专利检索 ap:("Cognis Deutschland GmbH") AND inv:"SCHRECK, Berthold" 第 1 页

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发明授权
VERWENDUNG BIOLOGISCH ABBAUBARER ALKOXYLIERUNGSPRODUKTE ZUM REINIGEN VON BOHRLÖCHERN, BOHRGERÄTEN ODER BOHRKLEIN 失效
标题翻译：使用可降解的烷氧基化用于清洗钻孔，钻探设备或钻屑

公开(公告)号：EP0935700B1

公开(公告)日：2000-08-16

申请号：EP97948771.7

申请日：1997-10-21

申请人： Cognis Deutschland GmbH

发明人： MÜLLER, Heinz , HEROLD, Claus-Peter , SCHRECK, Berthold , PODUBRIN, Stefan , HEIDBREDER, Andreas

IPC分类号： E21B37/06 , C11D1/74

CPC分类号： C11D1/74 , C09K8/32 , C09K8/52 , C11D11/0041

摘要： Use of biodegradable alcoxylation products for cleaning boreholes, boring instruments or borings, and which are obtained by the reaction of ethylene oxide, propylene oxide and/or butylene oxide with C10-22 carboxylic acid or C10-22 carboxylic acid derivatives, which at least in position 9/10 and/or 13/14 have structural units of general formula (I), in which R means a hydrogen atom, or an OH group or an OR group, R means an alkyl group with 1 to 18 C atoms, an alkenyl group with 2 to 18 C atoms, or a group with formula (II), and R stands for a hydrogen atom, an alkyl group with 1 to 21 C atoms or an alkylene group with 2 to 21 C atoms.