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US 10,894,239 B2Granted
Dispersant, dispersion composition, and fibrous sheet
AssigneeMeisei Chemical Works, Ltd.
InventorsShuichi Ishigure, Harutaka Naruse
Life of this patent
Estimating the term…
Abstract
The present invention aims to provide a dispersant and a dispersion composition that exhibit high dispersing ability for nano-carbons such as, in particular, CNTs. The dispersant according to the present invention includes a polyalkylene oxide having a structural unit of the following chemical formula (1). In the chemical formula (1), L1 and L2 are each a straight-chain alkylene group that may have a substituent, Z is a linking group that links L1 and Ar, or alternatively, Z may not be present and L1 and Ar may be linked directly to each other, and Ar is represented by the following chemical formula (1a), (1b), or (1c).
Claims15
A dispersant comprising:
- a polyalkylene oxide having a weight-average molecular weight of 4,000 or more, the polyalkylene oxide having a structural unit of the following chemical formula (1):
- where in the chemical formula (1),
- L1 is a straight-chain alkylene group in which at least one hydrogen atom is substituted with Z—Ar, and L1 may or may not have a substituent other than Z—Ar,
- L2 is a straight-chain alkylene group in which at least one hydrogen atom may or may not be substituted with a substituent,
- there may be one or more Z—Ar's, and when there are a plurality of Z—Ar's, they may be the same or different from each other,
- Z is a linking group that links L1 and Ar, and the linking group may or may not contain each of an alkylene chain, an ether bond, an ester bond, and an imide bond,
- Ar is represented by the following chemical formula (1a), (1b), or (1c);
- there may be one or more Ar's for one Z;
- when there are a plurality of Ar's, they may be the same or different from each other;
- and a naphthyl group in the following chemical formula (1b) may be either a 1-naphthyl group or a 2-naphthyl group,
- R1, R2, and R3 are each a substituent;
- there may be one or more of each of R1, R2, and R3, or R1, R2, and R3 each may not be present;
- and when there are a plurality of R1s, R2s, and R3s, R1s, R2s, and R3s may be the same or different from each other, respectively,
- n and m are each an integer of 1 or more,
- a sequence of L1 and L2 is not particularly limited, and may be any of alternating, random, or block sequences, and there may be one or more types of L1s and L2s, respectively,
- wherein, in the chemical formula (1), R1, R2, and, R3 are each at least one substituent selected from the group consisting of alkyl groups, unsaturated aliphatic hydrocarbon groups, alkoxy groups, alkoxyalkyl groups, halogens, acyl groups, and haloalkyl groups.
13 more elements
A fiber sheet obtained by subjecting a dispersion composition to a wet papermaking process, the dispersion composition comprising:
- a dispersant comprising:
- a polyalkylene oxide having a weight-average molecular weight of 4,000 or more, the polyalkylene oxide having a structural unit of the following chemical formula (1):
- where in the chemical formula (1),
- L1 is a straight-chain alkylene group in which at least one hydrogen atom is substituted with Z—Ar, and L1 may or may not have a substituent other than Z—Ar,
- L2 is a straight-chain alkylene group in which at least one hydrogen atom may or may not be substituted with a substituent,
- there may be one or more Z—Ar's, and when there are a plurality of Z—Ar's, they may be the same or different from each other,
- Z is a linking group that links L1 and Ar, and the linking group may or may not contain each of an alkylene chain, an ether bond, an ester bond, and an imide bond,
- Ar is represented by the following chemical formula (1a), (1b), or (1c);
- there may be one or more Ar's for one Z;
- when there are a plurality of Ar's, they may be the same or different from each other;
- and a naphthyl group in the following chemical formula (1b) may be either a 1-naphthyl group or a 2-naphthyl group,
- R1, R2, and R3 are each a substituent;
- there may be one or more of each of R1, R2, and R3, or R1, R2, and R3 each may not be present;
- and when there are a plurality of R1s, R2s, and R3s, R1s, R2s, and R3s may be the same or different from each other, respectively,
- n and m are each an integer of 1 or more,
- a sequence of L1 and L2 is not particularly limited, and may be any of alternating, random, or block sequences, and there may be one or more types of L1s and L2s, respectively;
- at least one of inorganic fibers or organic fibers;
- and
- a dispersion medium.
16 more elements
A dispersant composition comprising:
- an aqueous dispersion media;
- a dispersoid dispersed throughout the dispersant composition, the dispersoid selected from the group consisting of a nano-carbon, metal nanoparticles, inorganic fibers, and organic fibers;
- and
- a polyalkylene oxide having a structural unit of the following chemical formula (1):
- wherein in the chemical formula (1),
- L1 is a straight-chain alkylene group in which at least one hydrogen atom is substituted with Z—Ar, and L1 may or may not have a substituent other than Z—Ar,
- L2 is a straight-chain alkylene group in which at least one hydrogen atom may or may not be substituted with a substituent,
- there may be one or more Z—Ar's, and when there are a plurality of Z—Ar's, they may be the same or different from each other,
- Z is a linking group that links L1 and Ar, or alternatively, Z may not be present and L1 and Ar may be linked directly to each other;
- and the linking group may or may not contain each of an alkylene chain, an ether bond, an ester bond, and an imide bond,
- Ar is represented by the following chemical formula (1a), (1b), or (1c);
- there may be one or more Ar's for one Z;
- when there are a plurality of Ar's, they may be the same or different from each other;
- and a naphthyl group in the following chemical formula (1b) may be either a 1-naphthyl group or a 2-naphthyl group,
- R1, R2, and R3 are each a substituent;
- there may be one or more of each of R1, R2, and R3, or R1, R2, and R3 each may not be present;
- and when there are a plurality of R1s, R2s, and R3s, R1s, R2s, and R3s may be the same or different from each other, respectively,
- n and m are each an integer of 1 or more,
- a sequence of L1 and L2 is not particularly limited, and may be any of alternating, random, or block sequences, and
- there may be one or more types of L1s and L2s, respectively, wherein
- the inorganic fibers are at least one type selected from the group consisting of carbon fibers, glass fibers, metal fibers, ceramic fibers, and basalt fibers, and
- the organic fibers are at least one selected from the group consisting of polyester fibers, cellulose fibers, aramid fibers, and polyvinylidene fluoride fibers.
19 more elements
A dispersant comprising:
- a polyalkylene oxide having a structural unit of the following chemical formula (1), wherein the dispersant is for use as at least one selected from the group consisting of a dispersant for a nano-carbon, a dispersant for metal nanoparticles, a dispersant for inorganic fibers, and a dispersant for organic fibers:
- where in the chemical formula (1),
- L1 is a straight-chain alkylene group in which at least one hydrogen atom is substituted with Z—Ar, and L1 may or may not have a substituent other than Z—Ar,
- L2 is a straight-chain alkylene group in which at least one hydrogen atom may or may not be substituted with a substituent,
- there may be one or more Z—Ar's, and when there are a plurality of Z—Ar's, they may be the same or different from each other,
- Z is a linking group that links L1 and Ar, or alternatively, Z may not be present and L1 and Ar may be linked directly to each other;
- and the linking group may or may not contain each of an alkylene chain, an ether bond, an ester bond, and an imide bond,
- Ar is represented by the following chemical formula (1a), (1b), or (1c);
- there may be one or more Ar's for one Z;
- when there are a plurality of Ar's, they may be the same or different from each other;
- and a naphthyl group in the following chemical formula (1b) may be either a 1-naphthyl group or a 2-naphthyl group,
- R1, R2, and R3 are each a substituent;
- there may be one or more of each of R1, R2, and R3, or R1, R2, and R3 each may not be present;
- and when there are a plurality of R1s, R2s, and R3s, R1s, R2s, and R3s may be the same or different from each other, respectively,
- n and m are each an integer of 1 or more,
- a sequence of L1 and L2 is not particularly limited, and may be any of alternating, random, or block sequences, and there may be one or more types of L1s and L1s, respectively,
- wherein, in the chemical formula (1), R1, R2, and, R3 are each at least one substituent selected from the group consisting of alkyl groups, unsaturated aliphatic hydrocarbon groups, alkoxy groups, alkoxyalkyl groups, halogens, acyl groups, and haloalkyl groups.
14 more elements
A fiber sheet obtained by subjecting a dispersion composition to a wet papermaking process, the dispersion composition comprising:
- a dispersant comprising:
- a polyalkylene oxide having a structural unit of the following chemical formula (1), wherein the dispersant is for use as at least one selected from the group consisting of a dispersant for a nano-carbon, a dispersant for metal nanoparticles, a dispersant for inorganic fibers, and a dispersant for organic fibers:
- where in the chemical formula (1),
- L1 is a straight-chain alkylene group in which at least one hydrogen atom is substituted with Z—Ar, and L1 may or may not have a substituent other than Z—Ar,
- L2 is a straight-chain alkylene group in which at least one hydrogen atom may or may not be substituted with a substituent,
- there may be one or more Z—Ar's, and when there are a plurality of Z—Ar's, they may be the same or different from each other,
- Z is a linking group that links L1 and Ar, or alternatively, Z may not be present and L1 and Ar may be linked directly to each other;
- and the linking group may or may not contain each of an alkylene chain, an ether bond, an ester bond, and an imide bond,
- Ar is represented by the following chemical formula (1a), (1b), or (1c);
- there may be one or more Ar's for one Z;
- when there are a plurality of Ar's, they may be the same or different from each other;
- and a naphthyl group in the following chemical formula (1b) may be either a 1-naphthyl group or a 2-naphthyl group,
- R1, R2, and R3 are each a substituent;
- there may be one or more of each of R1, R2, and R3, or R1, R2, and R3 each may not be present;
- and when there are a plurality of R1s, R2s, and R3s, R1s, R2s, and R3s may be the same or different from each other, respectively,
- n and m are each an integer of 1 or more,
- a sequence of L1 and L2 is not particularly limited, and may be any of alternating, random, or block sequences, and there may be one or more types of L1s and L2s, respectively;
- at least one of inorganic fibers or organic fibers;
- and
- a dispersion medium.
17 more elements
Dependencies are inferred from the claim text.