Elastomers prepared from N-(polyoxyalkyl)-N-(alkyl)amines

A process for the preparation of polyurea elastomers of polyurethane-urea elastomers which process comprises:

• reacting a amine mixture with an isocyanate in the presence of a chain extender wherein the amine mixture is of the general formula:
• ##STR14## wherein:
• R represents an initiator radical based on a compound containing Zerewitinoff active hydrogen atoms;
• H represents a hydroxy-containing group of the formula:
• ##STR15## P represents a primary amino-containing group of the formula:
• ##STR16## S represents a secondary amine-containing group of the formula:
• ##STR17## T represents a tertiary amine-containing group of the formula:
• ##STR18## a is 0 to 175;
• b is 0 to 175;
• c is 0 to 30;
• n is 1 to 3;
• the sum a+b+c must be greater than or equal to 2 when n equals 1;
• R' is an alkyl group containing from two carbon atoms to eighteen carbon atoms;
• R" is hydrogen or an alkyl group containing up to eighteen carbon atoms;
• R'" and R"" independently alkyl groups containing from two to twelve carbon atoms;
• h is from 0 to 0.3;
• p is from 0 to 0.4;
• s is from 0.7 to 1.0;
• t is from 0 to 0.05;
• (hz) is the product of h and z;
• p+s+t=1;
• z is 3 to 6;
• and
• where the equivalent weight of the amine is from about 1,000 to 10,000.