Short-Chain Fluorocopolymer Composition for Wash-Durable Stain Proofing
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Solution Overview
Problem
Fluorine type antifouling agents with short chain perfluoroalkyl groups face challenges in maintaining antifouling properties, water/oil repellency, and durability against washing, as the performance tends to be low due to the shortening of the perfluoroalkyl chain.
Innovation Solution
A fluorocopolymer composition comprising specific monomers, including a perfluoroalkyl group, polyethylene oxide, and tetramethylene oxide units, is developed to enhance antifouling properties and durability, with a balanced ratio of polymerized units to achieve excellent water/oil repellency and washing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a short chain perfluoroalkyl group is used in a fluorine type antifouling agent, then environmental impact is reduced, but antifouling property and water/oil repellency decrease
Solution Approach 1:
The invention uses a copolymer composition containing multiple types of monomer units (perfluoroalkyl acrylate/methacrylate units, polyethylene oxide units, and polypropylene oxide units) to create a composite material that combines the environmental benefits of short chain perfluoroalkyl groups with the functional performance of oxyalkylene chains, achieving both reduced environmental impact and maintained antifouling property
Solution Approach 2:
The invention assigns different functional roles to different monomer units within the copolymer: perfluoroalkyl units provide environmental compatibility and basic repellency, while polyethylene oxide and polypropylene oxide units provide enhanced water/oil repellency and antifouling performance through their specific chain structures and lengths
2Object-affected harmful factors
If a short chain perfluoroalkyl group is used, then environmental impact is reduced, but durability against washing deteriorates
Solution Approach 1:
The copolymer combines perfluoroalkyl units with polyethylene oxide and polypropylene oxide units to create a composite structure where the oxyalkylene chains provide enhanced durability against washing through their adhesion and film-forming properties, compensating for the reduced chain length of the perfluoroalkyl groups
Solution Approach 2:
The invention changes the structural parameters of the copolymer by controlling the content ranges of different monomer units (perfluoroalkyl units: 30-65 mass%, polyethylene oxide units: 1-67 mass%, polypropylene oxide units: 3-34 mass%) and the chain lengths of oxyalkylene groups to optimize both environmental compatibility and washing durability
3Object-affected harmful factors
If the perfluoroalkyl chain is shortened, then environmental impact is reduced, but water/oil repellency decreases
Solution Approach 1:
The invention assigns specific functional roles to different monomer units: perfluoroalkyl units provide environmental compatibility, while polyethylene oxide and polypropylene oxide units with specific chain lengths (20-65 mass% and 2-13 mass% respectively) provide enhanced water/oil repellency through their hydrophobic and lipophobic properties
Solution Approach 2:
The copolymer creates a composite structure where the combination of perfluoroalkyl groups with polyethylene oxide and polypropylene oxide chains produces synergistic effects, maintaining superior water/oil repellency even with shortened perfluoroalkyl chains due to the complementary properties of the different monomer units
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 provides a fluorocopolymer with improved antifouling properties and water/oil repellency while maintaining good durability against repeated washing, even with shorter perfluoroalkyl chains, by incorporating specific alkylene oxide chains for enhanced adhesion and film-forming properties.
Implementation Method 1
a fluorine type antifouling composition which is excellent in the antifouling property and water/oil repellency
Implementation Method 2
water/oil repellency
Implementation Method 3
incorporating specific alkylene oxide chains for enhanced adhesion and film-forming properties
Data Source
AI summary
To provide an antifouling composition which is a fluorine-type antifouling composition using a short chain perfluoroalkyl group and which is excellent in antifouling properties and water/oil repellency and presents good durability against washing. An antifouling composition comprising a fluorocopolymer which comprises from 30 to 65 mass% of polymerized units (a) having a C1-6 perfluoroalkyl group, from 1 to 67 mass% of polymerized units (b1) having -(C2H4O)- and from 3 to 34 mass% of polymerized units (b2) having -(C4H8O)-, wherein the content of -(C2H4O)- is from 20 to 65 mass%, and the content of -(C4H8O)- is from 2 to 13 mass%.