Silicon Resin Coating Composition for Ship Antifouling
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Solution Overview
Problem
Conventional antifouling coating compositions for ships and in-water structures face challenges in achieving low friction performance, storage stability, and anti-sagging properties, which are essential for reducing fuel consumption and preventing organism adhesion.
Innovation Solution
A coating composition incorporating a silicon atom-containing resin with specific silicon atom-containing groups and an anti-sagging agent, where the anti-sagging agent content is between 0.7 and 3.6 parts by mass per 100 parts of the resin, enhancing both storage stability and low friction performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antifouling coating compositions are used, then organism adhesion is prevented, but low friction performance and storage stability are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by incorporating specific silicon atom-containing resin structures (formulas I-IV) and optimizing the anti-sagging agent content ratio, thereby achieving both low friction performance and maintained antifouling reliability without increasing fuel consumption
Solution Approach 2:
The patent creates a composite coating system combining silicon atom-containing resin with specific anti-sagging agents and optional thermoplastic resins/plasticizers, where the synergistic interaction between components achieves multiple functions: antifouling protection, low friction surface, and storage stability simultaneously
2Use of energy by moving object
If frictional resistance with liquid is reduced, then fuel consumption decreases, but storage stability and anti-sagging properties deteriorate
Solution Approach 1:
The patent optimizes the molecular weight range of the silicon atom-containing resin (400-2500) and precisely controls the anti-sagging agent content (0.7-3.6 parts by mass per 100 parts resin), creating a parameter optimization window where both low friction performance and storage stability are simultaneously achieved
3Stability of the object's composition
If anti-sagging agent content is increased, then anti-sagging property improves, but storage stability may be compromised
Solution Approach 1:
The patent establishes an optimal concentration range for the anti-sagging agent (0.7-3.6 parts by mass per 100 parts silicon atom-containing resin), where the lower bound ensures adequate anti-sagging performance while the upper bound prevents storage stability deterioration, achieving a balanced parameter optimization
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 a coating film with excellent low friction performance, storage stability, and anti-sagging properties, effectively preventing organism adhesion and reducing fuel consumption, while maintaining a high gloss for improved appearance and antifouling properties.
Implementation Method 1
a coating film excellent in low friction performance can be formed... reducing frictional resistance with the liquid by the coating film is desired
Implementation Method 2
an anti-sagging agent... a coating composition... excellent in storage stability and an anti-sagging property
Data Source
AI summary
Provided are a coating composition containing a silicon atom-containing resin and an anti-sagging agent, a coating film formed from the same, an in-water structure and a ship including the coating film. In the coating composition, the silicon atom-containing resin includes a constituent unit (A) derived from a monomer (a) having at least one kind of silicon atom-containing group selected from the group consisting of a group represented by the following formula (I), a group represented by the following formula (II), a group represented by the following formula (III), and a group represented by the following formula (IV), the monomer (a) has a molecular weight of greater than or equal to 400 and less than or equal to 2500, and the content of the anti-sagging agent is greater than or equal to 0.7 parts by mass and less than or equal to 3.6 parts by mass with respect to 100 parts by mass of the silicon atom-containing resin.