Perfluoropolyether Polymer Surface Treating Agent for Touch Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current surface treating agents for electronic devices and optical materials fail to provide a balance between good surface slipping property and stain resistance, particularly for touch panel devices which require stricter requirements.
Innovation Solution
A perfluoropolyoxyalkylene group-containing polymer with hydrolysable groups strategically placed along the molecular chain, allowing for a surface treating agent that enhances both slipping and anti-abrasion properties while maintaining water- and oil-repellency and easy stain removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perfluoropolyoxyalkylene group-containing compounds are used for water- and oil-repellency, then stainproof property is improved, but surface slipping property deteriorates
Solution Approach 1:
The patent applies local quality by introducing hydrolysable groups at specific positions (both ends and intermediate positions) of the perfluoropolyether molecular chain. This creates different functional zones: the perfluoropolyether moiety provides water- and oil-repellency, while the hydrolysable groups at strategic positions enable crosslinking to improve surface slipping property without compromising the stainproof property throughout the coating.
2Ease of operation
If hydrolysable groups are added to improve adhesion, then surface slipping property is improved, but curability deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully controlling the number and position of hydrolysable groups (represented by parameters a, b, c where a=2 or 3, b=0-2, c=1-5) to achieve optimal balance between adhesion and curability. The molecular weight of the perfluoropolyether (500-50,000) is also optimized to ensure proper curability while maintaining surface slipping property.
3Reliability
If surface treating agent is applied for stain resistance, then stainproof property is improved, but dynamic friction coefficient increases
Solution Approach 1:
The patent applies composite materials by combining perfluoropolyether moieties (providing low surface free energy and stain resistance) with hydrolysable groups (forming crosslinked networks for improved surface slipping). This composite structure at the molecular level creates a coating that simultaneously achieves low dynamic friction coefficient and high stainproof property.
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 polymer provides a surface with a low dynamic friction coefficient and excellent stain wiping properties, maintaining performance even after abrasion, making it suitable for frequent cleaning and use on devices like touch panels and mobile phones.
Implementation Method 1
a perfluoropolyether having a hydrolysable group on at least one site other than both ends of its molecule chain
Implementation Method 2
perfluoropolyether moiety having a hydrolysable group... have very small surface free energy, and, therefore, have water- and oil-repellency
Data Source
AI summary
The present invention relates to a perfluoropolyoxyalkylene group-containing polymer represented by the following formula (1),wherein Rf is a group having a perfluoropolyoxyalkylene group; W1 is a divalent organosiloxane group having at least one group represented by the following formula (2); W2 is a monovalent group selected from an alkyl group, an alkenyl group, an alkenyloxyalkyl group, an aryl group and an organosiloxane group represented by the following formula (3), and the combinations thereof, the monovalent group having 1 to 300 carbon atoms and being optionally substituted with one or more fluorine atoms; Q is, independently of each other, a divalent linking group having 2 to 12 carbon atoms, optionally containing one or more oxygen atoms, nitrogen atoms, or fluorine atoms; and p is an integer of from 1 to 20,wherein X is a hydrolysable group; R1 is an alkyl group having 1 to 4 carbon atoms or a phenyl group; y is an integer of from 1 to 5; and a is 2 or 3,wherein, R2 and R3 each are, independently of each other, a group selected from an alkyl group and an aryl group, have 1 to 200 carbon atoms and may optionally be substituted with one or more fluorine atoms and; and n is an integer of from 0 to 50.