Colloidal Silica Coating Composition for Soot and Cement Removal
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Solution Overview
Problem
Existing coating compositions are ineffective in easily removing soot and cement stains, despite being suitable for removing scribbles, highlighting a gap in cleanability performance.
Innovation Solution
A composition for coating film formation comprising a water-based resin, such as polyurethane-based resin, and colloidal silica, with an elastic modulus of 100 MPa or more, which forms a coating film with enhanced cleanability for soot and cement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating composition containing liquid organosiloxane, organometal catalyst, and crosslinking agents is used, then solvent resistance and recoatability are improved, but cleanability for soot and cement stains deteriorates
Solution Approach 1:
The patent changes the elastic modulus parameter of the coating film by incorporating colloidal silica particles, which have high modulus values. This parameter change enables the coating film to achieve both the required mechanical properties and enhanced cleanability for soot and cement stains, resolving the contradiction between durability and ease of cleaning.
Solution Approach 2:
The patent creates a composite coating system by combining organic components (liquid organosiloxane, crosslinking agents) with inorganic colloidal silica. This composite structure provides both the chemical resistance and adhesion properties of the organic matrix and the high elastic modulus and cleanability enhancement of the inorganic particles, simultaneously achieving solvent resistance and improved cleanability.
2Ease of operation
If coating film elasticity is increased to improve cleanability, then removal of soot and cement becomes easier, but film strength and durability may deteriorate
Solution Approach 1:
The patent applies local quality enhancement by concentrating colloidal silica particles at the coating film surface or within specific regions. This creates localized areas of high elastic modulus that specifically enhance cleanability for soot and cement removal, while the overall film structure maintains its strength and durability through the continuous organic matrix.
Data Source
AI summary
A composition for coating film formation containing a water-based resin and a colloidal silica. A measurement coating film sample 1 produced by a predetermined method has an elastic modulus of 100 MPa or more. A content of the colloidal silica may be 30 parts by mass or less with respect to 100 parts by mass of the water-based resin.