Reinforcing Coating Composition for Fouling Control Film
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Solution Overview
Problem
Organopolysiloxane-based fouling control coatings are prone to physical damage and loss of antifouling properties due to their material characteristics and the addition of antifouling agents, leading to economic disadvantages such as the need for frequent repair and maintenance.
Innovation Solution
A method involving a reinforcing coating composition with an organopolysiloxane and a pyrithione salt compound, applied in a specific ratio to enhance the durability and impact resistance of fouling control coatings, where the pyrithione salt content is limited to not more than 10 wt% in the reinforcing coating, ensuring it provides reinforcement without compromising the antifouling agent content in the subsequent fouling control coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antifouling agents are added to organopolysiloxane coatings, then antifouling performance is improved, but coating strength and durability deteriorate
Solution Approach 1:
The patent divides the coating system into two separate layers: a base coat containing the antifouling agent (pyrithione salt) and a clear top coat providing mechanical protection. This segmentation allows each layer to specialize in its function without compromising the other, resolving the contradiction between antifouling performance and coating strength
Solution Approach 2:
The patent creates a composite coating system combining organopolysiloxane resin with pyrithione salt compound in the base coat, and overlays it with a protective clear coat. This composite structure integrates the biochemical functionality of the antifouling agent with the mechanical durability of the polysiloxane matrix, achieving both high antifouling performance and coating strength
2Reliability
If organopolysiloxane coating is applied, then fouling control properties are provided, but resistance to external physical damage deteriorates
Solution Approach 1:
The patent segments the coating into a functional base layer and a protective top layer. The base coat contains the fouling control agents while the clear top coat provides resistance to physical damage from impacts, abrasion, and environmental exposure, thus resolving the contradiction between fouling control and physical durability
Solution Approach 2:
The clear top coat acts as an intermediary protective layer between the antifouling base coat and external physical threats. It shields the underlying functional coating from direct exposure to mechanical stress and environmental factors while allowing the antifouling properties to remain effective
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 method significantly improves the impact resistance and stability of fouling control coatings, reducing peeling and chipping, and maintaining effective antifouling performance, thereby reducing the area requiring repair and extending the coating's lifespan.
Implementation Method 1
an organopolysiloxane (AO) having two or more silanol groups or hydrolyzable groups in the molecule
Implementation Method 2
a step of forming a reinforcing coating (O) by applying and curing a reinforcing coating composition
Implementation Method 3
studies directed to the prevention of the attachment of aquatic organisms to objects such as marine vessels and underwater structures often focus on fouling control coatings which combine an antifouling agent having bioactivity toward marine organisms
Data Source
AI summary
A method for reinforcing a fouling control coating of the invention comprises a step of forming a reinforcing coating (O) by applying and curing a reinforcing coating composition [o], and a step of providing a fouling control coating (X) formed by applying and curing a fouling control coating composition [x], onto the reinforcing coating (O), the reinforcing coating composition [o] comprising an organopolysiloxane (AO) having two or more silanol groups or hydrolyzable groups in the molecule, and a pyrithione salt compound (BO), the fouling control coating composition [x] comprising an organopolysiloxane (AX) having two or more silanol groups or hydrolyzable groups in the molecule, and an antifouling agent (BX), the reinforcing coating (O) giving reinforcement to the coating (X) adhering thereto. According to the present invention, high impact resistance can be imparted to fouling control coatings. As a result, the peeling, chipping and loss of the coatings by external physical damages which are often encountered in the conventional coatings can be remedied, and stable antifouling performance can be obtained.