Curable Coating Composition for Acrylic Adhesion and Crack Resistance
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Solution Overview
Problem
Conventional antifouling coating agents face issues with poor adhesion to substrates like (meth)acrylic resin, generation of cracks in thickened coating films, and poor friction resistance.
Innovation Solution
A curable coating agent composition comprising a silicone oligomer with hydrolyzable functional groups, a condensation reaction catalyst, and silane compounds with primary and secondary amino groups, which improves adhesion, film appearance, and friction resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a silicone-based coating composition is used for antifouling, then the coating provides long-term outdoor durability, but adhesion to substrates such as (meth)acrylic resin deteriorates
Solution Approach 1:
The patent uses a composite coating system combining fluororesin and organopolysiloxane components. The fluororesin provides antifouling and durability, while the organopolysiloxane component enhances adhesion to substrates. This composite approach allows both durability and adhesion requirements to be satisfied simultaneously without compromising either property.
2Volume of moving object
If the coating film is thickened to improve coverage, then better protection is achieved, but cracks are generated in the cured coating film
Solution Approach 1:
The patent modifies the chemical composition parameters of the coating, specifically incorporating organopolysiloxane with controlled molecular weight and structure. This changes the curing characteristics and flexibility of the film, allowing thick coatings to cure without generating internal stresses that would cause cracking. The modified composition maintains film integrity even at increased thickness.
3Object-affected harmful factors
If conventional antifouling coating is applied, then antifouling performance is achieved, but friction resistance of the cured coating film deteriorates
Solution Approach 1:
The patent creates different local properties within the coating system. The fluororesin component provides the antifouling surface quality with low friction, while the organopolysiloxane component provides structural integrity and wear resistance. This local differentiation allows the surface to resist fouling while maintaining overall friction resistance and durability.
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 achieves excellent adhesion to substrates, maintains film integrity without cracking, and enhances friction resistance, making it suitable for thick coatings.
Implementation Method 1
a silane compound (c1) having a primary amino group and a hydrolyzable functional group and a silane compound (c2) having a secondary amino group and a hydrolyzable functional group
Implementation Method 2
a condensation reaction catalyst (B)
Implementation Method 3
a silane compound (c1) having a primary amino group and a silane compound (c2) having a secondary amino group
Data Source
AI summary
An object of the present invention is to provide a curable coating agent composition excellent in adhesion to a substrate such as a (meth)acrylic resin, appearance of a thick coating film, and friction resistance of a cured coating film. A curable coating agent composition including a silicone oligomer (A) having a hydrolyzable functional group, a condensation reaction catalyst (B), a silane compound (C), and an organic solvent (D), in which the component (C) contains at least one or more of a silane compound (c1) having a primary amino group and a hydrolyzable functional group and at least one or more of a silane compound (c2) having a secondary amino group and a hydrolyzable functional group.