Carbon black useful for pigment for black lacquers

US4366138A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Edith Eisenmenger · Offenbach, DE
• Richard Engel · Jacksonville, US
• Gerhard Kuhner · Hanau, DE
• Reinhold Reck · Maintal, DE
• Hans Schaefer · Hanau, DE
• Manfred Voll · Hanau, DE

Key dates

• Filing date: Jun 1, 1981
• Grant date: Dec 28, 1982
• Expiry date: Jun 1, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/19
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An oxidized carbon black (gas black) is prepared within the MCC (medium color channel black) area showing primary particle sizes of an average diameter of 16 to 18 nm and a content of volatiles of at least 15% which, as secondary characteristics, has a specific surface area (BET) of 300 to 420 m.sup.2 /g, an oil absorption (stiff paste) conducted on carbon black powder of 430 to 560 g/100 g, an oil absorption (stiff paste) conducted on carbon black beads of 370 to 450 g/100 g, a pH value of 2 to 5, a nigrometer index of 68 to 72 and a maximum content of volatiles of 25%. The carbon black is used as a pigment in high jet black lacquers.