Procedure for preparing elastomeric polyphosphazene terpolimers. (Machine-translation by Google Translate, not legally binding)

摘要

Procedure for preparing chemically and thermally stable, high molecular weight, high molecular weight elastomeric polyphosphazene terpolymers with low glass transition temperatures and with randomly distributed recurring units of formulas: **(See formula)** where Y represents a monovalent radical selected from the group consisting of F (CF2) n (CH2) O - and H (CF2) n (CH2) O - and n is an integer from 1 to 4; Z represents a monovalent radical selected from the group consisting of F (CF2) m (CH2) O - and H (CF2) m (CH2) O - and m is an integer from n + 2 to n + 5; and containing small amounts of additional randomly distributed recurring units of formulas: **(See formula)** where Y and Z are defined as above and W represents a monovalent radical containing a group capable of further reacting at relatively moderate temperatures and the ratio (Y + Z): W is 5: 1; characterized in that it comprises the step of reacting a mixture of at least two different alkali metal fluoroalkoxides and generally a small percentage of another reactive alkoxide, with a soluble polymer of phosphonitrile chloride. (Machine-translation by Google Translate, not legally binding)