Polyurethane compositions with a low content of monomeric diisocyanates

US5880167A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Michael Krebs · Hilden, DE
• Gerd Bolte · Monheim, DE
• Christa Dernst-Mentges · Leimen, DE
• Guenter Henke · Neuss, DE
• Wolfgang Klauck · Meerbusch, DE
• Hermann Kluth · Goldkronach, DE
• Manfred Schumann · Heidelberg, DE

Key dates

• Filing date: Mar 27, 1997
• Grant date: Mar 9, 1999
• Expiry date: Mar 27, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to polyurethane compositions with a low content of monomeric diisocyanates. Trifunctional isocyanates optionally reduced in their functionality to 3.0.+-.0.7 with a monofunctional terminator are preferably used for this purpose. In this way, the compositions contain considerably smaller quantities of readily volatile isocyanates. The compositions are suitable for use as reactive hotmelt adhesives, lamination adhesives, adhesive/sealing compounds, primers and for the production of foam plastics from non-reusable pressurized containers (aerosol cans). The low content of volatile monomeric diisocyanates enables the need for safety measures in the workplace to be significantly reduced, in addition to which the disposal of residues remaining in the containers is made considerably easier.