Aluminosilicate glass and color adapting composition for ceramics

Abstract

The present invention relates to a color adapting composition used for coloring and color adapting porcelain for ceramic crown such as dental restorations and prosthetics, and aluminosilicate glass appropriate for using in a color adapting composition. More specifically, a color adapting composition for dental porcelains are prepared by blending two or more kinds of glass frits having different sintering temperatures from each other and an inorganic pigment or a colored glass obtained by previously dispersing inorganic pigments in glass.

1 . Aluminosilicate glass which comprises the following components:
 SiO 2 : 55.0-75.0% by weight,   B 2 O 3 : 5.0-20.0% by weight,   Al 2 O 3 : 5.0-15.0% by weight,   Li 2 O: 0.5-1.5% by weight,   Na 2 O: 3.0-8.0% by weight,   K 2 O: 3.0-8.0% by weight,   CaO: 1.0-5.0% by weight,   MgO: 0.1-1.0% by weight,   Sb 2 O 3 : 0.1-1.0% by weight;   
     the glass having a sintering temperature of 760-860° C. and a linear thermal expansion coefficient of 6.0×10 −6  K −1 -9.0×10 −6  K −1  in range of 25-500° C. 
   
   
       2 . Matrix glass which is a blend of two or more kinds of aluminosilicate glasses for producing a color adapting composition for ceramic crown porcelain, wherein each of the two or more kinds of aluminosilicate glasses is the aluminosilicate glass according to  claim 1 . 
   
   
       3 . The matrix glass according to  claim 2 , wherein the aluminosilicate glass has a sintering temperature of 760-860° C. and a linear thermal expansion coefficient of 6.0×10 −6  K −1 -9.0×10 −6  K −1  in a range of 25-500° C. 
   
   
       4 . The matrix glass according to  claim 2 , wherein a difference in sintering temperatures between the two of more kinds of aluminosilicate glasses is 40° C. or more. 
   
   
       5 . A color adapting composition for ceramic crown porcelain which comprises two of more kinds of aluminosilicate glasses and a coloring material, wherein each of the two or more kinds of aluminosilicate glasses is the aluminosilicate glass according to  claim 1 . 
   
   
       6 . The color adapting composition according to  claim 5 , which has a sintering temperature of 760-860° C. and a linear thermal expansion coefficient of 6.0×10 −6  K −1 -9.0×10 −6  K −1  in a range of 25-500° C. 
   
   
       7 . The color adapting composition according to  claim 5 , wherein a difference in sintering temperatures between the two of more kinds of aluminosilicate glasses is 40° C. or more. 
   
   
       8 . The color adapting composition according to  claim 5 , wherein the coloring material is colored glass in which inorganic pigment disperses in glass, and wherein the inorganic pigment is selected from a group consisting of oxides having a Mn—Al composition, a Ca—Sn—Si—Cr composition, a Ti—Cr—Sb composition, a Sn—Al—V composition, a Sn—Si—Al—Ti—V composition, a Ti—Sb—Si—Cr—Al composition, a Zn—Cr—Fe—Al composition, a Ti—Cr—W composition, a Zn—Fe—Cr—Si—Al—V composition, a Co—Al composition, a Co—Al—Zn composition, a Co—Mn—Cr—Fe composition, a Co—Mn—Cr composition, a Co—Fe—Al—Si composition, or a composition of TiO 2  or ZrSiO 4 . 
   
   
       9 . A set for producing a color adapting composition for ceramic crown porcelain which comprises at least two or more kinds of aluminosilicate glasses, wherein each of the two or more kinds of aluminosilicate glasses is the aluminosilicate glass according to  claim 1 . 
   
   
       10 . The set according to  claim 9 , wherein the color adapting composition has a sintering temperature of 760-860° C. and a linear thermal expansion coefficient of 6.0×10 −6  K −1 -9.0×10 −6  K −1  in a a range of 25-500° C. 
   
   
       11 . The set according to  claim 9 , wherein a difference in sintering temperatures between the two of more kinds of aluminosilicate glasses is 40° C. or more. 
   
   
       12 . The set according to  claim 9 , which further comprises colored glass in which inorganic pigment disperses in glass as a coloring material, wherein the inorganic pigment is selected from a group consisting of oxides having a Mn—Al composition, a Ca—Sn—Si—Cr composition, a Ti—Cr—Sb composition, a Sn—Al—V composition, a Sn—Si—Al—Ti—V composition, a Ti—Sb—Si—Cr—Al composition, a Zn—Cr—Fe—Al composition, a Ti—Cr—W composition, a Zn—Fe—Cr—Si—Al—V composition, a Co—Al composition, a Co—Al—Zn composition, a Co—Mn—Cr—Fe composition, a Co—Mn—Cr composition, a Co—Fe—Al—Si composition, or a composition of TiO 2  or ZrSiO 4 .