Low temperature glass for insulation fiber
OwnerDiana Kim Fisler, Jon Frederick Bauerinventors
Life of this patent
Estimating the term…
Abstract
Glass fibers, particularly those prepared by flame attenuation, display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions used to make the fibers consisting essentially of: 38-52 wt % SiO2, 8-17 wt % A1203, 7-17 wt % B203, 0-7 wt % RO, wherein R is Ca, Mg, in a combination thereof, 20-31 wt R120, wherein R1 is Na, K, or a combination thereof, and 0-2.5 wt % Li20, and has a Final Aged Tensile Value of at least 3000; a HTV of 1700° F. or less and a liquidus temperature at least 200° F. lower than HTV.
Claims27
A glass fiber exhibiting good moisture resistance wherein said fiber is prepared from a glass composition consisting essentially of:
- 38-52 wt % Si02,
- 8-17 wt % A1203,
- 7-17 wt % B203,
- 0-7 wt % R0, wherein R is Ca, Mg, or a combination thereof,
- 20-31 wt % R120, wherein R1 is Na, K, or a combination thereof, and
- 0-2.5 wt % Li20
- and has a Final Aged Tensile value of at least 3000;
- a HTV of 1700° F. or less and a liquidus temperature at least 100° F. lower than the HTV.
A glass fiber exhibiting chemical resistance, moisture resistance, and biosolubility, wherein said fiber is prepared from a glass composition consisting essentially of:
- 40-52 wt % Si02,
- 8-15 wt % A1203,
- 8-15 wt % B203,
- 0-7 wt % R0, wherein R is Ca, Mg, or a combination thereof,
- 20-28 wt % R120, wherein R1 is Na, K, or a combination thereof, and
- 0-2.0 wt % Li20
- and has a Final Aged Tensile value of at least 3000;
- a HTV of 1700° F. or less and a liquidus temperature at least 100° F. lower than HTV.
A glass fiber exhibiting chemical resistance, moisture resistance, and biosolubility, wherein said fiber is prepared from a glass composition consisting essentially of:
- 41-49 wt % Si02,
- 8-12 wt % A1203,
- 10-15 wt % B203,
- 0-5 wt % R0, wherein R is Ca, Mg, or a combination thereof,
- 20-25 wt % R120, wherein R1 is Na, K, or a combination thereof, and
- 0-1,0 wt % Li20
- and has a Final Aged Tensile value of at least 3000;
- a HTV of 1700° F. or less and a liquidus temperature at least 100° F. lower than HTV.
A method for preparing glass fibers, which comprises contacting a primary with sufficient high temperature to create a loss of more volatile compounds of the glass composition from the outside of the primary to thereby create an outside shell which has a different composition than the fiber interior, wherein the primaries are prepared from a composition comprised of:
- 40-52 wt % Si02,
- 7-17 wt % A1203,
- 7-17 wt % B203,
- 0-7 wt % R0, wherein R is Ca, Mg, or a combination thereof,
- 20-31 wt % R120, wherein R1 is Na, K, or a combination thereof, and
- 0-2.5 wt % Li20
- wherein the glass fibers exhibit biodissolution in excess of 150 ng/cm2/hr,
- and has a Final Aged Tensile value of at least 3000;
- a HTV of 1700° F. or less and a liquidus temperature at least 100° F. lower than the HTV.
Dependencies are inferred from the claim text.