US4154890A
Expired / Lapsed
US
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Process for imparting flame retardant property to cellulosic containing materials
Assignee: Occidental Chemical Corp
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Filing: 1977-01-29
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Granted: 1979-05-15
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Expires: 1997-01-29
Abstract
Abstract A process for imparting flame retardant property to cellulosic containing materials comprising the steps; (1) TREATING THE CELLULOSIC CONTAINING MATERIAL WITH A SOLUTION CONTAINING POLY (HYDROXY ORGANO) PHOSPHONIUM CATION; (2) EXPOSING THE TREATED CELLULOSIC MATERIAL TO AN ATMOSPHERE CONTAINING AMMONIA TO POLYMERIZE THE PHOSPHONIUM COMPOUND; (3) TREATING THE CELLULOSIC MATERIAL CONTAINING THE POLYMERIZED PHOSPHONIUM COMPOUND WITH A SOLUTION CONTAINING A POLY (HYDROXY ORGANO) PHOSPHONIUM SALT AND A NITROGEN CONTAINING COMPOUND COPOLYMERIZABLE WITH SAID PHOSPHONIUM HALIDE; AND P1 (4) HEAT CURING THE PHOSPHONIUM SALT COMPOSITION.
Inventors
- 👤 George M. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:20
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673; D06M13/00; D06M13/244; D06M13/282; D06M13/322; D06M13/46; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A process for imparting flame retardant property to cellulose containing textile materials comprising the steps: (1) treating the cellulosic containing material with a solution containing poly (hydroxyorgano) phosphonium cation; (2) exposing the treated cellulosic material to an atmosphere containing ammonia to polymerize the phosphonium compound; (3) treating the cellulosic material containing polymerized phosphonium compound with a solution containing a tetrakis (alpha-hydroxyorgano) phosphonium salt and a nitrogen containing compound copolymerizable with said phosphonium salt, and (4) heating the thus treated cellulosic material to cure substantially all the phosphonium salt composition thereof.
Claim 2
Dependent Claim
90 words
A process for imparting flame retardant property to cellulose containing textile materials comprising the steps: (1) treating the cellulosic containing material with a solution containing poly (hydroxyorgano) phosphonium cation; (2) exposing the treated cellulosic material to an atmosphere containing ammonia to polymerize the phosphonium compound; (3) treating the cellulosic material containing polymerized phosphonium compound with a solution containing a tetrakis (alpha-hydroxyorgano) phosphonium salt and a nitrogen containing compound copolymerizable with said phosphonium salt, and (4) heating the thus treated cellulosic material to cure substantially all the phosphonium salt composition thereof.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein the phosphonium cation is present in the solution in an amount ranging from 10% to about 40% by weight; the phosphonium salt is present in an amount ranging from about 5% to about 20% by weight.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the cellulosic material contains at least 20% by weight of a polyester material.
Claim 5
Dependent Claim
20 words
The process of claim 2 wherein the phosphorous compounds are tetrakis (hydroxymethyl) phosphonium cation for steps 1 and 3 respectively.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein the solutions in steps 1 and 3 are aqueous solutions.
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein the phosphonium salt of Step 2 is cured by heating the treated material to a temperature between about 100° Centigrade to about 700° Centigrade.
Claim 8
Dependent Claim
20 words
The process of claim 1, wherein the phosphonium cation solution has a pH ranging from about 2 to about 9.
Claim 9
Dependent Claim
49 words
The process of claim 1 wherein the phosphonium salt solution of Step 2 is comprised of the following compositions: ______________________________________
parts by weight
______________________________________
phosphonium salt 10% to 40%
a nitrogen containing compound
copolymerizable with the
phosphonium salt 5% to 15%
carbamic acid derivative
1%-10%
water remaining portion
______________________________________
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein the total resin add-on ranges from about 15 to about 35% by weight.
Claim 11
Dependent Claim
12 words
A composition of matter treated according to the process of claim 1.
Claim 12
Dependent Claim
12 words
A composition of matter treated according to the process of claim 4.
References Cited (Backward Citations)
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US3310419A
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US3310420A
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US3607356A
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US3775155A
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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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |