Rapid-Curing Underwater Adhesive Compound Without Heating
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Solution Overview
Problem
Existing underwater adhesives face issues such as low dry adhesive strength, low underwater adhesive strength, long curing times, and the need for heating or solvent application, making them difficult to use effectively in water.
Innovation Solution
A compound represented by specific molecular formulas (1) and (2) that can be rapidly cured in water, offering high underwater adhesive properties, is synthesized by polymerizing ethers with amino and isothiocyanate groups at terminals, allowing for bonding without heating or ultrasonic treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the adhesive from Patent Literature 1 is used, then the adhesive can be used in water or dry state, but the adhesive requires heating or ultrasonic treatment for curing which cannot be performed in water
Solution Approach 1:
The invention changes the chemical parameters of the adhesive system by introducing a water-soluble polymer backbone with specific functional groups (carboxyl, hydroxyl, or amino groups) that enable curing through water-based chemical reactions. This allows the adhesive to cure in water without requiring heating or ultrasonic treatment, resolving the contradiction between water usability and ease of operation.
2Adaptability or versatility
If conventional underwater adhesives are used, then bonding can be performed in water, but the adhesive has low dry adhesive strength
Solution Approach 1:
The invention uses a composite structure consisting of a water-soluble polymer backbone combined with specific functional groups (carboxyl, hydroxyl, or amino groups) that provide both underwater reactivity and strong adhesion to various substrates. This composite material approach enables the adhesive to maintain high strength in both underwater and dry conditions, resolving the contradiction between underwater bonding capability and dry adhesive strength.
3Adaptability or versatility
If conventional underwater adhesives are used, then bonding can be performed in water, but the adhesive has low underwater adhesive strength
Solution Approach 1:
The invention optimizes the chemical parameters by selecting specific functional groups (carboxyl with pKa 2-5, hydroxyl, or amino groups) on the water-soluble polymer backbone that enhance underwater adhesion through favorable interactions with substrate surfaces in aqueous environments. This parameter optimization enables high underwater adhesive strength while maintaining the ability to bond in water.
4Adaptability or versatility
If conventional underwater adhesives are used, then bonding can be performed in water, but it takes a long time to cure the adhesive
Solution Approach 1:
The invention changes the kinetic parameters of the curing process by introducing functional groups (carboxyl, hydroxyl, or amino groups) that react rapidly with each other or with substrates in water. This parameter change accelerates the curing reaction, reducing curing time while maintaining underwater bonding capability.
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 compound achieves rapid curing and high underwater adhesive strength, enabling effective bonding in water without the need for additional heating or solvent application.
Implementation Method 1
A polymer, which is obtained by polymerizing the compound of any one of Items 1 to 5
Implementation Method 2
The compound of the present invention may be used as an underwater adhesive, which can be rapidly cured in water and has a high underwater adhesive property
Data Source
AI summary
Provided is a compound, which is represented by the following formula (1):in the formula (1), A and B satisfy a relationship (I) or (II):(I) one of A or B represents a group represented by the following formula (2); and (II) both of A and B each independently represent a group represented by the following formula (2):and D represents hydrogen or a methyl group.