Matrix materials and a process for their preparation

US4659797A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wulf von Bonin · Leverkusen, DE
• Johannes Blahak · Munich, DE
• Ulrich von Gizycki · Leverkusen, DE
• Lothar Preis · Bensberg, DE

Key dates

• Filing date: Apr 2, 1986
• Grant date: Apr 21, 1987
• Expiry date: Apr 2, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethane-based matrix materials are made by reacting a phenol which is at least bifunctional with an aromatic isocyanate which is at least difunctional in the presence of 1-40 wt. % soft segment former. The soft segment former is a compound containing long chain aliphatic groups having at least six carbon atoms in the aliphatic group, an isocyanate-reactive group and a molecular weight of from 800 to 10,000. From 90 to 130 equivalent percent of isocyanate groups (based on the total of isocyanate-reactive groups present in the phenol and soft segment former) are employed. These matrix materials are particularly useful in the production of composite materials and as adhesives.