Process for the preparation of polyurea elastomers containing urethane groups

US5238973A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Eduard Mayer · Dormagen, DE
• Manfred Schmidt · Krefeld, DE
• Hans-Joachim Meiners · Leverkusen, DE
• Andreas Ruckes · Leverkusen, DE

Key dates

• Filing date: May 1, 1992
• Grant date: Aug 24, 1993
• Expiry date: May 1, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2120/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of optionally cellular elastic moldings by the reaction injection molding technique in closed molds, in which isocyanate prepolymers A) based on PA0 a) polyisocyanates of the diphenylmethane series and PA0 b) polyether polyols having a maximum hydroxyl functionality of 2.4 are reacted with a reactive component B) consisting essentially of aromatic, alkyl-substituted diamines, optionally with the addition of auxiliary agents and additives d).