Homogeneous, flexible block copolyetheramide having oxyalkylene units
US4740582A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Mar 28, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel, homogeneous and flexible block copolyetheramides, having a melting point of at least 150.degree. C., a glass transition temperature not exceeding -5.degree. C. and a melt viscosity of at least 100 poises, are preferably prepared by prepolymerizing a mixture of a salt of a short-chain aliphatic dicarboxylic acid and a short-chain aliphatic diamine with a fatty acid(s) dimer or amino derivative thereof, and then polycondensing the prepolymer in the presence of a strong organic or inorganic oxyacid, with a polyoxyalkylenediamine or a polyoxyalkylenedicarboxylic acid having a number-average molecular weight ranging from 300 to 1200.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.