Abstract: A method is described for preparing compounds of Formula I and Formula II: ##STR1## R.sub.1 is an alkyl group of one to twelve carbon atoms or a cycloalkyl group of five to eight carbons, X is chloro or hydrogen, and R.sub.2 is an alkoxy group having one to twelve carbons. In accordance with the method:(a) a bis(dialkylamino)methane is formed, preferably by reacting a dialkylamine of the formula HNR.sub.3 R.sub.4 (wherein R.sub.3 and R.sub.4 are independently alkyl groups having three or more carbons) and a solid formaldehyde material to produce the corresponding bis(dialkylamino)methane,(b) a monomer of Formula III or IV ##STR2## in which R.sub.1 is an alkyl group of one to twelve carbons or a cycloalkyl group of five to eight carbons, X is chloro or hydrogen and R.sub.