Imperial Chemical Industries Limited

David Thorpe

Giovanni Parrinello

Gabriel Verhelst

Mireille B De Witte

Julian Francis Hopper

Rik De Vos

Steve Carter

Gonda Van Essche

Process for recycling flexible foams by glycolysis and extraction. The glycolysis is conducted by allowing the foam to react with low molecular weight polyols, then allowing the mixture to separate in two phases.

Recycling of flexible foam

Process for the preparation of rigid polyurethane foam by reaction of a polyfunctional isocyanate-reactive composition with a polyisocyanate composition comprising the reaction product of a stoichiometric excess of an organic polyisocyanate and a substantially fluorinated isocyanate-reactive compound, optionally in the presence of an inert, insoluble fluorinated compound.

Process for rigid foams

The level of unsaturation in certain polyols can be reduced by extraction with certain low molecular weight polyols like ethylene glycol.

Process for reducing unsaturation on polyols

Compound having the formula ##STR1## wherein X is the residue of a polyoxyalkylene diamine or triamine having an average equivalent weight of at least 500, after having deleted the two or three amine groups,

Prepolymers containing imide linkages

New Mannich bases of the formula ##STR1## wherein each of R.sup.1 and R.sup.2, independently, represents a hydroxyalkyl radical, and to oxyalkylation derivatives of the formula ##STR2## wherein each of a, b and c represents zero or a positive integer, their sum being in the range from 3 to 8, and wherein each A radical represents independently a propylene or ethylene radical. The compounds according to the invention are useful for the manufacture of rigid polyurethane foams.

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Erps-Kwerps, Belgium

David Thorpe