Setting-retarder and its application to concrete, mortars and/or grouts
AssigneeAxim
InventorsAlain Blanc, Catherine Fontaine
Life of this patent
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Abstract
A hydraulic-cement setting retarder included in concrete, mortars, or grouts to control setting time as a function of the retarder dosage. Specifically, the retarder is a cyclic amino resin of formula (I): ##STR1## where (a) R1 is a hydrogen atom, a hydroxymethal radial or a group of formula (II) CH.sub.2 --O--R (II) (b) R.sub.2 is a group of formula (II), (c) R is a linear or branched C1-C4 alkyl radical, or a group of formula (III) ##STR2## (d) R.sub.3 and R.sub.4 each are a hydrogen atom, and C1-C4 linear or branched alkyl radical or a group of formula (III).
Claims15
A cement composition comprising a settable hydraulic cement in combination with an effective amount to retard setting of the cement of at least one cyclic-amino resin of formula (I) ##STR5## wherein (a) R.sub.1 is a hydrogen atom, a hydroxymethyl radical, a 11-hydroxy-3,6,9-trioxa-undecanoyl oxymethyl radical or a group of the formula (II)
- CH.sub.2 --O--R (II)
- (b) R.sub.2 is a 11-hydroxyl-3,6,9-trioxa-undecanoyl oxymethyl radical or a group of formula (II), wherein
- (c) R is a linear or branched C.sub.1 -C.sub.4 alkyl radical, or a group of formula (III) ##STR6## (d) where R.sub.3 and R.sub.4 each are a hydrogen atom, a C.sub.1 -C.sub.4 linear or branched alkyl radical or a group of formula (III), and R', R" and R'" each represent a hydrogen atom, a C.sub.1 -C.sub.4 linear or branched alkyl radical, n is 0 or 1 and m is 1, 2, 3, or 4.
A method for retarding the setting of a hydraulic cement which comprises adding to said cement an effective amount of a setting retarder comprising a cyclic-amino resin of formula I:
- ##STR7## wherein (a) R.sub.1 is a hydrogen atom, a hydroxymethyl radical, a 11-hydroxy-3,6,9-trioxa-undecanoyl oxymethyl radical or a group of the formula (II)
- --CH.sub.2 --O--R (II)
- (b) R.sub.2 is a 11-hydroxyl-3,6,9-trioxa-undecanoyl oxymethyl radical or a group of formula (II), wherein
- (c) R is a linear or branched C.sub.1 -C.sub.4 alkyl radical, or a group of formula (III) ##STR8## (d) where R.sub.3 and R.sub.4 each are a hydrogen atom, a C.sub.1 -C.sub.4 linear or branched alkyl radical or a group of formula (III), and R', R" and R'" each represent a hydrogen atom, a C.sub.1 -C.sub.4 linear or branched alkyl radical, n is 0 or 1 and m is 1, 2, 3, or 4.
Dependencies are inferred from the claim text.