Alkali-and acid-resistant glass composition for the manufacture of glass strands

Patent metadata

Field	Value
Publication number	US-9790122-B2
Application number	US-9161506-A
Country	US
Kind code	B2
Filing date	Oct 23, 2006
Priority date	Oct 28, 2005
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The present invention relates to a glass composition which is resistant to alkalis and to acids, in particular for the preparation of reinforcing glass strands, which comprises the following constituents within the limits defined below, as percentages by weight:

SiO 2
≧58%, preferably ≦65%

ZrO 2
15-20%

R 2 O (R = Na, K or Li)
≧14%

K 2 O
≦0.1%, preferably ≦0.05%,

RO (R = Mg, Ca or Sr)
2.5-6%

MgO
≦4%

TiO 2
>1 and ≦4%

the composition additionally being devoid of F, comprising less than 1% of impurities (Al 2 O 3 , Fe 2 O 3 and Cr 2 O 3 ) and satisfying the following relationships:

ZrO 2 +TiO 2 ≧17%

ZrO 2 /TiO 2 ≧6

It also relates to the use of the glass strands obtained in the reinforcing of inorganic materials, for example cementitious materials, or organic materials, for example plastics, and to the composites including such strands.

First claim

What is claimed is:

1. An alkali and acid resistant glass composition, the glass composition consisting essentially of, as percentages by weight of the glass composition:

SiO 2
≧58.0%;

ZrO 2
15.0-20.0%;

Na 2 O
≧14.0%;

K 2 O
≦0.1%;

Li 2 O
<0.5%;

CaO
2.5-5.0%;

TiO 2
≧1.0% and ≦2.25%;

Fe 2 O 3
<1.0%;

Al 2 O 3
>0 and <0.5%;

Cr 2 O 3
≦0.05%;

ZrO 2 + TiO 2
≧17.0%; and

ZrO 2 /TiO 2
≧6;

wherein the glass composition is devoid of F,
wherein the difference between a forming temperature and a liquidus temperature of the glass composition is at least 60.0° C., and
wherein the glass composition has a forming temperature no greater than 1,320° C.

2. The glass composition of claim 1 , wherein the glass composition satisfies the relationship Na 2 O/ZrO 2 ≧0.75.

3. The glass composition of claim 1 , wherein the glass composition is devoid of Li 2 O.

4. The glass composition of claim 1 , wherein the glass composition is devoid of SrO and MgO.

5. The glass composition of claim 1 , wherein the glass composition includes ≦65.0 wt. % of SiO 2 , based on the weight of the total glass composition.

6. The glass composition of claim 1 , wherein the glass composition includes ≦0.05 wt. % of K 2 O, based on the weight of the total glass composition.

7. The glass composition of claim 1 , wherein the difference between the forming temperature and the liquidus temperature of the glass composition is at least 80.0° C.

8. The glass composition of claim 1 , wherein the forming temperature is no greater than 1,310° C.

9. A glass strand formed from an alkali and acid resistant glass composition, the glass composition consisting essentially of, as percentages by weight of the glass composition:

SiO 2
≧58.0%;

ZrO 2
15.0-20.0%;

Na 2 O
≧14.0%;

K 2 O
≦0.1%;

Li 2 O
<0.5%;

CaO
2.5-5.0%;

TiO 2
≧1.0% and ≦4.0%;

Al 2 O + Fe 2 O 3
<1.0%;

Cr 2 O 3
≦0.05%;

MgO
≦4.0%;

ZrO 2 + TiO 2
≧17.0%; and

ZrO 2 /TiO 2
≧6;

wherein said glass composition is devoid of F,
wherein the difference between the forming temperature and the liquidus temperature of said glass composition is at least 80° C., and
wherein the glass composition has a forming temperature no greater than 1,320° C.

10. A composite comprising:
a plurality of glass strands; and
at least one of an inorganic material and an organic material, wherein the glass strands are formed from a glass composition consisting essentially of, as percentages by weight of the glass composition:

SiO 2
≧58.0%;

ZrO 2
15.0-20.0%;

Na 2 O
≧14.0%;

K 2 O
≦0.1%;

Li 2 O
<0.5%;

CaO
2.5-5.0%;

TiO 2
≧1.0% and ≦2.25%;

Fe 2 O 3
<1.0%;

Al 2 O 3
>0 and <0.5%;

Cr 2 O 3
≦0.05%;

ZrO 2 + TiO 2
≧17.0%; and

ZrO 2 /TiO 2
≧6;

wherein the glass composition is devoid of F, and
wherein the glass composition has a forming temperature no greater than 1,320° C.

11. The composite of claim 10 , wherein the inorganic material includes highly basic materials.

12. The composite of claim 10 , wherein the inorganic material is a cementitious material comprising one or more of cement, concrete, mortar, gypsum, slag, and a compound formed by

Assignees

• Lecomte Emmanuel
• Dallies Eric
• Berthereau Anne
• Ocv Intellectual Capital Llc

Inventors

• Lecomte Emmanuel
• Dallies Eric
• Berthereau Anne

Classifications

• C03C13/002

  containing zirconium · CPC title

• C03C3/087 Primary

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C13/00 Primary

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