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US 2023/0055804 A1Published application
Powdered dispersant for hydraulic compositions and production method thereof
AssigneeKao Corporation
InventorsYoshiaki SASHIHARA, Kohei SHIMADA
Life of this patent
Estimating the term…
Abstract
The present invention is a powdered dispersant for hydraulic compositions containing a copolymer obtained by polymerizing raw material monomers containing a predetermined monomer 1 containing AO group with a number of added moles n falling within a predetermined range and a predetermined monomer 2 having a predetermined group such as a carboxylic acid group or the like, wherein a ratio of monomer 2 in the raw material monomers is 22 mass % or more, and a product of a value of n of monomer 1 and a value of mass % of the ratio is 420 or more and 2600 or less.
Claims14
A powdered dispersant for hydraulic compositions, the powdered dispersant comprising:
- a copolymer obtained by polymerizing raw material monomers comprising a monomer 1 represented by formula (1) and at least one monomer 2 selected from the group consisting of a monomer represented by formula (2a), a monomer represented by formula (2b), a monomer represented by formula (2c), and a monomer represented by formula (2d), wherein
- a ratio of the monomer 2 in the raw material monomers is 22 mass % or more, and
- a product of a value of n of the monomer 1 and a value of mass % of the ratio is 420 or more and 2600 or less,
- wherein R1 and R3 are the same or different and individually represent a hydrogen atom or a methyl group;
- R2 represents an alkyl group with 1 or more and 3 or less carbons;
- R4 represents a hydrogen atom or a methyl group;
- q is a number of 0 or more and 2 or less;
- p is 0 or 1;
- and n is a number of 5 or more and 30 or less,
- wherein R6, R7 and R8 are the same or different and individually represent a hydrogen atom or a methyl group;
- and M1 represents a hydrogen atom, an alkali metal or an alkaline-earth metal (½ atom),
- wherein R9 represents a hydrocarbon group with 1 or more and 4 or less carbons, optionally containing a hetero atom,
- wherein R10 represents a hydrogen atom or a methyl group;
- R10 represents an alkylene group with 2 or more and 12 or less carbons;
- ml is a number of 1 or more and 30 or less;
- and M2 and M3 are the same or different and individually represent a hydrogen atom, an alkali metal or an alkaline-earth metal (½ atom), and
- wherein R12 and R14 are the same or different and individually represent a hydrogen atom or a methyl group;
- R14 and R15 are the same or different and individually represent an alkylene group with 2 or more and 12 or less carbons;
- m2 and m3 are the same or different and individually represent a number of 1 or more and 30 or less;
- and M4 represents a hydrogen atom, an alkali metal or an alkaline-earth metal (½ atom).
17 more elements
A method for producing a powdered dispersant for hydraulic compositions, the method comprising:
- preparing a copolymer by polymerizing raw material monomers comprising a monomer 1 represented by formula (1) and at least one monomer 2 selected from the group consisting of a monomer represented by formula (2a), a monomer represented by formula (2b), a monomer represented by formula (2c), and a monomer represented by formula (2d) in a reaction medium containing water, thereby obtaining a reaction product containing water and the copolymer, wherein the monomer 2 is used such that a ratio of the monomer 2 in the raw material monomers is 22 mass % or more, and the monomer 1 and the monomer 2 are used such that a product of a value of n of the monomer 1 and a value of mass % of the ratio is 420 or more and 2600 or less, and
- drying the reaction product to obtain a powder containing the copolymer,
- wherein R1 and R3 are the same or different and individually represent a hydrogen atom or a methyl group;
- R2 represents an alkyl group with 1 or more and 3 or less carbons;
- R4 represents a hydrogen atom or a methyl group;
- q is a number of 0 or more and 2 or less;
- p is 0 or 1;
- and n is a number of 5 or more and 30 or less,
- wherein R6, R7 and R8 are the same or different and individually represent a hydrogen atom or a methyl group;
- and M1 represents a hydrogen atom, an alkali metal or an alkaline-earth metal (½ atom),
- wherein R9 represents a hydrocarbon group with 1 or more and 4 or less carbons, optionally containing a hetero atom,
- wherein R10 represents a hydrogen atom or a methyl group;
- R11 represents an alkylene group with 2 or more and 12 or less carbons;
- ml is a number of 1 or more and 30 or less;
- and M2 and M3 are the same or different and individually represent a hydrogen atom, an alkali metal or an alkaline-earth metal (½ atom), and
- wherein R12 and R14 are the same or different and individually represent a hydrogen atom or a methyl group;
- R13 and R15 are the same or different and individually represent an alkylene group with 2 or more and 12 or less carbons;
- m2 and m3 are the same or different and individually represent a number of 1 or more and 30 or less;
- and M4 represents a hydrogen atom, an alkali metal or an alkaline-earth metal (½ atom).
16 more elements
Dependencies are inferred from the claim text.