive. Background technique [0002] Various types of hot melt adhesives have been widely used in composite bonding in many fields, such as the textile industry, and packaging and sealing of food, beverages, and medicines. At the same time, in the production and preparation process of hot melt adhesives, in the past, only its adhesive properties were generally considered, and its degradation properties were not considered. In recent years, with the substantial increase in the amount of hot-melt adhesives and the gradual enhancement of people's awareness of environmental protection, conventional hot-melt adhesives have strong resistance to microorganisms due to their structural characteristics and are difficult to degrade. Environmental problems caused by existing in the natural environment It is also becomi...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/86C09J167/02
CPCC08G63/183C08G63/866C09J167/02
Inventor 雷何记张勇健郑仁峰
Owner KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD
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