Polyethylene glycol carbamates

Claim 1

A compound of the formula ##STR7## in which R is an alkyl having up to 4 carbon atoms, n has an verage value of at least 9, X is a radical of the formula --C(═O)--(NH--SO 2 ) m -- in which m is 0 or 1 and, if m is 1, the carbonyl group may be bonded to the oxygen atom or to the nitrogen atom, and each of the radicals A 1 , A 2 and A 3 has the same meaning and is hydrogen, or alkanoyl or alkenoyl each having upto and including 20 carbon atoms, alkoxycarbonyl having up to and including 20 carbon atoms in the alkyl moiety, oxaalkoxycarbonyl having up to and including 20 carbon atoms in the alkyl moiety and wherein up to and including methylene groups are replaced by oxygen atoms and in each case two carbon atoms separate the oxygen atoms from one another, alkylaminocarbonyl having up to and including 20 carbon atoms in the alkyl moiety, or substituted alkylaminocarconyl having up to and including 20 carbon atoms in the alkyl moiety and being substituted bycarboxy, lower alkoxycarbonyl having up to and including 4 carbon atoms in the lower alkyl moiety, carbamoyl and/or amino, hydroxy, mercapto, lower alkylthio having up to and including 4 carbon atoms, phenyl, or by hydroxyphenyl, or a pharmaceutically acceptable salt of a salt forming compound of formula I.