High density information records made of conductive resin compositions comprising inorganic power stabilizers
US4639908A · kind A · utility
0Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1984 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Dec 7, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/014
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High density information records made of vinyl chloride resin compositions which comprise conductive powder and inorganic compounds in the form of powder having an antacidic action and a predetermined average size. By this, dropout defects in the information record can be suppressed to a significant extent. The inorganic compounds are selected from calcium hydroxide, basic aluminum magnesium carbonate hydrate and hydrotalcite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.