Pressure-Sensitive Adhesive Composition for Wet and Underwater Bonding
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Solution Overview
Problem
Existing pressure-sensitive adhesives struggle to maintain sufficient adhesive force on wet surfaces, including those in water, necessitating the development of a composition that can bond effectively in such conditions.
Innovation Solution
A pressure-sensitive adhesive composition incorporating a compound with a specific substituent structure, where the distance between hydroxyl groups is within a certain range, enabling strong hydrogen bonding and chemical bonding with wet surfaces, including those in water, is used to form a pressure-sensitive adhesive layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pressure-sensitive adhesives are used, then they provide basic adhesive functionality, but they fail to maintain sufficient adhesive force on wet surfaces including underwater
Solution Approach 1:
The invention changes the chemical structure parameters of the adhesive polymer by introducing specific substituents (boronic acid derivatives, phosphonic acid derivatives, or carboxylic acid derivatives) with precise structural characteristics. These parameter changes enable the adhesive to form strong chemical bonds with wet surfaces, transforming it from a conventional adhesive that fails in wet conditions to one that maintains high adhesive force underwater.
Solution Approach 2:
The invention creates a composite adhesive system by combining a polymer base with specific functional substituents (boronic acid, phosphonic acid, or carboxylic acid derivatives). This composite structure integrates the adhesive properties of the polymer with the water-resistant bonding capabilities of the functional groups, enabling the material to function effectively in wet environments while maintaining its pressure-sensitive adhesive characteristics.
2Reliability
If the adhesive is designed to bond strongly to wet surfaces, then adhesive force in water improves, but the complexity of the composition increases
Solution Approach 1:
The invention applies local quality by introducing specific functional substituents at particular locations within the polymer structure. Rather than changing the entire polymer composition, the invention selectively incorporates boronic acid, phosphonic acid, or carboxylic acid derivatives as substituents on the polymer chain, providing water-resistant bonding capability at specific sites while maintaining the overall simplicity of the pressure-sensitive adhesive system.
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 achieves high adhesive force on both dry and wet surfaces, including underwater applications, by enhancing bonding through hydrogen and chemical interactions.
Implementation Method 1
the pressure-sensitive adhesive composition contains a compound having a substituent in which a distance between hydroxyl groups is set to a specific range
Implementation Method 2
a compound having a substituent capable of chemically bonding to an adherend as one component of a pressure-sensitive adhesive composition
Data Source
AI summary
The present invention relates to a pressure-sensitive adhesive composition including a compound having a substituent represented by the general formula (1) described in the specification, in which when each of R1 and R2 in the substituent represented by the general formula (1) represents a hydrogen atom, a distance between an oxygen atom of —OR1 and an oxygen atom of —OR2 is 1.31 Å or more and 4.70 Å or less, a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition, and a pressure-sensitive adhesive sheet comprising the pressure-sensitive adhesive layer.