Oil-free elastomeric poly(aryloxyphosphazene) copolymer foam

Details Oil-free elastomeric poly(aryloxyphosphazene) copolymer foam Oil-free elastomeric poly(aryloxyphosphazene) copolymer foam

1979-04-16

1980-06-10

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

260 304N, 260 332R, 260 336R, 428379, 521 50, 528168, C08G 7902

Patent

active

042074037

ABSTRACT:
Poly(aryloxyphosphazene) copolymers are prepared having randomly repeating units represented by the formula: ##STR1## wherein R and R.sup.1 may be the same or different and are selected from the group consisting of monovalent aryl radicals and substituted aryl radicals having the structure: ##STR2## wherein X is a substituent selected from the group consisting of alkyl, alkoxy, aryl, aryloxy, amino and halogen substituted on any sterically permissible position on the phenyl group; and wherein the amount of Cl present in the form of P-Cl bonds is from about 0.4 percent to about 10 percent by weight based upon the total weight of copolymer.
The copolymers may contain minor proportions of randomly distributed units in addition to the repeating units described above, these additional units containing reactive sites enabling the properties of the copolymers to be modified by crosslinking and/or curing.
The copolymers are elastomeric even in the absence of low molecular weight polyphosphazene oils. The copolymers are curable by a variety of curing agents such as sulfur and peroxides, and can also be cured by radiation and ultraviolet light. The copolymers may be utilized in various applications such as foams and coatings, and are particularly suited for use in wire coating formulations.

REFERENCES:
patent: 3419504 (1968-12-01), Klender
patent: 3702833 (1972-11-01), Rose et al.
patent: 3970533 (1976-07-01), Kyker et al.

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