Water-Based Fluorine Resin Coating for High Water Repellency
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Solution Overview
Problem
Conventional fluorine resin paints have low water repellency and are often flammable, posing safety and transportation challenges, especially when using non-water-based organic solvents.
Innovation Solution
A water-based fluorine resin paint comprising a fluorine resin powder, binder, fluorine-based oil, titanium dioxide, and film-forming auxiliary agent, with a water contact angle of 140 degrees or more, providing excellent water repellency and weather resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional fluorine resin paints use non-water-based organic solvents, then the paint can be applied and form a coating film, but the paint becomes flammable and is classified as a dangerous substance requiring special transportation procedures
Solution Approach 1:
The patent changes the fundamental parameter of the solvent system from organic-based to water-based. This substitution eliminates flammability while maintaining paint applicability and coating film formation capabilities through careful selection of water-soluble binders and fluorine resin compositions
Solution Approach 2:
The patent converts the potential disadvantage of water-based solvents (which traditionally compromise coating performance) into a benefit by achieving excellent water repellency (contact angle ≥140°) and durability. The water-based formulation becomes advantageous rather than harmful, eliminating flammability risks while maintaining or improving functional performance
2Ease of manufacture
If fluorine resin paints use copolymers of fluoroolefins and hydrocarbons, then the paint can form a coating film, but the water repellency is low with a contact angle of only about 80 degrees
Solution Approach 1:
The patent employs a composite material system combining fluorine resin particles (8-50 μm), water-soluble binders, and specific additives. This composite approach achieves superior water repellency (contact angle ≥140°) and durability that cannot be obtained with conventional copolymer formulations alone
Solution Approach 2:
The patent applies fluorine resin particles with specific properties (particle size 8-50 μm, specific surface area 0.5-5.0 m²/g) to create localized hydrophobic regions on the coating surface. This localized concentration of fluorine components at the surface achieves high water repellency while maintaining overall coating integrity
3Reliability
If fluorine resin coating films are made with conventional formulations, then they can provide initial water repellency, but the contamination resistance decreases over time when exposed to environmental conditions
Solution Approach 1:
The patent creates a coating film where fluorine resin particles are continuously distributed and embedded within the binder matrix, ensuring sustained water repellency and contamination resistance over time. The specific particle size range (8-50 μm) and surface area (0.5-5.0 m²/g) ensure continuous surface coverage that maintains performance during immersion and exposure
Solution Approach 2:
The patent incorporates titanium dioxide with photocatalytic activity into the coating formulation before application. This preliminary inclusion enables the coating to actively decompose organic contaminants upon UV exposure, maintaining contamination resistance over extended periods through self-cleaning action rather than passive resistance
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 paint maintains high water repellency and weather resistance over time, reducing flammability and transportation costs while maintaining antifouling properties through photocatalytic decomposition of adhered dust.
Implementation Method 1
titanium dioxide powder having a photocatalytic effect, decompose dust such as organic substances adhered to the surface into carbon dioxide and water when irradiated with ultraviolet rays
Implementation Method 2
a water contact angle of 140 degrees or more and high water repellency
Implementation Method 3
an water-based solvent containing at least one of water and a water-soluble organic solvent
Data Source
AI summary
There are provided an water-based fluorine resin paint which is an water-based paint and has excellent water repellency and weather resistance, an water-based fluorine resin coating film, and a method of forming an water-based fluorine resin coating film. The water-based fluorine resin paint includes a solute containing a fluorine resin powder, a binder, a fluorine-based oil, titanium dioxide, and a film-forming assistant, and an water-based solvent containing at least one of water and a water-soluble organic solvent.