Abstract: A polymer additive for alkaline zinc and zinc alloy electrodepositing media and processes comprises the reaction product of one or both of (i) a first di-tertiary amine of the formula:  where R′ represents  and q is 2 to 6, R represents CH3 or C2H5 and each R may be the same or different and m is 2 to 4, and a second di-tertiary amine of the formula:  where B is CgH2g+1 and g=0 or an integer the respective B groups being the same or different, and f=0 o an integer, and R″ represents CH3 or C2H5 and each R″ may be the same or different, with (ii) a di-halo alkane of the formula: A—(CH2)n—A where A represents a halogen atom and n is at least 2. The resulting polymer preferably has the general structure: Where: 0≦x≦1 0≦y≦1 and: either (x or y) or (x and y)=1 z is at least 2 and when y=0, n is at least 3.