Imperial Chemical Industries Limited

William G Carroll

James P Brown

James M Bentley

David J Sparrow

Ronald N May

Ian D Rosbotham

Erik M Merckx

A polyester polyol derived from a polyalkoxylated by-product of pentaerythritol manufacture and polycarboxylic acids, the latter being themselves by-products from the production of adipic acid or terephthalic acid or derivatives thereof, useful for the manufacture of rigid foam.

Polyester polyols prepared by reacting a polyhydric alkoxylated

A polyether polyol having an average hydroxyl value in the range 400 to 650 mgKOH/g which is a alkoxylated derivative of a polyhydric alcohol being itself a single compound or a mixture of compounds according to the general formula (I) ##STR1## where R.sup.1 is --H, --CH.sub.3 or OCH.sub.3

Polyether polyols containing hydroxymethyl substituted 1,3-dioxane for

A mixture of polyols useful in preparing closed cell rigid foams. The polyols are made by blending a polyester polyol derived from succinic, glutaric and adipic acids and a non-polymeric or polyoxyalkylene polyol having a functionality from 3 to 4. When reacted with an organic polyisocyanates, the resulting rigid polyurethane foams are dimensionally stable and less flammable compared with polyether-based products.

Polyol compositions and polyurethane foams manufactured therefrom

Polymer-modified polyols of reduced viscosity are made by reacting an organic polyisocyanate with a low molecular weight hydroxyl-containing compound in a polyol in the presence of a specified dispersant. The dispersant, which is of a type known for dispersing pigments in paints, is obtained by reacting

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Vossem, Belgium

William G Carroll