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EP0263489A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Granular inorganic moldings and a process for production thereof

Assignee: Kuraray Co Ltd
•
Filing: 1987-10-06
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Granted: —
•
Expires: 2007-10-06
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Abstract

Abstract According to the present invention, there can be provided granular inorganic moldings characterized in that the ratio A/D of the maximum diameter D and the maximum length A perpendicular to the maximum diameter of the granular molding is 0.5 to 0.9 and in that at least 80% of the granular moldings have a shape such that the crossing point of A and D is within 0.3 D from both sides of the center of D. Such moldings can be obtained in a high yield by filling an inorganic powder capable of calcination into an organic porous body having a 3-dimensional net-like structure and subjecting it to press forming thereby to form granules of the inorganic powder in the pores of the porous body and then burning off the organic porous body and at the same time, calcining the granular moldings. The granular inorganic moldings are useful e.g. as bone fillers.

Inventors

  • 👤 Seishiro Nakamura
  • 👤 Katutoshi Oukami
  • 👤 Masayuki Asada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 14:49
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61L; A61L27/00; A61L27/02; A61L27/10; A61L27/50; A61L27/56; B; B01; B01J; B01J35/00; B01J35/50; C04B38/00; C04B38/009; C12; C12N; C12N11/00; C12N11/14; A61F2/30; A61F2/3094; A61F2/30942; A61F2002/30957; A61L2400/00; A61L2400/18; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/30211; B01J2235/00; B01J2235/15

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 66 words
Granular inorganic moldings characterized in that the ratio A/D of the maximum diameter D and the maximum length A perpendicular to the maximum diameter of the granular molding is 0.5 to 0.9 and in that at least 80% of the granular moldings have a shape such that the crossing point of A and D is within 0.3 D from both sides of the center of D.
Claim 2
Dependent Claim 66 words
Granular inorganic moldings characterized in that the ratio A/D of the maximum diameter D and the maximum length A perpendicular to the maximum diameter of the granular molding is 0.5 to 0.9 and in that at least 80% of the granular moldings have a shape such that the crossing point of A and D is within 0.3 D from both sides of the center of D.
Claim 3
Dependent Claim 17 words
A granular inorganic molding as claimed in claim 1 wherein the relative density is at least 90%.
Claim 4
Dependent Claim 18 words
A granular inorganic molding as claimed in claim 1 which comprises a calcium phosphate as a main component.
Claim 5
Dependent Claim 18 words
A granular inorganic molding as claimed in claim 1 which comprises a metal oxide as a main component.
Claim 6
Dependent Claim 64 words
A process for producing granular inorganic moldin hich comprises filling an inorganic powder capable of calcination into an organic porous body having a 3-dimensional net-like structure and subjecting it to press forming thereby to form granules of the inorganic powder in the pores of the porous body and then burning off said organic porous body and at the same time, calcining the granular moldings.
Claim 7
Dependent Claim 64 words
A process for producing granular inorganic moldin hich comprises filling an inorganic powder capable of calcination into an organic porous body having a 3-dimensional net-like structure and subjecting it to press forming thereby to form granules of the inorganic powder in the pores of the porous body and then burning off said organic porous body and at the same time, calcining the granular moldings.
Claim 8
Dependent Claim 19 words
A process as claimed in claim 5 wherein said press forming is carried out as cold isostatic press fabrication.
Claim 9
Dependent Claim 17 words
A process as claimed in claim 5 wherein said calcination is performed at 500 °C or higher.
Claim 10
Dependent Claim 13 words
The granular inorganic moldings of Claim 1 for use for reparing bone defects.
Claim 11
Dependent Claim 17 words
Use of the granular inorganic moldings of Claim 1 as a carrier for immobilized enzymes or catalysts.

References Cited (Backward Citations)

US2847710A Cited
EP0054333A1 Cited
JPS6120558A Cited
EP0177727A2 Cited

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