Process for producing low-emission polyurethane moldings and composite bodies and their use

US5760098A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Haas · Brisbane, AU
• Ulrich Liman · Monheim, DE

Key dates

• Filing date: Jul 31, 1996
• Grant date: Jun 2, 1998
• Expiry date: Jul 31, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31583
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is described for producing polyurethane moldings by the reaction of compounds of molecular weight 400 to 10,000 which contain at least 2 hydrogen atoms capable of reacting with isocyanates, and optionally chain extenders of molecular weight 32 to 399, with polyisocyanates, optionally in the presence of foaming agents, auxiliary materials and additives, in which defined carbamates are used as activators. The polyurethanes obtained by this process are particularly low in emissions, i.e. are stable in relation to diffusion and exhibit low fogging, and are thus particularly suitable for the production of composite bodies comprising a polyurethane core and at least one further plastic material as an outer layer. Also described is the use of these moldings and composite bodies which are stable in relation to diffusion and which cause low fogging, e.g. as dashboards or door trims in the construction of vehicles, furniture, machines or apparatus.