Embedding material and process for the production thereof

US4598136A · kind A · utility

Assignee

• Akzo N.V. · NL

Inventor

• Gerhard Wick · Obernburg, DE

Key dates

• Filing date: Mar 26, 1985
• Grant date: Jul 1, 1986
• Expiry date: Mar 26, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/8051
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aliphatic embedding masses are disclosed, prepared by initially reacting one or more aliphatic diisocyanates with castor oil or a mixture of castor oil and further hydroxyl compounds, such as e.g., trimethylol propane into a NCO-group-displaying pre-adduct, and the pre-adduct is then hardened in a catalyzed reaction with a mixture containing castor oil, trimethylol propane and N-methyldiethanol amine. Preferably iron acetyl acetonate, dibutyl tin diacetate or titanium tetrabutylate are employed as catalysts. Isophoron diisocyanate is particularly suitable as diisocyanate. The embedding masses are useful for the embedding of membranes, preferably membranes to be employed in medical fields. The embedding masses are bio-compatible, especially with regard to blood, and are non-toxic. They allow for the embedding of membranes with the aid of automatic machinery. The embedding masses display no or only negligible swelling when used in contact with blood, blood-like and aqueous systems.