Multifunctional additive for lubrificating oils and process for the preparation thereof
US4618439A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 10, 1985 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Jun 10, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2221/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Multifunctional additive for lubricating oils consisting of a base copolymer and of monomers grafted to said base copolymer; PA0 said base copolymer being the product of copolymerization of at least an alkyl metacrylate containing from 1 to 4 carbon atoms in its alkyl group, with at least an alkyl metacrylate containing from 10 to 18 carbon atoms in its alkyl group; PA0 said graft monomers comprising at least a member selected from the class consisting of N-vinylimidazoles, N-vinylpyrrolidones, vinylpyridines and N,N-dialkylaminoethyl-metacrylates; and at least a member selected in the class of compounds definable by means of the general formula: EQU CH.sub.3 O EQU CH.sub.2 .dbd.C--C--[O--CH.sub.2 CH.sub.2 ].sub.n --NHR PA0 wherein: PA0 n is 0 or 1; PA0 R is a group selected from: ##STR1## (R', R" and R'" being alkyl groups of from 1 to 18 carbon atoms). The process for the production of such an additive comprises a first reaction step wherein at least one alkyl metacrylate containing from 1 to 4 carbon atoms in its alkyl group is partly or fully copolymerized with at least an alkyl metacrylate containing from 10 to 18 carbon atoms in its alkyl group; followed by a second reaction …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.