Amphoteric polymer and process for producing the same
AssigneeNippon Shokubai Co., Ltd.
InventorsAtsuro Yoneda, Daisuke Michitaka
Life of this patent
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Abstract
The present invention has an object to provide an amphoteric polymer having high anti-soil redeposition ability and solubility with surfactants, and a process for producing the same. The amphoteric polymer includes: a structure unit (a) derived from a cationic group-containing monomer (A); and a structure unit (b) derived from a carboxyl group-containing monomer (B). The structure unit (a) is present at a level of 1 to 99% by mass based on 100% by mass of all structure units derived from all monomers in the amphoteric polymer, and the structure unit (b) is present at a level of 1 to 99% by mass based on 100% by mass of all the structure units derived from all the monomers in the amphoteric polymer.
Claims12
An amphoteric polymer comprising:
- a structure unit (a) derived from a cationic group-containing monomer (A);
- and
- a structure unit (b) derived from a carboxyl group-containing monomer (B),
- the cationic group-containing monomer (A) represented by the formula (1) or (1′):
- wherein R0 represents CH3;
- R1 represents CH2CH2;
- R2, R3, and R4 each represent a C1-20 organic group, and each of R2, R3, and R4 may be the same as or different from each other;
- R5 and R6 each represent H or a C1-20 organic group and may be the same as or different from each other;
- Y1 represents a C2-20 alkylene group, and each of Y1s may be the same as or different from each other;
- n represents an average addition number of moles of oxyalkylene groups (—Y1—O—) and is from 1 to 300;
- and X− represents a counteranion,
- wherein, the structure unit (a) is present at a level of 1 to 99% by mass based on 100% by mass of all structure units derived from all monomers in the amphoteric polymer, and
- the structure unit (b) is present at a level of 1 to 99% by mass based on 100% by mass of all the structure units derived from all the monomers in the amphoteric polymer.
A process for producing an amphoteric polymer, comprising polymerizing a cationic group-containing monomer (A) and a carboxyl group-containing monomer (B),
- the cationic group-containing monomer represented by the formula (1) or (1′):
- wherein R0 represents CH3;
- R1 represents CH2CH2;
- R2, R3, and R4 each represent a C1-20 organic group, and each of R2, R3, and R4 may be the same as or different from each other;
- R5 and R6 each represent H or a C1-20 organic group and may be the same as or different from each other;
- Y1 represents a C2-20 alkylene group, and each of Y1s may be the same as or different from each other;
- n represents an average addition number of moles of oxyalkylene groups (—Y1—O—) and is from 1 to 300;
- and X− represents a counteranion, and
- wherein the cationic group-containing monomer (A) is added at a level of from 1 to 99% by mass based on 100% by mass of all monomers to be added, and
- the carboxyl group-containing monomer (B) is added at a level of from 1 to 99% by mass based on 100% by mass of all the monomers to be added.
Dependencies are inferred from the claim text.