Fatty-acid Modified Epoxy Acrylate Optical Fiber Coatings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radiation curable coatings for optical fibers lack high temperature resistance, making them unsuitable for extended use in environments above 100°C, which limits their application in harsh high-temperature settings.
Innovation Solution
A radiation curable coating composition comprising fatty-acid modified epoxy acrylate oligomers, ethylenic unsaturated reactive diluents, and photoinitiators, without urethane chemistry, which provides thermal degradation resistance with less than 10% weight loss after exposure to 180°C for 100 hours, and optionally includes stabilizing and adhesion promoting additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If radiation curable coatings are used on optical fibers, then short hardening time and good adhesion are achieved, but high temperature resistance is poor above 100°C
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by using specific photopolymerizable compounds (epoxy acrylates, polyester acrylates, polyether acrylates) with carefully selected molecular structures that contain no urethane groups. This parameter change enables the coating to withstand temperatures of 100°C or higher while maintaining the radiation curable properties for fast hardening.
Solution Approach 2:
The patent creates a composite coating system by combining multiple photopolymerizable compounds (epoxy acrylate, polyester acrylate, polyether acrylate) in specific weight ratios (each 1-50% by weight). This composite approach synergistically improves both the fast curing characteristic and the high temperature resistance, achieving less than 10% weight loss after 100 hours at 180°C.
2Productivity
If conventional UV curable coatings are used, then fast curing is achieved, but thermal degradation occurs at elevated temperatures
Solution Approach 1:
The patent modifies the chemical structure parameters of the photopolymerizable compounds by selecting specific types (epoxy acrylates, polyester acrylates, polyether acrylates) and excluding urethane chemistry. This parameter change allows the coating to maintain both fast UV curing speed and high thermal stability with less than 10% weight loss after 100 hours at 180°C.
Solution Approach 2:
The patent converts the potential harm of UV radiation (which can sometimes compromise thermal stability) into a benefit by using photopolymerizable compounds that cure rapidly under UV while inherently resisting thermal degradation. The specific chemical composition chosen absorbs UV energy for fast curing but resists thermal breakdown at elevated temperatures.
3Temperature
If hermetic carbon coatings are used for high temperature resistance, then thermal stability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the composition parameters from complex multi-component systems (like carbon coatings requiring multiple layers and specialized materials) to a simplified three-component photopolymerizable system. This achieves comparable or superior thermal stability (less than 10% weight loss at 180°C for 100 hours) with significantly reduced manufacturing complexity.
Solution Approach 2:
The patent extracts the essential thermal resistance function from complex hermetic carbon coating systems and achieves it through a simplified photopolymerizable composition. By taking out only the necessary functional components (photopolymerizable compounds with specific chemical groups) and eliminating unnecessary complexity, the patent achieves high temperature resistance with simpler manufacturing.
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 coating composition achieves exceptional heat resistance, allowing optical fibers to maintain viability as communications media at elevated temperatures, with enhanced thermal stability and resistance to weight loss, even at 200°C.
Implementation Method 1
radiation curable coating composition... one or more photoinitiators
Implementation Method 2
resistance to thermal degradation as measured by less than 10% weight loss after exposure of cured specimens in a natural convection furnace for 100 hours at 180°C
Data Source
AI summary
A Radiation Curable Coating composition, which may be used as an inner primary coating, an outer primary coating, single coats, a matrix, or a buffer resin composition, comprising: A Radiation Curable Coating composition, which may be used as an inner primary coating, an outer primary coating, single coats, a matrix,- or a buffer resin composition, comprising at least one radiation-curable oligomer wherein said at least one radiation curable oligomer is a fatty-acid modified epoxy acrylate; at least one ethylenenic unsaturated reactive diluent; wherein said oligomer(s) and diluent(s) are selected from the group that does not include moieties with Urethane chemistry. This composition, when tested, is found to have resistance to thermal degradation as measured by less than 10% weight loss after exposure of cured specimens in a natural convection furnace for 100 hours at 180°C.