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Biodegradable copolyester hot melt adhesive and preparation method thereof

A biodegradable, hot-melt adhesive technology, used in adhesives and other directions, can solve the problems of uneven melt blending and granulation performance, slow degradation of hot melt adhesives, and low melt spinning efficiency, and achieve excellent spinnability, good Tensile strength and bonding effect, the effect of simple and easy preparation method

Pending Publication Date: 2022-03-15
SHANGHAI DONGRUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a biodegradable copolyester hot-melt adhesive and its preparation method. Starting from the monomer, the in-situ polymerization block copolymerization process is used to prepare a biodegradable and photodegradable copolyester with uniform performance. Polyester hot-melt adhesive to overcome the problems of slow degradation rate and low degradation rate of existing copolyester hot-melt adhesives, uneven product melt blending and granulation performance, cumbersome preparation process, and low melt spinning efficiency in the later stage

Method used

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  • Biodegradable copolyester hot melt adhesive and preparation method thereof
  • Biodegradable copolyester hot melt adhesive and preparation method thereof
  • Biodegradable copolyester hot melt adhesive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Biodegradable copolyester hot-melt adhesive, its preparation method comprises the following steps:

[0029] (1) 142g 1,6 adipic acid, 104.3g 1,4-butanediol, 39.2g polydimethylsiloxane (the number average molecular weight is 400), 40.3g polyethylene glycol (the number average molecular weight is 400) and 0.08g of tetrabutyl titanate were put into the No. 1 esterification reaction kettle, and the reaction temperature was adjusted to 150-190°C; when the distilled water in the esterification kettle was 95% or more of the theoretical water output, the esterification reaction was completed and obtained Esterification solution A;

[0030] 242g terephthalic acid, 169.2g 1,4 butanediol, 60g polydimethylsiloxane (number average molecular weight 400), 65.4g polyethylene glycol (number average molecular weight 400) and 0.13g titanic acid Tetrabutyl ester is put into No. 2 esterification reaction kettle, and the reaction temperature is adjusted to 190-230°C; when the distilled wate...

Embodiment 2

[0034] Biodegradable copolyester hot-melt adhesive, its preparation method comprises the following steps:

[0035] (1) 177.4g 1,6 adipic acid, 130.8g 1,4-butanediol, 23.6g polydimethylsiloxane (number average molecular weight is 400), 50.6g polyethylene glycol (number average molecular weight 400) and 0.09g of tetrabutyl titanate were put into the No. 1 esterification reaction kettle, and the reaction temperature was adjusted to 150-190°C; when the distilled water in the esterification kettle was 95% or more of the theoretical water output, the esterification reaction ended Obtain esterification solution A;

[0036] 201.7g terephthalic acid, 140.8g 1,4-butanediol, 24.2g polydimethylsiloxane (the number average molecular weight is 400), 54.4g polyethylene glycol (the number average molecular weight is 400) and 0.1 g tetrabutyl titanate is put into the No. 2 esterification reaction kettle, and the reaction temperature is adjusted to 190-230°C; when the distilled water in the es...

Embodiment 3

[0040] Biodegradable copolyester hot-melt adhesive, its preparation method comprises the following steps:

[0041] (1) 142g 1,6 adipic acid, 96.5g 1,4-butanediol, 39.2g polydimethylsiloxane (the number average molecular weight is 400), 75.7g polyethylene glycol (the number average molecular weight is 400) and 0.1g of dibutyltin dilaurate are put into No. 1 esterification reaction kettle, and the reaction temperature is adjusted to 150-190°C; when the distilled water in the esterification kettle is 95% or more of the theoretical water output, the esterification reaction is completed to obtain Esterification solution A;

[0042] 242g terephthalic acid, 167.5g 1,4-butanediol, 60g polydimethylsiloxane (number average molecular weight is 400), 131.4g polyethylene glycol (number average molecular weight is 400) and 0.15g dimethicone Put dibutyltin laurate into the No. 2 esterification reaction kettle, adjust the reaction temperature to 190-230°C; when the distilled water in the est...

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Abstract

The invention relates to a biodegradable copolyester hot melt adhesive and a preparation method thereof. The preparation method comprises the following steps: carrying out esterification reaction on aliphatic dibasic acid, dihydric alcohol, polysiloxane, polyether polyol and an esterification catalyst to obtain an esterification liquid A; carrying out esterification reaction on aromatic dibasic acid, aliphatic dihydric alcohol, polysiloxane, polyether polyol and an esterification catalyst to obtain esterification liquid B; mixing the esterification liquid A, the esterification liquid B, an esterification catalyst, a photocatalyst, a heat stabilizer and an antioxidant, and reacting for 30-50 minutes at the temperature of 210-230 DEG C and the low vacuum of 1000-700 Pa; raising the temperature to 235-240 DEG C, keeping the vacuum at 70-120 Pa, and carrying out condensation polymerization reaction for 2-3 hours; and discharging while hot, granulating and drying. The photodegradability is achieved by utilizing the easy peroxidation of polyether, and the product not only has excellent spinnability, tensile strength and bonding effect, but also has biodegradability and photodegradability.

Description

technical field [0001] The invention belongs to the technical field of polyester hot melt adhesives, in particular to a biodegradable copolyester hot melt adhesive and a preparation method thereof. Background technique [0002] With the continuous improvement of living standards, people pay more and more attention to the quality of ecological environment. With the continuous development of light industry, all kinds of chemical fibers have become indispensable in people's daily life, industrial and agricultural production, and their consumption is huge. Traditional chemical fibers have a high melting point and high crystallinity, and their waste is usually not easy to degrade, which brings a great burden to the ecological environment. Therefore, it is of great practical significance to study degradable polymer fiber. Degradable copolyester hot melt adhesive can be used in composite bonding and fiber blending in many fields, such as non-woven fabrics, textile fibers, shoe ma...

Claims

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Application Information

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IPC IPC(8): C09J167/02C08G63/695C08G63/85C08G63/86
CPCC09J167/02C08G63/6956C08G63/85C08G63/866Y02W90/10
Inventor 关欣杜敏郭新斌
Owner SHANGHAI DONGRUI CHEM
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