Glass for medicine container and glass tube for medicine container

Patent metadata

Field	Value
Publication number	US-11542191-B2
Application number	US-201816648878-A
Country	US
Kind code	B2
Filing date	Oct 16, 2018
Priority date	Oct 20, 2017
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

The present invention relates to a glass for a pharmaceutical container that is excellent in ultraviolet shielding ability, and is also excellent in chemical durability. The glass for a pharmaceutical container of the present invention includes as a glass composition, in terms of mass %, 67% to 81% of SiO2, more than 4% to 7% of Al2O3, 7% to 14% of B2O3, 3% to 12% of Na2O+K2O, 0% to 1.8% of CaO+BaO, 0.5% to less than 2% of Fe2O3, and 1% to 5% of TiO2, and satisfies a relationship of CaO/BaO≤0.5.

First claim

The invention claimed is:

1. A glass for a pharmaceutical container, which comprises as a glass composition, in terms of mass %, 67% to 81% of SiO 2 , more than 4% to 7% of Al 2 O 3 , 7% to 14% of B 2 O 3 , 6% to 8.55% of Na 2 O+K 2 O, 0.8% to 1.8% of CaO+BaO, 0.1% to 1.8% of BaO, 0.5% to less than 2% of Fe 2 O 3 , and 1% to 5% of TiO 2 , and satisfies a relationship of CaO/BaO≤0.4,
wherein the glass has a transmittance at a wavelength of 450 nm that is 15% or less when having a thickness of 1 mm.

2. The glass for a pharmaceutical container according to claim 1 , wherein the glass comprises as a glass composition, in terms of mass %, 70% to 78% of SiO 2 , 5% to 7% of Al 2 O 3 , 8% to 11% of B 2 O 3 , 6% to 8.55% of Na 2 O+K 2 O, 0.8% to 1.8% of CaO+BaO, 0.8% to 1.2% of Fe 2 O 3 , and 2% to 5% of TiO 2 , and satisfies a relationship of CaO/BaO≤0.3.

3. The glass for a pharmaceutical container according to claim 2 , wherein the glass comprises as a glass composition, in terms of mass %, 9% to 11% of B2O 3 .

4. The glass for a pharmaceutical container according to claim 1 , wherein the glass comprises as a glass composition, in terms of mass %, 9% to 11% of B 2 O 3 .

5. The glass for a pharmaceutical container according to claim 1 , wherein the glass has a consumption amount of 0.02 mol/L hydrochloric acid per unit glass mass 0.035 mL or less in a hydrolytic resistance test by a glass grains test method in conformity with the European Pharmacopoeia 7.0.

6. The glass for a pharmaceutical container according to claim 1 , wherein the glass has a working point of 1,200° C. or less.

7. A glass tube for a pharmaceutical container, comprising the glass for a pharmaceutical container of claim 1 .

8. A glass tube for a pharmaceutical container, comprising the glass for a pharmaceutical container of claim 2 .

9. A glass tube for a pharmaceutical container, comprising the glass for a pharmaceutical container of claim 4 .

10. A glass tube for a pharmaceutical container, comprising the glass for a pharmaceutical container of claim 5 .

11. A glass tube for a pharmaceutical container, comprising the glass for a pharmaceutical container of claim 6 .

12. A glass tube for a pharmaceutical container, comprising the glass for a pharmaceutical container of claim 3 .

13. A glass for a container, which comprises as a glass composition, in terms of mass %, 67% to 81% of SiO 2 , more than 4% to 7% of Al 2 O 3 , 7% to 14% of B 2 O 3 , 6% to 8.55% of Na 2 O+K 2 O, 0.8% to 1.8% of CaO+BaO, 0.1% to 1.8% of BaO, 0.5% to less than 2% of Fe 2 O 3 , and 1% to 5% of TiO 2 , and satisfies a relationship of CaO/BaO≤0.4,
wherein the glass has a transmittance at a wavelength of 450 nm that is 15% or less when having a thickness of 1 mm.

14. A glass tube for a container, comprising the glass for a container of claim 13 .

Assignees

• Nippon Electric Glass Co

Inventors

• Arai Satoshi

Classifications

• C03C4/02

  for coloured glass · CPC title

• C03C3/085

  containing an oxide of a divalent metal · CPC title

• C03C4/18

  for ion-sensitive glass · CPC title

• C03C3/11 Primary

  containing halogen or nitrogen · CPC title

• C03C3/091

  containing aluminium · CPC title