Denture Adhesive Composition with Phosphate Cohesion Builder
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Solution Overview
Problem
Current denture adhesive compositions face challenges such as inadequate holding power, messiness, difficulty in removing residual adhesive, and undesirable taste, with a continuous need for improved stabilizing compositions that provide a strong and long-lasting hold.
Innovation Solution
A denture adhesive composition comprising a mixture of a partial salt of a copolymer of methyl vinyl ether-maleic acid or anhydride and sodium carboxy methyl cellulose, along with a cohesion builder component like di-basic sodium phosphate, which enhances the adhesive's cohesion and durability when hydrated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional denture adhesive compositions are used, then basic adhesive function is provided, but holding power is inadequate and resistance to washout is poor
Solution Approach 1:
The patent uses a composite material system combining hydrophilic polymer particles (sodium carboxymethyl cellulose and polyacrylic acid) with hydrophobic binder (petrolatum) to create an adhesive composition that provides both strong initial adhesion and sustained resistance to washout. The hydrophilic components provide bonding strength while the hydrophobic binder maintains structural integrity during oral functions.
Solution Approach 2:
The patent specifies precise parameter ranges for the hydrophilic polymer particles (0.1-10 micrometers diameter) and their composition (sodium carboxymethyl cellulose 10-50%, polyacrylic acid 30-70%) to optimize both holding power and washout resistance. These parameter controls ensure the adhesive maintains effectiveness throughout the wear period.
2Strength
If adhesive composition is applied to provide sufficient hold, then denture stability is improved, but messiness increases and residual adhesive becomes difficult to remove
Solution Approach 1:
The patent controls the particle size of hydrophilic polymer particles within 0.1-10 micrometers and specifies precise compositional ratios to enable the adhesive to provide strong holding power during wear while allowing for easy removal afterward. The controlled parameters ensure the adhesive bonds securely during use but can be cleanly removed without excessive residue.
3Strength
If adhesive components are formulated to enhance holding power, then denture stability is improved, but undesirable taste is introduced
Solution Approach 1:
The patent selects specific hydrophilic polymers (sodium carboxymethyl cellulose and polyacrylic acid) with controlled molecular characteristics and ratios that provide strong adhesion while maintaining acceptable taste. The parameter control of polymer composition (10-50% sodium carboxymethyl cellulose, 30-70% polyacrylic acid) ensures both holding power and sensory acceptability.
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 provides improved holding power, resistance to washout, and ease of removal, ensuring a secure and comfortable fit for dentures while minimizing mess and taste issues.
Implementation Method 1
The denture stabilizer is formulated not only for its adherent properties
Implementation Method 2
to provide a cushion or gasket between the denture and the gums or tissues
Implementation Method 3
a cohesion builder component in an amount from about 0.001% to about 10% by weight of the denture adhesive composition; wherein the cohesion builder component is di-basic sodium phosphate
Data Source
Figure 1A~1E
Figure 2A~2E
AI summary
A denture adhesive composition having a denture adhesive component and a cohesion builder component. The cohesion builder component may be of salts of mono-phosphates, salts of di- phosphates, or salts of tri-phosphates.