Fluoropolyether Curable Coating for Antifouling Without Coating Defects
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Solution Overview
Problem
Existing curable resin compositions face issues with solubility and uniformity when increasing fluorine content for improved antifouling and slipping properties, leading to coating faults and reduced performance.
Innovation Solution
A curable fluorinated composition comprising a linear polymer with a fluoropolyether backbone, a fluoropolyether backbone, and a non-fluorinated acrylic compound, with specific ratios and structures to enhance solubility and surface properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine content is increased using a fluorinated acrylic compound of single structure, then antifouling and slipping properties are improved, but solubility in non-fluorinated components lowers causing coating faults
Solution Approach 1:
The fluorinated acrylic compound is segmented into two distinct components: Component (A) with a fluoropolyether backbone providing antifouling and slipping properties, and Component (B) a non-fluorinated acrylic compound providing solubility and coating uniformity. This segmentation allows each component to fulfill its specific function without compromising the other, resolving the contradiction between achieving high fluorine content for performance and maintaining solubility for coating quality.
Solution Approach 2:
The invention creates a composite material system by combining Component (A) fluorinated acrylic compound and Component (B) non-fluorinated acrylic compound in specific weight ratios (0.05-50 parts by weight per 100 parts by weight of Component (C)). This composite approach enables the formulation to simultaneously achieve the solubility benefits of non-fluorinated compounds and the surface performance benefits of fluorinated compounds, effectively resolving the technical contradiction.
2Reliability
If fluorine content is increased to improve water repellency and abrasion resistance, then slipping properties are enhanced, but local coating faults such as deficits or orange-peel develop
Solution Approach 1:
The formulation segments fluorinated and non-fluorinated functions into separate components with defined ratios. Component (A) provides the fluorinated functionality for water repellency and abrasion resistance, while Component (B) ensures uniform coating application by maintaining solubility. This segmentation prevents the coating faults that would otherwise result from attempting to achieve high fluorine content in a single-structure compound.
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 cured film with stable solubility and improved antifouling, stain wipe-off, and slipping properties, avoiding coating defects.
Implementation Method 1
when the fluorine content is increased using a fluorinated acrylic compound of single structure, the solubility in other components of the non-fluorinated hard coat agent lowers. As a result, local coating faults due to non-uniform portions such as deficits or overall coating faults such as orange-peel develop on the coating surface.
Implementation Method 2
One of the means for meeting these demands is to cause a highly fluorine-modified component to segregate on the surface.
Implementation Method 3
actinic energy ray-curable compositions such as UV or EB-curable resins are often used
Data Source
AI summary
A fluorine-containing curable composition which contains, as essential components, component (A) that is composed of a compound which is a linear polymer having a fluoropolyether in the main chain, while having a trifluoromethyl group at one end of the molecular chain and two or more (meth)acryl groups at the other end, component (B) that is composed of a compound which is a linear polymer having a fluoropolyether in the main chain, while having two or more (meth)acryl groups at each end of the molecular chain, and which has four to ten (meth)acryl groups in each molecule on average, and component (C) that is composed of a non-fluorinated acrylic compound which contains no fluoropolyether structure, while having two or more (meth)acryl groups in each molecule on average; the total blending amount of component (A) and component (B) relative to 100 parts by mass of component (C) is from 0.05 to 50 parts by mass; and the blending amount of component (A) relative to 100 parts by mass of component (B) is 1 to 100 parts by mass. This fluorine-containing curable composition is capable of forming a cured film that exhibits excellent antifouling properties and excellent water repellency, while having a low coefficient of kinetic friction.