US3943100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nylon flame retardants based on certain organic acids
Assignee: Honeywell International Inc
•
Filing: 1973-12-17
•
Granted: 1976-03-09
•
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 07:56
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.
References Cited (Backward Citations)
US3087900A
Cited
US3179625A
Cited
US3293196A
Cited
US3187377A
Cited
US3298995A
Cited
US3497457A
Cited
US3487122A
Cited
US3531423A
Cited
US3637542A
Cited
US3798198A
Cited
US3755214A
Cited
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 |