Dental Polymerizable Composition Storage Stability via Beta-Diketone
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Solution Overview
Problem
The existing two-component dental polymerizable compositions face challenges in maintaining curability after long-term storage, resulting in poor storage stability.
Innovation Solution
Incorporating a β-diketone into the first agent, alongside (meth)acrylate, a thiourea derivative, a vanadium compound, and an organic peroxide in the second agent, to enhance the storage stability of the dental polymerizable composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a two-component dental polymerizable composition is stored for long periods, then the composition maintains its initial properties, but the curability deteriorates
Solution Approach 1:
A β-diketone is introduced as an intermediary substance that mediates between the vanadium compound and the (meth)acrylate. The β-diketone forms a complex with the vanadium compound, which then selectively catalyzes the polymerization of (meth)acrylate. This intermediary mechanism prevents direct unwanted reactions between the composition components during storage while ensuring curability when activated by the vanadium-β-diketone complex.
Solution Approach 2:
The invention changes the chemical parameters of the composition by introducing the β-diketone component. This alters the reaction mechanism from direct polymerization to a catalyzed process involving the vanadium-β-diketone complex. The parameter change enables the composition to remain stable during storage while achieving reliable curability when the catalytic system is activated.
2Speed
If the composition is designed for rapid curability, then the setting time is short, but the storage stability deteriorates
Solution Approach 1:
The invention introduces dynamic control to the curability process through the vanadium-β-diketone catalytic system. The catalysis is activated only when the vanadium compound interacts with the β-diketone in the presence of moisture or specific conditions, allowing the composition to transition from a stable stored state to an actively curing state. This dynamic activation mechanism enables rapid curability when needed while maintaining storage stability during the dormant period.
Solution Approach 2:
The invention replaces direct mechanical mixing or immediate chemical reaction with a catalytic mechanism involving the vanadium-β-diketone complex. Instead of relying on direct contact between all components for immediate reaction, the system uses the catalytic action of the vanadium-β-diketone complex to initiate and accelerate polymerization, thereby achieving rapid curability without compromising storage stability.
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 addition of β-diketone significantly improves the storage stability of the two-component dental polymerizable composition, ensuring excellent curability even after extended storage periods.
Implementation Method 1
a first agent containing a (meth)acrylate, a thiourea derivative, a vanadium compound and a β-diketone
Implementation Method 2
dental polymerizable composition including a first agent containing a (meth)acrylate, a thiourea derivative, a vanadium compound and a β-diketone, and a second agent containing a (meth)acrylate and an organic peroxide
Implementation Method 3
a second agent containing a (meth)acrylate and an organic peroxide
Data Source
AI summary
A dental polymerizable composition includes a first agent containing a (meth)acrylate, a thiourea derivative, a vanadium compound, and a β-diketone, and a second agent containing a (meth)acrylate and an organic peroxide.