Acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive as well as preparation method and application thereof

A water-based polyurethane and acrylic technology, used in 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: 2020-06-12
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 pro

Method used

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  • Acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive as well as preparation method and application thereof
  • Acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive as well as preparation method and application thereof
  • Acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] A preparation method of acrylic modified water-based polyurethane self-repairing pressure-sensitive adhesive, comprising the following steps:

[0077] (1) Under the conditions of 120°C and -0.1MPa, vacuum dewater polytetrahydrofuran ether glycol 2000 and dimethylol propionic acid;

[0078] (2) Take dry polytetrahydrofuran ether diol 2000 (20g, 10mmol), dimethylolpropionic acid (2.00g, 14.91mmol), hexamethylene diisocyanate (10.00g, 59.46mmol), alloxan- Hydrate (2.00g, 12.49mmol), dibutyltin dilaurate (0.09g, 0.14mmol), antioxidant 1135 (0.10g, 0.26mmol) and acetone 30mL were added to a four-necked flask, heated to 86°C, and stirred for 3.5 h; wherein, the structural formula of alloxan monohydrate is as figure 1 Shown in Figure A.

[0079] (3) Cool down to below 55°C, add 2,4,6-triaminopyrimidine (1.56g, 12.48mmol) and trimethylolpropane (0.8g, 5.96mmol) to the reaction system in step (2), and heat up to 70°C, stirring reaction for 2h; wherein, the structural formula ...

Embodiment 2

[0085] A preparation method of acrylic modified water-based polyurethane self-repairing pressure-sensitive adhesive, comprising the following steps:

[0086] (1) Under the conditions of 120°C and -0.1MPa, vacuum dewater polytetrahydrofuran ether glycol 2000 and dimethylol propionic acid;

[0087] (2) Take dry polytetrahydrofuran ether diol 2000 (20g, 10mmol), dimethylolpropionic acid (2.00g, 14.91mmol), hexamethylene diisocyanate (10.00g, 59.46mmol), alloxan- Hydrate (2.00g, 12.49mmol), dibutyltin dilaurate (0.09g, 0.14mmol), antioxidant 1135 (0.10g, 0.26mmol) and acetone 30mL were added to a four-necked flask, heated to 86°C, and stirred for 3.5 h; wherein, the structural formula of alloxan monohydrate is as figure 1 Shown in Figure A.

[0088] (3) Cool down to below 55°C, add 2,4,6-triaminopyrimidine (1.56g, 12.48mmol) and trimethylolpropane (0.8g, 5.96mmol) to the reaction system in step (2), and heat up to 70°C, stirring reaction for 2h; wherein, the structural formula ...

Embodiment 3

[0094] A preparation method of acrylic modified water-based polyurethane self-repairing pressure-sensitive adhesive, comprising the following steps:

[0095] (1) Under the conditions of 120°C and -0.1MPa, remove water from polyethylene glycol 1000 and dimethylol propionic acid in vacuum;

[0096](2) Take dry polyethylene glycol 1000 (10g, 10mmol), dimethylolpropionic acid (2.00g, 14.91mmol), hexamethylene diisocyanate (10.00g, 59.46mmol), alloxan monohydrate (2.00g, 12.49mmol), dibutyltin dilaurate (0.09g, 0.14mmol), antioxidant 1135 (0.10g, 0.26mmol) and acetone 30mL were added to a four-necked flask, heated to 86°C, and stirred for 3.5h; Wherein, the structural formula of alloxan monohydrate is as follows figure 1 Shown in Figure A.

[0097] (3) Cool down to below 55°C, add 2,4,6-triaminopyrimidine (1.56g, 12.48mmol) and trimethylolpropane (0.8g, 5.96mmol) to the reaction system in step (2), and heat up to 70°C, stirring reaction for 2h; wherein, the structural formula of...

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Abstract

The invention discloses an acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive as well as a preparation method and application thereof. The invention provides a preparation method of an acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive, which comprises the following steps: stirring polymer diol, hydrophilic carboxylic aciddiol, diisocyanate, alloxan monohydrate, an antioxidant, a catalyst and an organic solvent to react, thereby generating an isocyanate-terminated first prepolymer; adding 2,4,6-triaminopyrimidine anda cross-linking agent into the first prepolymer to obtain a second prepolymer; then adding acrylic acid small molecules and acrylic acid oligomers, carrying out a reaction, then adding a neutralizer to react to form salt, and then adding an aqueous solution containing a small molecule chain extender to obtain an emulsion; and adding an alkene monomer initiator, and carrying out a reaction to obtain the acrylic acid modified waterborne polyurethane self-repairing pressure-sensitive adhesive. The high-strength toughness self-repairing waterborne polyurethane pressure-sensitive adhesive providedby the invention has good mechanical properties, self-repairing performance, thermal stability and high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of preparation of water-based polyurethane pressure-sensitive adhesives and novel polymer functional materials, and in particular relates to an acrylic modified water-based polyurethane self-repairing pressure-sensitive adhesive and its preparation method and application. Background technique [0002] Pressure-sensitive adhesive is a kind of adhesive that is sensitive to pressure. Under the action of external pressure, it can be tightly attached to the surface of the object to form an adhesion effect, and when the adherend surface is damaged, the adhesive will not Pollution and damage to the surface of the adherend. Pressure-sensitive adhesives have both the viscous properties of liquid and the elastic properties of solids. Without the need for external heat sources and solvents, the adherend can be firmly bonded only by lightly pressing it, and has long-lasting adhesion. . The pressure-sensitive propertie...

Claims

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Application Information

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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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