Patent US4071501A successfully refreshed from Google Patents.
US4071501A
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Water soluble adduct of hydroxymethyl phosphorous compound and ammonia or amine compound and method of preparation
Assignee: United States Department of Agriculture
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Filing: 1976-01-14
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Granted: 1978-01-31
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Expires: 1996-01-14
Abstract
Abstract Soluble adduct polymers were allowed to react with phenol, alkyl substituted phenols or halogen substituted phenols which contain one or more hydrogens ortho or para to the phenolic hydroxyl group to (a) prepare flame resistant polymers and (b) prepare flame-, glow-, wrinkle- and shrink-resistant woven and knit textiles which contain 25% or more cellulosic fibers.
Inventors
- 👤 Armand B. Pepperman, Jr.
- 👤 Donald J. Daigle
- 👤 Sidney L. Vail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:38
CPC Classifications
C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G8/00; C08G8/38; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A process for preparing a water soluble adduct polymer comprising: a. reacting a hydroxymethyl phosphorus compound selected from the group consisting of tris(hydroxymethyl)phosphine and tetrakis (hydroxymethyl) phosphonium hydroxide with a nitrogenous compound selected from the group consisting of ammonia, hexamethylenetetramine, ethylenediamine and 1,6-hexamethylene diamine at a mole ratio of 1:4 to 4:1 of amine to phosphorus compound to form an insoluble polymeric precipitate; and b. dissolving the precipitate from (a) in the presence of formaldehyde and an inorganic or organic acid with a mole ratio of 1:4 to 4:1 of formaldehyde to phosphorus contained in the precipitate and a 1:10 to 2:1 ratio of acid to phosphorus contained in the precipitate.
Claim 2
Dependent Claim
111 words
A process for preparing a water soluble adduct polymer comprising: a. reacting a hydroxymethyl phosphorus compound selected from the group consisting of tris(hydroxymethyl)phosphine and tetrakis (hydroxymethyl) phosphonium hydroxide with a nitrogenous compound selected from the group consisting of ammonia, hexamethylenetetramine, ethylenediamine and 1,6-hexamethylene diamine at a mole ratio of 1:4 to 4:1 of amine to phosphorus compound to form an insoluble polymeric precipitate; and b. dissolving the precipitate from (a) in the presence of formaldehyde and an inorganic or organic acid with a mole ratio of 1:4 to 4:1 of formaldehyde to phosphorus contained in the precipitate and a 1:10 to 2:1 ratio of acid to phosphorus contained in the precipitate.
Claim 3
Dependent Claim
9 words
The product produced by the process of claim 1.
References Cited (Backward Citations)
US3425992A
Cited
US3520849A
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US3655586A
Cited
US3703392A
Cited
US3953165A
Cited
US3953166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |