Polyether Dental Composition with F-Compound for Foaming Control
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Solution Overview
Problem
Dental impression materials face challenges in manufacturing due to foaming during the de-gassing process, which affects the quality of the impressions and is time-consuming, and existing fluorinated surfactants may compromise other desirable properties.
Innovation Solution
A curable dental composition comprising a polyether group containing polymer, an initiator, and an F-containing compound with specific fluorinated structures that improve hydrophilicity and reduce foaming during the de-gassing process without adversely affecting other properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated surfactants are used to improve hydrophilicity, then the material becomes more hydrophilic, but foaming occurs during the de-gassing process
Solution Approach 1:
The patent changes the chemical parameters of the fluorinated compound by specifying a particular molecular structure where the fluorinated alkyl group is directly bonded to the polyether backbone without additional hydrocarbon linkers. This structural parameter change reduces the compound's tendency to generate foam while preserving its hydrophilic properties, thus resolving the contradiction between improving hydrophilicity and preventing foaming
Solution Approach 2:
The patent creates a composite molecular structure combining a polyether backbone with a fluorinated alkyl group directly attached to it. This composite structure integrates the hydrophilic nature of polyether with the surface-active properties of fluorinated compounds, achieving both hydrophilicity and reduced foaming behavior through the synergistic combination of these functional groups
2Object-generated harmful factors
If de-gassing is performed to remove foaming, then foaming is reduced, but the process is time-consuming and affects productivity
Solution Approach 1:
The fluorinated compound acts preliminarily by suppressing foam formation at the source during mixing and incorporation into the dental composition. By preventing bubble formation in advance rather than requiring extensive post-mixing de-gassing, the compound reduces the time and energy needed for the de-gassing step, thereby improving productivity while still achieving the goal of minimizing foaming
3Reliability
If existing fluorinated surfactants are used, then hydrophilicity is improved, but other desirable properties of the composition are compromised
Solution Approach 1:
The patent optimizes the molecular weight and structural parameters of the fluorinated compound to achieve a balance between hydrophilicity and storage stability. By controlling the chain length of the fluorinated alkyl group and its direct attachment to the polyether backbone, the compound provides sufficient hydrophilic character without excessive reactivity or instability, thus resolving the contradiction between improving hydrophilicity and maintaining storage stability
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 F-containing compound enhances the de-gassing efficiency, improves hydrophilicity, and maintains or improves other desired properties such as storage stability and setting characteristics, reducing the time and pressure required for de-gassing.
Implementation Method 1
an F-containing compound... wherein the F-containing compound has the following formula: (G1-L1-O)s—Rfa—O-L2-G2... G1 and G2 each independently represents a non-ionic endgroup... L1 and L2 each independently represents an aliphatic hydrocarbon group or a partially or fully fluorinated aliphatic hydrocarbon group... Rfa represents a mono-valent or divalent partially or fully fluorinated aliphatic group
Data Source
AI summary
The invention relates to a curable dental composition comprising a curable polyether group containing polymer as component (A), an initiator capable of initiating a curing reaction of component (A) as component (B) and a certain F-containing compound as component (C). The invention also relates to a method of production and use of the curable dental composition or a respective kit of parts for the preparation of or as impression material or for the preparation of crowns and bridges.