{TAIL ~ A process} 1 for the preparation of a substituted urethane, in which process a compound or {HEAD ~ polymer} of the formula: ##STR85## derived from a primary alcohol MOH is reacted with a compound comprising at least one amine group and at least one substituent selected from alcohol, thiol and carboxylic acid groups to produce the substituted urethane 
{ TAIL ~ A process } 1 for the preparation of a substituted urethane , in which process a compound or { HEAD ~ polymer } of the formula : # # STR85 # # derived from a primary alcohol MOH is reacted with a compound comprising at least one amine group and at least one substituent selected from alcohol , thiol and carboxylic acid groups to produce the substituted urethane
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