The use of long-chain citric acid esters as additives in aqueous polymer dispersions for production of porous polymer coatings, preferably for production of porous polyurethane coatings, is described.

The use of long-chain citric acid esters as additives in aqueous polymer dispersions for production of porous polymer coatings, preferably for production of porous polyurethane coatings, is described.

Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier has at least 5 repeating units. Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier includes at least 3 repeating units selected from allylamine, polyaminopolyamide, N-alkyl acrylamides, (meth)acrylic acid, alkyleneamine reacted with a dicarboxylic acid, alpha-olefin-alt-maleic anhydride, styrene maleic anhydride, alkylene oxide, wherein one or more amine or acid group on the repeating unit is amidized.

Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier has at least 5 repeating units. Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier includes at least 3 repeating units selected from allylamine, polyaminopolyamide, N-alkyl acrylamides, (meth)acrylic acid, alkyleneamine reacted with a dicarboxylic acid, alpha-olefin-alt-maleic anhydride, styrene maleic anhydride, alkylene oxide, wherein one or more amine or acid group on the repeating unit is amidized.

A system and method for water shutoff, including providing a treatment fluid including a polymer and a nitrogen-generating compound through a wellbore into a water zone in a subterranean formation, generating nitrogen gas in the water zone by a reaction of the nitrogen-generating compound, generating foam from the nitrogen gas and the treatment fluid in the water zone to give foamed polymer in the water zone, and sealing the water zone with the foamed polymer.

A system and method for water shutoff, including providing a treatment fluid including a polymer and a nitrogen-generating compound through a wellbore into a water zone in a subterranean formation, generating nitrogen gas in the water zone by a reaction of the nitrogen-generating compound, generating foam from the nitrogen gas and the treatment fluid in the water zone to give foamed polymer in the water zone, and sealing the water zone with the foamed polymer.

The present invention relates to a process of producing a nano Omega-3 microemulsion system includes: (i) preparing a dispersal phase by heating Omega-3 to a temperature from 40 to 60 C.; (ii) preparing a carrier by heating a liquid PEG (polyethylene glycol) to a temperature ranging from 40 to 60 C., stirring evenly; (iii) adding the carrier to the dispersal phase in a ratio by mass of 3:1, continuing to keep the said dispersal phase at a temperature ranging from 40 to 60 C., stirring at a speed of 400 to 800 rpm in vacuum; (iv) emulsifying as follows: when the temperature arrives at 60 C., adding ACRYSOL K-140 to the mixture of the carrier and dispersal phase in step (iii) in a ratio by mass of 6:4, continuing to stir at a speed of 500 to 700 rpm, at a temperature of 60 to 80 C., in vacuum, the reaction temperature is kept at a temperature ranging from 60 to 80 C. for 3 to 5 hours, controlling the quality of resulting product by dissolving into water and measuring the transparency, the reation is quenched, the temperature is decreased slowly until it is in the range of 40 to 60 C.; emulsifying for the entire mixture for 30 minutes, at a stirring speed of 400 to 800 rpm; (v) filtrating the product by injecting through nanofilter system before filling-packaging.

Low concentration surfactant emulsions and methods of making and using the same are disclosed herein. The emulsions have the benefit of employing less surfactant than conventional emulsions. Further, the emulsions are dilutable and retain their stability upon dilution. A benefit of the emulsions is that they leave a low residue, preferably no residue, on a surface after contact.

The present invention is directed to an ophthalmic emulsion. The emulsion has a unique combination of ingredients that promotes the stability of small oil droplets within the emulsion. The emulsion also includes a mucoadhesive polymer that aid in delivering a lipid to the ocular surface.

The present invention is directed to a lipid-based ophthalmic emulsion. The emulsion has an increased amount of a mucoadhesive galactomannan polymer that promotes a long-lasting protection against desiccation and moisture retention.