公开(公告)号：US07674364B2

公开(公告)日：2010-03-09

申请号：US11845935

申请日：2007-08-28

申请人： William Loh ,  John M. Rosenbaum ,  Nancy J. Bertrand ,  Patricia V. Lemay

发明人： William Loh ,  John M. Rosenbaum ,  Nancy J. Bertrand ,  Patricia V. Lemay

IPC分类号： C10M145/14 ,  C10G71/00

CPC分类号： C10M107/02 ,  C10M169/04 ,  C10M2205/173 ,  C10M2209/084 ,  C10N2220/021 ,  C10N2220/022 ,  C10N2220/10 ,  C10N2220/13 ,  C10N2230/02 ,  C10N2230/10 ,  C10N2230/36 ,  C10N2230/40 ,  C10N2230/74 ,  C10N2240/08

摘要： A hydraulic fluid composition having excellent seal compatibility is prepared from an isomerized base oil is provided. The composition comprising (i) 80 to 99.999 wt. % of a lubricating base oil having consecutive numbers of carbon atoms, less than 10 wt % naphthenic carbon by n-d-M, less than 0.10 wt. % olefins and less than 0.05 wt. % aromatics, a molecular weight of greater than 600 by ASTM D 2503-92 (Reapproved 2002), a wt % total molecules with cycloparaffinic functionality greater than 25 and a ratio of molecules with monocycloparaffinic functionality to molecules with multicycloparaffinic functionality greater than 10; and (ii) optionally from 0.001 to 6 wt % of a viscosity modifier; and (iii) 0-10 wt % of at least an additive package. When used in operations, the composition results in an average volume change in a rubber seal of less than 3% and an average hardness change in the rubber seal of less than 1 pts. when tested under ASTM D 471-06 (SRE NBR1 at 100° C., 168 hours).

摘要翻译： 由异构化的基础油制备具有优异的密封相容性的液压组合物。 该组合物包含（i）80至99.999重量％ ％的具有连续数目的碳原子的润滑基础油，小于10重量％的环烷碳，n-d-M，小于0.10重量％ ％的烯烃和小于0.05wt。 ％芳族化合物，通过ASTM D 2503-92（重新批准2002）的分子量大于600，环烷烃官能度大于25的总重分子百分比和具有多环烷烃官能团的分子与多环烷烃官能度大于10的比例; 和（ii）任选0.001至6重量％的粘度调节剂; 和（iii）0-10重量％的至少一种添加剂包。 当在操作中使用时，组合物导致橡胶密封件的平均体积变化小于3％，橡胶密封件的平均硬度变化小于1点。 当根据ASTM D 471-06（SRE NBR1，100℃，168小时）测试时。