公开(公告)号：EP0861859B1

公开(公告)日：2003-08-06

申请号：EP98301206.3

申请日：1998-02-19

申请人： RohMax Additives GmbH

发明人： Kinker, Bernard George ,  Bolliner, Joseph Martin ,  Gore, Robert Howard ,  Pierce, David Arthur

IPC分类号： C08F246/00 ,  C08F2/00 ,  C08F2/06 ,  C10M145/14

CPC分类号： C10M145/14 ,  C08F2/00 ,  C08F2/001 ,  C08F265/04 ,  C08F265/06 ,  C08L51/003 ,  C10M2205/024 ,  C10M2205/026 ,  C10M2205/028 ,  C10M2205/04 ,  C10M2209/04 ,  C10M2209/06 ,  C10M2209/062 ,  C10M2209/084 ,  C10M2209/086 ,  C10M2211/06 ,  C10M2213/02 ,  C10M2213/062 ,  C10M2217/023 ,  C10M2217/024 ,  C10M2217/026 ,  C10M2217/028 ,  C10M2217/06 ,  C08L2666/02

摘要： A process for the preparation of continuously variable-composition copolymers by effecting gradual changes in monomer composition during the polymerization is disclosed. Poly(meth)acrylate copolymers made by the process of the present invention have improved lubricating oil additive properties, for example, as pour point depressants, when compared to related polymer additives made by conventional means.

公开(公告)号：EP0823472B1

公开(公告)日：2004-09-08

申请号：EP97305744.1

申请日：1997-07-30

申请人： RohMax Additives GmbH

发明人： Kinker, Bernard George ,  Gore, Robert Howard ,  Hyndman, Charles William ,  Stevens, Bridget Marie

IPC分类号： C10M169/04

CPC分类号： C10M145/14 ,  C10M105/72 ,  C10M107/48 ,  C10M169/041 ,  C10M2207/024 ,  C10M2207/026 ,  C10M2207/124 ,  C10M2209/084 ,  C10M2215/064 ,  C10M2215/22 ,  C10M2215/221 ,  C10M2215/225 ,  C10M2215/226 ,  C10M2215/30 ,  C10M2219/003 ,  C10M2219/021 ,  C10M2219/0406 ,  C10M2219/044 ,  C10M2219/0463 ,  C10M2219/061 ,  C10M2219/081 ,  C10M2219/101 ,  C10M2223/04 ,  C10M2223/041 ,  C10M2223/042 ,  C10M2225/003 ,  C10M2225/025 ,  C10M2225/0405 ,  C10M2229/041 ,  C10N2240/08 ,  C10N2240/12 ,  C10N2240/121 ,  C10N2240/14

摘要： Polymer compositions derived from selected alkyl (meth)acrylate ester monomers used in certain weight ratios to provide improved viscosity control and low temperature performance characteristics in phosphate ester aircraft hydraulic fluids is disclosed. Polymer compositions for use as viscosity index improving additives in aircraft hydraulic fluids contain from 40 to 100 weight percent (C1-C10)alkyl (meth)acrylate and zero to 60 weight percent (C11-C20)alkyl (meth)acrylate monomer units. Preferred polymer compositions based on 40 to 70 weight percent (C1-C10)alkyl (meth)acrylate and 30 to 60 weight percent (C11-C15)alkyl (meth)acrylate monomer units combine good solubility in the phosphate ester hydraulic fluids with good viscosity control at low and high temperatures.