Additives for lubricating oils containing styrene and heavy C.sub.12 -C.sub .
US4496691A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1982 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Jan 8, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2217/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to additives for lubricating oils, constituted by a copolymer prepared from 35-55%, and preferably 40-50%, of substituted or non-substituted styrene monomers, and from 65-45%, and preferably 60-50% of heavy C.sub.12 -C.sub.20 alkyl esters of methacrylic acid, of which at least 80% consist of C.sub.16 -C.sub.20 alkylmethacrylates, said copolymer having a polydispersity which is as low as possible, a parameter of solubility close to that of the oil for which the additives are intended and a molecular weight of between 80,000 and 200,000 and being able, moreover, to be modified by a comonomer and vinyl compounds. One application of the invention is the formulation of lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.