Patent US3943100A successfully refreshed from Google Patents.
US3943100A
Expired / Lapsed
US
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Nylon flame retardants based on certain organic acids
Assignee: Honeywell International Inc
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Filing: 1973-12-17
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Granted: 1976-03-09
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Expires: 1993-12-17
Abstract
Abstract A flame resistant organic polymer which decomposes into fragments containing acidic and/or basic groups and the process for making same comprising treating an organic polymer which decomposes into said fragments with from about 0.5 to about 25 weight percent of a compound which contains at least one functional radical selected from -0-, -S- and -N- and at least one carboxyl or mercapto group which is able to dissociate in water to provide a free positively charged ion.
Inventors
- 👤 Morris B. Berenbaum
- 👤 Kenneth B. Gilleo
- 👤 Francis E. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08K; C08K5/00; C08K5/0008; C08K5/0066; C08K5/04; C08K5/09; C08K5/092; C08K5/098; C08K5/13; C08K5/36; C08K5/37; D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/252; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A solid composition comprising a nylon polymer and from about 0.5 to about 25 weight percent of a flame retardant additive which is thiomalic acid, dimercaptosuccinic acid, gallic acid, citric acid or tartaric acid, or the ammonium, lithium or magnesium salts thereof.
Claim 2
Dependent Claim
42 words
A solid composition comprising a nylon polymer and from about 0.5 to about 25 weight percent of a flame retardant additive which is thiomalic acid, dimercaptosuccinic acid, gallic acid, citric acid or tartaric acid, or the ammonium, lithium or magnesium salts thereof.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the additive is the lithium salt of gallic acid.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the polymer contains between 2 and 16 weight percent of the additive.
Claim 5
Dependent Claim
48 words
A process for increasing the flame resistance of a nylon polymer which comprises adding to the polymer from about 0.5 to 25 weight percent of a compound which is thiomalic acid, dimercaptosuccinic acid, gallic acid, citric acid or tartaric acid, or the ammonium, lithium or magnesium salts thereof.
Claim 6
Dependent Claim
48 words
A process for increasing the flame resistance of a nylon polymer which comprises adding to the polymer from about 0.5 to 25 weight percent of a compound which is thiomalic acid, dimercaptosuccinic acid, gallic acid, citric acid or tartaric acid, or the ammonium, lithium or magnesium salts thereof.
Claim 7
Dependent Claim
30 words
The process of claim 4 wherein the compound is added to the nylon by wetting the nylon with an aqueous solution comprising 1 to 15 weight percent of the compound.
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |