Production of chlorofluorocarbon-free urethane-containing soft-elastic moldings having a cellular core and a compacted peripheral zone

US5110834A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Horn · Heidelberg, DE
• Wolfgang Hoelderich · Bischofswerda, DE
• Rudolf Taddey · Damme, DE
• Dieter Tintelnot · Diepholz, DE

Key dates

• Filing date: Oct 3, 1991
• Grant date: May 5, 1992
• Expiry date: Oct 3, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/15
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Chlorofluorocarbon-free urethane-containing, soft-elastic moldings having a cellular core, a compacted peripheral zone and an essentially pore-free smooth surface are produced by reacting PA1 a) an organic and/or modified organic polyisocyanate with PA1 b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and, if desired, PA1 c) a low-molecular-weight chain extender and/or crosslinking agent, in the presence of PA1 d) a blowing agent, PA1 e) a catalyst, PA1 f) a crystalline, microporous molecular sieve having a cavity diameter of less than 1.3 nm and comprising metal oxides or metal phosphates, and, if desired, further additives and PA1 g) assistants, in a closed mold with compaction, expediently by RIM.