Patent ID: 6656983
Filing Date: 2003-12-02
Classification: C08F,C08L,C09J

Abstract:
An adhesive composition for porous material having improved hydrophobicity, water resistance and storage stability, comprised of vinylaromatic/1,3-diene copolymers stabilized with protective colloids, in the form of their aqueous polymer dispersions or water-redispersible polymer powders, the polymer dispersions and the polymer powders being obtained by emulsion polymerization of a mixture comprisinga) 20 to 80 percent by weight of one or more vinylaromatics, b) 19.9 to 79.9 percent by weight of one or more 1,3-dienes, c) 0.1 to 15 percent by weight of more comonomers from the group consisting of N-methylolacrylamide, N-methylolmethacrylamide and the N-(alkoxymethyl)-acrylamides and N-(alkoxymethyl)methacrylamides with a C1 to C6-alkyl radical, the percentages by weight adding up to 100%, in the presence of one or more protective colloids and in the absence of emulsifier(s), and optionally drying the aqueous polymer dispersion obtained, wherein said one or more protective colloids are selected from the group consisting of polyvinyl alcohols, starches, modified starches, starch ethers, dextrins, cyclodextrins, celluloses and carboxymethyl, methyl, hydroxyethyl and hydroxypropyl derivatives thereof, poly(meth)acrylic acid, and poly(meth)acrylamide.