23-06-2016 дата публикации
Номер: US20160177144A1
The present invention relates to a composition comprising at least one aqueous dispersion of a copolymer of the styrene-(meth)acrylic/(meth)acrylate type, at least one filler, and a particular thickening system, as well as the use of such a composition as a fixing glue. 1. Adhesive composition comprising: (a1) a styrene monomer, and', '(a2) at least one comonomer selected from (meth)acrylic acids, the basic salts of these acids, the alkyl (meth)acrylates whose alkyl moiety, saturated or unsaturated, linear or branched, cyclic or acyclic, comprises from 1 to 30 carbon atoms, and said alkyl moiety may be interrupted by one or more oxygen atoms, may be epoxidized and/or may be terminated with a hydroxyl function, and optionally', '(a3) a silanized comonomer selected from vinyl silanes and silanized (meth)acrylic acid esters,', 'the content of dry matter in the aqueous dispersion a) being in the range from 30 to 80 wt % relative to the weight of said aqueous dispersion a),, 'a) from 50 to 75 wt %, relative to the weight of the adhesive composition, of a dispersion in water of at least one polymer obtained fromb) from 2.5 to 6 wt %, relative to the weight of the adhesive composition, of at least one sepiolite, c1) a water-based composition comprising at least one polymer obtained from:', '(c1.1) at least one monomer selected from (meth)acrylic acids, 2-acrylamido-2-methyl propane sulphonic acid, 2-sulphoethyl methacrylate, styrene phosphonic acid, and the basic salts of these acids, and', '(c1.2) at least one comonomer selected from (meth)acrylamides and vinyl pyrrolidone,', 'the content of dry matter in the water-based composition c1) being in the range from 10 to 40 wt % relative to the weight of said water-based composition c1), and', 'c2) a water-based composition comprising:', '(c2.1) at least one polymer obtained from:', {'sub': 1', '4, '(c2.1.1) at least one monomer selected from (meth)acrylic acid esters and maleic acid esters, said esters comprising at least one ...
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