润滑科技信息平台

专利摘要

本发明涉及包含聚合形式的式(I)的PIB大分子单体和式(II)的丙烯酸酯单体的梳形共聚物。本发明还涉及式(I)的PIB大分子单体的制备方法,其中式(III)的聚异丁烯酚与(甲基)丙烯酸酐反应; 以及包含基础油、梳形共聚物和其他润滑剂添加剂的润滑剂; 以及该梳形共聚物用于提高润滑油粘度指数的用途。 ......

基本信息

专利类型:
发明专利
申请/专利号:
EP2022822998
申请日期:
2022-11-29
专利申请人:
巴斯夫欧洲公司
分类号:
C10M145/14
发明/设计人:
GARCIA CASTRO, IVETTE ， KOSCHABEK, RENE ， MISSKE, ANDREA ， FLECKENSTEIN, CHRISTOPH
权利要求: Claims 1. A comb copolymer comprising in polymerized form (A) a PIB macromonomer of the formula (I)where R1to R5are selected independently from each other from the group comprising hydrogen, C1-C20-alkyl, C1-C20-alkyloxy, C8-C7500-polyisobutyl and C8- C7500-polyisobutenyl, where at least one of R1to R5is a C8-C7500-polyisobutyl or C8- C7500-polyiso-butenyl group, and R6is hydrogen or methyl, and (B) an acrylate monomer of the formula (II) H2C=C(R7)COOR8(II) where R7is hydrogen or methyl, and R8is a C1-36alkyl. 2. The comb copolymer according to claim 1 where one of R1to R5is a C8-C7500- polyisobutyl or C8-C7500-polyiso-butenyl group. 3. The comb copolymer according to claim 1 or 2 where R3is a C8-C7500-polyisobutyl or C8-C7500-polyisobutenyl group.4. The comb copolymer according to any of claims 1 to 3 where the moieties R1to R5which are not C8-C7500-polyisobutyl or C8-C7500-polyiso-butenyl groups are selected from the group of hydrogen, methyl or tert.-butyl. 5. The comb copolymer according to any of claims 1 to 4 where the acrylate monomer comprises a hydrophobic acrylate monomer of the formula (IIa) H2C=C(R7)COOR8a(IIa), where R7is hydrogen or methyl, and R8ais C5-36alkyl, andan hydrophilic acrylate monomer of the formula (IIb) H2C=C(R7)COOR8b(IIb), where R7is hydrogen or methyl, and R8bis C1-4alkyl. 6. The comb copolymer according to any of claims 1 to 5 comprising 5 - 60 wt% of the PIB macromonomer. 7. The comb copolymer according to any of claims 1 to 6 comprising 25 - 90 wt% of the acrylate monomer. 8. The comb copolymer according to claims 5 or 6 comprising – up to 75 wt% of the hydrophobic acrylate monomer and at least 5 wt% of the hydrophilic acrylate monomer. 9. The comb copolymer according to claims 5 or 6 comprising - 5 - 55 wt% PIB macromonomer, - 10 - 85 wt% hydrophobic acrylate monomer, and - 1 - 50 wt% hydrophilic acrylate monomer, where the sum of all monomers is 100 wt%. 10. A method of preparing the PIB macromonomer of the formula (I)where R1to R5are selected -independently from each other- from the group comprising hydrogen, C1-C20-alkyl, C1-C20-alkyloxy und C8-C7500-polyisobutyl und C8-C7500- polyisobutenyl, where at least one of R1to R5is a C8-C7500-polyisobutyl or C8-C7500- polyiso-butenyl group, and R6is hydrogen or methyl, where a polyisobutene phenol of the formula (III)is reacted with (meth)acrylic acid anhydride. 11. The method according to claim 10 where the (meth)acrylic acid anhydride is present in a molar excess in relation to the polyisobutene phenol. 12. The method according to claim 10 or 11 where the reaction is followed by hydrolysis of the remaining (meth)acrylic acid anhydride to form (meth)acrylic acid. 13. The method according to claim 12 where the (meth)acrylic acid is removed by distillation or by extraction with water. 14. A lubricant comprising (i) a base oil, (ii) the comb copolymer according to any of claims 1 to 9 or obtainable by the method according to any of claims 10 to 13, and (iii) further lubricant additives. 15. A use of the comb copolymer according to any of claims 1 to 9 or obtainable by the method according to any of claims 10 to 13 for improving the viscosity index of a lubricating oil.