Imperial Chemical Industries Limited

S. A. Eternit

Jean P Mercier

Roger M Legras

Eric Nield

Pierre Godard

Jacques J Devaux

Marc Della Faille

Jean-Jacques E Biebuyck

Pierre Delvaux

Daniel J Daoust

A crystallizable thermoplastic aromatic polyetherketone, the polymeric chain of which contains the repeat unit

Aromatic polyetherketones

Fast crystallizing polyester compositions obtained by reacting a polyester which comprises aromatic or cycloaliphatic residues obtained from diacids and/or hydroxyacids and aliphatic, aromatic or cycloaliphatic residues of diols with an ionizable metal salt of an organic compound having at least one acidic proton using sufficient of the ionizable metal salt to result in at least 4% of the end groups of the polyester being converted to carboxylate end groups but insufficient to result in the melt degradation performance of the polyester determined as hereinafter described being substantially inferior to that of the polyester in the absence of the salt. Preferred compositions contain a polyester comprising at least 90 mole % of ethylene terephthalate units and metal salts of substituted benzoic acids.

Fast crystallizing polyester compositions

A method for processing porous materials with at least one water-insoluble polymerizable compound and the products obtained, said method comprising the following steps in successive order: impregnating a porous material, especially one consisting essentially of a hydraulic binder and a granular or fibrous filler, with said compound; fully covering the thus impregnated material with an aqueous solution of a salt which precipitates when contacted with the hydraulic binder; and polymerizing the compound in the impregnated material while covered with the saline solution.

Process for treating porous materials and products obtained

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Kessel-lo, Belgium

Jean P Mercier