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High-performance polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, high-performance technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of destroying the adhesive strength of the colloid, affecting the life of wearable devices, etc., and achieve excellent reactivity Effective with perspiration resistance, good oil resistance, avoidance of colloid separation

Active Publication Date: 2021-04-16
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyurethane hot melt adhesives have been widely used in the bonding of electronic wearable devices due to their environmental protection, energy saving, fast positioning, and high initial bonding strength. Sweat, grease, etc. will slowly penetrate into the wearable device and destroy the adhesive strength of the colloid, thus affecting the life of the wearable device. In such an environment, how to make the glue less susceptible to sweat and grease so as to maintain the life of the wearable device has become an industry expert. Competing research topics, but traditional hot melt adhesives obviously cannot take care of both

Method used

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  • High-performance polyurethane hot melt adhesive and preparation method thereof
  • High-performance polyurethane hot melt adhesive and preparation method thereof
  • High-performance polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) 20 parts of adipic acid-based polyester diol with a molecular weight of 2000, 30 parts of polycarbonate diol with a molecular weight of 4000, 10 parts of hydroxyl-terminated polybutadiene acrylonitrile, and a multi-arm star with a molecular weight of 715 Add 1 part of hydroxyl-terminated polyester polyol to the reaction kettle, stir and mix evenly, heat up to 115-125°C, and dehydrate for 2 hours under the condition of vacuum degree ≤0.95MPa;

[0028] (2) Cool down to 90-100°C, add 10 parts of diphenylmethane diisocyanate, and react for 1.5h at a temperature of 115-125°C;

[0029] (3) Add 0.05 parts of triethylenediamine, and continue to react for 0.5h at a temperature of 115-125°C and a vacuum degree of ≤0.95MPa;

[0030] (4) Quickly discharge the material under nitrogen protection, and package it in an aluminum foil bag.

Embodiment 2

[0032] (1) 40 parts of polyethylene glycol phthalate diols with a molecular weight of 2000, 40 parts of polycarbonate diols with a molecular weight of 4000, 30 parts of hydroxyl-terminated polybutadiene acrylonitrile, and a molecular weight of 1854 Add 5 parts of multi-arm star-shaped hydroxyl-terminated polyester polyol into the reaction kettle, stir and mix evenly, heat up to 115-125°C, and dehydrate for 2 hours under the condition of vacuum degree ≤0.95MPa;

[0033] (2) Cool down to 90-100°C, add 20 parts of diphenylmethane diisocyanate, and react for 1.5h at a temperature of 115-125°C;

[0034] (3) Add 0.05 part of bismorpholino diethyl ether, 0.05 part of stannous octoate, and continue to react for 0.5 h at a temperature of 115-125 °C and a vacuum degree of ≤0.95 MPa;

[0035] (4) Quickly discharge the material under nitrogen protection, and package it in an aluminum foil bag.

Embodiment 3

[0037] (1) 20 parts of polyethylene glycol phthalate diols with a molecular weight of 3000, 40 parts of polycarbonate diols with a molecular weight of 2500, 20 parts of hydroxyl-terminated polybutadiene acrylonitrile, and a molecular weight of 1000 Add 3 parts of multi-arm star-shaped hydroxyl-terminated polyester polyol into the reaction kettle, stir and mix evenly, heat up to 115-125°C, and dehydrate for 2 hours under the condition of vacuum degree ≤0.95MPa;

[0038] (2) Cool down to 90-100°C, add 14 parts of diphenylmethane diisocyanate, and react for 1.5h at a temperature of 115-125°C;

[0039] (3) Add 0.06 parts of triethanolamine, and continue to react for 0.5 h at a temperature of 115-125 °C and a vacuum degree of ≤0.95 MPa;

[0040] (4) Quickly discharge the material under nitrogen protection, and package it in an aluminum foil bag.

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Abstract

The invention relates to a high-performance polyurethane hot melt adhesive, which is prepared from the following raw materials in parts by mass: 50 to 80 parts of polyester polyol, 10 to 30 parts of hydroxyl-terminated polybutadiene acrylonitrile, 1 to 5 parts of multi-arm star-terminated hydroxyl polyester polyol, 0.05 to 0.1 part of catalyst and 10 to 20 parts of diphenylmethane diisocyanate. According to the invention, hydroxyl-terminated polybutadiene acrylonitrile is introduced into a molecular chain together with polyester polyol to be synergistically blocked into the molecular chain, so that the adhesive has good oil resistance, adhesion and aging resistance on the basis of endowing the adhesive with excellent elasticity. In addition, the multi-arm structure of the multi-arm star hydroxyl-terminated polyester polyol and the telechelic structure of the hydroxyl-terminated polybutadiene acrylonitrile are interspersed to form strong intermolecular Van der Waals' force, and the erosion of substances such as moisture, sweat, grease, oleic acid and the like to colloid can be effectively avoided, so that the excellent performance of the glue is achieved.

Description

technical field [0001] The invention relates to a high-performance polyurethane hot-melt adhesive and a preparation method thereof, in particular to an oleic acid-resistant and cold-resistant liquid polyurethane hot-melt adhesive suitable for bonding difficult-to-bond materials such as plastics in electronic wearable devices and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, the national economy and people's living standards have been continuously improved and flourishing. Throughout the modern industrial field and every aspect of people's daily life, electronic equipment is almost inseparable. In particular, electronic wearable devices have grown exponentially in recent years and have become an indispensable part of people's lives. Electronic wearable devices are not only an expression of people's fashion and taste, but also a healthy lifestyle. In this context, whether the electronic wearable device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08G18/76C08G18/69C08G18/44C08G18/42
Inventor 刘志培王建斌陈田安解海华
Owner YANTAI DARBOND TECH
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