| abstract |
Organosiloxane-polyamide block copolymers useful as additives to nylon products providing durable low energy surfaces exhibiting low coefficient of friction and as modified nylon exhibiting excellent bonding to glass are defined as block copolymers containing at least one polyamide block of two or more units of the general formula WHERE R is an alkylene radical of two to 15 carbon atoms and an organosiloxane block containing two or more units of the general formula R''aSiO(4 a/2) where a is 1, 2 or 3, and R'' is a hydrocarbyl or halogenohydrocarbyl of one to 18 carbon atoms or a divalent organic radical, at least one R'' being a divalent organic radical linking the siloxane block to the polyamide block. |