Cement retarder and cement retardative sheet
AssigneeDaicel-Huels Ltd.
InventorsYoshiyuki Ikemoto, Toru Ikuta
Life of this patent
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Abstract
A saturated polyester obtained by a reaction of a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain (e.g. maleic anhydride), and a polyol component comprising a polyhydric alcohol having 2 to 4 carbon atoms or its condensate is used as a cement retarder. A retardative sheet can be formed by applying or impregnating a composition comprising the retarder and a tacky adhesive to a base sheet. By forming a predetermined pattern with the use of the retarder or sheet in a form, depositing a mortar composition, washing a surface of the hardened concrete, and washing out uncured mortar, a figure or a washing finished surface is formed on a surface of a concrete product.
Claims19
A cement retarder which comprises a saturated polyester comprising a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain or its derivative, and a polyol component containing a polyhydric alcohol having 2 to 4 carbon atoms or its condensate.
A cement retarder which comprises a saturated polyester comprising a dicarboxylic acid component comprising a saturated aliphatic dicarboxylic acid having 2 to 6 carbon atoms or its derivative in the main chain, and a diol component comprising a diol having 2 to 4 carbon atoms or its condensate, and said polyester having a repeating unit containing 4 to 9 carbon atoms as a main repeating unit.
A cement retardative sheet which comprises a base sheet and a composition held or supported by the base sheet, which said composition comprises a cement retarder composed of a saturated polyester comprising a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain or its derivative, and a polyol component containing a polyhydric alcohol having 2 to 4 carbon atoms or its condensate.
Dependencies are inferred from the claim text.