Cured phosphonitrilic elastomers having alkyl-substituted aryl u

Details Cured phosphonitrilic elastomers having alkyl-substituted aryl u Cured phosphonitrilic elastomers having alkyl-substituted aryl u

1990-09-24

1992-03-31

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525538, 528167, 528169, 528399, 528400, C08G 7902, C08F28300

Patent

active

051010020

ABSTRACT:
Phosphazene polymers having the units ##STR1## wherein the total number of units ranges from about 3 to about 50,000, R.sub.1 and R.sub.2 are different and are C.sub.1 to C.sub.12 linear or branched alkyl, C.sub.2 to C.sub.15 linear or branched fluoroalkyl or mixtures thereof, and R.sub.3 is phenyl substituted with C.sub.1 to C.sub.12 linear or branched alkyl. The polymers can be cured with peroxides to yield cross-linked materials having enhanced elongation.

REFERENCES:
patent: 3315688 (1967-04-01), Sbarra
patent: 3660165 (1972-05-01), Palmer
patent: 3700629 (1972-10-01), Reynard et al.
patent: 3702833 (1972-11-01), Rose et al.
patent: 3856712 (1974-12-01), Reynard et al.
patent: 3888800 (1975-06-01), Allcock
patent: 4116785 (1978-09-01), Cheng
G. L. Hagnauer et al., "Dilute Sol'n Char. Polyfluoroalkoxyphosphazenes" Journal of Polymer Science: vol. 10, 699-713 (1972).
G. Allen et al., "Polyphosphazenes: Part 1 Synthesis", p. 31, Dept. Chem. Univ. of Manchester.
"Phosphorous-Nitrogen Compounds", Academic Press, New York and London, 1972 by H. R. Allcock.
"Poly(organophosphazenes)", Chemtech, Sep. 19, 1975 by H. R. Allcock.

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