Photoactive Polymer Composition for Adhesive Strength and Holding Power
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Solution Overview
Problem
Existing adhesives exhibit insufficient adhesive strength and holding power.
Innovation Solution
A polymer composition comprising a compound with two or more constituent units derived from a monomer having a radical polymerizable group and a terminal radical polymerizable group, which generates an active species by photoexcitation, combined with a polymer having a glass transition temperature of 0°C or lower, forms a cross-linked structure upon irradiation, enhancing adhesive strength and holding power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional adhesive composition is used, then the adhesive can be applied, but the adhesive strength and holding power are insufficient
Solution Approach 1:
The patent uses a composite adhesive system combining (meth)acrylic copolymer, silicone-containing prepolymer, and photopolymerization initiator to achieve both adequate adhesion and improved holding power through synergistic interactions between different material components
Solution Approach 2:
The patent modifies the chemical composition parameters of the adhesive, specifically incorporating silicone-containing prepolymers with ethylenically-unsaturated groups and photopolymerizable groups, and adjusts the molecular structure to achieve Tg of 0°C or lower, thereby improving both adhesive strength and holding power
2Strength
If cross-linking is introduced to improve adhesive properties, then adhesive strength improves, but the composition complexity increases
Solution Approach 1:
The patent combines multiple functional groups within a unified adhesive composition: the (meth)acrylic copolymer provides base adhesion, the silicone-containing prepolymer contributes to flexibility and strength, and the photopolymerization initiator enables cross-linking, all working together in a single integrated system
Solution Approach 2:
The patent replaces complex mechanical cross-linking processes with photochemical cross-linking initiated by UV or visible light irradiation, allowing cross-linking to occur in situ without additional mechanical processing steps
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition improves adhesive strength, holding power, and substrate contamination resistance through cross-linking, utilizing a compound that generates active species by photoexcitation and forms graft copolymers.
Implementation Method 1
a monomer M includes a monomer m having a structure that generates an active species by photoexcitation
Implementation Method 2
a compound comprising two or more constituent units derived from a monomer M having a radical polymerizable group; and a radical polymerizable group A at a terminal
Data Source
AI summary
A compound including two or more constituent units derived from a monomer M having a radical polymerizable group and having a radical polymerizable group A at the terminal, in which the monomer M includes a monomer m having a structure that generates an active species by photoexcitation.