Two-Component Dental Polymerizable Composition for Storage Stability
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Solution Overview
Problem
Existing polymerizable compositions face challenges with storage stability, particularly after long-term storage, which affects their curability and usability in dental applications.
Innovation Solution
A two-component dental polymerizable composition comprising a first component with (meth)acrylate, a pentavalent vanadium compound, and a thiourea derivative, and a second component with (meth)acrylate and an organic peroxide, optimized in mass ratios and component contents to enhance storage stability and curability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a polymerizable composition is stored for long-term use, then the composition remains available for future application, but the curability and effectiveness of the composition deteriorates
Solution Approach 1:
The invention changes the chemical parameters of the composition by introducing a complexing agent that forms a stable complex with the vanadium compound. This parameter change prevents premature polymerization while maintaining curability, resolving the contradiction between long-term storage stability and effective curability after storage
Solution Approach 2:
The complexing agent acts as an intermediary between the vanadium compound and the polymerizable components. It mediates the interaction by forming a stable complex that prevents premature reaction while allowing controlled polymerization when needed, thus maintaining both storage stability and curability
2Productivity
If the composition is designed for high reactivity to ensure good curability, then the setting speed improves, but the storage stability deteriorates due to premature polymerization
Solution Approach 1:
The invention performs a preliminary action by forming a stable complex between the complexing agent and vanadium compound before use. This preliminary complex formation prevents premature polymerization during storage, while the underlying reactive components remain intact and ready to polymerize quickly when the composition is actually applied
Solution Approach 2:
The complexing agent performs a preliminary anti-action by inhibiting premature polymerization through complex formation. This anti-action counteracts the tendency toward spontaneous polymerization during storage, while not interfering with the intended polymerization reaction when the composition is properly applied
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 composition exhibits improved storage stability and curability, maintaining effective working times and mechanical strength, suitable for dental cements, desensitizers, and sealants.
Implementation Method 1
a second component including a (meth)acrylate and an organic peroxide
Implementation Method 2
a first component including a (meth)acrylate, a pentavalent vanadium compound, and a thiourea derivative
Data Source
AI summary
A dental polymerizable composition includes: a first component containing a (meth)acrylate, a pentavalent vanadium compound, and a thiourea derivative; and a second component containing a (meth)acrylate and an organic peroxide.