Basf Aktiengesellschaft

Walter Mann

Peter Horn

Gunnar Schornick

Matthias Marx

Walter Heckmann

Anton Hesse

Wolfram Frank

Gunther Schulz

Carboxylates of hydroxyl-containing polymers are prepared by reacting a finely dispersed hydroxyl-containing polymer with a carboxylic anhydride in the heterogeneous phase in the presence of a tertiary amine as a catalyst by a method in which an N-alkylimidazole, where alkyl is of 1 to 10 carbon atoms, is used as the catalyst.

Preparation of carboxylates of hydroxyl-containing polymers

Crystallite suspensions containing from 3 to 70 weight percent of a crystalline, ethylenically unsaturated polyester prepared through condensation polymerization, and having a molecular weight factor per double bond of 154.4 to 408, as the dispersed phase, and from 30 to 97 weight percent of a polyhydroxyl compound having a functionality of from 2 to about 8, a hydroxyl number of from 20 to 800, and a melting point of less than 30.degree. C. as the coherent phase are suitable for preparing non-cellular and cellular polyurethane- or polyurethane group-containing polyisocyanurate foams.

Polyisocyanurate/polyurethane elastomers based on suspensions of

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Frankenthal, Germany

Walter Mann