BIODEGRADABLE POLYORGANOSILOXANE DEMULSIFIER COMPOSITION AND METHOD FOR MAKING THE SAME

摘要

[0095] There is provided herein a demulsifying composition comprising (a) an emulsion; and (b) a demulsifying-effective amount of at least one polyorganosiloxane compound having the general formula (I): M1aM2bD1cD2d T1eT2fQg (I) wherein: M1 = R1 R2R3SiO1/2, M2 = R4R5RLSiO1/2,D1 = R6R7Si02/2,D2 = R8RLSi02/2, T1 = R9Si03/2,T2 = RLSi03/2,Q = Si04/2, where R1, R2, R3, R4, R5, R6, R7, R8 and R9 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 chosen from Rp; RP is a monovalent polyether radical independently of the general formula (II): - (CnH2n)-0-(C2H40)o-(C3H6O)p-(C4H8O)q -R10 (II) where R10 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; RL is a monovalent radical independently chosen from the general formula (III): -X-0-(C2H4O)-(C3H6O)s-(C4H8O)t-{C(0)CuH2uO}v-R11 (III) where R11 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 21 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 RP radical. There is also provided herein a method for separating emulsions comprising combining the components of the demulsification composition into a mixture; allowing the mixture to separate into at least two phases and separating said at least two phases from each other.