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A kind of acrylic acid modified waterborne polyurethane self-healing pressure-sensitive adhesive and its preparation method and application

A water-based polyurethane and acrylic technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, ester copolymer adhesives, etc., can solve the problems of easy residual glue, poor high temperature resistance, poor water resistance, etc., and achieve adhesion Improved effect

Active Publication Date: 2021-10-19
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with solvent-based pressure-sensitive adhesives, although water-based polyurethane pressure-sensitive adhesives have great environmental advantages, they still have problems such as poor water resistance, insufficient thermal stability, poor high-temperature resistance, and easy residual adhesive, which seriously affect their wide application.

Method used

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  • A kind of acrylic acid modified waterborne polyurethane self-healing pressure-sensitive adhesive and its preparation method and application
  • A kind of acrylic acid modified waterborne polyurethane self-healing pressure-sensitive adhesive and its preparation method and application
  • A kind of acrylic acid modified waterborne polyurethane self-healing pressure-sensitive adhesive and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Method for preparing acrylic modified aqueous polyurethane self-repair pressure sensitive glue, including the following steps:

[0076] (1) Under 120 ° C, -0.1 mPa, the polytetrahydrofuranol 2000, dihydroxymethropac is vacuum dehydration;

[0077] (2) Take the dried polytetrahydrofuran ether glycol 2000 (20 g, 10 mmol), dihydroxymethyl propionic acid (2.00 g, 14.91 mmol), hexamethylene diisocyanate (10.00 g, 59.46 mmol), Alooa A hydrate (2.00 g, 12.49 mmol), dibutyl tin (0.09 g, 0.14 mmol), anti-oxidant 1135 (0.10 g, 0.26 mmol) and acetone 30 mL were added to the four flasks, warmed to 86 ° C, stir Reaction 3.5 h; wherein the structural formula of the olyrene hydrate is figure 1 A figure shown in the map.

[0078] (3) Cooling to 55 ° C or less, 2,4,6-trisoprimidine (1.56 g, 12.48 mmol), trimethylolpropane (0.8 g, 5.96 mmol), temperature rise to step (2) reaction system. 70 ° C, stirring reaction 2 h; wherein the structural formula of 2,4,6-tripyrimidine is figure 1 The B fi...

Embodiment 2

[0084] Method for preparing acrylic modified aqueous polyurethane self-repair pressure sensitive glue, including the following steps:

[0085] (1) Under 120 ° C, -0.1 mPa, the polytetrahydrofuranol 2000, dihydroxymethropac is vacuum dehydration;

[0086] (2) Take the dried polytetrahydrofuran ether glycol 2000 (20 g, 10 mmol), dihydroxymethyl propionic acid (2.00 g, 14.91 mmol), hexamethylene diisocyanate (10.00 g, 59.46 mmol), Alooa A hydrate (2.00 g, 12.49 mmol), dibutyl tin (0.09 g, 0.14 mmol), anti-oxidant 1135 (0.10 g, 0.26 mmol) and acetone 30 mL were added to the four flasks, warmed to 86 ° C, stir Reaction 3.5 h; wherein the structural formula of the olyrene hydrate is figure 1 A figure shown in the map.

[0087] (3) Cooling to 55 ° C or less, 2,4,6-trisoprimidine (1.56 g, 12.48 mmol), trimethylolpropane (0.8 g, 5.96 mmol), temperature rise to step (2) reaction system. 70 ° C, stirring reaction 2 h; wherein the structural formula of 2,4,6-tripyrimidine is figure 1 The B fi...

Embodiment 3

[0093] Method for preparing acrylic modified aqueous polyurethane self-repair pressure sensitive glue, including the following steps:

[0094] (1) Under 120 ° C, -0.1 mPa, the polyethylene glycol 1000, dihydroxymethropac is vacuum dehydration;

[0095](2) Take the dried polyethylene glycol 1000 (10 g, 10 mmol), dihydroxymethyl proppropionic acid (2.00 g, 14.46 mmol), hexamethylene diisocyanate (10.00 g, 59.46 mmol), Al-Krea (2.00g, 12.49 mmol), Dikutanikhalate (0.09 g, 0.14 mmol), antioxidant 1135 (0.10 g, 0.26 mmol) and acetone 30 ml Add four flasks, warmed to 86 ° C, stirring reaction 3.5 H; wherein the structural formula of the olyrene hydrate is as figure 1 A figure shown in the map.

[0096] (3) Cooling to 55 ° C or less, 2,4,6-trisoprimidine (1.56 g, 12.48 mmol), trimethylolpropane (0.8 g, 5.96 mmol), temperature rise to step (2) reaction system. 70 ° C, stirring reaction 2 h; wherein the structural formula of 2,4,6-tripyrimidine is figure 1 The B figure in the B is shown.

...

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Abstract

The invention discloses an acrylic modified waterborne polyurethane self-repairing pressure-sensitive adhesive, a preparation method and application thereof. The preparation method of the acrylic modified water-based polyurethane self-repairing pressure-sensitive adhesive provided by the present invention comprises the following steps: polymer diol, hydrophilic carboxylic acid diol, diisocyanate, alloxan monohydrate, antioxidant, catalyst Stir and react with an organic solvent to generate the first prepolymer terminated with isocyanate; add 2,4,6-triaminopyrimidine and a cross-linking agent to it to obtain the second prepolymer; then add acrylic small molecules and acrylic low Polymer, reaction, and then add neutralizing agent to react to form a salt, then add an aqueous solution containing a small molecule chain extender to obtain an emulsion; then add an ethylenic monomer initiator, and react to obtain an acrylic modified waterborne polyurethane self-healing pressure-sensitive adhesive . The high-strength toughness self-repairing waterborne polyurethane pressure-sensitive adhesive provided by the invention has good mechanical properties, self-repairing performance, thermal stability and high temperature resistance.

Description

Technical field [0001] The present invention belongs to the preparation of aqueous polyurethane pressure sensitive rubber and new polymer functional materials, and in particular, the present invention relates to an acrylic modified aqueous polyurethane self-repair pressure sensitive glue and a preparation method thereof. Background technique [0002] The pressure-sensitive adhesive is a class of adhesives that have sensitivity to the pressure. Under the action of the external pressure, it can fit the surface of the object to form an adhesion, and when it is destroyed, the adhesive is not Pollution, destroy the surface of the adherend. The pressure-sensitive rubber has a liquid viscous property and a solid elastic property that can be firmly bonded by gently pressing the adherend without external heat sources, and has a long-lasting adhesiveness. . This pressure-sensitive performance of pressure sensitive adhesive makes it widely used. Pressive sensitive adhesive is widely used in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J133/10C09J11/08C08G18/75C08G18/73C08G18/67C08G18/66C08G18/48C08G18/44C08G18/32C08G18/34C08G18/12
CPCC08G18/12C08G18/3206C08G18/348C08G18/3829C08G18/3848C08G18/4018C08G18/44C08G18/4854C08G18/672C08G18/673C08G18/73C08G18/758C09J11/08C09J175/14C08G18/3228C08G18/6692C08L33/10
Inventor 史珺张恩丁黄晓梅姚鸣峰肖璐琪吴昆
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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