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Low melting point glass composition excellent in water resistance

A low-melting glass and composition technology, which is applied in the direction of compression mold cup, dental prosthesis, dental prosthesis, etc., to achieve the effect of excellent acid resistance and low firing temperature

Active Publication Date: 2019-08-02
SHOFU INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] None of the existing technologies can achieve a softening point of less than 600°C while maintaining high acid resistance and excellent storage stability in high-humidity environments

Method used

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  • Low melting point glass composition excellent in water resistance
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Examples

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preparation example Construction

[0076] Preparation of the low-melting-point glass composition of the present invention can be carried out by those skilled in the art without limitation according to conventional general manufacturing methods of glass compositions. As a general production method, various inorganic compounds are blended to obtain the target glass composition, and the glass is melted at 1300 to 1500° C. in a glass melting furnace. This is a method in which a molten metal is made to flow in water and rapidly cooled (quenched) to obtain a glass frit.

[0077] In order to use the low-melting-point glass composition of the present invention as a dental pottery or a coloring material for dental ceramics, it is necessary to make the low-melting-point glass composition into a powder form. In order to prepare a low-melting glass composition powder, for example, there is a method of pulverizing the above-mentioned glass frit with a pulverizer such as a ball mill or a jet mill.

[0078] In this case, it ...

Embodiment 1～20、 comparative example 1～11

[0092] According to the glass composition described in Table 1, various inorganic compounds were prepared and melted, and the glass frits of Examples 1-20 and Comparative Examples 1-11 were manufactured (it shows it as weight%). The glass frits of Examples 1 to 20 and Comparative Examples 1 to 11 were pulverized to obtain glass frit powder having an average particle diameter of about 20 μm.

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Abstract

The invention provides a glass composition which can be used for a dental porcelain or a dental ceramics coloring material, and has low temperature meltability, acid resistance and preservation stability under the humid environment which are required for a dental porcelain or a dental ceramics coloring material, and a dental porcelain and dental ceramics coloring material which contain the glass composition powder. The invention provides a low melting glass composition with softening point (Ts) less than 600 degrees centigrade comprising, as a component; SiO2: 55.0 to 75.0 wt.%, B2O3: 6.1 to 12.0 wt.%, Al2O3: 2.0 to 8.0 wt.%, ZnO: 2.0 to 85 wt.% and two or more kinds of alkali metal oxide: 10.5 to 20.0 wt.%.

Description

technical field [0001] The present invention relates to a low-melting glass composition which can be used for dental pottery or dental ceramic coloring material. Background technique [0002] Dental ceramics are glass-ceramic materials made of feldspar, etc., and are mainly used for the restoration of crowns and prostheses for missing teeth. Classified according to the method of use, there are ceramics for metal bonding fired on a metal frame, ceramics for zirconia fired on a frame made of zirconia, and there are cases where dental ceramics are used alone to prepare prosthetic devices . [0003] In addition, the coloring material for dental ceramics is based on a glass material or a glass ceramic material like dental ceramics, and contains various coloring material components (pigments). It is used for color tone adjustment of dental ceramic materials and dental ceramic materials (alumina, zirconia, etc.). [0004] In recent years, properties required for dental ceramics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/118C03C3/093C03C4/20C04B35/64C09C1/00A61K6/02
CPCC03C3/118C03C3/093C03C4/20C04B35/64C09C1/0084A61K6/802C03C4/0021C03C14/00A61K6/836A61K6/833C03C3/083C03C8/14A61C13/083C03C2205/06A61C8/0015C03C3/087C03C2201/10C03C2201/12C03C2201/32C03C2201/42
Inventor 河田圭太后藤正宪河野显志
Owner SHOFU INC
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