Nitrogen-containing esters and lubricants containing them
US4604221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1985 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Apr 3, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A nitrogen-containing ester of a carboxy-containing interpolymer which is particularly useful as a pour point depressant is disclosed. The interpolymer has a reduced specific viscosity of from about 0.05 to about 1 and is derived from at least two monomers, one of said monomers being a low molecular weight aliphatic olefin or styrene and the other of said monomers being an alpha, beta-unsaturated aliphatic acid, anhydride or ester thereof. The nitrogen-containing ester is substantially free of titratable acidity and is characterized by the presence within its polymeric structure of at least one of each of the following groups which are derived from the carboxy groups of said interpolymer: PA0 (A) a carboxylic ester group, said carboxylic ester group having at least eight aliphatic carbon atoms in the ester radical, and PA0 (B) a carbonyl-polyamino group derived from a polyamino compound having one primary or secondary amino group and at least one monofunctional amino group, wherein the molar ratio of carboxy groups of said interpolymer esterified to provide (A) to carboxy groups of said interpolymer neutralized to provide (B) is in the range of about 85:15 to about 99:1. Lubricant …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.