Cure-Indicating Dye-Bound Filler for Curable Resins
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Solution Overview
Problem
Current methods for determining the extent of cure in curable systems require equipment and skilled interpretation, often disrupting manufacturing processes and are not suitable for real-time monitoring, as they rely on sampling and analysis techniques.
Innovation Solution
A dye compound is bonded to filler particles, which are then incorporated into a curable composition, allowing for a visual indication of cure through color change without equipment or extensive interpretation, as the dye remains colorless upon curing, ensuring it does not migrate from the cured system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sampling and analysis methods are used to determine extent of cure, then measurement precision is improved, but device complexity and loss of time increase
Solution Approach 1:
The patent employs a dye that undergoes color change (disappearance) upon curing to provide visual indication of the extent of cure. This eliminates the need for complex analytical equipment while maintaining measurement capability through human-observable color changes, directly resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent replaces mechanical/chemical analysis methods (spectroscopy, chromatography, rheological measurements) with an optical indicator system based on color change. This substitution eliminates the need for sophisticated analytical equipment while providing sufficient information about cure extent through visual observation
2Measurement precision
If sampling and analysis methods are used to determine extent of cure, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent replaces time-consuming sampling and laboratory analysis procedures with an immediate visual color change indicator that provides real-time feedback on cure extent. This allows continuous monitoring without removing samples or interrupting the manufacturing process, resolving the time loss contradiction
Solution Approach 2:
The curing system itself provides the measurement function through the dye's color change property. The system self-monitors its own cure state without requiring external analytical equipment or manual sampling, enabling continuous operation without time loss
3Ease of operation
If dye is included in curative or catalyst composition, then ease of operation is improved, but reliability worsens due to dye blooming or leaching
Solution Approach 1:
The patent combines the dye with filler particles to create a composite indicator system. This merging prevents the dye from blooming or leaching while maintaining its color change function, as the filler acts as a carrier that anchors the dye in place within the curable composition
Solution Approach 2:
The patent creates a composite material consisting of dye-bound filler particles incorporated into the curable composition. This composite structure provides both the visual indication function and the stability required to prevent dye migration, resolving the contradiction between ease of operation and reliability
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 real-time monitoring of the curing process with a visual indication of cure, eliminating the need for equipment and skilled interpretation, and preventing dye migration from the cured system, thus improving process efficiency and accuracy.
Implementation Method 1
The filler can then be incorporated, for example, into a composition that cures by free-radical initiated addition polymerization
Implementation Method 2
Peroxide and dye formulations in which the color disappears when the peroxide is used to generate radicals during the cure of a curable resin
Data Source
AI summary
A compound represented by formula:and a treated filler having the compound on at least a portion of its surface. R is hydrogen or alkyl. X is alkylene, arylalkylene, or alkylarylene, each optionally interrupted by at least one of an ether, thioether, amine, amide, ester, thioester, carbonate, thiocarbonate, carbamate, thiocarbamate, urea, or thiourea, with alkylene optionally interrupted by arylene. W is hydroxyl, a sulfonic acid group, a phosphonic acid group, carboxylic acid group, —NHR1, epoxy, or —Si(Y)x(Z)3-x. Y is alkyl, aryl, arylalkylenyl, or alkylarylenyl. Z is halide, hydroxyl, alkoxy, aryloxy, acyloxy, polyalkyleneoxy, —O— covalently bonded to the surface of the filler, or —O bonded to another silicon atom, and x is 0 or 1. A composition including the treated filler, a method of making the treated filler, and a method of determining the degree of cure of a curable polymeric resin are also disclosed.