OIL-FREE ELASTOMERIC POLY(ARYLOXYPHOSPHAZENE) COPOLYMERS AND THEIR METHOD OF PREPARATION

摘要

Poly(aryloxyphosphazene) copolymers are prepared having randomly repeating units represented by the formula: wherein R and R1 may be the same or different and are selected from the group consisting of monovalent aryl radicals and substituted aryl radicals having the structure: 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 C1 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.