Polyurethane resin binder for magnetic recording mediums comprising a polycarbonate polyol
US5124424A · kind A · utility
15Cited by
1References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Apr 26, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/755
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A binder for a magnetic recording medium comprising a hydroxy-group-terminated polyurethane resin prepared by reaction of a polycarbonate-polyol, a chain-extender, and an organic diisocyanate; (A) said polycarbonate-polyol comprising poly(cyclohexane-1,4-dimethanol carbonate)-polyol as a constituting component in an amount of from 20 to 80% by weight, and (B) said chain-extender being a compound having a molecular weight of not more than 1,000 and having two or more amino or hydroxyl groups in the molecule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.