Water-Based Elastic Coating for Wet-Surface Waterproofing
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Solution Overview
Problem
Existing waterproofing coatings face challenges such as inadequate weatherproof properties, detachment, peeling, and cracking, especially when applied to wet surfaces, and often rely on harmful solvents, limiting their industrial safety and environmental sustainability.
Innovation Solution
A method involving a polymer dispersion with particles of different sizes, where the addition of solids controls film formation by creating a distance between polymer particles, allowing for the formation of a uniform film through secondary bonding, without the use of organic solvents, and utilizing a water-based composition that forms a reinforced cross-linked structure for effective waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional waterproofing coatings are applied to wet surfaces, then application speed increases, but adhesion and weatherproof properties deteriorate
Solution Approach 1:
The invention changes the chemical parameters of the coating composition by incorporating specific polymer emulsions with controlled particle sizes (0.01-0.2 μm and 0.25-1 μm), coagulators, and crosslinking agents that enable the coating to adhere to and cure on wet surfaces, transforming the coating's response to moisture from harmful to beneficial
Solution Approach 2:
The invention creates a composite coating system combining multiple polymer emulsions with different particle sizes, coagulators, fillers, and crosslinking agents that work synergistically to provide both wet-surface adhesion and durable weatherproofing, eliminating the trade-off between application speed and coating reliability
2Reliability
If organic solvents are used in coating formulations, then coating performance and weatherproof properties improve, but environmental safety and industrial hygiene deteriorate
Solution Approach 1:
The invention changes the solvent parameter from organic to water-based, using polymer emulsions dispersed in water as the continuous phase, thereby eliminating toxic organic solvent emissions while maintaining coating performance through careful selection of emulsion composition, particle size distribution, and crosslinking chemistry
Solution Approach 2:
The invention uses water as an intermediary medium to disperse polymer particles, replacing organic solvents entirely. The water-based emulsion system allows polymer particles to remain suspended and stable during application, then coagulates and crosslinks to form the protective coating, eliminating harmful emissions while preserving coating functionality
3Manufacturing precision
If polymer particles are allowed to approach each other closely for film formation, then film uniformity improves, but uncontrolled caking and aggregation occur
Solution Approach 1:
The invention applies local quality by using a bimodal particle size distribution where fine particles (0.01-0.2 μm) fill gaps and provide uniformity at the micro-level, while coarser particles (0.25-1 μm) maintain spacing and prevent caking at the macro-level, allowing film formation without uncontrolled aggregation
Solution Approach 2:
The invention introduces water as an intermediary medium that maintains separation between polymer particles during storage and application. The water-based emulsion system allows particles to remain dispersed and stable, then controlled coagulation and crosslinking bring particles together uniformly to form the film, preventing uncontrolled caking while achieving film uniformity
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 solution ensures excellent adhesion to all surfaces, including wet ones, provides ecological and non-toxic properties, and results in a durable, breathable, and gas-impermeable film with improved weatherproof and chemical resistance, eliminating the need for ventilation during application and reducing health hazards.
Implementation Method 1
a solid and potentially solidifying aggregate forms a three-dimensional structure in the waterproofing film, which structure acts as a physical support structure and onto the surface of which the polymer particles adhere
Implementation Method 2
The liquid phase may be removed either actively (by raising the temperature or otherwise drying) or typically passively, i.e. by allowing the liquid to evaporate
Implementation Method 3
By bringing the components of the polymer composition adequately close to each other, secondary bonds are formed between them, in which case the dispersion forms a film
Data Source
AI summary
The present invention relates to a method of producing an elastic coating which is suitable for waterproofing, by using film forming onto a solid surface, textile or mesh. In this method, a dispersion which comprises i) one or more adhesives and/or coagulating aggregates, mainly in solid form, ii) one or more polymers, and iii) one or more surface- active agents, is brought into contact with a coagulator of the surface-active agent of the dispersion. The present invention also relates to a coating which is prepared by using the present method.