Patent GB-1083011-A (GB)
Title: Bright drying emulsion
Inventor: POHLEMANN HEINZ
IPC: C09G1/10
Filed: 1964-11-27
Abstract: A bright drying emulsion comprises an aqueous wax dispersion and an aqueous dispersion of a copolymer obtained by polymerizing a mixture of (a) 70 to 90 parts by weight of at least one vinyl aromatic compound, e.g. styrene or a methylstyrene; (b) 1 to 20 parts by weight of at least one ester of an a ,b -ethylenically unsaturated carboxylic acid with an aliphatic or cycloaliphatic alcohol having up to 12 carbon atoms; (c) 1 to 15 parts by weight of at least one mono-ester of acrylic or methacrylic acid with a polyhydric aliphatic alcohol having 2-6 carbon atoms; and (d) 1 to 15 parts by weight of at least one ethylenically unsaturated carboxylic acid containing 3-24 carbon atoms; the weight ratio of wax to copolymer being from 20:80 to 80:20 when ionic wax dispersions are used, and from 40:60 to 90:10 when nonionic wax dispersions are used. Waxes specified are esterified montan wax, carnauba wax, paraffin waxes melting above 70 DEG  C., and water-soluble ethylene copolymers, e.g. ethylene-acrylic acid copolymers.  The wax dispersions may contain anionic surfactants, e.g. amine soaps of fatty acids, or non-ionic surfactants, e.g. ethoxylated fatty alcohols or alkyl phenols. The copolymer dispersions may be emulsified with the sodium salt of the sulphate of ethoxylated isooctyl phenol.  The bright drying emulsions may include additional components, e.g. triisobutyl phosphate (a softener and levelling agent); alkali-soluble resins, e.g. shellac, maleic acid copolymers, colophonymaleic acid adducts; and water-dispersible phenol-formaldehyde-resins.ALSO:A bright drying emulsion comprises an aqueous wax dispersion and an aqueous dispersion of a copolymer obtained by polymerizing a mixture of (a) 70 to 90 parts by weight of at least one vinyl aromatic compound, (b) 1 to 20 parts by weight of at least one ester of an a ,b -ethylenically unsaturated carboxylic acid with an aliphatic or cycloaliphatic alcohol having up to 12 carbon atoms, (c) 1 to 15 parts by weight of at least one mono-ester of acrylic or methacrylic acid with a polyhydric aliphatic alcohol having 2-6 carbon atoms, and (d) 1 to 15 parts by weight of at least one ethylenically unsaturated carboxylic acid containing 3-24 carbon atoms; the weight ratio of wax to copolymer being from 20:80 to 80:20 when ionic wax dispersions are used, and from 40:60 to 90:10 when non-ionic wax dispersions are used. Examples of monomers (a) are styrene, 2-methylstyrene, 4-methylstyrene and a -methylstyrene. Monomer (b) is preferably a C1- 4 aliphatic alcohol of acrylic or methacrylic acid; but esters of maleic and fumaric acid and esters of other alcohols are also referred to.  Monomer (c) may be an ester of ethylene glycol, 1,2- or 1,3 - propylene glycol, 1,4 - butanediol, 1,6 - hexane-diol, glycerine, trimethylol propane or pentaerythritol.  Suitable acid monomers (d) include acrylic, methacrylic, crotonic, itaconic, oleic, linoleic, linolenic, elaeostearic and erucic acids.  Waxes specified are esterified montan wax, carnauba wax, paraffin waxes melting above 70 DEG  C., and water-soluble ethylene copolymers, e.g. ethylene-acrylic acid copolymers. The wax dispersions may contain anionic surfactants, e.g. amine soaps of fatty acids, or nonionic surfactants, e.g. ethoxylated fatty alcohols or alkyl phenols.  The copolymer dispersions may be emulsified with the sodium salt of the sulphate of ethoxylated isooctylphenol. The bright drying emulsions may include additional components, e.g. triisobutyl phosphate (a softener and levelling agent); alkali-soluble resins, e.g. shellac, maleic acid copolymers, colophony-maleic acid adducts; and water - dispersible phenol - formaldehyde resins.