Solution, dispersant, method for producing vinyl compound polymer, and method for producing solution
AssigneeKuraray Co., Ltd.
InventorsYuji OKAMOTO, Michinari SEKI
Life of this patent
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Abstract
The present specification provides a solution including a vinyl alcohol polymer (A) having a degree of saponification of 30 mol % or more and 80 mol % or less and having a degree of polymerization of 100 or more and 700 or less; a compound (B); and an alcohol (C).
Claims17
A solution comprising:
- a vinyl alcohol polymer (A) having a degree of saponification of 30 mol % or more and 80 mol % or less and having a degree of polymerization of 100 or more and 700 or less;
- a compound (B);
- and
- an alcohol (C), wherein
- the compound (B) is a compound represented by the following formula (1):
- wherein, in the formula (1):
- X represents an oxygen atom, a group represented by the following formula (2), or a group represented by the following formula (3);
- Y represents a group having 1 to 10 carbon atoms;
- Z represents one selected from the group consisting of a carboxy group, a sulfo group, a phosphoric acid group, a salt thereof, and an anion thereof;
- and R1 represents an acyl group or a hydrocarbon group,
- in the formula (2) and the formula (3):
- R2, R3, and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an atomic bonding that bonds to Y;
- and * denotes an atomic bonding.
A dispersant comprising:
- a vinyl alcohol polymer (A) having a degree of saponification of 30 mol % or more and 80 mol % or less and having a degree of polymerization of 100 or more and 700 or less;
- and
- a compound (B), wherein
- the compound (B) is a compound represented by the following formula (1):
- wherein, in the formula (1):
- X represents an oxygen atom, a group represented by the following formula (2), or a group represented by the following formula (3);
- Y represents a group having 1 to 10 carbon atoms;
- Z represents one selected from the group consisting of a carboxy group, a sulfo group, a phosphoric acid group, a salt thereof, and an anion thereof;
- and R1 represents an acyl group or a hydrocarbon group,
- in the formula (2) and the formula (3):
- R2, R3, and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an atomic bonding that bonds to Y;
- and * denotes an atomic bonding.
A method for producing a solution, the method comprising:
- adding a vinyl alcohol polymer (A) having a degree of saponification of 30 mol % or more and 80 mol % or less and having a degree of polymerization of 100 or more and 700 or less, to a liquid in multiple portions, the liquid comprising a compound (B) represented by the following formula (1), and an alcohol (C),
- wherein, in the formula (1):
- X represents an oxygen atom, a group represented by the following formula (2), or a group represented by the following formula (3);
- Y represents a group having 1 to 10 carbon atoms;
- Z represents one selected from the group consisting of a carboxy group, a sulfo group, a phosphoric acid group, a salt thereof, and an anion thereof;
- and R1 represents an acyl group or a hydrocarbon group,
- in the formula (2) and the formula (3):
- R2, R3, and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an atomic bonding that bonds to Y;
- and * denotes an atomic bonding.
A dispersant which is a solution comprising a vinyl alcohol polymer (A) at a concentration of 15% by mass or more, the vinyl alcohol polymer (A) having a degree of saponification of 30 mol % or more and 80 mol % or less and having a degree of polymerization of 100 or more and 700 or less, wherein a block character of vinyl ester units is 0.6 or less.
A method for producing a vinyl compound polymer, the method comprising:
- preparing a vinyl alcohol polymer (A) having a degree of saponification of 30 mol % or more and 80 mol % or less and having a degree of polymerization of 100 or more and 700 or less, wherein a block character of vinyl ester units is 0.6 or less;
- and
- polymerizing a vinyl compound in the presence of the vinyl alcohol polymer (A) to give vinyl compound polymer particles having an average particle diameter of 220 μm or less, wherein
- in the preparing, a solution comprising the vinyl alcohol polymer (A) at a concentration of 15% by mass or more is prepared.
Dependencies are inferred from the claim text.