Patent · US Expired

Polyurethane based binder system for the manufacture of foundry cores and molds

US6772820B2 · kind B2 · utility

8Cited by

8References

5Claims

0Family size

Assignee

Ashland, Inc. · US

Inventors

Jean-Claude Roze · Gaillon, FR
Gunther Weicker · Solingen, DE
Diether Koch · Mettmann, DE
Andreas Werner · Königstein, DE

Key dates

Filing date	Jun 26, 2003
Grant date	Aug 10, 2004
Priority date	—
Expiry date	Jun 26, 2023

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22C1/2273
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A cold-box process for preparing a foundry shape, e.g. mold or core, that uses a binder comprising a phenolic resin component and an isocyanate component, wherein the phenolic resin component comprises (a) an alkoxy-modified phenolic resole resin and (b) an oxygen-rich polar, organic solvent component, which contains a fatty acid ester.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.