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US 9,957,437 B2Granted
Carbonyl functional inversion agents for water-in-oil latices and methods of use
AssigneeEcolab USA Inc.
InventorsXiaojin Harry Li, Anand Parthasarathy
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Abstract
Water-in-oil latices of water soluble or dispersible polymers and methods of using the same are presented. The latices include carbonyl functional inversion agents that provide rapid and complete inversion of the latices under conditions wherein the water source used to invert the latex is provided at high temperature, or includes a high level of total dissolved solids, or is both high temperature and high total dissolved solids.
Claims22
A water-in-oil latex comprising
- about 15 wt % to 70 wt % of a water soluble or dispersible polymer comprising 1 mol % to about 100 mol % acrylamide monomers;
- about 0.1 wt % to 20.0 wt % of an inversion surfactant characterized as having a hydrophilic/lipophilic balance of 10 or greater;
- and
- about 0.1 wt % to 20.0 wt % of an inversion agent that is a carbonyl functional inversion agent, wherein the inversion agent is not a surfactant.
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A method of forming an invertible latex, the method comprising
- (a) forming a water-in-oil latex comprising
- about 15 wt % to 70 wt % of a water soluble or dispersible polymer;
- about 3 wt % to 50 wt % water;
- about 10 wt % to 40 wt % of a compound or blend thereof that is less than 0.1 wt % soluble in water at 25° C. and is substantially a liquid over the range of 20° C. to 90° C. and comprising linear, branched, or cyclic hydrocarbon moieties;
- and
- about 20 wt % or less of a latex surfactant characterized as having a hydrophilic/lipophilic balance of between 2 and 10;
- and
- (b) adding to the latex
- about 0.1 wt % to 20.0 wt % of an inversion surfactant characterized as having a hydrophilic/lipophilic balance of 10 or greater;
- and
- about 0.1 wt % to 5.0 wt % of a carbonyl functional inversion agent to form an invertible latex, wherein the inversion agent is not a surfactant.
8 more elements
Dependencies are inferred from the claim text.