Organo(poly)siloxane modified with phosphoric ester and process for producing the same

A phosphate-modified organo(poly)siloxane represented by the following formula (1):

• ##STR30## wherein:
• R, which may be the same or different, indicates an alkyl group or an alkoxy group having 1 to 22 carbon atoms;
• and
• R.sup.1 and R.sup.2 designate a group represented by the following formula (2') or (3'):
• ##STR31## wherein R.sup.4 and R.sup.6 designate an alkylene group having 2 to 4 carbon atoms;
• R.sup.5' indicates a linear or branched alkylene group having 1 to 50 carbon atoms;
• which may or may not contain hydroxy groups;
• M.sup.1 and M.sup.2 indicate a hydrogen atom, an alkali metal, an ammonium group, an alkyl amine or an alkanol amine;
• q is a number of 0 to 200;
• r is 0 or 1;
• or an alkyl group or an alkoxy group having 1 to 22 carbon atoms;
• provided that at least either one of R.sup.1 or R.sup.2 represents the group indicated by formula (2');
• and
• n indicates a number of 0 to 1000.

A process for preparing an organo(poly) siloxane having at least one group represented by the following formula as a group bonding to the silicon atoms in the molecular chain;

• ##STR32## wherein R.sup.4, R.sup.5', R.sup.6, q and r are the same as defined below;
• and M.sup.1 and M.sup.2 indicate a hydrogen atom, an alkali metal, an ammonium group, an alkyl amine or an alkanol amine;
• which comprises reacting an alcohol-modified organo(poly) siloxane having at least one group represented by formula HO--(R.sup.4 O).sub.q --R.sup.5' --OR.sup.6).sub.r --, wherein R.sup.4 and R.sup.6 represent an alkylene group having 2 to 4 carbon atoms;
• R.sup.5' indicates a linear or branched alkylene group having 1 to 50 carbon atoms, which may or may not contain hydroxy groups, q is a number of 0 to 200, and r is 0 or 1, as a group bonded to the silicon atoms in the molecular chain, with an oxyhalogenated phosphorus;
• and hydrolyzing the bonds between the phosphorus and the halogen.