Emulsifier composition

Claim 2

The mixture as claimed in claim 1, wherein in the emulsifier of formula (II) and (III) k, respectively (n + m + p), is an integer from 7 to 10.

Claim 3

The mixture as claimed in claim 1 or 2, comprising from 5 to 60 % by weight of the total weight of emulsifiers present in the mixture, of at least one emulsifier of formula (IV) wherein R 10 represents a C1-18 alkyl group and L' represents a cation.

Claim 4

The mixture as claimed in claim 3, comprising, per weight of emulsifiers present in the mixture, from 15 to 60 % by weight of at least one emulsifier of formula (I), from 30 to 60 % by weight of at least one emulsifier of formula (II) or (III) and from 10 to 45 % by weight of at least one emulsifier of formula (IV).

Claim 5

The use of an emulsifier mixture as claimed in any preceding claims in emulsion polymerisation.

Claim 6

An aqueous polymer dispersion comprising an emulsifier mixture as claimed in any of claims 1 to 4.

Claim 7

The aqueous polymer dispersion according to claim 6, comprising a polymer P comprising from 5 to 92.5 wt.-% of at least one alkyl acrylate the homopolymers of which have a glass transition temperature of -40°C or below (constituent a), and from 7.5 to 95 wt % of at least one alkyl (meth)acrylate the homopolymers of which have a glass transition temperature of at least -25°C.

Claim 8

The aqueous polymer dispersion according to claim 7, wherein polymer P comprises from 5 to 92.5 wt.-% of at least one alkyl acrylate the homopolymers of which have a glass transition temperature of -40°C or below (constituent a); from 2.5 to 30 wt.-% of at least one alkyl (meth)acrylate the homopolymers of which have a glass transition temperature of from -25°C to 0°C (constituent b); from 2.5 to 30 wt.-% of at least one alkyl (meth)acrylate the homopolymers of which have a glass transition temperature of between 0°C and 20°C (constituent c); from 1 to 75 wt.-% of at least one ethylenically unsaturated monomer the homopolymers of which have a glass transition temperature of 20°C or above and which do not contain a functional group selected from hydroxyl, acid, acid anhydride, nitro, epoxy and amino groups (constituent d); from 0 to 10 wt.-% of at least one ethylenically unsaturated monomer having at least one acid group or acid anhydride group (constituent e); and from 0 to 60 wt.-% of at least one ethylenically unsaturated monomer having either no further functional group or in addition to the ethylenically unsaturated group at least one functional group other than an acid group or an acid anhydride group (constituent f).

Claim 9

The aqueous polymer dispersion according to claim 8, wherein constituent (d) is a monomer selected from the group consisting of: (i) alkyl (meth)acrylates, (ii) vinylaromatic compounds, (iii) vinylhalides, (iv) vinylnitriles and (v) vinylesters of carboxylic acids.

Claim 10

The aqueous polymer dispersion according to claim 9, wherein constituent a is selected from the group consisting of n-butyl acrylate, 2-ethylbutyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, nonyl acrylate and octyl acrylate; constituent b is selected from the group consisting of ethyl acrylate, sec-butyl acrylate, dodecyl acrylate, isobutyl acrylate and isopropyl acrylate; constituent c is selected from the group consisting of methyl acrylate and n-butyl methacrylate; constituent d is selected from the group consisting of methyl methacrylate, tert-butyl acrylate, methylstyrene, para-methylstyrene, tert-butylstyrene, styrene, vinyl chloride, methacrylonitrile, vinyl acetate and vinyl formate; constituent e is selected from the group consisting of (meth)acrylic acid, maleic acid, maleic acid anhydride, maleic acid monoester and fumaric acid monoester; and constituent f comprises at least one ethylenically unsaturated compound having a group selected from the groups consisting of epoxy groups, hydroxyl groups, ethyl imidazolidone groups, N-methylol groups, carbonyl groups or further ethylenically unsaturated groups which are not conjugated with the other ethylenically unsaturated group.

Claim 11

The aqueous polymer dispersion according to any of claims 6 to 10, wherein polymer P is composed of 60 to 70 wt.-% of 2-ethylhexyl acrylate, 0 to 1 wt.-% of n-butyl acrylate, 10 to 15 wt.-% of ethyl acrylate, 10 to 15 wt.-% of methyl acrylate, 1 to 5 wt.-% of styrene, 0.5 to 2 wt.-% of acrylic acid, 0.5 to 2 wt.-% of methacrylic acid, 0.1 to 5 wt.-% of ethyl imidazolidone methacrylate and/or 0 to 2 wt.-% methyl methacrylate.

Claim 12

The aqueous polymer dispersion according to any of claims 6 to 11, wherein the amount of emulsifier mixture is from 1 to 5 % by weight relative to the weight of polymer P.

Claim 13

The aqueous polymer dispersion according to any of claims 6 to 12, wherein the aqueous polymer dispersion is prepared by emulsion polymerisation in the presence of a emulsifier mixture according to any of claims 1 to 4.

Claim 14

Use of an aqueous polymer dispersion according to any of claims 6 to 13 for the preparation of an adhesive.