Reactive amine catalysts for polyurethane applications

US11208519B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Juan Jesus Burdeniuc · Macungie, US
• Torsten Panitzsch · Henstedt-Ulzburg, DE
• Kai Xi · Readington, US
• Renee Jo Keller · Orwigsburg, US

Key dates

• Filing date: Oct 15, 2018
• Grant date: Dec 28, 2021
• Expiry date: Oct 15, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Tertiary amine catalysts having isocyanate reactive groups that are capable of forming thermally stable covalent bonds able to withstand temperatures up to 120° C. are disclosed. These catalyst can be used to produce polyurethane foam having the following desirable characteristics: a) very low chemical emissions over a wide range of environmental conditions and isocyanate indexes (e.g., indexes as low as 65 but higher than 60) while meeting all physical property requirements; b) sufficient hydrolytic stability to maintain the catalyst covalently bound to foam without leaching of tertiary amine catalyst when foam is exposed to water or aqueous solutions even at temperatures higher than ambient (temperature range 25° C. to 90° C.); and c) stable contact interface between the polyurethane polymer and other polymers (for example polycarbonate) with minimal migration of tertiary amine catalyst from polyurethane polymer to other polymers yielding no noticeable polymer deterioration at the point of contact even under conditions of heat and humidity.