润滑科技信息平台

专利摘要

本发明涉及一种梳形共聚物,其包含聚合形式的至多40重量%的式(I)的PIB大分子单体和式(II)的疏水单体。本发明还涉及式(I)的PIB大分子单体的制备方法,其中式(IV)的聚异丁烯胺与(甲基)丙烯酸酐反应; 以及包含基础油、梳形共聚物和另外的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:
EP2022822987
申请日期:
2022-11-29
专利申请人:
巴斯夫欧洲公司
分类号:
["C10M149/06","C08F290/04","C10N20/02","C10N30/02"]
发明/设计人:
GARCIA CASTRO, IVETTE ， KOSCHABEK, RENE ， MISSKE, ANDREA ， FLECKENSTEIN, CHRISTOPH
权利要求: 23Claims1. A comb copolymer comprising in polymerized form(A) up to 40 wt% of a PI B macromonomer of the formula (I)where R1is H or methyl, and n is a number from 5 to 100 , and(B) a hydrophobic monomer of the formula (II) H2C=C(R1)COOR2(II) where R1is H or methyl, and R2is C5-36 alkyl.2. The comb copolymer according to claim 1 where R2is hexyl, heptyl, octyl, 2-ethylhexyl, 2-propyl heptyl, 2-butyloctyl, nonyl, decyl, stearyl, lauryl, octadecyl, heptadecyl, 2- hexyldecyl, nonadecyl, eicosyl, henicosyl, docosyl, or mixtures thereof.3. The comb copolymer according to claim 1 or 2 where R2is a mixture of at least two residues selected from the group consisting of hexyl, heptyl, octyl, 2-ethylhexyl, 2- propyl heptyl, 2-butyloctyl, nonyl, decyl, stearyl, lauryl, octadecyl, heptadecyl, 2- hexyldecyl, and nonadecyl.4. The comb copolymer according to any of claims 1 to 3 further comprising a hydrophilic monomer of the formula (III)H2C=C(R1)COOR3(III) where R3is C1.4 alkyl.5. The comb copolymer according to any of claims 1 to 4 comprising 5 - 30 wt% PIB macromonomer.6. The comb copolymer according to any of claims 1 to 5 comprising at least 30 wt% hydrophobic monomer.The comb copolymer according to any of claims 1 to 6 comprising 40 - 90 wt% hydrophobic monomer. The comb copolymer according to any of claims 1 to 7 comprising 1 - 25 wt% hydrophilic monomer. The comb copolymer according to any of claims 1 to 8 comprising5 - 30 wt% PIB macromonomer,50 - 90 wt% hydrophobic monomer, and1 - 25 wt% hydrophilic monomer, where the sum of all monomers is 100 wt%. A method of preparing the PIB macromonomer of the formula (I)where R1is H or methyl, and n is a number from 5 to 100 , where a polyisobutene amine of the formula (IV)is reacted with (meth)acrylic acid anhydride. The method according to claim 10 where the (meth)acrylic acid anhydride is present in a molar excess in relation to the polyisobutene amine. 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. The method according to claim 12 where the (meth)acrylic acid is removed by distillation or by extraction with water. A lubricant comprising(i) a base oil,(ii) the comb copolymer according to any of claims 1 to 9, and(iii) further lubricant additives. A use of the comb copolymer according to any of claims 1 to 9 for improving the viscosity index of a lubricating oil.