← Back to Patent Explorer
US3915915A Expired / Lapsed US ⏱️ 0.0 years remaining

Flame proofing textile treating composition of tris(hydroxymethyl) phosphine-urea adduct and polyvinylbromide

Assignee: United States Department of Agriculture
•
Filing: 1972-06-23
•
Granted: 1975-10-28
•
Expires: 1992-06-23
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Textile treating compositions containing the elements phosphorus, nitrogen, and bromine and the processes for imparting flame resistance to organic fibrous materials using these elements. This is accomplished by impregnating the textile treating compositions consisting of (1) tris(hydroxymethyl)phosphine mixed with nitrogenous compounds containing at least two members of the group hydrogen and methylol radicals (-CH2OH) attached to trivalent nitrogen atoms, or (2) soluble methylol phosphine adducts which contain one or more methylol phosphine radicals (P-CH2OH) prepared by reacting tris(hydroxymethyl)phosphine with an amide or amine which contains one or more hydrogens attached to a trivalent nitrogen with an organic bromine containing material with at least 10% bromine in the form of bromine atoms attached to carbon atoms, in proportions selected so that phosphorus contained in structures of the group (-CH2)3P amounts to at least 3% of the total weight of the mixture, and heating to cause insolubilization in or on the fibrous structure.

Inventors

  • 👤 Darrell J Donaldson
  • 👤 Jr George L Drake
  • 👤 John V Beninate
  • 👤 Wilson A Reeves
  • 👤 Donald J Daigle

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 02:15
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 51 words
A PROCESS FOR PREPARING A FLAME RETARDANT CHEMICAL FORMULATION COMPRISING MIXING, AT ROOM TEMPERATURE IN AN AQUEOUS ETHANOL SOLVENT, A QUANTITY OF TRIS(HYDROXYMETHYL)PHOSPHINE-UREA 2:1 ADDUCT WITH SUFFICIENT QUANTITY OF POLYVINYLBROMIDE TO YIELD A SOLUTION CONTAINING AN ADDUCT TO POLYVINYLBROMIDE RATIO OF ABOUT 1 PART BY WEIGHT TO 2 PARTS BY WEIGHT.
Claim 2
Dependent Claim 51 words
A PROCESS FOR PREPARING A FLAME RETARDANT CHEMICAL FORMULATION COMPRISING MIXING, AT ROOM TEMPERATURE IN AN AQUEOUS ETHANOL SOLVENT, A QUANTITY OF TRIS(HYDROXYMETHYL)PHOSPHINE-UREA 2:1 ADDUCT WITH SUFFICIENT QUANTITY OF POLYVINYLBROMIDE TO YIELD A SOLUTION CONTAINING AN ADDUCT TO POLYVINYLBROMIDE RATIO OF ABOUT 1 PART BY WEIGHT TO 2 PARTS BY WEIGHT.
Claim 3
Dependent Claim 10 words
The chemical formulation produced by the process of claim 1.
Claim 4
Dependent Claim 26 words
The polymeric substance produced by heating the chemical formulation of claim 2 for about 1 hour at about 155*C and characterized by its black, hard consistency.

References Cited (Backward Citations)

US2519348A Cited
US2846413A Cited
US3054698A Cited
US3243391A Cited
US3732342A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-10-27 1979-04-28 1979-10-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-10-27 1983-04-28 1983-10-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-10-27 1987-04-28 1987-10-28 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag