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US 11,427,509 B2Granted
Cement additive composition comprising polycarboxylic acid-based copolymer
AssigneeLG Chem, Ltd.
InventorsChang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
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Abstract
The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the present disclosure is used for cement formulation, it may improve fluidity of the composition even in a high water reducing ratio range of the particle and effectively prevent slump loss of the cement formulation, while improving initial dispersibility due to excellent water reducing performance.
Claims6
A cement additive composition comprising a polycarboxylic acid-based copolymer,
- wherein the polycarboxylic acid-based copolymer comprises an alkoxypolyalkylene glycol (meth)acrylic acid ester-based repeating unit, a polyalkylene glycol ether-based repeating unit, and a (meth)acrylic acid-based repeating unit, and is cross-linked by an ethylene glycol di(meth)acrylate-based cross-linking agent,
- wherein in the polycarboxylic acid-based copolymer, the polyalkylene glycol ether-based repeating unit is included in an amount of 50 to 150 parts by weight, the (meth)acrylic acid-based repeating unit is included in an amount of 20 to 40 parts by weight, and the ethylene glycol di(meth)acrylate-based cross-linking agent is included in an amount of 0.05 to 0.3 parts by weight, respectively, based on 100 parts by weight of the alkoxypolyalkylene glycol (meth)acrylic acid ester-based repeating unit,
- wherein the alkoxypolyalkylene glycol (meth)acrylic acid ester-based repeating unit is derived from a monomer represented by the following Chemical Formula 1:
- wherein, in Chemical Formula 1,
- R1 is a C1 alkyl,
- R11 to R14 are the same and each is a C1 to C4 alkylene,
- m1 to m4 are the same as or different from each other, and each is independently an integer of 0 to 100, and m1+m2+m3+m4 is 50 to 100, and
- R15 is hydrogen or a C1 to C4 alkyl,
- wherein the polyalkylene glycol ether-based repeating unit is derived from a monomer represented by the following Chemical Formula 2:
- wherein, in Chemical Formula 2,
- R2 is a C1 alkyl,
- R21 to R24 are the same and each is a C1 to C4 alkylene,
- n1 to n4 are the same as or different from each other, and each is independently an integer of 0 to 100, and n1+n2+n3+n4 is 50 to 100, and R25 is a C1 to C4 alkyl.
10 more elements
Dependencies are inferred from the claim text.