Process for producing molded particulate articles utilizing a self-releasing binder based on a sulfonic acid modified isocyanate

US4528153A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Joachim Scholl · Cologne, DE
• Hanns I. Sachs · Cologne, DE
• Gert Jabs
• Gunther Loew

Key dates

• Filing date: Sep 20, 1982
• Grant date: Jul 9, 1985
• Expiry date: Sep 20, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2125/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a substantially anhydrous binder having a self-releasing effect for the production of pressed articles comprising: PA0 (A) a polyisocyanate; and PA0 (B) a sulfonic acid corresponding to the general formula: EQU R--SO.sub.3 H).sub.n PA0 wherein PA1 n represents an integer of 1 or 2; PA1 R represents an aromatic hydrocarbon radical having from 6 to 14 carbon atoms, an aliphatic hydrocarbon radical having from 10 to 18 carbon atoms, a cycloaliphatic hydrocarbon radical having from 6 to 15 carbon atoms, an araliphatic hydrocarbon radical having from 7 to 15 carbon atoms or an alkaromatic hydrocarbon radical having from 7 to 24 carbon atoms; and PA0 the equivalent ratio of the components (A) and (B) is 100:0.5 to 100:20. The invention is also directed to the use of such binders in the production of shaped articles by the hot pressing of a wide variety of organic and/or inorganic materials.