High performance fiberglass composition

Patent metadata

Field	Value
Publication number	US-12344546-B2
Application number	US-202217963583-A
Country	US
Kind code	B2
Filing date	Oct 11, 2022
Priority date	Dec 19, 2017
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A glass composition is provided that includes about 55.0 to 60.4% by weight SiO2, about 19.0 to 25.0% by weight Al2O3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li2O, 0.0 to about 1.0% by weight Na2O, and 0 to about 1.5% by weight TiO2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

First claim

The invention claimed is:

1. A glass composition comprising:
SiO 2 in an amount from 55.0 to 60.4% by weight;
Al 2 O 3 in an amount from 19.0 to 25.0% by weight;
CaO in an amount from 7 to 12.0% by weight;
MgO in an amount from 12.5 to 15.0% by weight;
Na 2 O in an amount from 0 to 1.0% by weight;
Li 2 O in an amount less than 0.5% by weight; and
TiO 2 in an amount from 0.0 to 1.5% by weight, expressed as percentages by weight based on the weight of the entire composition, wherein the combined amounts of SiO 2 , Al 2 O 3 , MgO, and CaO is between 98% by weight and 99.5% by weight, wherein said glass composition has a fiberizing temperature no greater than 2,375° F.

2. The glass composition according to claim 1 , wherein the combined amounts of SiO 2 , Al 2 O 3 , MgO, and CaO is between 98.5% by weight and 99.4% by weight.

3. The glass composition according to claim 1 , wherein the combined amounts of SiO 2 , Al 2 O 3 , MgO, and CaO is between 98.7% by weight and 99.3% by weight.

4. The glass composition according to claim 1 , wherein the combined amounts of MgO and CaO is greater than 20% by weight.

5. The glass composition according to claim 1 , wherein said composition comprises 19.5 to 21% by weight Al 2 O 3 .

6. The glass composition according to claim 1 , wherein the weight percent ratio of Al 2 O 3 /MgO is no greater than 1.8.

7. The glass composition according to claim 1 , wherein said composition comprises 0.1 to 0.5% by weight Fe 2 O 3 .

8. The glass composition according to claim 1 , wherein said composition comprises 0.01 to 0.5% by weight Na 2 O and 0.01 to 0.5% by weight K 2 O.

9. The glass composition according to claim 1 , wherein said composition comprises 0.1 to 0.8% by weight TiO 2 .

10. The glass composition according to claim 1 , wherein the sum of the amounts of B 2 O 3 , Li 2 O, and fluorine is less than 0.5% by weight.

11. The glass composition according to claim 1 , wherein said composition comprises Li 2 O in an amount less than 0.1% by weight.

12. The glass composition according to claim 1 , wherein the combined amounts of Fe 2 O 3 , TiO 2 , K 2 O, and Na 2 O is below 1.5% by weight.

13. The glass composition according to claim 1 , wherein said glass composition has a Young's modulus between 85 GPa and 95 GPa.

14. A glass fiber formed from a glass composition comprising:
SiO 2 in an amount from 55.0 to 60.4% by weight;
Al 2 O 3 in an amount from 19.0 to 25.0% by weight;
CaO in an amount from 7 to 12.0% by weight;
MgO in an amount from 12.5 to 15.0% by weight;
Na 2 O in an amount from 0 to 1.0% by weight;
Li 2 O in an amount less than 0.5% by weight; and
TiO 2 in an amount from 0.0 to 1.5% by weight, expressed as percentages by weight based on the weight of the entire composition, wherein the combined amounts of SiO 2 , Al 2 O 3 , MgO, and CaO is between 98% by weight and 99.5% by weight, wherein said glass fiber has a fiberizing temperature no greater than 2375° F.

15. A glass fiber according to claim 14 , wherein said glass fiber has a tensile strength of at least 4,800 MPa.

16. A glass fiber according to claim 14 , wherein said glass fiber has a specific modulus of at least 32.0 MJ/kg.

17. A method of forming a continuous glass fiber comprising:
providing a molten composition according to claim 1 ; and
drawing said molten composition through an orifice to form a continuous glass fiber.

18. A reinforced composite product comprising;
a polymer matrix; and
a plurality of glass fibers formed from a glass composition comprising:
SiO 2 in an amount from 55.0 to 60.4% by weight;
Al 2 O 3 in an amount from 19.0 to 25.0% by weight;
CaO in an amount from 7 to 12.0% by weight;
MgO in an amount from 12.5 to 15.0% by weight;
Na 2 O in an amount from 0 to 1.0% by weight;
Li 2 O in an amount less than 0.5% by weight; and
TiO 2 in an amount from 0.0 to 1.5% by weight, expressed as percentages by weight based on the weight of the entire composition, wherein the combined amounts of SiO 2 , Al 2 O 3 , MgO, and CaO is between 98% by weight and 99.5% by weight, wherein said glass fibers have fiberizing temperatures no greater than 2,375° F.

19. A reinforced composite product according to claim 18 , wherein said reinforced composite product is in the form of a wind blade.

Assignees

• Owens Corning Intellectual Capital Llc

Inventors

• Mcginnis Peter Bernard
• Korwin-Edson Michelle

Classifications

• C08J5/043

  with glass fibres · CPC title

• C03C2213/00

  Glass fibres or filaments · CPC title

• C03B37/02

  by drawing or extruding, {e.g. direct drawing of molten glass from nozzles; Cooling fins therefor (C03B37/04 takes precedence; sizing of the fibres C03C25/00)} · CPC title

• C03C3/087 Primary

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

• F03D80/00

  Details, components or accessories not provided for in groups F03D1/00 - F03D17/00 · CPC title