ROTH, Erna,ALEXOWSKY, Rüdiger,PETEREIT, Hans-Ulrich,NOLLENBERGER, Kathrin,MEIER, Christian
申请号：
ES09756717
公开号：
ES2671036T3
申请日:
2009.11.16
申请国别(地区):
ES
年份:
2018
代理人:
摘要：
A process of converting a solid (meth) acrylate copolymer into a dispersed form by preparing an aqueous dispersion comprising the components (a) a (meth) acrylate copolymer which is composed of free radical polymerized methyl methacrylate, ethyl acrylate and a 2-trimethylammonioethyl methacrylate salt, present in solid form as a powder or as a granule, where the (meth) acrylate copolymer is composed of 50 to 70% by weight of methyl methacrylate, 20 to 40% by weight of ethyl acrylate and 7 to 2% by weight of a salt of 2-trimethylammonioethyl methacrylate, in which the percentages by weight total 100% or the copolymer of (meth) acrylate is composed of 50 to 70% by weight of methyl methacrylate, 20 to 40% by weight of ethyl acrylate and more than 7 to 12% by weight of a 2-trimethylammonioethyl methacrylate salt, in which the percentages by weight add up to 100%, (b) up to 50% by weight calculated based on the copolymer ero of (meth) acrylate (a) of a dispersing agent selected from the groups of (b) i) plasticizers in combination with emulsifiers and / or (b) ii) selected from one or more of the groups consisting of (b) ii-i) fatty alcohols having 6 to 18 carbon atoms, (b) ii-ii) water soluble salts of saturated or unsaturated carboxylic acids having 6 to 18 carbon atoms, (b) ii-iii) monocarboxylic acids unsubstituted having 6 to 18 carbon atoms, (b) ii-iv) hydroxycarboxylic acids having 6 to 18 carbon atoms. (c) water mixing components (a), (b) and (c) to give a suspension that becomes an aqueous dispersion during the conversion of the solid (meth) acrylate copolymer into the dispersed form, where the plasticizer with respect to component (b) is selected from the group consisting of alkyl citrates, alkyl phthalates, alkyl sebacates, polyethylene glycols or mixtures thereof and the emulsifier with respect to component (b) is selected from the group consisting of alkyl sulfates fatty, sucrose stearate, polysorbates or mixtures thereof or of sodium salts of fatty alcohol
