Organopolysiloxanes containing acyl thiourea groups, methods of their preparation and use

Claim 1

An organopolysiloxane containing acyl thiourea groups and composed of recurring units of the formula: ##STR24## whereby R 1 represents a phenyl group, or a phenyl group substituted with an NO 2 group, or an alkyl group with 1 to 3 C atoms, R 2 and R 3 represent units of formula (2): R.sup.4 --SiO.sub.3/2 (2) in which R 4 represents an alkylene group with 1 to 10 C atoms or a cycloalkylene group with 5 to 8 C atoms or represents a unit of the formulae: ##STR25## wherein n is from 1 to 6 and the free valences of the oxygen atoms in formula (2) are saturated by (a) silicon atoms of further groups of formula (2) or by (b) silicon atoms of amine units according to formula (3), or mixtures of (a) and (b): ##STR26## in which R 2 and R 3 have the same meaning as in formula (2) and can be the same or different, R 5 represents H or has the same meaning as R 2 or R 3 , or by (c) cross-linking binding links SiO.sub.4/2, R'SiO.sub.3/2, R.sub.2 'SiO.sub.2/2 TiO.sub.4/2, R'TiO.sub.3/2, R.sub.2 'TiO.sub.2/2 AlO.sub.3/2, R'AlO.sub.2/2, or mixtures of (a), (b) and (c) wherein R' represents a methyl or ethyl group and the ratio of the silicon atoms in formulae (1) and (3) to the binding links silicon, titanium, aluminum is 1:0 to 1:10.