Asphalt Curable Composition with Reactive Silicon Polymer
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Solution Overview
Problem
Existing asphalt-based construction methods face issues such as smoke and odor generation, solvent volatilization, brittleness at low temperatures, and inadequate adhesion and water resistance, limiting their application in residential and urban areas, and requiring heat which poses safety risks.
Innovation Solution
A curable composition incorporating a reactive silicon group-containing polyoxyalkylene polymer with natural or petroleum asphalt, which allows for ambient-temperature curing without smoke or odor, improving water resistance and adhesion to mortar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If asphalt is melted using heat method, then waterproof reliability is improved, but smoke and odor are heavily generated polluting the environment
Solution Approach 1:
The invention changes the curing temperature parameter from high temperature (heat method) to ambient temperature (cold construction method), eliminating smoke and odor generation while maintaining waterproof reliability through the reactive silicon group-containing polyoxyalkylene polymer
Solution Approach 2:
The invention uses a composite material system combining asphalt with reactive silicon group-containing polyoxyalkylene polymer, which enables ambient-temperature curing while achieving excellent waterproof performance, adhesion, and elasticity without the harmful emissions of traditional heat methods
2Strength
If rubber modifier is added to improve elasticity, then low-temperature cracking is reduced, but compatibility with asphalt is poor requiring long-time stirring
Solution Approach 1:
The invention changes the molecular structure parameter of the polymer additive by introducing reactive silicon groups into the polyoxyalkylene backbone, which fundamentally improves compatibility with asphalt and enables rapid mixing without prolonged high-temperature stirring
Solution Approach 2:
The invention replaces the mechanical mixing process (long-time high-temperature stirring) with a chemically-compatible system where the reactive silicon group-containing polyoxyalkylene polymer naturally disperses in asphalt, significantly reducing mixing time and energy consumption
3Strength
If epoxy resin is added to impart strength, then summer deformation is reduced, but winter cracking is not solved
Solution Approach 1:
The invention creates a composite material system where reactive silicon group-containing polyoxyalkylene polymer combines both strength enhancement and elasticity, achieving temperature-adaptive performance that prevents both summer deformation and winter cracking, unlike epoxy resin which only provides strength
Solution Approach 2:
The reactive silicon group-containing polyoxyalkylene polymer serves multiple functions simultaneously: it provides strength, elasticity, adhesion, and temperature adaptability, making it a universal additive that solves multiple performance issues in a single component
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 provides excellent water resistance, curability at room temperature, and storage stability, eliminating the need for heat and reducing environmental pollution, while enhancing adhesion and durability of asphalt-based materials.
Implementation Method 1
a polyoxyalkylene polymer having one or more reactive silicon groups represented by the following general formula (1): —Si(R13−a)Xa (1) wherein... X represents a hydroxy group or a hydrolyzable group
Implementation Method 2
a curable composition including (A) a natural asphalt and/or petroleum asphalt, and (B) a polyoxyalkylene polymer having one or more reactive silicon groups
Data Source
AI summary
It is the subject of the present invention to provide a solvent-free ambient-temperature curable composition, excellent in water-resistant adhesion, storage stability and curability, and generates neither smoke nor odor when working therewith. The relevant problem is solved by a curable composition including (A) a natural asphalt and/or petroleum asphalt, (B) a polyoxyalkylene polymer having one or more reactive silicon groups capable of cross-linking by forming siloxane bonds through silanol condensation reaction.