The present invention is a surfactant composition containing (a) a branched alkyl sulfosuccinate ester having a branched alkyl group with 9 or 10 carbons and (b) a surfactant [excluding (a)].

A surfactant composition for a formed sand including 80 to 99.8 mass % of a compound (A) represented by formula (1); 0.1 to 10 mass % of a compound (B) represented by formula (2); and 0.1 to 10 mass % of an amphoteric surfactant (C):

R.sup.1O-(EO).sub.n—SO.sub.3M.sup.1  (1)

wherein R.sup.1 represents a hydrocarbon group having 6 to 22 carbons, EO represents oxyethylene group, n is 1 to 10, and M.sup.1 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium;

R.sup.2O—SO.sub.3M.sup.2  (2)

wherein R.sup.2 represents a hydrocarbon group having 6 to 22 carbons, and M.sup.2 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.

A surfactant composition for a formed sand including 80 to 99.8 mass % of a compound (A) represented by formula (1); 0.1 to 10 mass % of a compound (B) represented by formula (2); and 0.1 to 10 mass % of an amphoteric surfactant (C):

R.sup.1O-(EO).sub.n—SO.sub.3M.sup.1  (1)

wherein R.sup.1 represents a hydrocarbon group having 6 to 22 carbons, EO represents oxyethylene group, n is 1 to 10, and M.sup.1 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium;

R.sup.2O—SO.sub.3M.sup.2  (2)

wherein R.sup.2 represents a hydrocarbon group having 6 to 22 carbons, and M.sup.2 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.

The present invention is concerned with a reactive surfactant composition for emulsion polymerization, which is able to micronize the particle diameter of a polymer emulsion and to reduce the addition amount of the reactive surfactant composition to be used. The reactive surfactant composition for emulsion polymerization of the present invention contains a reactive anionic surfactant (component A) represented by the following formula (I): ##STR00001##
wherein AO represents an alkyleneoxy group having a carbon number of 3 or more and 18 or less; EO represents an ethyleneoxy group; p represents an integer of 1 or more and 15 or less; m′ represents an integer of 0 or more; n′ represents an integer of 0 or more; M.sup.+ represents a hydrogen ion or a cation; and plural kinds of AOs may coexist.

The invention relates to compositions containing compounds of formula (I), formula (II), or mixtures thereof, in which n is an integer greater than or equal to 1, R.sup.1, an aliphatic, linear or branched hydrocarbon group having 1 to 10 carbon atoms, a hydrogen atom, the structural unit —O—X, or the structural unit —CH.sub.2—O—X, X corresponds to formula (III), in which a is an integer from 2 to 6, b is an integer from 0 to 3, c is an integer from 20 to 28, m is 1 or 2, R.sup.2 is an aliphatic, linear or branched hydrocarbon group having 1 to 10 carbon atoms, Y is hydrogen, —SO.sub.3M, —SO.sub.2M, —PO.sub.3M.sub.2, or —CH.sub.2COOM, and M is a cation. The compounds of formula (I), of formula (II), or mixtures thereof are preferably suitable to act as a dispersing agent. ##STR00001##

The invention relates to compositions containing compounds of formula (I), formula (II), or mixtures thereof, in which n is an integer greater than or equal to 1, R.sup.1, an aliphatic, linear or branched hydrocarbon group having 1 to 10 carbon atoms, a hydrogen atom, the structural unit —O—X, or the structural unit —CH.sub.2—O—X, X corresponds to formula (III), in which a is an integer from 2 to 6, b is an integer from 0 to 3, c is an integer from 20 to 28, m is 1 or 2, R.sup.2 is an aliphatic, linear or branched hydrocarbon group having 1 to 10 carbon atoms, Y is hydrogen, —SO.sub.3M, —SO.sub.2M, —PO.sub.3M.sub.2, or —CH.sub.2COOM, and M is a cation. The compounds of formula (I), of formula (II), or mixtures thereof are preferably suitable to act as a dispersing agent. ##STR00001##

The invention relates to compositions containing compounds of formula (I), formula (II), or mixtures thereof, in which n is an integer greater than or equal to 1, R.sup.1, an aliphatic, linear or branched hydrocarbon group having 1 to 10 carbon atoms, a hydrogen atom, the structural unit —O—X, or the structural unit —CH.sub.2—O—X, X corresponds to formula (III), in which a is an integer from 2 to 6, b is an integer from 0 to 3, c is an integer from 20 to 28, m is 1 or 2, R.sup.2 is an aliphatic, linear or branched hydrocarbon group having 1 to 10 carbon atoms, Y is hydrogen, —SO.sub.3M, —SO.sub.2M, —PO.sub.3M.sub.2, or —CH.sub.2COOM, and M is a cation. The compounds of formula (I), of formula (II), or mixtures thereof are preferably suitable to act as a dispersing agent.

##STR00001##

The present invention is concerned with a reactive surfactant composition for emulsion polymerization, which is able to micronize the particle diameter of a polymer emulsion and to reduce the addition amount of the reactive surfactant composition to be used.

The reactive surfactant composition for emulsion polymerization of the present invention contains a reactive anionic surfactant (component A) represented by the following formula (I), the component A being satisfied with the following requirement R:

##STR00001## wherein AO represents an alkyleneoxy group having a carbon number of 3 or more and 18 or less; E represents an ethyleneoxy group; p represents an integer of 1 or more and 15 or less; m represents an integer of 0 or more; n represents an integer of 0 or more; M.sup.+ represents a hydrogen ion or a cation; and plural kinds of AOs may coexist.

Requirement R: An average addition molar number m of AO is a number of 1 or more and 50 or less; an average addition molar number n of EO is a number of 0 or more and 200 or less; and when in the component A, a component having an addition molar number of AO of (m3) or less is defined as (component A-1), and a component having an addition molar number of AO of (m+2) or more is defined as (component A-2), X in the following formula (I) is less than 30, provided that when m is less than 3, (m=0) is defined as (component A-1):

X={(molar number of component A-1)+(molar number of component A-2)}(molar number of component A)100(I).

The present disclosure relates to methods for treating a water zone of a subterranean formation by injecting a mixture including an anionic surfactant and an amine, followed by CO.sub.2, to reduce water production from the formation.

The present disclosure relates to methods for treating a water zone of a subterranean formation by injecting a mixture including an anionic surfactant and an amine, followed by CO.sub.2, to reduce water production from the formation.