Ceca S.a.

Societe Nationale Elf Aquitaine

Luc E Navascues

Paul Maldonado

Gilles Barreto

Gilles Meunier

Rene L Brouard

Lionel Grampre

Denis Lopez

Jean-Claude Fabre

Pascal Cheneviere

Coating is carried out with the aid of an emulsion which consists of the mixture of a fast-breaking emulsion and a slow-breaking emulsion. It is advantageous to take a soft bitumen emulsion as fast emulsion and a hard bitumen emulsion as slow emulsion.

Process for the preparation of dense bituminous mixes with emulsion, and

Film-forming bitumen-in-water mixed emulsions comprising intimate immixture of (i) an oil-in-water emulsion of a hard bituminous material and (ii) an oil-in-water emulsion of a soft bituminous material, are well suited for the production of storage-stable coated particulates, notably cold dense building and paving materials such as aggregate and gravel, useful for the construction of, e.g., road and highway surfaces via compaction thereof.

Paving composition/building composition including a film forming bitumen

Compositions for the treatment of granular fertilizers containing secondary C.sub.14 -C.sub.20 dialkyl monoamines or their mixture with primary monoamines which are also C.sub.14 -C.sub.20 have the advantage of limiting both the solidification and the secondary production of dust on storage. The process is particularly advantageous in the treatment of NPK-type fertilizers.

Granular fertilizers

Cation-active compositions and their application to bituminous emulsions

Polymer compounds resulting from the condensation of polyacrylic acids having a molecular weight comprised between 10,000 and 2,000,000 and alkylamines containing at least 12 carbon atoms in their chain. These products constitute paraffin deposit inhibitors and pour point depressants for crude petroleum oils.

Novel n-substituted polyamide type polymers, their method of preparation

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Paris, France

Luc E Navascues