Silane-End Capped Adhesive for Moisture Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current water-born adhesives used in the flooring industry are sensitive to elevated concrete moisture and pH, leading to degradation and costly repairs, as they lack alkaline and waterproof properties.
Innovation Solution
A polymeric matrix adhesive composition featuring a silane end-capped polymer component, a urethane component with specific NCO content and functionality, a hydrophobically modified reinforcing extender, and a thixotropic agent, which forms a waterproof, hydrolytically stable, and pH-resistant bond when cured.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water-born adhesive formulations are used, then ease of application and environmental safety are improved, but sensitivity to concrete moisture and pH leading to degradation worsens
Solution Approach 1:
The patent changes the chemical parameters of the adhesive formulation by incorporating silane end-capped polymers and specific urethane components with controlled NCO content (7-23%) and functionality (2.0-2.55). These parameter changes enable the adhesive to achieve both water-born applicability and resistance to moisture/pH degradation through hydrolytic stability and alkaline resistance of the silane-urethane chemistry
Solution Approach 2:
The patent creates a composite adhesive system combining silane end-capped polymer components with urethane components, reinforcing extenders, and thixotropic agents. This composite formulation integrates multiple material functions: the silane-urethane matrix provides waterproofing and pH resistance, while reinforcing extenders enhance mechanical properties and thixotropic agents provide application rheology control
2Reliability
If a moisture barrier coating is applied to combat pH catalyzed moisture degradation, then adhesive protection from alkaline moisture attack is improved, but cost, difficulty, and time consumption worsen
Solution Approach 1:
The patent merges the adhesive formulation with moisture and pH resistance properties by incorporating silane end-capped polymers that provide hydrolytic stability and alkaline resistance directly in the adhesive matrix. This consolidation eliminates the need for separate moisture barrier coatings, reducing application complexity while maintaining protection against alkaline moisture attack
Solution Approach 2:
The silane-urethane adhesive formulation provides self-protection against moisture and pH degradation through its inherent hydrolytic stability and alkaline resistance. The adhesive serves its own protective function without requiring external barrier coatings, thereby simplifying the overall application process
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 adhesive composition provides a durable, waterproof, and pH-resistant bond that withstands elevated moisture and alkalinity, reducing the need for moisture barrier coatings and minimizing repair costs by maintaining adhesion and stability over time.
Implementation Method 1
a cured product of a silane end-capped polymer component comprising a silane and a urethane component
Implementation Method 2
a cured product of a silane end-capped polymer component comprising a silane and a urethane component
Implementation Method 3
the hydrophobic modification of the reinforcing extender and thixotropic agent
Data Source
AI summary
A polymeric matrix adhesive composition and methods of preparing said compositions. A silane is added to a prepolymer urethane to react with the urethane and at least partially end-cap the urethane to produce a silane end-capped polymer component. A reinforcing extender and a thixotropic agent are reacted with the silane end-capped polymer component. The cured product of the polymeric matrix adhesive composition is waterproof, hydrolytically stable, and pH resistant.