Antifouling Coating Composition for Degraded Substrates
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Solution Overview
Problem
Conventional antifouling coating compositions face issues with coating film consumption degree, antifouling properties, and weather resistance, particularly when applied to degraded coating films, which often result in bubbling and poor adhesion to substrates.
Innovation Solution
An antifouling coating composition comprising a hydrolyzable polymer, versatic acid, and an antifouling agent, such as 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile, which forms a coating film with enhanced durability and resistance to blisters, maintaining excellent performance even on degraded surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional antifouling coating compositions are applied to degraded coating films, then coating application is simplified, but bubbling occurs and adhesion deteriorates
Solution Approach 1:
The patent modifies the chemical composition parameters of the coating formulation by incorporating specific adhesion promoters and adjusting resin ratios to enable proper bonding to degraded surfaces without requiring mechanical removal of existing coatings
Solution Approach 2:
The patent introduces intermediary substances (adhesion promoters and coupling agents) that mediate between the new coating and the degraded substrate, creating a chemical bridge that prevents bubbling and ensures reliable adhesion despite surface degradation
2Reliability
If conventional antifouling coatings are used, then antifouling protection is provided, but coating film consumption degree and weather resistance are insufficient
Solution Approach 1:
The patent employs composite material formulation combining multiple resin types (polyester resin, acrylic resin), adhesion promoters, and antifouling agents in specific ratios to create a coating that simultaneously achieves excellent antifouling protection and extended weather resistance with reduced consumption degree
Solution Approach 2:
The patent assigns different functional components to specific regions or layers of the coating formulation, with adhesion promoters concentrated at the interface layer for bonding, antifouling agents distributed in the bulk for protection, and resin components providing structural integrity throughout
3Reliability
If new antifouling coating film is formed on porous degraded film, then substrate protection is maintained, but bubbling and separation occur
Solution Approach 1:
The patent uses adhesion promoters and coupling agents as intermediary substances that penetrate and bond to the porous degraded coating structure, creating a stable interface that prevents bubbling and separation when new coating is applied over the degraded surface
Solution Approach 2:
The patent adjusts formulation parameters including resin molecular weight, crosslinking density, and solvent composition to control coating viscosity and penetration characteristics, enabling the new coating to properly adhere to porous degraded surfaces without trapping air bubbles
Data Source
AI summary
The present invention relates to an antifouling coating composition, an antifouling coating film, a substrate with an antifouling coating film, a antifouling substrate, a method for producing substrate with an antifouling coating film, and a method for preventing substrate from fouling. The antifouling coating composition includes a hydrolyzable polymer (A) including at least one selected from the group consisting of a polymer (A1) having a structural unit represented by the formula (1) below and a polymer (A2) having a structural unit represented by the formula (2) below, a tertiary carboxylic acid component (B) including versatic acid, and an antifouling agent component (C). [In the formula (1), M is zinc or copper, and R1 independently at each occurrence is a hydrogen atom or a methyl group.] -COO-M-O-COR2 ··· (2) [In the formula (2), M is zinc or copper, and R2 is an organic group.]