Use of a polymer dispersion as dust control agent
AssigneeKurita Water Industries Ltd.
InventorsMichael Urschey, Rudolf Lunkenheimer, Tim Stephan
Life of this patent
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Abstract
The present invention relates to the use of polymer dispersions for dust control, wherein these polymer dispersions can be obtained by radically initiated emulsion polymerisation of the components a to e: a. 2-75% by weight styrene and/or substituted styrene and b. 0 to 75% by weight acrylic acid C1-C2 ester and/or methacrylic acid C1 to C12 ester and c. 0 to 50% by weight acrylonitrile and/or methacrylonitrile and d. 0 to 50% by weight of at least one further copolymerisable ethylenically unsaturated monomers with one or more C—C double bonds in the presence of e. 10 to 7% by weight starch and/or modified starch and/or degraded starch and/or degrated modified starch wherein the polymerisation is carried out in water.
Claims10
A method of controlling dust comprising:
- applying to a substrate, which is to be treated, a polymer dispersion as a dust control agent, wherein the polymer dispersion is prepared by free radical initiated emulsion polymerization of:
- a. 2 to 75% by weight of styrene and/or substituted styrene,
- b. 0 to 75% by weight of C1 to C12 esters of acrylic acid and/or C1 to C12 esters of methacrylic acid,
- c. 0 to 50% by weight of acrylonitrile and/or methacrylonitrile;
- d. 0 to 50% by weight of at least one further copolymerizable, ethylenically un-saturated monomer with one or more carbon-carbon double bonds, and
- e. 10 to 75% by weight of starch and/or modified starch and/or degraded starch and/or degraded modified starch;
- wherein components a to e are polymerized in water, the sum of a+b+c+d+e being 100% by weight and the ratio of water to the sum of components a to e being 99:1 to 40:60 by weight;
- and
- wherein, when the monomer in group d has more than one carbon-carbon double bond, the monomer is selected from the group consisting of methylene bisacrylamide, polyalkylene glycol di(meth)acrylates, and triallylamine.
Dependencies are inferred from the claim text.