US4067744A
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Alkali-resistant glass composition and glass fibers made therefrom
Assignee: Kanebo Ltd
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Filing: 1976-07-16
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Granted: 1978-01-10
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Expires: 1996-07-16
Abstract
Abstract An alkali resistant glass composition and alkali resistant glass fibers composed of said glass composition which comprises }SiO2 61 - 69 mole% , }ZrO2 11.5 - 12.5 mole% , }CaO 2 - 5 mole% , }R2O 16 - 20 mole% , }K2O 2 - 5 mole% , }B2O3 1 - 4 mole% , }TiO2 0 - 0.3 mole% , and }MxOy 0 - 1 mole } WHEREIN R2O represents the total amount of Na2O and K2O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of M multiplied by x equals 2y; and the content of fluorides, calculated as F2, is 0 to 1 mole%, and meeting the following conditions, A. R2O + CaO >/= 19 mole%, B. ZrO2 + CaO + B2O3 </= 18.5 mole%, and C. the molar ratio of K2O/CaO >/= 0.5.
Inventors
- 👤 Koichiro Ohtomo
- 👤 Takuji Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:51
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C13/00; C03C13/001; C03C13/002; C03C4/00; C03C4/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
175 words
An alkali resistant glass composition consisting essentially of ______________________________________
SiO.sub.2 61 - 69 mole%,
ZrO.sub.2 11.5 - 12.5 mole%,
CaO 2 - 5 mole%,
R.sub.2 O 16 - 20 mole%,
K.sub.2 O 2 - 5 mole%,
B.sub.2 O.sub.3 1 - 4 mole%,
P.sub.2 O.sub.5 substantially O
TiO.sub.2 0 - 0.3 mole%, and
M.sub.x O.sub.y 0 - 1 mole%
______________________________________ wherein R 2 O represents the total amount of Na 2 O and K 2 O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of m multiplied by x equals 2y; and the content of fluorides, calculated as F 2 , is 0 to 1 mole%, and meeting the following conditions, A. r 2 o + caO ≧ 29 mole%, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole%, and C. the molar ratio of K 2 O/CaO ≧ 0.5.
Claim 2
Dependent Claim
175 words
An alkali resistant glass composition consisting essentially of ______________________________________
SiO.sub.2 61 - 69 mole%,
ZrO.sub.2 11.5 - 12.5 mole%,
CaO 2 - 5 mole%,
R.sub.2 O 16 - 20 mole%,
K.sub.2 O 2 - 5 mole%,
B.sub.2 O.sub.3 1 - 4 mole%,
P.sub.2 O.sub.5 substantially O
TiO.sub.2 0 - 0.3 mole%, and
M.sub.x O.sub.y 0 - 1 mole%
______________________________________ wherein R 2 O represents the total amount of Na 2 O and K 2 O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of m multiplied by x equals 2y; and the content of fluorides, calculated as F 2 , is 0 to 1 mole%, and meeting the following conditions, A. r 2 o + caO ≧ 29 mole%, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole%, and C. the molar ratio of K 2 O/CaO ≧ 0.5.
Claim 3
Dependent Claim
45 words
The composition of claim 1 wherein said oxides meet the following conditions, A'. r 2 o + caO ≧ 20 mole%, B'. zrO 2 + CaO + B 2 O 3 ≦ 1 mole%, and C'. the molar ratio of K 2 O/CaO ≧ 0.6.
Claim 4
Dependent Claim
180 words
Alkali resistant glass fibers composed of a glass composition consisting essentially of ______________________________________
SiO.sub.2 61 - 69 mole%,
ZrO.sub.2 11.5 - 12.5 mole%,
CaO 2 - 5 mole%,
R.sub.2 O 16 - 20 mole%,
K.sub.2 O 2 - 5 mole%,
B.sub.2 O.sub.3 1 - 4 mole%,
P.sub.2 O.sub.5 substantially O
TiO.sub.2 0 - 0.3 mole%, and
M.sub.x O.sub.y 0 - 1 mole%
______________________________________ wherein R 2 O represents the total amount of Na 2 O and K 2 O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of M multiplied by x equals 2y; and the content of fluorides, calculated as F 2 , is 0 to 1 mole%, and meeting the following conditions, A. r 2 o + caO ≧ 19 mole%, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole %, and C. the molar ratio of K 2 O/CaO ≧ 0.5.
Claim 5
Dependent Claim
180 words
Alkali resistant glass fibers composed of a glass composition consisting essentially of ______________________________________
SiO.sub.2 61 - 69 mole%,
ZrO.sub.2 11.5 - 12.5 mole%,
CaO 2 - 5 mole%,
R.sub.2 O 16 - 20 mole%,
K.sub.2 O 2 - 5 mole%,
B.sub.2 O.sub.3 1 - 4 mole%,
P.sub.2 O.sub.5 substantially O
TiO.sub.2 0 - 0.3 mole%, and
M.sub.x O.sub.y 0 - 1 mole%
______________________________________ wherein R 2 O represents the total amount of Na 2 O and K 2 O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of M multiplied by x equals 2y; and the content of fluorides, calculated as F 2 , is 0 to 1 mole%, and meeting the following conditions, A. r 2 o + caO ≧ 19 mole%, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole %, and C. the molar ratio of K 2 O/CaO ≧ 0.5.
Claim 6
Dependent Claim
46 words
The fibers of claim 3 wherein said oxides meet the following conditions, A'. r 2 o + caO ≧ 20 moles %, B'. zrO 2 + CaO + B 2 O 3 ≦ 18 mole%, and C'. the molar ratio of K 2 O/CaO ≧ 0.6.
Claim 7
Dependent Claim
45 words
The fibers of claim 3 wherein said oxides meet the following conditons, A". r 2 o + caO ≧ 21 mole%, B". zrO 2 + CaO + B 2 O 3 ≦ 18 mole%, and C". the molar ratio of K 2 O/CaO ≧ 0.6.
Claim 8
Dependent Claim
70 words
The fibers of claim 3 which contain the following oxides, ______________________________________
SiO.sub.2 63 - 67 mole %,
ZrO.sub.2 12 - 12.5 mole %,
CaO 3 - 4.5 mole %,
R.sub.2 O 17 - 19 mole %,
K.sub.2 O 2.5 - 4 mole %, and
B.sub.2 O.sub.3 1 - 2.5 mole %,
______________________________________ and meet the following condition, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole%.
Claim 9
Dependent Claim
45 words
The fibers of claim 6 wherein said oxides meet the following conditions, A". r 2 o + caO ≧ 21 mole%, B'. zrO 2 + CaO + B 2 O 3 ≦ 18 mole%, and C'. the molar ratio of K 2 O/CaO ≧ 0.6.
Claim 10
Dependent Claim
47 words
The fibers of claim 3 wherein said glass composition has a liquidus temperature (T L ) more than 30° C. below the spinning temperature (T F ) at which the glass viscosity is 1,000 poises, said spinning temperature (T F ) being not higher than 1,350° C.
Claim 11
Dependent Claim
47 words
The fibers of claim 3 wherein said glass composition has a lquidus temperature (T L ) more than 50° C. below the spinning temperature (T F ) at which the glass viscosity is 1,000 poises, said spinning temperature (T F ) being not higher than 1,320° C.
Claim 12
Dependent Claim
14 words
The fibers of claim 3 which have a diameter of 5 to 50 microns.
Claim 13
Dependent Claim
186 words
A cementitious product reinforced with alkali resistant fibers composed of a glass composition, aid glass composition consisting essentially of ______________________________________
SiO.sub.2 61 - 69 mole%,
ZrO.sub.2 11.5 - 12.5 mole%,
CaO 2 - 5 mole%,
R.sub.2 O 16 - 20 mole%,
K.sub.2 O 2 - 5 mole%,
B.sub.2 O.sub.3 1 - 4 mole%,
P.sub.2 O.sub.5 substantially O
TiO.sub.2 0 - 0.3 mole%, and
M.sub.x O.sub.y 0 - 1 mole%
______________________________________ wherein R 2 O represents the total amount of Na 2 O and K 2 O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of M multiplied by x equals 2y; and the content of fluorides, calculated as F 2 , is 0 to 1 mole%, and meeting the following conditions, A. r 2 o + caO ≧ 19 mole%, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole%, and C. the molar ratio of K 2 O/CaO ≧ 0.5.
Claim 14
Dependent Claim
186 words
A cementitious product reinforced with alkali resistant fibers composed of a glass composition, aid glass composition consisting essentially of ______________________________________
SiO.sub.2 61 - 69 mole%,
ZrO.sub.2 11.5 - 12.5 mole%,
CaO 2 - 5 mole%,
R.sub.2 O 16 - 20 mole%,
K.sub.2 O 2 - 5 mole%,
B.sub.2 O.sub.3 1 - 4 mole%,
P.sub.2 O.sub.5 substantially O
TiO.sub.2 0 - 0.3 mole%, and
M.sub.x O.sub.y 0 - 1 mole%
______________________________________ wherein R 2 O represents the total amount of Na 2 O and K 2 O; M is at least one metal selected from the group consisting of V, Cr, Mn, Fe, Co, Cu, Zn, As, Y, Mo, Cd, Sn, Sb, Hf and Ce; x and y are positive integers with the proviso that the valence of M multiplied by x equals 2y; and the content of fluorides, calculated as F 2 , is 0 to 1 mole%, and meeting the following conditions, A. r 2 o + caO ≧ 19 mole%, B. zrO 2 + CaO + B 2 O 3 ≦ 18.5 mole%, and C. the molar ratio of K 2 O/CaO ≧ 0.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |