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US4173671A
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Flame retardant carpet and method for preparing same
Assignee: Honeywell International Inc
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Filing: 1977-12-19
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Granted: 1979-11-06
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Expires: 1997-12-19
Abstract
Abstract Combinations of boric acid with certain dispersible or soluble metal salts, oxides and hydroxides, preferably also with certain hydrocarboxylic acids, provide unexpectedly enhanced flame retardancy to carpets, said flame retardancy being durable to usual carpet cleaning procedures. Such combinations may take the form of certain metal borocitrates or borotartrates.
Inventors
- 👤 Pritam S. Minhas
- 👤 Bernard Sukornick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:05
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/207; D06M11/00; D06M11/80; D06M11/82; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23986; Y10T428/23993
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
124 words
A flame-retardant carpet having a relatively pliable primary backing and a tufted surface, said surface being comprised of fibers selected from the group consisting of polyester and polyamide fibers, said carpet having from about 1 to about 15 weight percent of a composition added thereto, said composition comprising: (a) about 10 to about 80 weight percent of a polyvalent metal compound selected from the group consisting of the dispersible and soluble salts, oxides and hydroxides of aluminum, antimony and the alkaline earth metals; (b) about 5 to about 85 weight percent of boric acid; and (c) 0 to about 85 weight percent of a hydroxy carboxylic acid selected from the group consisting of maleic acid, citric acid, tartaric acid, gallic acid and 2,4-dihydroxybenzoic acid.
Claim 2
Dependent Claim
124 words
A flame-retardant carpet having a relatively pliable primary backing and a tufted surface, said surface being comprised of fibers selected from the group consisting of polyester and polyamide fibers, said carpet having from about 1 to about 15 weight percent of a composition added thereto, said composition comprising: (a) about 10 to about 80 weight percent of a polyvalent metal compound selected from the group consisting of the dispersible and soluble salts, oxides and hydroxides of aluminum, antimony and the alkaline earth metals; (b) about 5 to about 85 weight percent of boric acid; and (c) 0 to about 85 weight percent of a hydroxy carboxylic acid selected from the group consisting of maleic acid, citric acid, tartaric acid, gallic acid and 2,4-dihydroxybenzoic acid.
Claim 3
Dependent Claim
22 words
The flame retardant carpet of claim 1 wherein said composition comprises at least about 5 weight percent of said hydroxy carboxylic acid.
Claim 4
Dependent Claim
15 words
The flame retardant carpet of claim 2 wherein said polyvalent metal compound is antimony oxide.
Claim 5
Dependent Claim
30 words
The flame retardant carpet of claim 2 wherein said composition comprises about 30 to about 70 weight percent antimony oxide and about 30 to about 70 weight percent boric acid.
Claim 6
Dependent Claim
22 words
The flame retardant carpet of claim 2 where said composition includes about 20 to about 85 weight percent of said hydroxycarboxylic acid.
Claim 7
Dependent Claim
14 words
The flame retardant carpet of claim 2 where said hydroxycarboxylic acid is gallic acid.
Claim 8
Dependent Claim
14 words
The flame retardant carpet of claim 2 where said hydroxycarboxylic acid is maleic acid.
Claim 9
Dependent Claim
14 words
The flame retardant carpet of claim 2 where said hydroxycarboxylic acid is citric acid.
Claim 10
Dependent Claim
28 words
The flame retardant carpet of claim 8 where said boric and citric acids are present in substantially equimolar amounts and complexed as borocitric acid or a salt thereof.
Claim 11
Dependent Claim
25 words
The flame retardant carpet of claim 9 where said polyvalent metal compound is present in substantially equimolar amounts and complexed as a polyvalent metal borocitrate.
Claim 12
Dependent Claim
15 words
The flame retardant carpet of claim 10 where said polyvalent metal borocitrate is antimony borocitrate.
Claim 13
Dependent Claim
15 words
The flame retardant carpet of claim 10 where said polyvalent metal borocitrate is magnesium borocitrate.
Claim 14
Dependent Claim
14 words
The flame retardant carpet of claim 2 where said hydroxycarboxylic acid is tartaric acid.
Claim 15
Dependent Claim
28 words
The flame retardant carpet of claim 13 where said boric and tartaric acids are present in substantially equimolar amounts and complexed as borotartaric acid or a salt thereof.
Claim 16
Dependent Claim
25 words
The flame retardant carpet of claim 14 where said polyvalent metal compound is present in substantially equimolar amounts and complexed as a polyvalent metal borotartrate.
Claim 17
Dependent Claim
12 words
The flame retardant carpet of claim 1 where said fibers are polyamides.
Claim 18
Dependent Claim
12 words
The flame retardant carpet of claim 16 where said fibers are polycaprolactam.
Claim 19
Dependent Claim
12 words
The flame retardant carpet of claim 1 where said fibers are polyesters.
Claim 20
Independent Claim
133 words
A method of producing a carpet which comprises adding to the carpet from about 1 to about 15 weight percent of a composition comprising: (a) about 10 to about 80 weight percent of a polyvalent metal compound selected from the group consisting of the dispersible and soluble salts, oxides and hydroxides of aluminum, antimony and the alkaline earth metals; (b) about 5 to about 85 weight percent of boric acid; and (c) 0 to about 85 weight percent of a hydroxy carboxylic acid selected from the group consisting of maleic acid, citric acid, tartaric acid, gallic acid and 2,4-dihydroxybenzoic acid; and curing the carpet at a temperature of about 100° C. to about 150° C., whereby said carpet has improved flame retardancy and said flame retardancy has improved durability to carpet cleaning processes.
Claim 21
Independent Claim
133 words
A method of producing a carpet which comprises adding to the carpet from about 1 to about 15 weight percent of a composition comprising: (a) about 10 to about 80 weight percent of a polyvalent metal compound selected from the group consisting of the dispersible and soluble salts, oxides and hydroxides of aluminum, antimony and the alkaline earth metals; (b) about 5 to about 85 weight percent of boric acid; and (c) 0 to about 85 weight percent of a hydroxy carboxylic acid selected from the group consisting of maleic acid, citric acid, tartaric acid, gallic acid and 2,4-dihydroxybenzoic acid; and curing the carpet at a temperature of about 100° C. to about 150° C., whereby said carpet has improved flame retardancy and said flame retardancy has improved durability to carpet cleaning processes.
Claim 22
Dependent Claim
19 words
The method of claim 19 wherein said composition comprises at least 5 weight percent of said hydroxy carboxylic acid.
Claim 23
Dependent Claim
13 words
The method of claim 20 wherein said polyvalent metal compound is antimony oxide.
Claim 24
Dependent Claim
28 words
The method of claim 20 wherein said composition comprises about 30 to about 70 weight percent antimony oxide and about 30 to about 70 weight percent boric acid.
Claim 25
Dependent Claim
12 words
The method of claim 20 where said hydroxycarboxylic acid is gallic acid.
Claim 26
Dependent Claim
12 words
The method of claim 20 where said hydroxycarboxylic acid is maleic acid.
Claim 27
Dependent Claim
12 words
The method of claim 20 where said hydroxycarboxylic acid is citric acid.
Claim 28
Dependent Claim
23 words
The method of claim 25 where said boric acid and citric acid are present in substantially equimolar amounts and complexed as borocitric acid.
Claim 29
Dependent Claim
23 words
The method of claim 26 where said polyvalent metal compound is present in substantially equimolar amounts and complexed as a polyvalent metal borocitrate.
Claim 30
Dependent Claim
13 words
The method of claim 27 where said polyvalent metal borocitrate is antimony borocitrate.
Claim 31
Dependent Claim
12 words
The method of claim 20 where said hydroxycarboxylic acid is tartaric acid.
Claim 32
Dependent Claim
23 words
The method of claim 29 where said boric acid and tartaric acid are present in substantially equimolar amounts and complexed as borotartaric acid.
Claim 33
Dependent Claim
23 words
The method of claim 30 where said polyvalent metal compound is present in substantially equimolar amounts and complexed as a polyvalent metal borotartrate.
Claim 34
Dependent Claim
20 words
The method of claim 19 wherein said composition includes about 20 to about 85 weight percent of said hydroxycarboxylic acid.
Claim 35
Dependent Claim
12 words
The method of claim 19 where said carpet includes tufted polyamide fibers.
Claim 36
Dependent Claim
10 words
The process of claim 33 where said fibers are polycapralactam.
Claim 37
Dependent Claim
12 words
The process of claim 19 where said carpet inclues tufted polyester fibers.
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) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |