Rheology modifying agent

Patent metadata

Field	Value
Publication number	US-12415755-B2
Application number	US-201917289796-A
Country	US
Kind code	B2
Filing date	Oct 10, 2019
Priority date	Nov 9, 2018
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Rheology modifying agent that provides a rheology modifying effect over a wide temperature region. The rheology modifying agent contains amine oxide compounds represented by reference formulae (1a) and reference formulae (1b). Slurry. Method for producing a slurry.

First claim

The invention claimed is:

1. A rheology modifying agent comprising two or more types of compounds,
wherein the two or more types of compounds comprise a compound (1a) represented by the following general formula (1a) and a compound (1b) represented by the following general formula (1b):

wherein:
each of n1 and n2 is independently an integer of 0 or more and 3 or less;
R 11a is an alkenyl group with 14 or more and 22 or less carbons when n1 is 0 and an alkenyl group with 13 or more and 21 or less carbons when n1 is 1 to 3;
R 11b is an alkenyl group with 14 or more and 22 or less carbons when n2 is 0 and an alkenyl group with 13 or more and 21 or less carbons when n2 is 1 to 3;
provided that an alkenyl group of R 11b is an alkenyl group which is different from R 11a when n1 and n2 are the same number;
each of R 2 and R 3 is independently an alkyl group with 1 or more and 4 or less carbons or a group represented by —(C 2 H 4 O) p H; and
p is an average number of added moles of (C 2 H 4 O) and a total for R 2 and R 3 is a number of 0 or more and 5 or less, and
wherein a mass ratio of compound (1b)/compound (1a) is 5/95-40/60.

2. The rheology modifying agent according to claim 1 , wherein a mass ratio of the compound (1b) to the compound (1a) is 25/75 or more and 40/60 or less.

3. The rheology modifying agent according to claim 1 , wherein the compound (1a) is oleyl dimethyl amine oxide.

4. The rheology modifying agent according to claim 1 , wherein the two or more types of compounds comprise a compound (11a) represented by the following general formula (11a) and said compound (1b) represented by the following general formula (1b):

wherein:
R 11a is an alkenyl group with 14 or more and 22 or less carbons; and
each of R 2 and R 3 is independently an alkyl group with 1 or more and 4 or less carbons or a group represented by —(C 2 H 4 O) p H; and
p is an average number of added moles of (C 2 H 4 O) and a total for R 2 and R 3 is a number of 0 or more and 5 or less.

5. The rheology modifying agent according to claim 4 , wherein the compound (1b) is a compound in which n2 is 1 to 3 and R 11b is an alkenyl group with 13 or more and 21 or less carbons.

6. The rheology modifying agent according to claim 5 , wherein a mass ratio of the compound (1b) to the compound (11a) is 25/75 or more and 40/60 or less.

7. The rheology modifying agent according to claim 4 , wherein the compound (1b) is oleic acid amido propyl dimethyl amine oxide.

8. The rheology modifying agent according to claim 4 , wherein the compound (11a) is oleyl dimethyl amine oxide.

9. The rheology modifying agent according to claim 1 , further comprising an anionic aromatic compound.

10. A slurry, comprising:
the rheology modifying agent according to claim 1 ;
water; and
a powder.

11. The slurry according to claim 10 , wherein the powder comprises a hydraulic powder.

12. A method for producing a slurry composition, the method comprising:
mixing the rheology modifying agent according to claim 1 , water, and a powder.

13. The method for producing a slurry composition according to claim 12 ,
wherein the method comprises, in the following order:
mixing water and a powder, to obtain an initial slurry;
adding and mixing the compound (1a) to the initial slurry, to obtain an intermediate slurry; and then
adding and mixing the compound (1b) to the intermediate slurry, to obtain the slurry composition.

14. The method according to claim 13 , further comprising, after adding the compound (1b):
adding an anionic aromatic compound.

15. The method according to claim 12 , wherein the powder comprises a hydraulic powder.

16. The rheology modifying agent according to claim 7 , wherein the compound (11a) is oleyl dimethyl amine oxide.

Assignees

• Kao Corp

Inventors

• Okada Kohei

Classifications

• C04B2103/0079

  Rheology influencing agents · CPC title

• C04B40/0046

  characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures · CPC title

• C04B28/04

  Portland cements · CPC title

• C04B24/124

  Amides · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title