Dental Impression Curable Composition with Synergistic Surfactant System
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Solution Overview
Problem
Current dental impression materials face challenges with high surfactant concentrations, environmental impact due to non-biodegradable additives, and unsatisfactory contact angles, particularly when modified trisiloxane polyalkyleneoxides are dispersed in complex mixtures.
Innovation Solution
A curable composition combining a surfactant system with a first surfactant and fluorotelomers, which synergistically enhance surface migration and reduce contact angles at lower concentrations, while being biodegradable and environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If modified trisiloxane polyalkyleneoxides are used as surfactants in dental impression materials, then surface tension reduction and spreading ability are improved, but the concentration required is relatively high and environmental biodegradability is poor
Solution Approach 1:
The patent combines modified trisiloxane polyalkyleneoxides with fluorinated surfactants to create a synergistic surfactant system. This combination allows the modified trisiloxane polyalkyleneoxides to reach the critical wetting concentration more effectively while using lower overall concentrations, and the fluorinated component enhances biodegradability and reduces environmental impact.
Solution Approach 2:
The invention uses a composite surfactant system comprising both modified trisiloxane polyalkyleneoxides and fluorinated surfactants. This composite approach leverages the complementary properties of both surfactant types to achieve improved wetting performance at lower concentrations while enhancing environmental compatibility through the biodegradable fluorinated component.
2Adaptability or versatility
If modified trisiloxane polyalkyleneoxides are dispersed in complex mixtures of ingredients, then formulation flexibility is improved, but the surfactant cannot reach critical wetting concentration and performance is reduced
Solution Approach 1:
The fluorinated surfactant acts as an intermediary that facilitates the modified trisiloxane polyalkyleneoxides in reaching the impression material surface. The fluorinated component enhances the migration capacity and helps the modified trisiloxane polyalkyleneoxides achieve critical wetting concentration even when dispersed in complex mixtures, thereby maintaining reliable performance.
3Reliability
If additional surfactants are added to help modified trisiloxane polyalkyleneoxides perform properly, then wetting performance is improved, but the composition becomes more complex and environmental impact increases
Solution Approach 1:
The patent optimizes the concentration parameters and chemical structure parameters of the surfactant system. By carefully selecting the fluorinated surfactant properties and combining them with modified trisiloxane polyalkyleneoxides at specific ratios, the invention achieves improved wetting performance while controlling composition complexity and reducing environmental impact compared to using multiple additional surfactants.
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 low contact angles with reduced surfactant concentrations, improving surface wetting and environmental sustainability, overcoming previous drawbacks with enhanced performance and eco-friendliness.
Implementation Method 1
The modified trisiloxane polyalkyleneoxides are a powerful class of surfactants, since they have at the same time a quite high efficacy in reducing the surface tension (~20mN/m)
Implementation Method 2
The efficacy as a superspreader is lower when it is englobed in a matrix. This is caused by the lower migration capacity towards the impression material surface
Implementation Method 3
The fluorotelomers with longer chains show the best performances, but they are solids and even insoluble in water
Implementation Method 4
they typically react in the presence of a platinum catalyst (hydrosilylation reaction)
Implementation Method 5
Another class of impression materials are Condensation silicones impression materials that are normally made by polysiloxanes hydroxy terminated and alkoxysilanes cross linkers
Data Source
AI summary
The present invention is related to a curable composition for dental impression comprising: a curable base composition and a surfactant system comprising a first surfactant, which is at least one compound having formula (I) and a fluorotelomer having formula (II), which works synergistically with the fluorotelomer so as to permit the composition to surprisingly have a lower contact angle; these results are reached with relatively low concentrations of biodegradable surfactants. CF3-(CFX)n-(CH2)m-(CHOH)p-(CYOH) (II)