Process for emulsion polymerization

摘要

Process for polymerizing at least one monomer under emulsion polymerization conditions, characterized in that the (co)monomers are selected from vinyl aromatic compounds, ethylenically unsaturated carboxylic acids with 3 to 10 carbon atoms, C1-C10-alkyl esters of ethylenically unsaturated carboxylic acids with 3 to 10 carbon atoms, 1,3-butadiene, and a-olefins bearing in the range of from 10 to 250 carbon atoms per molecule, in pure form or as mixture with isomers, and using a surfactant mixture comprising (A) an alkoxylation product of at least one alkanol (a), characterized in that alkanol (a) has 6 to 12 carbon atoms per molecule and the average number of alkylene oxide units per molecule in alkoxylation product (A) assumes a value in the range of from 35 to 55, the alkylene oxide units are selected from C2-C10-alkylene oxide units and alkanol (a) has an average degree of branching of at least 1; and (B) an alkoxylation product of at least one alkanol (b), characterized in that alkanol (b) has 13 to 19 carbon atoms per molecule and the average number of alkylene oxide units per molecule in alkoxylation product (B) assumes a value in the range of from 35 to 55, the alkylene oxide units are selected from C2-C10-alkylene oxide units, or (C) an alkoxylation product of at least one linear C12-C22-alkyl alcohol (c), characterized in that the average number of alkylene oxide units per molecule in alkoxylation product (C) assumes a value in the range of from 35 to 55, the alkylene oxide units are selected from C2-C10-alkylene oxide units.

主权项

1. A process, comprising:
polymerizing at least one monomer in the presence of a surfactant mixture under emulsion polymerization conditions, wherein the at least one monomer is selected from the group consisting of a vinyl aromatic compound, an ethylenically unsaturated carboxylic acid with 3 to 10 carbon atoms, a C1-C10-alkyl ester of an ethylenically unsaturated carboxylic acid with 3 to 10 carbon atoms, an ethylenically unsaturated carboxylic acid with 3 to 10 carbon atoms, 1,3-butadiene, isoprene, and an α-olefin bearing in the range of from 10 to 250 carbon atoms per molecule, in pure form or as mixture with at least one isomer, and the surfactant mixture comprises (A) an alkoxylation product comprising an alkanol (a), wherein the alkanol (a) has 6 to 12 carbon atoms per molecule and an average number of alkylene oxide units per molecule in the alkoxylation product (A) is in the range of from 35 to 55, the alkylene oxide units are C2-C10-alkylene oxide units and the alkanol (a) has an average degree of branching of at least 1; and at least one of (B) an alkoxylation product comprising an alkanol (b), wherein the alkanol (b) has 13 to 19 carbon atoms per molecule and an average number of alkylene oxide units per molecule in the alkoxylation product (B) is in the range of from 35 to 55, the alkylene oxide units are C2-C10-alkylene oxide units, or (C) an alkoxylation product comprising a linear C12-C22-alkyl alcohol (c), wherein an average number of alkylene oxide units per molecule in the alkoxylation product (C) is in the range of from 35 to 55, the alkylene oxide units are C2 -C10-alkylene oxide units.