US4123416A
Expired / Lapsed
US
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Curable composition comprising a calcium fluoro-alumino silicate glass and poly(carboxylic acid) or precursor thereof
Assignee: Smith and Nephew Research Ltd
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Filing: 1976-05-11
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Granted: 1978-10-31
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Expires: 1996-05-11
Abstract
Abstract A novel calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine (preferably 4-7%) can be associated with a poly(carboxylic acid) e.g. as an intimate mixture of glass and acid to constitute a composition curable on contact with water and useful, for example, as a loading on a splinting bandage. Such a bandage preferably has a ratio of set time to gel time from 4:1 to 8:1 with a minimum gel time of 60 seconds.
Inventors
- 👤 William D. Potter
- 👤 Andrew C. Barclay
- 👤 Reginald Dunning
- 👤 Richard J. Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/28; A; A61; A61L; A61L15/00; A61L15/07; A61L15/12; C03; C03C; C03C12/00; C03C3/00; C03C3/04; C03C3/062; C03C4/00; C03C4/0035; Y; Y10; Y10S; Y10S526/00; Y10S526/936; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
75 words
A curable composition comprising a calcium fluoroaluminosilicate glass in particulate form and consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and an effective amount up to 9% by weight fluorine; together with a crosslinkable material chosen from the group consisting of poly(carboxylic acids) and polymeric precursors thereof.
Claim 2
Dependent Claim
75 words
A curable composition comprising a calcium fluoroaluminosilicate glass in particulate form and consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and an effective amount up to 9% by weight fluorine; together with a crosslinkable material chosen from the group consisting of poly(carboxylic acids) and polymeric precursors thereof.
Claim 3
Dependent Claim
17 words
A curable composition as claimed in claim 1 wherein the polymeric precursor is a poly(carboxylic acid anhydride).
Claim 4
Dependent Claim
72 words
A curable composition as claimed in claim 1 wherein the same polymer is a homopolymer of an unsaturated compound chosen from the group consisting of (a) monocarboxylic acid (b) monocarboxylic acid anhydride (c) dicarboxylic acid (d) dicarboxylic acid anhydride; (e) copolymers between at least two of (a) (b) (c) and (d); and (f) copolymers between at least one of (a) (b) (c) and (d) and at least one further ethylenically unsaturated monomer.
Claim 5
Dependent Claim
24 words
A curable composition as claimed in claim 3 in which the compound is chosen from acrylic, itaconic, mesaconic, citraconic, and maleic acids or anhydrides.
Claim 6
Dependent Claim
21 words
A curable composition as claimed in claim 4 in which the said copolymer is between acrylic acid and acrylamide or acrylonitrile.
Claim 7
Dependent Claim
20 words
A curable composition as claimed in claim 4 wherein the said copolymer is between maleic acid and methyl vinyl ether.
Claim 8
Dependent Claim
35 words
A curable composition as claimed in claim 4 in which the said copolymer is between one of said anhydrides and an ethylenically unsaturated material chosen from the group consisting of ethylene, propylene, butene and styrene.
Claim 9
Dependent Claim
19 words
A curable composition as claimed in claim 7 in which the said copolymer is between maleic anhydride and ethylene.
Claim 10
Dependent Claim
19 words
A curable composition as claimed in claim 1 in which the polymer molecular weight is from 1,000 to 1,000,000.
Claim 11
Dependent Claim
19 words
A curable composition as claimed in claim 9 in which the said molecular weight is from 50,000 to 500,000.
Claim 12
Dependent Claim
25 words
A curable composition as claimed in claim 1 formulated as a two-part package of (a) the said particulate glass and (b) the said crosslinkable material.
Claim 13
Dependent Claim
20 words
A curable composition as claimed in claim 11 in which the crosslinkable polymeric material is a polyacid in aqueous solution.
Claim 14
Dependent Claim
24 words
A curable composition as claimed in claim 1 in the form of a mixture of the particulate glass and solid particulate crosslinkable polymeric material.
Claim 15
Dependent Claim
19 words
A curable composition as claimed in claim 13 in which the glass:polymer weight ratio is from 0.5:1 to 5:1.
Claim 16
Dependent Claim
17 words
A curable composition as claimed in claim 14 wherein the said ratio is from 1.5:1 to 4.5:1.
Claim 17
Dependent Claim
19 words
A curable composition as claimed in claim 13 in which the acid has a particle size below 100 microns.
Claim 18
Dependent Claim
17 words
A curable composition as claimed in claim 13 having a gel time of 60 to 300 seconds.
Claim 19
Dependent Claim
19 words
A curable composition as claimed in claim 17 wherein the said gel time is from 90 to 180 seconds.
Claim 20
Dependent Claim
19 words
A curable composition as claimed in claim 18 wherein the said gel time is from 110 to 150 seconds.
Claim 21
Dependent Claim
17 words
A curable composition as claimed in claim 13 having a set time of up to 20 minutes.
Claim 22
Dependent Claim
17 words
A curable composition as claimed in claim 20 having a set time of 5 to 15 minutes.
Claim 23
Dependent Claim
29 words
A curable composition as claimed in claim 13 wherein the ratio of set time to gel time is from 4:1 to 8:1 and minimum gel time is 60 seconds.
Claim 24
Dependent Claim
27 words
A curable composition as claimed in claim 13 further comprising an acid chosen from the group consisting of organic polycarboxylic and hydroxycarboxylic acids, in dry particulate form.
Claim 25
Dependent Claim
28 words
A curable composition as claimed in claim 23 in which from 5 to 15% by weight of the said acid is present, based on weight of polymeric material.
Claim 26
Dependent Claim
29 words
A curable composition as claimed in claim 23 in which the said acid is chosen from the group consisting of tartaric, succinic, oxalic, citric, ascorbic, gluconic and adipic acids.
Claim 27
Dependent Claim
13 words
A curable composition as claimed in claim 13 further comprising a particulate filler.
Claim 28
Dependent Claim
17 words
A curable composition as claimed in claim 26 wherein the filler is chosen from silica and alumina.
Claim 29
Dependent Claim
16 words
A curable composition as claimed in claim 13 further comprising a particulate watersoluble inorganic crystalline material.
Claim 30
Dependent Claim
32 words
A curable composition as claimed in claim 28 wherein said material is a salt of a strong acid and a metal chosen from the group consisting of alkali and alkaline earth metals.
Claim 31
Dependent Claim
22 words
A curable composition as claimed in claim 29 wherein the said material is a salt of an alkali metal and hydrochloric acid.
Claim 32
Dependent Claim
14 words
A curable composition as claimed in claim 30 wherein the salt is sodium chloride.
Claim 33
Dependent Claim
29 words
A curable composition as claimed in claim 28 wherein from 2.5 to 10.0% by weight of said inorganic crystalline material is present, based on total glass and polymer content.
Claim 34
Dependent Claim
19 words
A curable composition according to claim 1 wherein the calcium fluoroaluminosilicate glass has up to 7% by weight fluorine.
Claim 35
Dependent Claim
20 words
A curable composition according to claim 33 wherein the calcium fluoroaluminosilicate glass has between 4 and 7% by weight fluorine.
Claim 36
Dependent Claim
22 words
A curable composition according to claim 33 wherein the calcium fluoroaluminosilicate glass has a fluorine content of 4.5 to 6.0 weight percent.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |