Borosilicate glass with high chemical resistance and application thereof

Patent metadata

Field	Value
Publication number	US-11319242-B2
Application number	US-201716473246-A
Country	US
Kind code	B2
Filing date	Dec 26, 2017
Priority date	Dec 29, 2016
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

The invention discloses a borosilicate glass with high chemical resistance and an application thereof. The borosilicate glass contains 0.25-4.0 wt % of Y2O3 based on the oxide. The borosilicate glass has a high chemical stability, a suitable linear thermal expansion coefficient and is suitable for use in the field of pharmaceutical packaging materials.

First claim

What is claimed is:

1. A borosilicate glass comprising the following constituents based on oxide:

SiO 2
70-77
wt %,

B 2 O 3
9.0-12
wt %,

Al 2 O 3
3.0-7.0
wt %,

Na 2 O
5.0-8.0
wt %,

K 2 O
0-2.0
wt %,

Li 2 O
0-1.0
wt %,

wherein Σ(Na 2 O + K 2 O + Li 2 O)
5.0-8.0
wt %,

CaO
0-3.0
wt %,

MgO
0-1.0
wt %,

BaO
0-2.0
wt %,

wherein Σ(CaO + MgO + BaO)
0-5.0
wt %,

CeO 2
0-1.0
wt %,

NaCl
0-1.0
wt %,

Y 2 O 3
0.25-4.0
wt %.

2. The borosilicate glass of claim 1 comprising at least one of La 2 O 3 , ZrO 2 , and ZnO in a total amount from 0.49 to 4.0 wt %, wherein the content of each oxide is independently from 0 to 4.0 wt %.

3. The borosilicate glass of claim 1 comprising at least one of La 2 O 3 , ZrO 2 , and ZnO in a total amount from 0.49 to 3.0 wt %%, wherein the content of each oxide is independently from 0 to 3.0 wt %.

4. The borosilicate glass of claim 1 , wherein the borosilicate glass is free of As 2 O 3 and/or Sb 2 O 3 apart from inevitable impurities.

5. The borosilicate glass of claim 1 , having a coefficient of linear thermal expansion α20/300 from 4.6×10 −6 /K to 5.2×10 −6 /K, a class 1 water resistance according to YBB00362004-2015, a class 1 acid resistance according to YBB00342004-2015, and/or a class 1 alkali resistance according to YBB00352004-2015.

6. A process of using the borosilicate glass of claim 1 , wherein the glass is melted and formed into an article for a packaging material for a pharmaceutical, a container or a chemical device for a chemically erosive liquid, a sealing glass for an alloy or a glass fiber.

7. The process of claim 6 , wherein the glass fiber is for reinforcing concrete.

8. A borosilicate glass comprising the following constituents based on oxide:

SiO 2
70-76
wt %,

B 2 O 3
9.0-11.5
wt %,

Al 2 O 3
3.5-6.5
wt %,

Na 2 O
5.0-7.0
wt %,

K 2 O
0-1.0
wt %,

Li 2 O
0-1.0
wt %,

wherein Σ(Na 2 O + K 2 O + Li 2 O)
6.5-8.0
wt %,

CaO
0-2.0
wt %,

MgO
0-1.0
wt %,

BaO
0-1.5
wt %,

wherein Σ(CaO + MgO + BaO)
0-4.5
wt %,

CeO 2
0-0.5
wt %,

Y 2 O 3
0.5-3.5
wt %.

9. The borosilicate glass of claim 8 , comprising at least one of La 2 O 3 , ZrO 2 , and ZnO in a total amount from 0.49 to 4.0 wt %, wherein the content of each oxide is independently from 0 to 4.0 wt %.

10. The borosilicate glass of claim 8 , comprising at least one of La 2 O 3 , ZrO 2 , and ZnO in a total amount from 0.49 to 3.0 wt %, wherein the content of each oxide is independently from 0 to 3.0 wt %.

11. The borosilicate glass of claim 8 , wherein the borosilicate glass is free of As 2 O 3 and/or Sb 2 O 3 apart from inevitable impurities.

12. The borosilicate glass of claim 8 , having a coefficient of linear thermal expansion α 20/300 from 4.6×10 −6 /K to 5.2×10 −6 /K, a class 1 water resistance according to YBB00362004-2015, a class 1 acid resistance according to YBB00342004-2015, and/or a class 1 alkali resistance according to YBB00352004-2015.

13. A process of using the borosilicate glass of claim 8 , wherein the glass is melted and formed into an article for a packaging material for a pharmaceutical, a container or a chemical device for a chemically erosive liquid, a sealing glass for an alloy or a glass fiber.

14. A borosilicate glass comprising the following constituents based on oxide:

SiO 2
71-75.5
wt %,

B 2 O 3
9.1-11.0
wt %,

Al 2 O 3
3.8-6.5
wt %,

Na 2 O
5.5-7.0
wt %,

Assignees

• Sunshine Lake Pharma Co Ltd
• North & South Brother Pharmacy Investment Co Ltd

Inventors

• Hong Weiqiang
• Zhou Zhengshang
• Jiang Yong
• Zhu Lianying
• He Xinqian
• Han Hongxing

Classifications

• C03C13/00

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · CPC title

• C03C8/24

  Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders · CPC title

• C03C4/20 Primary

  for chemical resistant glass · CPC title

• C03C3/095 Primary

  containing rare earths · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title