Ether-Linked Ascorbic Acid Derivatives for Dental Adhesion
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Solution Overview
Problem
The adhesive properties of cured products obtained using ascorbic acid or ascorbic acid esters in dental materials need improvement.
Innovation Solution
The use of ascorbic acid derivatives or their salts, where hydroxyl groups are substituted with ether bonds to carbon atoms, as additives for polymerization initiation, combined with transition metal compounds and organic peroxides, to enhance adhesive properties in curable compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ascorbic acid or ascorbic acid ester is used as polymerization initiator, then polymerization can be achieved, but adhesive properties of cured product are insufficient
Solution Approach 1:
The patent modifies the chemical structure of ascorbic acid by substituting hydroxyl groups with ether bonds to carbon atoms, creating derivatives with improved adhesive properties while maintaining polymerization initiation capability. This structural parameter change resolves the contradiction between achieving polymerization and obtaining adequate adhesive properties.
Solution Approach 2:
The patent combines ascorbic acid derivatives with transition metal compounds and organic peroxides to create a composite polymerization initiation system. This composite approach enhances both the polymerization effectiveness and the adhesive properties of the cured product, resolving the contradiction between ease of manufacture and reliability.
2Reliability
If hydroxyl groups in ascorbic acid are substituted by ether bonds, then adhesive properties improve, but chemical reactivity may change
Solution Approach 1:
The patent systematically varies the substitution pattern of hydroxyl groups with ether bonds at different positions and degrees in the ascorbic acid structure. This controlled parameter change allows optimization of adhesive properties while maintaining sufficient chemical stability for dental material applications.
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 ascorbic acid derivatives or their salts improve the adhesive properties of cured products, leading to better bonding in dental materials.
Implementation Method 1
one of the common chemical polymerization initiator types is a redox type polymerization initiator that combines an oxidizing agent and a reducing agent. As a redox type polymerization initiator, for example, a polymerization initiator type using an organic peroxide as an oxidizing agent and an aromatic amine compound as a reducing agent is known.
Implementation Method 2
a polymerization initiator type using an organic peroxide as an oxidizing agent and an aromatic amine compound as a reducing agent is known
Implementation Method 3
Patent Document 1 discloses a redox type initiator containing ascorbic acid or an ascorbic acid ester, a transition metal component, an organic peroxide, and the like.
Implementation Method 4
A photopolymerization initiator, a chemical polymerization initiator, or the like may be used for polymerization of a curable composition for dental materials such as cement.
Data Source
AI summary
An ascorbic acid derivative or a salt thereof, includes a structure in which at least one of hydroxyl groups included in an ascorbic acid is substituted by an ether bond bonded to a carbon atom.