Hydroxy alkyl cellulose soil release agent with a cationic group and a C4—C12 hydrophobic group

Patent metadata

Field	Value
Publication number	US-11655435-B2
Application number	US-201816769424-A
Country	US
Kind code	B2
Filing date	Dec 5, 2018
Priority date	Dec 6, 2017
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

The present invention relates to a soil release agent capable of enhancing cleaning properties for removing a soil during cleaning through treatment of an object, and a soil release composition containing the soil release agent. The soil release agent is a soil release agent including a modified hydroxyalkyl cellulose in which a hydroxyalkyl cellulose is bound to at least one selected from a cationic group and a hydrophobic group including a hydrocarbon group having 4 or more carbon atoms.

First claim

The invention claimed is:

1. A soil release agent comprising a modified hydroxyalkyl cellulose in which a hydroxyalkyl cellulose is bound to a cationic group and a hydrophobic group,
wherein a degree of substitution of an anionic group in the modified hydroxyalkyl cellulose is 0.4 or less, and
wherein the hydrophobic group includes a hydrocarbon group having 4 to 12 carbon atoms and the hydrophobic group is represented by formula (1):
*—Z—R 1   (1)

wherein:
Z represents a single bond or a hydrocarbon group having at least one selected from an oxygen atom and a nitrogen atom;
R 1 represents a hydrocarbon group having 4 to 12 carbon atoms; and
* represents a binding position to a group resulting from eliminating a hydrogen atom from a hydroxy group of a hydroxyalkyl cellulose.

2. The soil release agent according to claim 1 , wherein the hydrophobic group represented by the formula (1) includes at least one selected from a hydrophobic group represented by the following formula (1-1-1), a hydrophobic group represented by the following formula (1-1-2), a hydrophobic group represented by the following formula (1-2-1), a hydrophobic group represented by the following formula (1-2-2), a hydrophobic group represented by the following formula (1-3), and a hydrophobic group represented by the following formula (1-4):

wherein:
R 11 and R 12 each independently represent an alkylene group having 2 to 4 carbon atoms;
R 1 is synonymous with R 1 in the formula (1);
* represents a binding position to a group resulting from eliminating a hydrogen atom from a hydroxy group of the hydroxyalkyl cellulose;
n1 represents an addition molar number of —R 11 —O—;
n2 represents an addition molar number of —R 12 —O—; and
n1 and n2 are each 0 or more and 30 or less.

3. The soil release agent according to claim 1 , wherein the cationic group includes a quaternary ammonium cation.

4. The soil release agent according to claim 1 , wherein the cationic group is represented by the formula (2-1) or formula (2-2):

wherein,
R 21 to R 23 each independently represent a hydrocarbon group having 1 or more and 3 or less carbon atoms;
X 1a − represents an anion;
t represents an integer of 0 or more and 3 or less; and
* represents a binding position to a group resulting from eliminating a hydrogen atom from a hydroxy group of the hydroxyalkyl cellulose.

5. The soil release agent according to claim 1 , wherein the modified hydroxyalkyl cellulose has a group represented by the following formula (3-1) or (3-2):

wherein,
R 31 to R 33 each independently represent a hydrocarbon group having 1 or more and 24 or less carbon atoms;
at least one of R 31 to R 33 represents a hydrocarbon group having 4 or more carbon atoms;
X 1a − represents an anion;
s represents an integer of 0 or more and 3 or less; and
* represents a binding position to a group resulting from eliminating a hydrogen atom from a hydroxy group of the hydroxyalkyl cellulose.

6. The soil release agent according to claim 1 , wherein a weight average molecular weight of the hydroxyalkyl cellulose is 1,000 or more and 3,000,000 or less.

7. The soil release agent according to claim 1 , wherein a degree of substitution of the hydrophobic group including a hydrocarbon group having 4 to 12 carbon atoms in the modified hydroxyalkyl cellulose is 0.0001 or more and 1 or less.

8. The soil release agent according to claim 1 , wherein a degree of substitution of the cationic group in the modified hydroxyalkyl cellulose is 0.001 or more and 1 or less.

9. A soil release composition comprising the soil release agent according to claim 1 .

10. The soil release agent according claim 1 , wherein the carbon number of the hydrocarbon group which the hydrophobic group includes is 6 or more and 12 or less.

11. The soil release agent according to claim 1 , wherein a ratio (MS R /MS C ) of the degree of substitution (MS R ) of the hydrophobic group to the degree of substitution (MS C ) of the cationic group in the modified hydroxyalkyl cellulose is 0.001 or more and 10 or less.

12. A composition, comprising:
the soil release agent according to claim 1 .

13. A cleaning agent, comprising:
the soil release agent composition according to claim 9 .

14. A process, comprising:
treating an object with the soil release agent according to claim 1 .

15. A process, comprising:
treating an object with the soil release composition according to claim 9 .

Assignees

• Kao Corp

Inventors

• Saito Takanori
• Imori Yoichiro
• Koyama Akihiro
• Yamawaki Yukiko

Classifications

• C08B11/14 Primary

  with nitrogen-containing groups · CPC title

• C11D3/225

  etherified, e.g. CMC · CPC title

• C09D101/288

  substituted with nitrogen containing radicals · CPC title

• C09D101/08

  Cellulose derivatives · CPC title

• C11D3/227 Primary

  with nitrogen-containing groups · CPC title