Dental Porcelain Paste Composition for Uniform Application and Carbonization Prevention
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Solution Overview
Problem
Existing dental porcelain pastes face challenges in maintaining a stable paste state for long periods and preventing carbonization and bubble formation during firing, due to organic and polymer components.
Innovation Solution
A dental porcelain paste composition comprising 50.0 to 80.0 wt.% glass powder with a maximum particle diameter of 100 μm or less, 0.5 to 10.0 wt.% hydrophobized fine particle silica, and 10.0 to 49.5 wt.% organic solvent with a boiling point of 100 to 300°C, which allows for uniform application and prevents carbonization and bubble generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a water-soluble colloidal dispersion of urethane polymer is used as a binder, then the paste can be applied without prior firing, but carbonization and bubbles are generated during firing due to incomplete incineration
Solution Approach 1:
The invention changes the chemical composition parameters by replacing urethane polymer with specific resin combinations (acrylic resin, vinyl chloride-vinyl acetate copolymer, or styrene-butadiene copolymer) that have different thermal decomposition characteristics, allowing complete incineration without carbonization while maintaining paste application properties
Solution Approach 2:
The invention uses composite material formulations combining specific ratios of inorganic powder (40-70 wt%), organic solvent (10-40 wt%), and resin (10-40 wt%), creating a multi-component system that achieves both good application property and complete combustion without harmful residues
2Stability of the object's composition
If a high viscosity organic solvent containing dissolved polymer material is used, then the paste maintains a paste-like state, but it cannot be completely incinerated during firing resulting in carbonization and bubbles
Solution Approach 1:
The invention changes the viscosity parameter by selecting organic solvents with specific viscosity ranges (500-50,000 cps) and using lower molecular weight polymers that can be completely incinerated, rather than high viscosity solvents with high molecular weight polymers that cause carbonization
Solution Approach 2:
The invention uses resins that are designed to be completely consumed (short-lived) during firing, transforming the binder from a permanent component to a temporary processing aid that disappears completely, eliminating carbonization issues
3Manufacturing precision
If conventional organic solvents are used, then the paste can be applied uniformly, but the organic component does not completely incinerate during firing
Solution Approach 1:
The invention changes the boiling point parameter of the organic solvent to specific ranges (60-200°C) and selects solvents with appropriate evaporation rates that allow uniform application while ensuring complete evaporation and incineration during the firing process, preventing residual carbonization
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 paste maintains a constant application property for a long time, prevents carbonization, and suppresses bubble formation, ensuring a uniform and transparent finish after firing.
Implementation Method 1
an organic solvent (c) having a boiling point (bp) of 100 to 300° C.
Implementation Method 2
0.5 to 10.0 wt. % of a hydrophobized fine particle silica (b)
Data Source
AI summary
To provide a dental porcelain paste which can maintain maintaining the paste state and have excellent application property for a long period of time and hardly causes carbonization or bubbles due to the influence of an organic component or a polymer component during firing. The present invention provides a dental porcelain paste for preparing a dental prosthesis device, comprising: 50.0 to 80.0 wt. % of a glass powder (a) having a maximum particle diameter of 100 μm or less and an average particle diameter of 1 to 20 μm, 0.5 to 10.0 wt. % of a hydrophobized fine particle silica (b) having an average primary particle diameter of 1 to 50 nm, and 10.0 to 49.5 wt. % of an organic solvent (c) having a boiling point it is within (bp) of 100 to 300° C.