UV-Curable Silane Coatings with Rapid Room-Temperature Curing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing UV-curing materials require a high proportion of silanes with functional groups like double bonds or epoxides for curing, and fast UV curing at room temperature is not feasible without thermal or ionic starters, which take hours to days.
Innovation Solution
A UV-curable coating material using non-functionalized silanes and silicone resins with 1-10 wt.% cationic or anionic UV initiators for rapid curing within seconds to minutes at room temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-functionalized silanes are used for coating material, then the coating transparency and chemical resistance are improved, but the curing speed at room temperature deteriorates (requiring hours to days with thermal or ionic starters)
Solution Approach 1:
The patent changes the chemical composition parameters by introducing specific cationic UV initiators (sulfonium salts, iodonium salts) and anionic UV initiators (diazonium compounds, ketoprofen derivatives) with precise structural characteristics. These initiators enable non-functionalized silanes to undergo rapid UV-induced sol-gel reaction at room temperature, transforming the curing kinetics from hours/days to seconds/minutes while preserving coating chemical resistance and transparency
Solution Approach 2:
The patent creates a composite coating system combining non-functionalized silanes (for chemical resistance and transparency) with UV initiators (for rapid curing). This composite approach allows the silane network to form quickly under UV irradiation without requiring traditional functional groups, achieving both fast processing and superior coating performance
2Productivity
If functionalized silanes with double bonds or epoxides are used for UV curing, then the curing speed is improved, but the coating transparency and chemical resistance deteriorate
Solution Approach 1:
The patent extracts and eliminates the functional groups (double bonds, epoxides) from the silane structure that traditionally enabled UV curing. By removing these groups, the patent achieves superior coating transparency and chemical resistance. The curing function is then restored through the introduction of specialized UV initiators that activate the sol-gel reaction of non-functionalized silanes without compromising coating quality
Solution Approach 2:
The patent introduces UV initiators as intermediary substances that mediate the curing process. These initiators (cationic sulfonium/iodonium salts or anionic diazonium/ketoprofen compounds) act as catalysts to trigger rapid sol-gel reaction of non-functionalized silanes under UV irradiation, replacing the need for functional groups while maintaining or improving coating performance
3Reliability
If ionic starters are used for curing non-functionalized silanes, then the chemical resistance is improved, but the curing time increases to hours or days
Solution Approach 1:
The patent employs periodic UV irradiation to activate the initiators, creating rapid bursts of sol-gel reaction. The UV light provides periodic energy input that drives the condensation reaction forward quickly, reducing curing time from hours/days to seconds/minutes while the silane network continues to develop chemical resistance through the ongoing sol-gel process
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
Enables fast UV curing of non-functionalized silanes and silicone resins at room temperature, producing transparent or colored coatings with enhanced properties such as adhesion, scratch resistance, and chemical resistance.
Implementation Method 1
UV-curable coating material made from non-functionalized silanes and/or hydrolysates of non-functionalized silanes and/or silicone resins... contains between 1 wt.% and 10 wt.% commercial cationic or anionic UV initiators... enables fast UV curing... at room temperature within one second to 10 minutes
Implementation Method 2
UV-curing sol-gel materials are obtained by hydrolysis and condensation of silanes
Data Source
AI summary
The invention relates to a UV-curable coating material made from non-functionalized silanes and/or hydrolysates of non-functionalized silanes and/or silicone resins and/or silicones containing hydrolyzable alkoxy group residues. The invention also relates to a process for UV-curing coating material. To create a UV-curable coating material made from non-functionalized silanes, mixtures of non-functionalized silanes and hydrolysates of non-functionalized silanes, or mixtures of non-functionalized silanes and silicone resins, the invention proposes that the coating material contain between 1% and 10% by weight of commercial cationic or anionic UV initiators.Surprisingly, it has been found that the coating material can be cured by UV radiation at room temperature within one second to 10 minutes, preferably within 10 seconds to 5 minutes and particularly preferably within 1 minute to 3 minutes.