US4835122A
Expired / Lapsed
US
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Glass fibers resistant to basic media and their application to reinforcing of cement
Assignee: Saint Gobain Adfors SAS
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Filing: 1986-01-28
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Granted: 1989-05-30
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Expires: 2006-01-28
Abstract
Abstract The invention relates to glass fiber compositions and fibers having use as a reinforcement element of cement-base products. As such, the composition is able to resist attack of strongly basic media. The fibers of the invention comprise the following constituents, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, and wherein the sum of Na 2 O and K 2 O is between 14 and 22%, and wherein the sum of SiO 2 and Al 2 O 3 is less than 70%.
Inventors
- 👤 Marie-Helene Chopinet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:55
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/001; C03C13/002
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
A continuous glass fiber consisting essentially of, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22%, and the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%.
Claim 2
Dependent Claim
76 words
A continuous glass fiber consisting essentially of, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22%, and the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%.
Claim 3
Dependent Claim
30 words
The glass fiber of claim 1 wherein the percentage of SiO 2 is between 58 and 66%, and the percentage of Al 2 O 3 is between 1 and 7.5%.
Claim 4
Dependent Claim
27 words
The glass fiber of claim 2 wherein the sum of the proportions of SiO 2 and Al 2 O 3 is no more than equal to 68%.
Claim 5
Dependent Claim
35 words
The glass fiber of claim 1, 2 or 3 wherein the percentage of Na 2 O is between 13 and 19% and the percentage of K 2 O is less than or equal to 6%.
Claim 6
Dependent Claim
25 words
The glass fiber of claim 4 wherein the sum of the proportions of Na 2 O and K 2 O is between 15 and 20%.
Claim 7
Dependent Claim
43 words
The glass fiber of claim 1, 2 or 3 consisting essentially of, in proportions by weight: SiO 2 --58 to 66%, ZrO 2 --15 to 16%, Na 2 O--13 to 19%, K 2 O--0 to 6%, Al 2 O 3 --1 to 7%.
Claim 8
Dependent Claim
76 words
A continuous glass fiber consisting essentially of, in proportions by weight: SiO 2 --58 to 66%, ZrO 2 --15 to 16%, Na 2 O--13 to 19%, K 2 O--0 to 6%, Al 2 O 3 --1 to 7%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22% and the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%.
Claim 9
Dependent Claim
76 words
A continuous glass fiber consisting essentially of, in proportions by weight: SiO 2 --58 to 66%, ZrO 2 --15 to 16%, Na 2 O--13 to 19%, K 2 O--0 to 6%, Al 2 O 3 --1 to 7%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22% and the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%.
Claim 10
Dependent Claim
24 words
The glass fiber of claim 7 wherein the sum of SiO 2 and Al 2 O 3 is no more than equal to 68%.
Claim 11
Dependent Claim
22 words
The glass fiber of claim 8 wherein the sum of Na 2 O and K 2 O is between 15 and 20%.
Claim 12
Dependent Claim
91 words
A glass fiber reinforced cement-based product wherein at least a portion of said reinforcing fibers are continuous glass fibers consisting essentially of, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22% and the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%.
Claim 13
Dependent Claim
91 words
A glass fiber reinforced cement-based product wherein at least a portion of said reinforcing fibers are continuous glass fibers consisting essentially of, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22% and the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%.
Claim 14
Dependent Claim
110 words
A glass fiber consisting essentially of, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22%, the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%, and the difference between a temperature corresponding to log n=2.5 and an upper devitrification temperature is at least about 80° C. and a drawing temperature, corresponding to log n=2.8, is less than or equal to 1480° C.
Claim 15
Dependent Claim
110 words
A glass fiber consisting essentially of, in proportions by weight: SiO 2 --56 to 68%, ZrO 2 --14 to 17%, Na 2 O--12 to 20%, K 2 O--0 to 8%, Al 2 O 3 --1 to 9%, wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22%, the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%, and the difference between a temperature corresponding to log n=2.5 and an upper devitrification temperature is at least about 80° C. and a drawing temperature, corresponding to log n=2.8, is less than or equal to 1480° C.
Claim 16
Dependent Claim
49 words
The fiber of claim 11 wherein the proportion of SiO 2 is between 58 and 66% the proportion of Al 2 O 3 is between 1 and 7.5%, and the sum of the proportions of SiO 2 and Al 2 O 3 is less than or equal to 68%.
Claim 17
Dependent Claim
51 words
The fiber of claim 11 wherein the proportion of Na 2 O is between 13 and 19% the proportion of K 2 O is less than or equal to 6%, and the sum of the proportions of Na 2 O and K 2 O is between 15 and 20% by weight.
Claim 18
Dependent Claim
112 words
A continuous glass fiber consisting essentially of, in proportions by weight: SiO 2 --58 to 66%, ZrO 2 --15 to 16%, Na 2 O--13 to 19%, K 2 O--0 to 6%, Al 2 O 3 --1 to 7%, wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22%, the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%, and the difference between a temperature corresponding to log n=2.5 and an upper devitification temperature is at least about 80° C., and wherein a drawing temperature corresponding to log n=2.8 is less than or equal to 1480° C.
Claim 19
Dependent Claim
112 words
A continuous glass fiber consisting essentially of, in proportions by weight: SiO 2 --58 to 66%, ZrO 2 --15 to 16%, Na 2 O--13 to 19%, K 2 O--0 to 6%, Al 2 O 3 --1 to 7%, wherein the sum of the proportions of Na 2 O and K 2 O is between 14 and 22%, the sum of the proportions of SiO 2 and Al 2 O 3 is less than 70%, and the difference between a temperature corresponding to log n=2.5 and an upper devitification temperature is at least about 80° C., and wherein a drawing temperature corresponding to log n=2.8 is less than or equal to 1480° C.
Claim 20
Dependent Claim
48 words
The fiber of claim 14 wherein the sum of the proportions of SiO 2 and Al 2 O 3 is less than or equal to 68%, and wherein the sum of the proportions of Na 2 O and K 2 O is between 15 and 20% by weight.
Claim 21
Dependent Claim
30 words
A glass fiber reinforced cement-based product wherein at least a portion of said reinforcing fibers are the glass fibers of one of claims 9, 10, 7-9 or 11 through 15.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |