US3948820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable polyphosphazene copolymers and terpolymers
Assignee: Horizons Inc
•
Filing: 1974-08-07
•
Granted: 1976-04-06
•
Expires: 1994-08-07
Abstract
Abstract Copolymers and terpolymers comprising randomly repeating units represented by the general formulae ##EQU1## wherein the R' radicals contain OH functionality and R being at least one member of the group of monovalent radicals selected from alkyl, substituted alkyl, aryl, substituted aryl and arylalkyl, and R' is represented by ##EQU2## wherein Q represents either --(CH 2 ).sub. n or --C 6 H 4 X(CH 2 ).sub. m, the --X(CH 2 ).sub. m group being either meta or para and n is an integer from 1 to 6, m is an integer from 1 to 3, X is O or CH 2 , and R" is H or a lower alkyl radical with up to four carbon atoms (methyl, ethyl, etc.). The ratio of R to R' is between 99.5 to 0.5 and 65 to 35.
Inventors
- 👤 Kennard A. Reynard
- 👤 Selwyn H. Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:37
CPC Classifications
C; C08; C08L; C08L85/00; C08L85/02; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6461; C08G79/00; C08G79/02; C08G79/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
Polyphosphazenes having a degree of polymerization of 10 to 50,000 the skeletal chains of which comprise randomly repeating units represented by the general formulas ##EQU8## wherein each R is a monovalent radical selected from the group consisting of alkyl, substituted alkyl, fluoroalkyl, aryl, substituted aryl and arylalkyl and not every R in the polyphosphazene is required to be identical to every other R; and each R' is a monovalent group containing OH functionality and the ratio of R':R being between 0.5 to 99.5 and 35 to 65.
Claim 2
Dependent Claim
87 words
Polyphosphazenes having a degree of polymerization of 10 to 50,000 the skeletal chains of which comprise randomly repeating units represented by the general formulas ##EQU8## wherein each R is a monovalent radical selected from the group consisting of alkyl, substituted alkyl, fluoroalkyl, aryl, substituted aryl and arylalkyl and not every R in the polyphosphazene is required to be identical to every other R; and each R' is a monovalent group containing OH functionality and the ratio of R':R being between 0.5 to 99.5 and 35 to 65.
Claim 3
Dependent Claim
89 words
The polymers of claim 1 wherein R' is represented by the general formula ##EQU9## in which Q is selected from the group consisting of --(CH 2 ) n and --C 6 H 4 X(CH 2 ) m wherein the --X(CH 2 ) m group is meta or para, n is an integer from 1 to 6, m is an integer from 1 to 3, X is O or CH 2 , and R" is selected from the group consisting of H and alkyl with up to four carbon atoms.
Claim 4
Dependent Claim
30 words
A terpolymer according to claim 1 in which the randomly repeating units bonded to phosphorus comprise CF 3 CH 2 O--; C 3 F 7 CH 2 O-- and ##EQU10##
Claim 5
Dependent Claim
17 words
The polymers of claim 1 as curable compositions which can be crosslinked at room temperature or above.
Claim 6
Dependent Claim
10 words
A cured polyphosphazene of claim 1, cured with a polyisocyanate.
Claim 7
Dependent Claim
10 words
A cured polyphosphazene of claim 1, cured with a polyanhydride.
Claim 8
Dependent Claim
14 words
The polyphosphazenes of claim 1 in which R is CF 3 CH 2 --.
Claim 9
Dependent Claim
43 words
The polyphosphazenes of claim 1 in which R is selected from the group which is comprised of --CH 2 (CF 2 ).sub. m F and --CH 2 (CF 2 ).sub. p H groups where m and p are integers from 1 to 8.
Claim 10
Dependent Claim
23 words
The polyphosphazenes of claim 1 in which up to 35 mole percent of the groups attached to the P atoms contain --OH functionality.
Claim 11
Dependent Claim
43 words
A process for the preparation of the polymers of claim 1 which comprises the reaction of poly(dichlorophosphazene) with the alkali salt or salts of ROH and the alkali salt of ##EQU11## R, Q, and R" being as defined in claims 1 and 2.
Claim 12
Dependent Claim
54 words
A process for the preparation of soluble polymers of claim 1 which comprises the reaction of a polymer which contains the units ##EQU12## where not every R is required to be identical to every other R with the alkali salt of ##EQU13## R, Q, and R" being as defined in claims 1 and 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |