申请人:Castrol Limited
公开号:EP2484660A2
公开(公告)日:2012-08-08
A graft copolymer containing one or more ethylenically-unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing graftable monomers grafted to a polyolefin is disclosed. Novel monomers, methods of making such monomers, and graft copolymers comprising such monomers are based on reacting an acylating agent with an amine to form a reaction product. The reaction product may include more than one chemical compound formed from the combination of the acylating agent and the amine. The monomer is the graftable, ethylenically unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing compound(s) of the reaction product. The monomer may, but need not, be recovered from the product mixture. The preferred monomer is the reaction product of maleic anhydride and 4-aminodiphenylamine. Also described is a method of making a dispersant viscosity index improver. The monomer of the present invention may be grafted to a polyolefin in solutions or melts. Also described is a lubricating oil comprising a base oil and a grafted polyolefin as described above.
本发明公开了一种接枝共聚物,它含有一种或多种与聚烯烃接枝的乙烯不饱和、脂肪族或芳香族、含氮和含氧的可接枝单体。新型单体、制造此类单体的方法以及包含此类单体的接枝共聚物是基于酰化剂与胺反应形成反应产物。反应产物可包括由酰化剂和胺结合形成的一种以上的化合物。单体是反应产物中可接枝的、乙烯基不饱和、脂肪族或芳香族、含氮和氧的化合物。单体可以但不必从产品混合物中回收。优选的单体是马来酸酐和 4-氨基二苯胺的反应产物。还描述了一种制造分散剂粘度指数改进剂的方法。本发明的单体可以在溶液或熔体中接枝到聚烯烃上。还描述了一种润滑油,包括基础油和上述接枝聚烯烃。