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2. 发明申请

WO2004080908A3 USE OF A POLYMER DISPERSANT AS A FLUIDISING AGENT FOR HYDRAULIC BINDER COMPOSITIONS AND PREPARATION METHOD THEREOF 审中-公开
标题翻译：聚合物分散剂作为液压粘合剂组合物的流动剂的用途及其制备方法
公开(公告)号：WO2004080908A3
公开(公告)日：2004-10-28
申请号：PCT/FR2004000417
申请日：2004-02-25
申请人： CRAY VALLEY SA , HIDALGO MANUEL , BENSARSA DJAMEL , PABON MARTIAL , GIBERTI FABIO , CORPART JEAN-MARC
发明人： HIDALGO MANUEL , BENSARSA DJAMEL , PABON MARTIAL , GIBERTI FABIO , CORPART JEAN-MARC
IPC分类号： B01F17/00 , B01F17/52 , C04B24/16 , C04B24/20 , C04B24/26 , C04B28/02 , C08F220/04 , C04B24/32 , C08F220/06 , C08F220/28
CPC分类号： C08F220/04 , B01F17/0028 , B01F17/005 , B01F17/0057 , C04B24/163 , C04B24/20 , C04B24/2641 , C04B24/2647 , C04B24/2676 , C04B24/2688 , C04B28/02 , C04B2103/408 , C04B2103/10 , C04B2103/20 , C04B2103/50 , C04B2103/54
摘要： The invention relates to a polycarboxylate-type polymer dispersant comprising at least one copolymer which is obtained from a composition of monomers containing, in moles: A) 40 to 95 % of at least one unsaturated carboxylic monomer; B) 5 to 60 % of at least one acrylic or methacrylic ester monomer containing a polyether chain; and C) 0 to 20 % of at least a third monomer which is selected from acrylic ester or methacrylic ester or acrylamide or a derivative of acrylamide or aromatic vinyl monomer or the sulphonated derivative thereof. According to the invention, the copolymer has a controlled molecular mass distribution and can be obtained using a method comprising the following steps: i) polymerisation in aqueous solution at a temperature varying between 70 and 95 DEG C with a priming and transfer system comprising D) an oxidising agent and E) a reducing agent which is selected from metabisulphite salts, preferably sodium or potassium metabisulphite, the monomer/reducer molar ratio not exceeding 50; ii) semi-continuous addition of the oxidant and the monomer mixture over a time of between 1 and 4 hours; and (iii) introduction of the reducer which can be introduced as a starter before the addition of the oxidant and the monomers, semi-continuously and mixed with the monomers, or semi-continuously but supplied separately from the monomers and the oxidant. The invention also relates to a specific preparation method and to the uses thereof as a fluidising agent in mineral hydraulic binder compositions or as a dispersant agent in pigment pastes or aqueous polymer dispersions.
摘要翻译：本发明涉及包含至少一种共聚物的聚羧酸酯型聚合物分散剂，所述共聚物由含有摩尔数的单体组合物获得：A）40-95％的至少一种不饱和羧酸单体; B）5至60％的至少一种含有聚醚链的丙烯酸或甲基丙烯酸酯单体; 和C）0-20％选自丙烯酸酯或甲基丙烯酸酯或丙烯酰胺或丙烯酰胺或芳族乙烯基单体的衍生物或其磺化衍生物的至少第三种单体。根据本发明，该共聚物具有可控的分子量分布，并且可以使用包括以下步骤的方法获得：i）在70-95℃的温度下用含有D）的引发和转移体系在水溶液中聚合，和E）选自偏亚硫酸氢盐，优选偏亚硫酸氢钠或偏亚硫酸氢钾的还原剂，单体/还原剂的摩尔比不超过50; ii）在1至4小时之间的时间内半连续添加氧化剂和单体混合物; 和（iii）引入可在加入氧化剂和单体之前作为起始剂引入的还原剂，半连续地并与单体混合或半连续地但与单体和氧化剂分开供应。本发明还涉及具体的制备方法及其作为矿物水硬性粘合剂组合物中的流化剂或作为颜料糊剂或聚合物水分散体中的分散剂的用途。

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