Cyano-ether polyalkylsiloxane hydrides

A cyano-ether substituted polyalkylsiloxane hydride having an average composition within the formula, ##EQU43## wherein:

• R is alkyl having from one to 10 carbon atoms;
• Q is a cyano-bearing ether group having the formula, --(O).sub.q R'OR"CN, where q is zero or one, R' is bivalent alkylene having from 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms;
• t, u, v, w, the sum t+u and the sum v+w are independently zero or one, and each of the sums t+w and u+v is independently zero, one or two;
• x is zero or a positive number having an average value up to about 200;
• y has an average value from about 2 to about 100;
• and
• z has an average value from about 2 to about 30.

A cyano-ether substituted polyalkylsiloxane hydride having an average composition within the formula, ##EQU44## wherein:

• R is alkyl having from 1 to 10 carbon atoms;
• R' is bivalent alkylene of from 3 to 8 carbon atoms;
• R" is bivalent alkylene of from 2 to 4 carbon atoms;
• q is zero or one;
• x is zero or a positive number having an average value up to about 200;
• y has an average value from about 2 to about 100;
• and z has an average value from about 2 to about 30.

As a novel composition, a cyano-bearing polyalkylsiloxane hydride having the average composition, ##EQU45## wherein:

• R is alkyl having from one to four carbon atoms;
• R' is bivalent alkylene of 3 to 8 carbon atoms;
• R" is bivalent alkylene of 2 to 4 carbon atoms;
• q is zero or one;
• x is zero or a positive number having an average value up to about 20;
• y has an average value from about 2 to about 20;
• and z has an average value from about 2 to about 30.

As a novel composition, a cyano-bearing polyalkylsiloxane hydride having the average composition, ##EQU46## wherein:

• R is alkyl having from one to four carbon atoms;
• R' is bivalent alkylene of from 3 to 8 carbon atoms;
• R" is bivalent alkylene of from 2 to 4 carbon atoms;
• q is zero or one;
• x has an average value from about 10 to about 200;
• y has an average value from about 2 to about 100;
• and z has an average value from about 2 to about 30.

A cyanoethoxypropyl-substituted polymethyl-siloxane hydride having the average composition, ##EQU47## wherein:

• Me is methyl;
• x is zero or a positive number having an average value up to about 200;
• y has an average value from about 2 to about 100;
• and z has an average value from about 2 to about 30.

A cyanoethoxypropoxy-substituted polymethyl-siloxane hydride having the average composition, ##EQU48## wherein:

• Me is methyl;
• x is zero or a positive number having an average value up to about 200;
• y has an average value from about 2 to about 100;
• and z has an average value from about 2 to about 30.