US4005034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(haloethyl-ethyleneoxy) phosphoric acid ester polymers as flame retardant agents
Assignee: Stauffer Chemical Co
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Filing: 1974-12-20
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Granted: 1977-01-25
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Expires: 1994-12-20
Abstract
Abstract Liquid poly(haloethyl-ethyleneoxy) phosphoric acid esters are prepared by condensing tris (2-haloethyl) phosphate at a temperature of from 140 DEG C. to 220 DEG C. in the presence of a catalyst until from about 0.5 to about 0.9 moles of ethylene dihalide per mole of tris(2-haloethyl) phosphate is evolved. A low acidity product is obtained. Any residual acidity in the product is substantially eliminated by neutralization with an alkylene oxide.
Inventors
- 👤 Edward D. Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C08G; C08G79/00; C08G79/02; C08G79/04; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08J2375/00; C08J2375/04; C08J2485/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A flame retardant composition comprising, in admixture, a polymeric material selected from the group consisting of polystyrene, polyolefines, vinyl polymers, rubber, nitrocellulose, epoxy resins, phenolic resins, acrylic resins, polyesters, cellulose acetate polymers, and polyurethane polymers in combination with liquid poly(chloroethylethyleneoxy) phosphoric acid esters which are prepared by reacting tris (2-chloroethyl) phosphate by heating said phosphate to a temperature within the range of from about 140° C. to about 220° C. in the presence of a basic catalyst with ethylene dichloride as reaction byproduct; and terminating said reaction at a reaction byproduct level of ethylene dichloride in an amount of from about 0.5 mole to about 0.9 mole ethylene dichloride per mole of tris(2-chloroethyl) phosphate in said reaction.
Claim 2
Dependent Claim
117 words
A flame retardant composition comprising, in admixture, a polymeric material selected from the group consisting of polystyrene, polyolefines, vinyl polymers, rubber, nitrocellulose, epoxy resins, phenolic resins, acrylic resins, polyesters, cellulose acetate polymers, and polyurethane polymers in combination with liquid poly(chloroethylethyleneoxy) phosphoric acid esters which are prepared by reacting tris (2-chloroethyl) phosphate by heating said phosphate to a temperature within the range of from about 140° C. to about 220° C. in the presence of a basic catalyst with ethylene dichloride as reaction byproduct; and terminating said reaction at a reaction byproduct level of ethylene dichloride in an amount of from about 0.5 mole to about 0.9 mole ethylene dichloride per mole of tris(2-chloroethyl) phosphate in said reaction.
Claim 3
Dependent Claim
16 words
The flame retardant composition as recited in claim 1 wherein said polymeric material is a polyurethane.
Claim 4
Dependent Claim
22 words
The flame retardant composition as recited in claim 2 wherein said polyurethane comprises the reaction product of a polyisocyanate and polyoxyalkylene glycol.
Claim 5
Dependent Claim
19 words
The flame retardant composition as recited in claim 3 wherein said polyurethane is in the form of a foam.
Claim 6
Dependent Claim
31 words
The flame retardant composition of claim 1 which further includes the step of post-treating the liquid poly(chloroethylethyleneoxy) phosphoric acid esters with an alkylene oxide to neutralize the acidity in said esters.
Claim 7
Dependent Claim
90 words
A flame retardant composition comprising, in admixture, a cellulose acetate polymer in combination with liquid poly(chloroethylethyleneoxy)phosphoric acid esters which are prepared by reacting tris(2-chloroethyl) phosphate by heating said phosphate to a temperature within the range of from about 140° C. to about 220° C. in the presence of a basic catalyst with ethylene dichloride as reaction byproduct; and terminating said reaction at a reaction byproduct level of ethylene dichloride in an amount of from about 0.5 mole to about 0.9 mole ethylene dichloride per mole of tris(2-chloroethyl)phosphate in said reaction.
Claim 8
Dependent Claim
90 words
A flame retardant composition comprising, in admixture, a cellulose acetate polymer in combination with liquid poly(chloroethylethyleneoxy)phosphoric acid esters which are prepared by reacting tris(2-chloroethyl) phosphate by heating said phosphate to a temperature within the range of from about 140° C. to about 220° C. in the presence of a basic catalyst with ethylene dichloride as reaction byproduct; and terminating said reaction at a reaction byproduct level of ethylene dichloride in an amount of from about 0.5 mole to about 0.9 mole ethylene dichloride per mole of tris(2-chloroethyl)phosphate in said reaction.
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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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |