Succinimide derivatives and processes for their preparation
First Claim
1. A product suitable as an oil dispersant additive which product is prepared by a process which comprises:
- step (1) reacting compound (A), wherein compound (A) is a hydrocarbyl-substituted or a substituted hydrocarbyl-substituted succinic acid or anhydride or ester thereof, with compound B of formula (I)
space="preserve" listing-type="equation">H.sub.2 N(CHR.sup.1 CHR.sup.2 O).sub.n CHR.sup.3 CHR.sup.4 NH.sub.2(I) wherein one of R1 and R2 is hydrogen and the other is hydrogen or a lower alkyl group, n is an integer from 1 to 10, and one of R3 and R4 is hydrogen and the other is hydrogen or a lower alkyl group, each of the --(CHR1 CHR2 O)-- units being independently defined, to give a product (C) andstep (2) reacting product (C) with a diisocyanate (D) of formula (II)
space="preserve" listing-type="equation">OCN--R.sup.5 --NCO (II) wherein R5 is a divalent hydrocarbyl group.
0 Assignments
0 Petitions
Accused Products
Abstract
A process for producing a lubricating oil dispersant additive comprises:
step (1) reacting compound (A), wherein compound (A) is a hydrocarbyl-substituted or a substituted hydrocarbyl-substituted succinic acid or anhydride or ester thereof, with compound (B) of formula (I)
H.sub.2 N(CHR.sup.1 CHR.sup.2 O).sub.n CHR.sup.3 CHR.sup.4 NH.sub.2(I)
wherein one of R1 and R2 is hydrogen and the other is hydrogen or a lower alkyl group and n is an integer from 1 to 10 and one of R3 and R4 is hydrogen and the other is hydrogen or a lower alkyl group, each of the --(CHR1 CHR2 O)-- units being independently defined, to give a product (C) and
step (2) reacting product (C) with a diisocyanate (D) of formula (II)
OCN--R.sup.5 --NCO (II)
wherein R5 is a divalent organic group. Novel succinimides have been prepared by the disclosed process, lubricating oil compositions comprise 1-20% w/w of the modified succinimides. The succinimides have dispersancy and VI improver properties.
-
Citations
11 Claims
-
1. A product suitable as an oil dispersant additive which product is prepared by a process which comprises:
-
step (1) reacting compound (A), wherein compound (A) is a hydrocarbyl-substituted or a substituted hydrocarbyl-substituted succinic acid or anhydride or ester thereof, with compound B of formula (I)
space="preserve" listing-type="equation">H.sub.2 N(CHR.sup.1 CHR.sup.2 O).sub.n CHR.sup.3 CHR.sup.4 NH.sub.2(I)wherein one of R1 and R2 is hydrogen and the other is hydrogen or a lower alkyl group, n is an integer from 1 to 10, and one of R3 and R4 is hydrogen and the other is hydrogen or a lower alkyl group, each of the --(CHR1 CHR2 O)-- units being independently defined, to give a product (C) and step (2) reacting product (C) with a diisocyanate (D) of formula (II)
space="preserve" listing-type="equation">OCN--R.sup.5 --NCO (II)wherein R5 is a divalent hydrocarbyl group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification