Patent ID: 8691936

Claim:
A process for cationic copolymerization in the presence of an initiator comprising: i) feeding a monomer and a base to a mixing appliance, the monomer comprising trioxane; ii) feeding a protic acid in molar excess, based on the base, to the mixing appliance, wherein the protic acid reacts with the base in i) to form a salt such that excess protic acid is present as well as salt; iii) polymerizing the monomer in the presence of the initiator that comprises the protic acid and the salt; wherein the salt comprises the alkali metal or alkaline earth metal salts of protic acids and/or substituted ammonium salts of protic acids, wherein the cations of the ammonium salts have the general formula (I) where R 1 -R 4 are independently hydrogen, an alkyl group selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, and isobutyl, or an aryl group selected from the group consisting of phenyl and 4-methoxyphenyl.