Dental Curable Composition Ultraviolet Absorber Solubility
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Solution Overview
Problem
Existing dental curable compositions face challenges with the solubility of ultraviolet absorbers, sunlight stability, fluorescence, and mechanical properties.
Innovation Solution
A dental curable composition is formulated with a specific ultraviolet absorber that has at least one absorption maximum in the wavelength region of 250 to 320 nm and another in the region of 320 to 400 nm, with a ratio of absorbance between these maxima ranging from 1 to 4.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ultraviolet absorbers are used in dental curable compositions, then the composition can provide UV protection, but the solubility of the ultraviolet absorber deteriorates
Solution Approach 1:
The patent changes the molecular structure parameters of the ultraviolet absorber by introducing specific chromophore groups (benzotriazole, benzophenone, or cinnamide groups) with defined substitution patterns. This structural parameter change enables the absorber to maintain excellent solubility in polymerizable monomers while preserving UV protection functionality.
Solution Approach 2:
The patent creates a composite molecular structure combining the ultraviolet absorber with specific functional groups (carboxyl, hydroxyl, or amine groups) that enhance solubility. This composite approach allows the absorber to integrate seamlessly into the dental curable composition matrix.
2Reliability
If conventional ultraviolet absorbers are used in dental curable compositions, then the composition can provide UV protection, but the sunlight stability deteriorates
Solution Approach 1:
The patent modifies the chemical parameters of the ultraviolet absorber by selecting specific chromophore structures (benzotriazole, benzophenone, cinnamide) with defined substitution patterns that provide both UV protection and enhanced stability against sunlight-induced degradation.
Solution Approach 2:
The patent employs ultraviolet absorbers with optimized molecular structures that resist degradation over time, effectively replacing unstable conventional absorbers with more durable alternatives that maintain performance throughout the material's service life.
3Reliability
If conventional ultraviolet absorbers are used in dental curable compositions, then the composition can provide UV protection, but the fluorescence deteriorates
Solution Approach 1:
The patent adjusts the molecular parameters of the ultraviolet absorber by choosing chromophore groups with specific absorption characteristics that do not interfere with fluorescence emission. The substitution patterns are designed to maintain UV absorption while allowing fluorescent agents to function effectively.
Solution Approach 2:
The patent separates the UV absorption function from the fluorescence function by using ultraviolet absorbers with optimized structures that do not quench fluorescence. This functional segmentation allows both UV protection and fluorescence to coexist without mutual interference.
4Reliability
If conventional ultraviolet absorbers are used in dental curable compositions, then the composition can provide UV protection, but the mechanical property deteriorates
Solution Approach 1:
The patent optimizes the molecular parameters of the ultraviolet absorber to ensure compatibility with the polymer matrix. The substitution patterns and chromophore structures are selected to maintain good interfacial adhesion and mechanical strength while providing UV protection.
Solution Approach 2:
The patent creates a composite system where the ultraviolet absorber is chemically integrated with the polymerizable monomer through functional groups (carboxyl, hydroxyl, amine). This composite integration ensures that the absorber becomes part of the crosslinked network, maintaining mechanical strength.
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 achieves excellent solubility of the ultraviolet absorber, enhanced sunlight stability, improved fluorescence, and increased mechanical strength, while also simplifying the formulation by eliminating the need for multiple ultraviolet absorbers.
Implementation Method 1
the dental curable composition comprises, as the (D) ultraviolet absorber, (D-1) compound having at least one first absorption maximum in the wavelength region of 250 to 320 nm and at least one second absorption maximum in the wavelength region of 320 to 400 nm
Implementation Method 2
the dental curable composition comprises, (C) fluorescent agent
Implementation Method 3
the dental curable composition comprises, (B) polymerization initiator, (A) polymerizable monomer
Data Source
AI summary
To provide a dental curable composition having excellent solubility of an ultraviolet absorber, sunlight stability, fluorescence property, and mechanical property.To provide a dental curable composition comprising, (A) polymerizable monomer, (B) polymerization initiator, (C) fluorescent agent, and (D) ultraviolet absorber, wherein, the dental curable composition comprises, as the (D) ultraviolet absorber, (D-1) compound having at least one first absorption maximum in the wavelength region of 250 to 320 nm and at least one second absorption maximum in the wavelength region of 320 to 400 nm, wherein the ratio of an absorbance of the first absorption maximum to an absorbance of the second absorption maximum is within the range of 1 to 4.