Patent ID: 11879061
Assignee: KEMIRA OYJ
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  E | IPC C

Claim 12:
13. A liquid polymer or inverse emulsion composition comprising:
a. one or more hydrophobic liquids having a boiling point at least about 100° C.;
b. one or more acrylamide-(co)polymers, wherein the one or more acrylamide-(co)polymers optionally comprise crosslinking monomers in an amount of less than about 0.5%, by weight, based on the amount of all monomers of the one or more acrylamide-(co)polymers;
c. one or more emulsifier surfactants having an HLB value of from 2 to 10;
d. one or more inverting surfactants having an HLB value of from 10 to 20, wherein the one or more inverting surfactants are different from the one or more emulsifier surfactants; and
e. one or more siloxane polyether compounds having the formula:, wherein each R is independently selected from methyl, ethyl and propyl; each A independently represents a chain of ethylene oxide (EO) and, optionally, propylene oxide (PO) units, which may be present in block, alternating or random arrangement, wherein the quantity of EO units is in the range of 4 to 30 and the quantity of PO units is in the range of 0 to 30; and k is an integer from 5 to 30,
wherein the one or more siloxane polyether compounds are different from the one or more emulsifier surfactants and the one or more inverting surfactants;
wherein, when the composition is inverted in an aqueous solution, it provides an inverted polymer solution having a filter ratio using a 1.2 micron filter (FR1.2) of about 1.5 or less.