申请人:EXXON CHEMICAL PATENTS INC.
公开号:EP0400869A2
公开(公告)日:1990-12-05
The present invention is directed to improved oil soluble dispersant materials which comprise members selected from the group consisting of oil soluble salts, amides, imides, oxazolines, or mixtures thereof, of polyolefin-substituted mono and dicarboxylic acids or their anhydrides covered as per claim 1 wherein the polyolefin is characterized by number average molecular weight of from about 1,500 to 2,500 and a molecular weight distribution of less than about 3.0, and wherein the dispersant additive contains within its structure an average of from 0.7 to 1.3 mono- or dicarboxylic acid producing moieties (preferably acid or anhydride moieties) covered as per claim 1 per polyolefin molecule, and wherein the dispersant material contains from 0.5 to 4 equivalents of secondary amine groups per equivalent of the mono- or dicarboxylic acid producing moieties per molecule, with the proviso that the dispersant material is further characterized by a Z factor of from 4,000 to ,6,000, wherein the Z factor is determined by the expression:wherein [N] is the total nitrogen content of the dispersant material expressed in wt% and Mn is the polyolefin number average molecular weight.
本发明是关于改进的油溶性分散剂材料,它包括选自由权利要求 1 所述的聚烯烃取代的单羧酸和二羧酸或它们的酸酐的油溶性盐、酰胺、亚胺、噁唑啉或它们的混合物组成的组,其中聚烯烃的特征是数均分子量约为 1,500 至 2,500 和分子量分布小于约 3.0,其中分散剂添加剂在其结构中平均含有 0.7 至 1.3 个按权利要求 1 所述的产生单羧酸或二羧酸的分子(优选酸或酸酐分子),其中每 个聚烯烃分子含有 0.5 至 4 个当量的仲胺基团,但分散剂材料的进一步特征是 Z 系数为 4,000 至 6,000 ,其中 Z 系数由以下表达式确定:其中 [N] 是分散剂材料的总氮含量,以重量%表示,Mn 是聚烯烃的平均分子量。