Patent ID: 8779012

Claim:
A demulsifying composition comprising an oil phase, and aqueous phase and a demulsifying-effective amount of at least one polyorganosiloxane compound having the general formula (I): M 1 a M 2 b D 1 c D 2 d T 1 e T 2 f Q g (I) wherein: M 1 =R 1 R 2 R 3 SiO 1/2 , M 2 =R 4 R 5 R L SiO 1/2 , D 1 =R 6 R 7 SiO 2/2 , D 2 =R 8 R L SiO 2/2 , T 1 =R 9 SiO 3/2 , T 2 =R L SiO 3/2 , Q=SiO 4/2 , where R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 are each independently chosen from monovalent alkyl, aryl or aralkyl hydrocarbon radicals containing 1 to 60 carbon atoms, optionally containing at least one heteroatom, or at least one monovalent polyether radical having the general formula R P ; R P is a monovalent polyether radical independently of the general formula (II): —(C n H 2n )—O—(C 2 H 4 O) o —(C 3 H 6 O) P —(C 4 H 8 O) q —R 10 (II) where R 10 is hydrogen or a monovalent alkyl radical containing from 1 to about 20 carbon atoms or an acyl group; subscripts a, b, c, d, e, f and g are zero or positive integers, subject to the limitations: 2≦a+b+c+d+e+f+g≦500, b+d+f+≧1 and a+b=2+e+f+2g; subscript n is 2 to about 10; subscript o is 0 to about 200; subscript p is 0 to about 200; subscript q is 0 to about 200; and, subject to the limitation o+p+q≧1; R L is a monovalent radical independently chosen from the general formula (III): —X—O—(C 2 H 4 O) r —(C 3 H 6 O) s —(C 4 H 8 O) t —{C(O)C u H 2u O} v —R 11 (III) where R 11 is hydrogen or monovalent alkyl radical containing from 1 to about 20 carbon atoms or an acyl group, and where X is a linear, branched or cyclic divalent hydrocarbon or aralkyl radical containing from 2 to about 20 carbon atoms, optionally containing at least one heteroatom; subscript r is 0 to about 200; subscript s is 0 to about 200; subscript t is 0 to about 200; subscript u is 1 to about 20; subscript v is 1 to about 200, and subject to the limitation if r+s+t is equal to zero then the polyorganosiloxane contains at least one R P radical.