the polymerization of chloroprene leads to non - colored products when a mixture of 2 . 0 to 5 . 0 % by weight of a salt of disproportionated abietic acid and 0 . 1 to 1 . 0 % by weight , in each case relative to the total amount of monomer , of a compound of the formula ## str1 ## in which r 1 and r 2 , independently of one another , denote hydrogen or ch 3 , m denotes a number from 0 to 14 , n denotes a number from 0 to 13 , p denotes a number from 0 to 2 , and y denotes hydrogen , na or k , and the total number of aliphatic carbon atoms is 11 to 15 , is used as emulsifier , the emulsifiers having the advantage of being biologically degradable .