Antifouling Coating Composition Using Silyl Ester Polymer
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Solution Overview
Problem
Waterborne antifouling coating materials with hydrolyzable resins face challenges in achieving both crack resistance and long-term antifouling properties due to the inhibition of hydrolysis when non-hydrolyzable resins are added, leading to compromised self-polishing properties.
Innovation Solution
A waterborne antifouling coating composition comprising a silyl ester polymer, at least one rosin compound, a poly(vinyl alcohol) resin, and water, which balances crack resistance and long-term antifouling properties by maintaining self-polishing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a non-hydrolyzable resin is added to improve crack resistance, then crack resistance is improved, but hydrolysis of the hydrolyzable resin is inhibited and self-polishing properties deteriorate
Solution Approach 1:
The invention changes the chemical structure parameters of the resin by using silyl ester groups instead of conventional hydrolyzable resin structures. This parameter change allows the resin to maintain both crack resistance and self-polishing properties by controlling the hydrolysis rate through the specific silyl ester structure rather than relying on conventional hydrolyzable resin mechanisms.
Solution Approach 2:
The invention creates a composite resin system combining silyl ester polymer with poly(vinyl alcohol) resin and rosin compounds. This composite material approach allows the silyl ester component to provide crack resistance while the combination maintains controlled hydrolysis for self-polishing properties, resolving the contradiction between strength and reliability.
2Object-affected harmful factors
If waterborne resin is used to reduce VOCs, then environmental performance is improved, but the coating film cracks easily when immersed in water
Solution Approach 1:
The invention changes the chemical composition parameters by using silyl ester groups which provide water resistance while maintaining the waterborne nature of the coating. This parameter change allows the coating to be water-based (reducing VOCs) while the silyl ester structure provides the necessary water resistance to prevent cracking.
Solution Approach 2:
The silyl ester polymer acts as an intermediary between the waterborne resin system and water resistance requirements. It mediates the contradiction by providing a structure that is compatible with waterborne application but resists water penetration and cracking through its specific chemical structure.
3Reliability
If hydrolyzable resin is used to achieve self-polishing properties, then long-term antifouling properties are improved, but the coating film lacks crack resistance
Solution Approach 1:
The invention changes the resin structure parameters by introducing silyl ester groups that provide both the hydrolysis capability for self-polishing and the structural integrity for crack resistance. This dual-function parameter change resolves the contradiction between reliability and strength.
Solution Approach 2:
The invention uses a composite resin system where silyl ester polymer combines with poly(vinyl alcohol) resin and rosin compounds to create a material that simultaneously provides crack resistance and controlled hydrolysis for long-term antifouling properties.
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 forms an antifouling coating film with excellent crack resistance and sustained antifouling performance, preventing aquatic organism adhesion and reducing fuel consumption for ships.
Implementation Method 1
a silyl ester polymer, at least one rosin compound selected from rosin and rosin derivatives, a poly(vinyl alcohol) resin, and water
Data Source
AI summary
An antifouling coating composition contains a silyl ester polymer, at least one rosin compound selected from rosin and rosin derivatives, a poly(vinyl alcohol) resin, and water. A method for producing an antifouling substrate, includes subjecting a substrate to application of or impregnation with the antifouling coating composition to provide an applied body or an impregnated body, and drying the applied body or the impregnated body.