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COMPOSIÇÃO DE ÓLEO LUBRIFICANTE, POLÍMERO DE ENXERTO E RESPECTIVO PROCESSO DE PREPARAÇÃO

专利摘要

COMPOSIÇÃO DE ÓLEO LUBRIFICANTE, POLÍMERO DE ENXERTO E RESPECTIVO PROCESSO DE PREPARAÇÃO. A presente invenção refere-se a um polímero de enxerto de: (a) uma polialfaolefina apresentando um peso molecular ponderal médio menor que 15.000 e uma polidispersidade de 1,1 a 10; (b) um monômero nitrogenoso etilenicamente insaturado alifático ou aromático enxertável contendo de 2 a cerca de 50 átomos de carbono; e (c) um composto organo-metálico selecionado a partir de compostos de organomolibdênio, organo-titânio, organomanganês e misturas destes; a um processo para a preparação do polímero e enxerto; e a uma composição de óleo lubrificante compreendem uma maior quantidade de um óleo de base e uma menor quantidade do polímero de enxerto. ......

基本信息

专利类型:
发明专利
申请/专利号:
BR112012024121
申请日期:
2011-04-01
专利申请人:
卡斯特罗尔有限公司
分类号:
["C08F255/00","C08F255/02","C08F8/42","C10M143/00"]
发明/设计人:
RICHARD P. SAUER
权利要求: Claims:1. A graft polymer of: (a) a polyalphaolefin having a weight average molecular weight of less than 15000 and a polydispersity of 1.1 to 10; (b) a nitrogenous, ethylenically unsaturated, aliphatic or aromatic, graftable monomer having from 2 to about 50 carbon atoms; and (c) an organo-metallic compound selected from organo-molybdenum, organo- titanium, organo-manganese compounds and mixtures thereof.2. A process for making the graft polymer as claimed in claim 1 comprising the steps of (a) contacting, in one or more steps: (i) a polyalphaolefin having a weight average molecular weight of less than 15000 and a polydispersity of 1.1 to 10; (ii) a nitrogenous, ethylenically unsaturated, aliphatic or aromatic, graftable monomer having from 2 to about 50 carbon atoms; and (iii) a free-radical initiator; at a temperature exceeding the initiation temperature of the initiator; (b) contacting the product of step (a) and an organo-metallic compound, selected from organo-molybdenum, organo -titanium, organo-manganese compounds and mixtures thereof, with an initiator at a temperature exceeding the initiation temperature of the initiator.3. A graft polymer as claimed in claim 1 wherein the polymer contains from about 0.5 to about 5.0 moles of graftable monomer per mole of polyalphaolefin.4. A graft polymer as claimed in claim 1 or claim 3 wherein the polymer contains from about 1.0 to about 5.0 moles of organo-molybdenum compound per mole of polyalphaolefin.5. A graft polymer as claimed in any one of claims 1, 3 or 4 wherein the polyalphaolefin has a weight average molecular weight of less than 10000.6. A graft polymer as claimed in any one of claims 1, 3, 4, or 5 wherein the polyalphaolefin has a weight average molecular weight in the range 2000 to 6000. 7. A graft polymer as claimed in any one of claims 1, 3, 4, 5 or 6 wherein the polyalphaolefin has a polydispersity of from about 1.4 to about 3.0.8. A graft polymer as claimed in any one of claims 1 or 3 to 7 wherein the polyalphaolefin is a homopolymer of a C10 olefin or a homopolymer of a Cjo and a Q2 olefin.9. A graft polymer as claimed in any one of claims 1 or 3 to 8 wherein the polyalphaolefin is a homopolymer of 1-decene.10. A graft polymer as claimed in any one of claims 1 or 3 to 9 wherein the graftable monomer is 1-vinylimidazole.1 1. A graft polymer as claimed in any one of claims 1 or 3 to 10 wherein the organo- metallic compound is an organo-molybdenum compound.12. A graft polymer as claimed in any one of claims 1 or 3 to 11 wherein the organo- metallic compound is an organo-titanium compound.13. A lubricating oil composition comprising a major amount of a base oil and a minor amount of the graft polymer as claimed in any of claims 1 or 3 to 12.14. A lubricating oil composition as claimed in claim 13 wherein the graft polymer is present in the lubricating oil composition in an amount of from about 0.2% to about 5% by weight (not including any base oil carried over from the making of the grafted polymer).