GLASS FOR PHARMACEUTICAL CONTAINERS

• US 20160107924A1
• Filed: 06/04/2014
• Published: 04/21/2016
• Est. Priority Date: 06/06/2013
• Status: Active Grant

• Current Assignee: Nippon Electric Glass Company Limited
• Original Assignee: Nippon Electric Glass Company Limited
• Inventors: CHOJU, Ken, YAMAMOTO, Kazuyuki
• Granted Patent: US 10,384,975 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61J 1/05 for collecting, storing or administering blood, plasma or medical fluids multiple bags systems for separating or storing blood components A61M1/0209; Infusion or perfusion containers
• CPC Class Codes: C03C 3/083 containing aluminium oxide or an iron compound
• CPC Class Codes: C03C 3/085 containing an oxide of a divalent metal
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/091 containing aluminium
• CPC Class Codes: C03C 3/093 containing zinc or zirconium
• CPC Class Codes: C03C 4/20 for chemical resistant glass

Abstract

An object of the present invention is to provide a glass for pharmaceutical containers, which is resistant to delamination and has excellent processibility.

The glass for pharmaceutical containers of the present invention comprises, in mol % on an oxide basis, 69 to 81% of SiO₂, 4 to 12% of Al₂O₃, 0 to 5% of B₂O₃, 5 to 20% of Li₂O+Na₂O+K₂O, 0.1 to 12% of Li₂O, and 0 to 10% of MgO+CaO+SrO+BaO. The glass has a hydrolytic resistance of Class 1 in a test in accordance with the European pharmacopoeia.

Claims

1. A glass for pharmaceutical containers comprising, in mol % on an oxide basis, 69 to 81% of SiO₂, 4 to 12% of Al₂O₃, 0 to 5% of B₂O₃, 5 to 20% of Li₂O+Na₂O+K₂O, 0.1 to 12% of Li₂O, and 0 to 10% of MgO+CaO+SrO+BaO.

2. The glass for pharmaceutical containers according to claim 1, comprising, in mol % on an oxide basis, 0 to 4% of B₂O₃.

3. The glass for pharmaceutical containers according to claim 1, comprising, in mol % on an oxide basis, 0 to 11% of Na₂O and 0 to 5% of K₂O.

4. The glass for pharmaceutical containers according to claim 1, comprising, in mol % on an oxide basis, 0 to 9% of MgO, 0 to 4% of CaO, 0 to 4% of SrO, and 0 to 4% of BaO.

5. The glass for pharmaceutical containers according to claim 1, further comprising 0 to 2 mol % of ZrO₂.

6. The glass for pharmaceutical containers according to claim 1, having a hydrolytic resistance of Class 1 in a test in accordance with the European pharmacopoeia.

7. The glass for pharmaceutical containers according to claim 1, having an alkali resistance of at least Class 2 in a test in accordance with ISO 695.

8. The glass for pharmaceutical containers according to claim 1, having a working point of 1260°

C. or less.

10. A glass tube for pharmaceutical containers, made of the glass for pharmaceutical containers of claim 1.

9. A glass for pharmaceutical containers comprising, in mol % on an oxide basis, 69 to 81% of SiO₂, 4 to 12% of Al₂O₃, 0 to 5% of B₂O₃, 5 to 20% of Li₂O+Na₂O+K₂O, 0.1 to 12% of Li₂O, 0 to 11% of Na₂O, 0 to 5% of K₂O, and 0 to 10% of MgO+CaO+SrO+BaO, wherein the Li₂O content is higher than the K₂O content.