Production of chlorofluorocarbon-free, urethane-containing moldings having a cellular core and an integral skin

US5731361A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Horn · Heidelberg, DE
• Walter Denzinger · Speyer, DE
• Harald Fuchs · Eisenberg (Pfalz), DE
• Ralf Bohme · Ludwigshafen, DE

Key dates

• Filing date: Sep 18, 1995
• Grant date: Mar 24, 1998
• Expiry date: Sep 18, 2015

Classification

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

Abstract

Chlorofluorocarbon-free, urethane-containing moldings having a cellular core and an integral skin with an essentially pore-free surface, ie. polyurethane (PU) integral foams, are produced by reacting the conventional starting components in the presence of blowing agents, catalysts and at least one additive selected from the group consisting of the partially or completely neutralized PA1 (1) homopolymers of monoethylenically unsaturated monocarboxylic acids, dicarboxylic acids or the internal anhydrides thereof, PA1 (2) copolymers of PA2 (2i) monoethylenically unsaturated monocarboxylic acids, dicarboxylic acids or the internal anhydrides thereof and PA2 (2ii) carboxyl-free, monoethylenically unsaturated monomers copolymerizable with (2i) and PA1 (3) copolymers or graft copolymers of PA2 (3i) monoethylenically unsaturated monocarboxylic acids and/or their salts, PA2 (3ii) monoethylenically unsaturated dicarboxylic acids, their salts and/or their internal anhydrides and PA2 (3iii) if required, carboxyl-free, monoethylenically unsaturated monomers copolymerizable with (3i) and (3ii) in a closed mold with compaction.