Crosslinked Polymer Composition for Wet Room Moisture Barrier
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Solution Overview
Problem
Current water-resistant membrane systems for wet rooms face challenges in maintaining water tightness, vapor resistance, flexibility, and adhesion, leading to potential moisture penetration and structural issues, which can result in costly repairs and health hazards.
Innovation Solution
A crosslinked polymer composition is developed, combining a polymer functionalized with silane and a filler coated with silane, using styrene-butadiene copolymers and epoxysilanes, which forms a water-resistant film with enhanced properties such as water tightness, tensile strength, and elongation, when applied as a moisture barrier in wet rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymer coating is applied to provide water resistance, then water tightness is improved, but flexibility and adhesion may deteriorate
Solution Approach 1:
The patent employs a composite polymer composition combining multiple polymer types (polyurethane, acrylic, vinyl acetate-ethylene copolymer) with specific filler materials and silane crosslinking agents. This composite approach creates a coating that simultaneously achieves water tightness while maintaining flexibility and adhesion through synergistic material interactions.
Solution Approach 2:
The patent modifies the chemical parameters of the polymer coating by incorporating silane crosslinking agents that form three-dimensional crosslinked networks. This crosslinking changes the molecular structure parameters, enabling the coating to achieve both water resistance and mechanical flexibility through controlled chemical bonding density and network architecture.
2Reliability
If polymer dispersion is used for moisture barrier, then water resistance is improved, but adhesion to underlaying material and tile fastening products may worsen
Solution Approach 1:
The patent introduces silane crosslinking agents as intermediary substances that form chemical bridges between the polymer coating and the substrate (underlaying material or tile fastening products). These silane intermediaries provide both water resistance and strong adhesion by creating covalent bonds with both the polymer matrix and the substrate surface.
Solution Approach 2:
The patent changes the surface chemistry parameters of the coating by incorporating functional groups (carboxylic acid, hydroxyl, amino) that enhance chemical affinity to substrates. This parameter modification improves adhesion strength while maintaining water resistance through controlled chemical composition.
3Reliability
If commercial polymer coating systems are used, then water barrier function is achieved, but application complexity increases due to multiple primers and accessories
Solution Approach 1:
The patent develops a universal polymer composition that performs multiple functions simultaneously: it provides water resistance, ensures adhesion to various substrates (including tiles and underlaying materials), and maintains flexibility. This multi-functional coating eliminates the need for separate primers and accessory treatments, simplifying the application system.
Solution Approach 2:
The patent combines multiple previously separate components (polymer binder, filler, crosslinking agent, adhesion promoters) into a single integrated composition formulation. This merging of functions into one applicably reduces system complexity while maintaining all necessary performance characteristics.
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 demonstrates improved water resistance, reduced water absorption, and increased tensile strength, effectively preventing moisture penetration and ensuring structural integrity in wet room applications.
Implementation Method 1
The polymer composition is a dispersion capable of forming a water resistant film upon drying (or curing), based on polymer, a silane crosslinking agent and a filler coated with a silane crosslinking agent
Implementation Method 2
The polymer composition is a dispersion capable of forming a water resistant film upon drying (or curing)
Data Source
Figure 1~2
AI summary
The invention relates to a crosslinked polymer composition having a coated filler. The composition is suited for preparing water resistant membranes for e.g. wet rooms.