Methylene Malonate Waterproofing Coating for Fast Low-Temperature Curing
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Solution Overview
Problem
Current reactive waterproofing coatings, particularly those based on polyurethane/polyurea, poly(meth)acrylate, and epoxy resin, face issues such as slow curing, strong odors, complexity in application, environmental unfriendliness, and sensitivity to temperature and humidity, making them unsuitable for wide-ranging construction applications.
Innovation Solution
A two-component composition comprising methylene malonate monomer, methylene malonate polymer, and an acidic stabilizer, combined with an alkali accelerator, which can cure quickly at low temperatures and high humidity levels, forming a 100% solid compound with excellent chemical resistance and water absorption properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyurethane/polyurea-based waterproofing coats are used, then good waterproofing performance is achieved, but slow curing and strong odor occur
Solution Approach 1:
The patent changes the chemical composition parameters by replacing polyurethane/polyurea with methylene malonate monomer and polymer systems, which fundamentally alters the curing mechanism to achieve faster curing without compromising waterproofing performance
Solution Approach 2:
The patent extracts and eliminates the harmful isocyanate component from the system, replacing it with methylene malonate chemistry that achieves similar or superior performance without the strong odor and slow curing issues
2Loss of time
If poly(meth)acrylate-based waterproofing coats are used, then fast curing is achieved, but strong odor and sensitivity to radical inhibitor occur
Solution Approach 1:
The patent removes the problematic methyl methacrylate component and replaces it with methylene malonate chemistry, eliminating the strong odor and radical inhibitor sensitivity while maintaining fast curing characteristics
Solution Approach 2:
The patent changes the monomer type from poly(meth)acrylate to methylene malonate, which fundamentally alters the polymerization mechanism to be less sensitive to radical inhibitors like oxygen while maintaining rapid curing
3Reliability
If epoxy resin-based waterproofing coats are used, then good chemical resistance is achieved, but slow curing at low temperature occurs
Solution Approach 1:
The patent changes the chemical system from epoxy resin to methylene malonate monomer and polymer, which enables fast curing even at low temperatures while maintaining excellent chemical resistance through the crosslinked network structure
4Loss of time
If two-component systems are used, then fast curing is achieved, but complicated application and need for accurate proportion occur
Solution Approach 1:
The patent segments the system into two components (Component I with monomer, polymer and acidic stabilizer; Component II with alkali accelerator) that are mixed immediately before application, maintaining fast curing benefits while simplifying storage and application logistics
Solution Approach 2:
The patent introduces an acidic stabilizer as an intermediary component that allows the system to remain stable during storage and only react when mixed with the alkali accelerator, providing a buffer that simplifies the mixing process and extends open time
5Ease of operation
If one-component polyurethane/polyurea systems are used, then easy application is achieved, but slow curing and strong odor occur
Solution Approach 1:
The patent changes the chemistry from one-component polyurethane/polyurea to a two-component methylene malonate system, which enables fast curing while the components are designed for easy mixing and application
6Object-generated harmful factors
If 100% solid compound is formed, then environmental friendliness is achieved, but fast curing at low temperature and high humidity is challenging
Solution Approach 1:
The patent changes the chemical composition to methylene malonate monomer and polymer with specific functional groups that enable the 100% solid compound to cure rapidly even at low temperatures and high humidity through the alkali-acid reaction mechanism
Solution Approach 2:
The patent uses an acidic stabilizer and alkali accelerator as intermediaries that facilitate the curing reaction under challenging environmental conditions, allowing the 100% solid compound to cure fast without VOC emissions
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 fast curing, environmental friendliness, and superior mechanical and chemical performance, making it suitable for diverse construction applications, including irregular surfaces, with improved workability and reduced volatile organic compounds (VOCs).
Implementation Method 1
at least one methylene malonate monomer (A), at least one polymer (B)
Implementation Method 2
component II comprising at least one alkali accelerator
Data Source
AI summary
The invention relates to a composition, more particularly, to a two-component composition comprising component I comprising at least one methylene malonate monomer (A), at least one polymer (B) and at least one acidic stabilizer (C), and component comprising at least one alkali accelerator, to the preparation thereof, and to the use of the composition as a waterproofing coat in construction applications.