Basf Wyandotte Corporation

Harald P Wulff

Thirumurti L Narayan

Moses Cenker

John T Patton, Jr

Gerhard Fahrbach

Georg Falkenstein

Stable, liquid polyisocyanate compositions are prepared by reacting a polyisocyanate or a mixture of polyisocyanates and halogen-containing carboxylic acids. The polyisocyanates hereof are used to prepare polyurethanes, polyisocyanurates, poly(isocyanurate-urethane) and the like. These isocyanates can be used in foam formation, films, fibers, coating solutions, elastomers and the like.

Cellular products based on halocarboxylic acid-modified polyisocyanates

Rigid foams characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting compound and (b) certain C.sub.1 -C.sub.8 alkali metal carboxylates as trimerization catalysts.

Process for the preparation of carbodiimide-isocyanurate foams

The incorporation of chloro-alkanol moieties into a urethane-modified isocyanurate foam has been found to improve the insulating properties of the foam as well as improve the flame-retardant properties thereof.

Urethane-modified isocyanurate foams having improved insulating and

A process for the manufacture of urethane group containing polyisocyanurate foams produced by mixing polyisocyanates and polyols and (if required) frothing agents, auxiliaries and additives in the presence of a co-catalyst system which consists of a 1,3,5-tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazine and an organic mono- or polycarboxylic acid, a polyesterol with an acid number greater than 4 or a mono-ester of polycarboxylic acid.

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Baton Rouge, LA, United States of America

Harald P Wulff