A thermally induced self-healing UV-curable adhesive based on stepwise polymerization mechanism

A technology of gradual polymerization and ultraviolet light, applied in the direction of non-polymer organic compound adhesives, adhesives, etc., can solve problems such as bonding failure and microscopic cracks, achieve reliable bonding performance, avoid internal stress concentration, and have a wide range of applications Effect

Active Publication Date: 2021-03-30
YANTAI DARBOND TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that light-cured pressure-sensitive adhesives are prone to produce microscopic cracks and cause bonding failure in harsh environments, especially under the action of external stress, the present invention provides a thermally induced self-healing UV adhesive based on a gradual polymerization mechanism. Light-curing adhesives to achieve the purpose of solving the above problems

Method used

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  • A thermally induced self-healing UV-curable adhesive based on stepwise polymerization mechanism
  • A thermally induced self-healing UV-curable adhesive based on stepwise polymerization mechanism
  • A thermally induced self-healing UV-curable adhesive based on stepwise polymerization mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment and comparative example

[0026] ①Synthesis of (meth)acrylate random prepolymer

[0027] Add (meth)acrylate viscous monomer, internal polymer monomer, functional monomer, rosin acrylate, blocked isocyanate acrylate and photoinitiator into the three-necked flask in proportion, start stirring at the same time, and purge with high-purity nitrogen solution for 30 minutes until the photoinitiator is completely dissolved, with a light intensity of 0.5 mW / cm 2 The solution is irradiated with ultraviolet light for 30-60s to obtain (meth)acrylate random prepolymer.

[0028] ②Add the multifunctional (meth)acrylate crosslinking agent and photoinitiator in proportion to the above-mentioned (meth)acrylate random prepolymer in sequence, stir and mix evenly to obtain the finished product.

[0029] Table 1: Raw material proportioning of embodiment and comparative example

[0030]

[0031]Description: The raw materials used in the test are EA-ethyl acrylate, BA-n-butyl acrylate, 2-EHA-isooctyl acrylate, MMA-methyl...

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Abstract

The invention provides a heat-induced self-healing UV-curable pressure-sensitive adhesive based on a step-by-step polymerization mechanism. ) 0.5-5 parts of acrylate crosslinking agent, 0.1-5 parts of photoinitiator; wherein, the mass fraction of (meth)acrylate random prepolymer is: 40-100 parts of viscous monomer, 40-100 parts of internal polymer monomer 10-50 parts, functional monomer 10-40 parts, rosin acrylate 5-40 parts, blocked isocyanate acrylate 10-40 parts, photoinitiator 0.1-0.5 parts. The UV-curable pressure-sensitive adhesive prepared by the present invention has a simple synthesis process, low energy consumption, 100% active ingredients, and is environmentally friendly. More importantly, the UV-curable pressure-sensitive adhesive prepared by the present invention has thermal Self-healing properties.

Description

technical field [0001] The invention relates to a self-healing light-curing adhesive and a preparation method thereof, belonging to the technical field of light-curing materials. Background technique [0002] Polymer materials are susceptible to aging due to external light, heat, water, stress, chemical substances or the combined effects of these external factors during use, resulting in micro-cracks on the surface or inside. The existence of these micro-cracks makes the performance of the material And the service life is greatly reduced, and even catastrophic accidents may occur due to the expansion of microcracks. Self-healing polymer materials can realize the self-healing of the microcracks of the material itself by simulating the mechanism of biological damage healing, avoiding further damage and prolonging the service life of the material. Self-healing technology has shown good application prospects and application value in the field of microelectronics, biomedical mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J4/06C09J4/02C08F289/00C08F220/14C08F220/18C08F220/20C08F220/36C08F2/48
CPCC09J4/06C08F2/48C08F289/00C09J2301/302C08F220/1808C08F220/18C08F220/1802C08F220/36
Inventor 王博潘光君王建斌陈田安解海华
Owner YANTAI DARBOND TECH
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