Fluorine Boric Acid PVB Composite Adhesion
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Solution Overview
Problem
Fluorine-containing compounds with perfluoroalkyl groups longer than 6 carbon atoms are carcinogenic and lack adhesion to inorganic substrates, while those with shorter chains have insufficient water and oil repellency, and may release perfluorooctanoic acid into the environment.
Innovation Solution
A fluorine-containing boric acid PVB composite is formed using a fluorine-containing alcohol with a perfluoroalkyl group of 6 or less carbon atoms, which is easily degradable and provides excellent adhesion and repellency, avoiding environmental pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-containing compounds with perfluoroalkyl groups longer than 6 carbon atoms are used, then water and oil repellency is improved, but carcinogenicity increases and adhesion to inorganic substrates deteriorates
Solution Approach 1:
The patent changes the carbon chain length parameter of the perfluoroalkyl group from greater than 6 to 6 or less carbon atoms. This parameter modification eliminates carcinogenicity while maintaining sufficient water and oil repellency through the optimized fluorine-containing alcohol structure combined with boric acid and PVB resin system.
2Reliability
If fluorine-containing compounds with perfluoroalkyl groups longer than 6 carbon atoms are used, then water and oil repellency is improved, but adhesion to inorganic substrates deteriorates
Solution Approach 1:
The patent creates a composite material system consisting of fluorine-containing alcohol (with 6 or less carbon atoms), boric acid, and PVB resin. This composite approach compensates for the reduced adhesion of shorter-chain fluorinated compounds by incorporating PVB resin, which provides strong adhesion to inorganic substrates while the fluorine component maintains water and oil repellency.
3Strength
If fluorine-containing alcohols with perfluoroalkyl groups of 6 or less carbon atoms are used, then adhesion to inorganic substrates is improved, but water and oil repellency deteriorates
Solution Approach 1:
The patent merges three components with complementary functions: fluorine-containing alcohol (provides water and oil repellency), boric acid (enhances adhesion and forms crosslinked structure), and PVB resin (provides adhesion to inorganic substrates). The synergistic combination of these components achieves both good adhesion and sufficient water and oil repellency, overcoming the limitations of using fluorine-containing alcohol alone.
4Reliability
If fluorine-containing compounds are used for surface treatment, then water and oil repellency is improved, but environmental pollution increases
Solution Approach 1:
The patent modifies the molecular structure parameter by limiting the perfluoroalkyl group to 6 or less carbon atoms, which prevents the formation of persistent environmental pollutants like perfluorooctanoic acid (PFOA) while maintaining the desired water and oil repellency performance through the composite formulation.
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 composite exhibits superior water and oil repellency with strong adhesion to inorganic substrates, reducing environmental impact and maintaining chemical and thermal stability.
Implementation Method 1
a fluorine-containing boric acid PVB composite comprising a condensate of a fluorine-containing alcohol, boric acid and polyvinyl butyral
Implementation Method 2
when a fluorine-based compound is used for surface treatment, surface modification can be applied for not only water-repellency, but also oil-repellency, due to characteristics of fluorine atoms
Data Source
AI summary
A fluorine-containing boric acid PVB composite comprising a condensate of a fluorine-containing alcohol, boric acid and polyvinyl butyral, wherein the fluorine-containing alcohol is represented by the general formula: Rf(A-OH)k wherein k is 1 or 2; when k is 1, Rf is a perfluoroalkyl group having 6 or less carbon atoms, a polyfluoroalkyl group in which some of the fluorine atom or atoms of the perfluoroalkyl group are replaced by hydrogen atom or atoms, a polyfluoroalkyl group containing a terminal perfluoroalkyl group having 6 or less carbon atoms and a perfluoroalkylene group having 6 or less carbon atoms, or a linear or branched, perfluoroalkyl group containing a terminal perfluoroalkyl group having 6 or less carbon atoms, a perfluoroalkylene group having 6 or less carbon atoms and ether bonds; when k is 2, Rf is a linear or branched, perfluoroalkylene group or polyfluoroalkylene group, containing a perfluoroalkylene group having 6 or less carbon atoms and ether bonds; and A is an alkylene group having 1 to 6 carbon atoms.