Mould release composition for concrete - is oil-in-water...

B - Operations – Transporting – 28 – B

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B28B 7/38 (2006.01) B29C 33/60 (2006.01)

Patent

CA 2091968

A biodegradable oil and water emulsion release composition for facilitating the unmoulding of hydraulic bonding material comprises as the oil component an ester of a hindered polyhydric alcohol having no hydrogen atoms attached to any carbon atom in a beta-position to any hydroxyl group and a straight or branched chain, saturated or unsaturated C4-C24 monocarboxylic acid. The ester may be partial and the partial ester may he alkoxylated. In a preferred embodiment also a straight or branched chain, saturated or unsaturated C8-C24 monohydric alcohol is present. Also a method of unmoulding has been described.

Une composition de démoulage en émulsion huile-eau biodégradable pour faciliter le démoulage de matières à liaison hydraulique comprend comme constituant huileux un ester d'un alcool polyhydrique encombré n'ayant aucun atome d'hydrogène lié à un quelconque atome de carbone en position bêta par rapport à un groupe hydroxyle, ainsi qu'un acide monocarboxylique en C4-C24 à chaîne linéaire ou ramifiée, saturé ou insaturé. L'ester peut être partiel et l'ester partiel peut être alcoxylé. Dans une application de choix, un alcool monohydrique en C8-C24 à chaîne linéaire ou ramifiée, saturé ou insaturé est également présent. Une méthode de démoulage est également décrite.

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