Rheological additive based on optionally biosourced 1,5-pentamethylenediamine
US12240795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2019 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | May 21, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/014
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a rheology additive, according to which A) said additive consists of: a) at least one symmetrical fatty diamide of formula (I): (AGH)-CONH-(PMDA)-NHCO-(AGH) (I) with: (AGH): hydroxylated fatty acid residue R1CO2H, without —CO2H group, with R1 of C18 to C20 comprising a hydroxyl group, —NHCO— or —CONH—: amide group, —(PMDA): residue without amine groups of 1,5-pentamethylenediamine; or alternatively according to which: B) said additive comprises: a) at least one symmetrical fatty diamide as defined above according to formula (I) and, in addition, b) at least one other symmetrical fatty diamide of formula (II): (AGH)-CONH-(R)-NHCO-(AGH) (II) with (AGH), —NHCO— and —CONH— having the same definition as that above in said formula (I), and (R) being the residue without amine groups of a diamine, other than (PMDA), chosen from a cycloaliphatic, aliphatic or aromatic diamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.