Coating Composition for Wall Coverings Resolving Curling and Toxicity
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Solution Overview
Problem
Existing wall, floor, and ceiling coverings made with PVC materials face issues such as curling during application, health hazards due to toxic emissions, and adverse indoor climate effects, while alternative polymer coatings often lack sufficient printability and flatness for adhesive techniques.
Innovation Solution
A coating composition comprising 15-80% ethylene vinyl acetate copolymer, 0.1-30% hydrocarbon resin, 0.1-20% wax, 0.1-80% filler, and 0.01-20% carboxamide, which provides improved surface resistance, printability, and flatness without curling, while being free from hazardous emissions and toxic combustion products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PVC coating is used on wall coverings, then wear resistance and ease of maintenance are improved, but health hazards due to toxic emissions and adverse indoor climate effects occur
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by replacing PVC with a specific formulation containing ethylene-vinyl acetate copolymer (15-80 wt%), hydrocarbon resin (0.1-30 wt%), wax (0.1-20 wt%), filler (0.1-80 wt%), and carboxylic acid amide lubricant (0.01-20 wt%). This parameter change eliminates harmful chlorine content while maintaining functional performance through carefully selected alternative materials and their proportions.
Solution Approach 2:
The invention uses a composite material system combining multiple components: ethylene-vinyl acetate copolymer as base polymer, hydrocarbon resin for adhesion and flexibility, wax for surface properties, filler for structural integrity, and carboxylic acid amide for lubrication. This composite approach achieves wear resistance without the toxic effects of PVC by distributing functions across multiple benign materials.
2Object-generated harmful factors
If alternative polymer coatings are used to replace PVC, then health hazards are reduced, but printability and flatness for adhesive techniques are insufficient
Solution Approach 1:
The patent optimizes physical parameters of the coating including flatness, printability, and adhesive compatibility by adjusting the formulation. The ethylene-vinyl acetate copolymer with specific vinyl acetate content (15-80 mol%) provides the right balance of flexibility and flatness, while the hydrocarbon resin enhances adhesive bonding and the wax component improves surface smoothness for printing.
Solution Approach 2:
The coating formulation provides different local properties within the same material system: the ethylene-vinyl acetate copolymer provides base flexibility and flatness, the hydrocarbon resin provides localized adhesion enhancement at the substrate interface, the wax provides surface-level smoothness for printing, and the filler provides structural stability. Each component addresses specific local requirements.
3Shape
If foam textured wallpaper with relief-like surfaces is produced, then aesthetic appearance is improved, but flatness and applicability are worsened
Solution Approach 1:
The patent controls the foam structure parameters including cell size, wall thickness, and density to achieve the desired balance between surface texture and flatness. The ethylene-vinyl acetate copolymer formulation and processing conditions are optimized to create a foam structure that provides aesthetic relief patterns while maintaining overall flatness for proper wall application.
Data Source
AI summary
The present invention relates to a coating composition for producing a coated substrate and in particular for producing a coated wall, floor or ceiling covering.