Recycling of cured aminoplast resins

US5356938A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Weiser · Schriesheim, DE
• Wolfgang Reuther · Neckargemünd, DE
• Erwin Hahn · Heidelberg, DE

Key dates

• Filing date: Feb 15, 1994
• Grant date: Oct 18, 1994
• Expiry date: Feb 15, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/4935
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Cured aminoplast resins are recycled by a process in which said resins, which may contain fillers, are treated with an aqueous sulfite, hydrogen sulfite or disulfite solution and the resulting low molecular weight degradation products are used in chemical processes. The resulting low molecular weight degradation products of cured aminoplast resins are used for coating moldings, for tanning leather and skins and for the production of moldings which contain cured aminoplast resins or consist thereof.