Denture Adhesive Copolymer Salt Composition for Taste and Hold
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Solution Overview
Problem
Existing denture adhesives face challenges with inadequate holding power, messiness, difficulty in removing residual adhesive, and undesirable taste, despite previous developments using alkyl vinyl ether-maleic copolymers and their salts.
Innovation Solution
A denture adhesive composition comprising salts of alkyl vinyl ether-maleic acid copolymers with specific ratios of calcium, strontium, and magnesium salts, combined with carboxymethyl cellulose and controlled levels of free acid, providing improved adhesion and taste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional denture adhesives are used, then basic adhesion is provided, but holding power is inadequate
Solution Approach 1:
The patent applies parameter changes by optimizing the molecular weight of the copolymer (1,000,000 to 3,000,000), controlling the alkyl group size (C1-C5), and adjusting the salt composition ratios to achieve superior adhesion strength and holding power compared to conventional adhesives
Solution Approach 2:
The invention uses composite materials by combining alkyl vinyl ether-maleic copolymers with specific metal salts (calcium, strontium, magnesium) and carboxymethyl cellulose to create a multi-component adhesive system that provides enhanced and reliable holding power
2Reliability
If traditional adhesive formulations are used, then adhesion is provided, but messiness occurs
Solution Approach 1:
The patent employs carboxymethyl cellulose as a flexible film-forming agent that creates a thin, cohesive adhesive layer, reducing messiness while maintaining effective adhesion between the denture and oral tissues
Solution Approach 2:
The composite formulation combining copolymer salts with carboxymethyl cellulose creates a cohesive adhesive matrix that minimizes residue and messiness while providing reliable adhesion
3Duration of action of stationary object
If residual adhesive remains in the mouth, then adhesion is maintained, but difficulty in removing residual adhesive occurs
Solution Approach 1:
The patent facilitates easy removal by designing an adhesive system that can be cleanly extracted from the oral cavity, with the copolymer and carboxymethyl cellulose formulation allowing for complete removal without stubborn residue
4Reliability
If certain adhesive components are used, then adhesion is provided, but undesirable taste is generated
Solution Approach 1:
The patent improves taste quality by carefully selecting and controlling the metal salt composition (calcium, strontium, magnesium ratios) and eliminating zinc salts, which are known to produce undesirable metallic tastes, while maintaining effective adhesion performance
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 enhanced adhesion, reduced messiness, and improved taste by optimizing the cationic salt function and free acid content, ensuring secure denture fit and user satisfaction.
Implementation Method 1
The denture stabilizer is formulated not only for its adherent properties, but also to provide a cushion or gasket between the denture and the gums or tissues
Implementation Method 2
from about 15% to about 25%, by weight of the composition of a carboxymethyl cellulose having a molecular weight of from about 200,000 to about 1,000,000 daltons
Data Source
AI summary
Denture adhesive compositions having good hold and improved taste containing a salt of a copolymer of alkyl vinyl ether-maleic acid or anhydride. Compositions containing from about 25% to about 45%, by weight of the composition, of a salt of a copolymer of alkyl vinyl ether-maleic acid or anhydride containing a cationic salt function containing: i) from about 60% to about 72% cations selected from calcium, strontium, magnesium, or combinations thereof; ii) from 0% to about 10% sodium cations; iii) less than 1% zinc cations; and iv) from about 25% to about 40% of a free acid component; and further containing from about 15% to about 25%, by weight of the composition of a carboxymethyl cellulose having a molecular weight of from about 200,000 to about 1,000,000 daltons; and a carrier. Methods of improving the adhesion of dentures to the oral cavity by applying such compositions to dentures, the oral cavity, or both, and thereafter securing the denture to the ridge or palate of the oral cavity.