Cold hardening binding agent for particulate solids, such as molding sand, containing a nitrogen basic polyol

US4273910A · kind A · utility

Assignee

• Woellner-Werke · DE

Inventor

• Gernot Lederer · Mettmann, DE

Key dates

• Filing date: Mar 19, 1980
• Grant date: Jun 16, 1981
• Expiry date: Mar 19, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/5021
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A cold hardening binding agent for binding particulate solid materials is based on a mixture of a polyhydroxy compound and a polyisocyanate, and the polyhydroxy compound consists at least in part of a nitrogen basic polyol. The nitrogen basic polyol accelerates reaction and hardening time. An alkali or alkaline earth metal acetate or formate may also be employed to accelerate hardening.