US4242316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfamic acid as a catalyst for the polymerization of chlorocyclophosphazenes
Assignee: BP Corp North America Inc
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Filing: 1979-06-29
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Granted: 1980-12-30
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Expires: 1999-06-29
Abstract
Abstract Polymerization process for the solution or bulk polymerization of chlorocyclophosphazenes using sulfamic acid compounds or derivatives of sulfamic acid as catalyst. Poly(aryloxyphosphazene) resulting therefrom can be controlled as to molecular weight, and molecular weight distribution.
Inventors
- 👤 David P. Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
157 words
A process for polymerization of chlorophosphazenes to produce a (Cl 2 PN) m polymer product having a controlled molecular weight and molecular weight range with controlled polydispersity in which m is 20 to 50,000 which process comprises polymerizing dichlorophosphazenes of the formula (Cl 2 PN) n in which n is 3 to 7 and wherein the (Cl 2 PN) moiety is present in a concentration of at least one mole per liter in the presence of between about 0.1 mmole to about 50 mmoles of a sulfamic acid compound per mole of (Cl 2 PN) moiety, said sulfamic acid compound being selected from the group consisting of sulfamic acid, sulfamic acid salts and nitrogen-substituted derivatives of sulfamic acid which are N-alkyl, N-dialkyl, N-alkyl and N-aryl, N-aryl and N-diaryl, wherein the alkyl moiety is 1 to 12 carbon atoms and the aryl moiety is selected from the group consisting of phenyl, naphthyl, anthracenyl, phenanthrenyl, benzothienyl and fluorenyl moieties.
Claim 2
Dependent Claim
157 words
A process for polymerization of chlorophosphazenes to produce a (Cl 2 PN) m polymer product having a controlled molecular weight and molecular weight range with controlled polydispersity in which m is 20 to 50,000 which process comprises polymerizing dichlorophosphazenes of the formula (Cl 2 PN) n in which n is 3 to 7 and wherein the (Cl 2 PN) moiety is present in a concentration of at least one mole per liter in the presence of between about 0.1 mmole to about 50 mmoles of a sulfamic acid compound per mole of (Cl 2 PN) moiety, said sulfamic acid compound being selected from the group consisting of sulfamic acid, sulfamic acid salts and nitrogen-substituted derivatives of sulfamic acid which are N-alkyl, N-dialkyl, N-alkyl and N-aryl, N-aryl and N-diaryl, wherein the alkyl moiety is 1 to 12 carbon atoms and the aryl moiety is selected from the group consisting of phenyl, naphthyl, anthracenyl, phenanthrenyl, benzothienyl and fluorenyl moieties.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein n comprises the whole numbers 3 and 4.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein the sulfamic acid compound is sulfamic acid.
Claim 5
Dependent Claim
13 words
The process of claim 2 wherein the said polydispersity is less than 6.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the said sulfamic acid compound is selected from the group consisting of sulfamic acid, ammonium sulfamate and N-phenyl sulfamic acid.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the said sulfamic acid compound is present within the range of from about 2 to about 2.0 mmoles per mole of (Cl 2 PN) moiety.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the said polydispersity is less than 10.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein the said polydispersity is greater than 10.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein the trimer to tetramer ratio is approximately 90:10.
Claim 11
Dependent Claim
25 words
The process of claim 1 wherein n consists essentially of the whole numbers 3 and 4 and the trimer to tetramer ratio is about 80:20.
Claim 12
Dependent Claim
21 words
The process of claim 1 wherein the said temperature is within the range from about 100° C. to about 350° C.
Claim 13
Dependent Claim
21 words
The process of claim 1 wherein the said temperature is within the range from about 125° C. to about 275° C.
References Cited (Backward Citations)
US4005171A
Cited
US4123503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |