IP Library › Granted Patent US 12,441,884
Granted Patent B2
US 12,441,884 · App. 17/427,281 · Granted Oct 14, 2025

Rheology control agent and curable composition using the same

Inventors: Kyohei Nakano (Saitama, JP); Hiroki Ouchi (Saitama, JP); Kenji Fukui (Saitama, JP)
Assignee: KUSUMOTO CHEMICALS, LTD.
C08L83/04C08J3/226C08K5/20C09J11/06C09J11/08C09J183/04C09K3/1018C08J2377/08C08J2491/00C08L2310/00C09K2200/047C09K2200/0667C09K2200/0685
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Quick Facts
Patent No.
US 12,441,884
App. No.
17/427,281
Granted
Oct 14, 2025
Kind
B2
Abstract

A rheology control agent for a curable composition includes: a diamide compound (A) and/or a hydrogenated castor oil (A′), the diamide compound (A) being obtained by condensation reaction between a diamine component (A1) and a monocarboxylic acid component (A2); and a polyamide compound (B) obtained by polycondensation of an amine component (B1) and a carboxylic acid component (B2). The amine component (B1) contains at least one amine selected from the group consisting of a diamine and a triamine having 2 to 54 carbon atoms. The carboxylic acid component (B2) contains at least one carboxylic acid selected from the group consisting of a dicarboxylic acid and a tricarboxylic acid having 4 to 54 carbon atoms. The polyamide compound (B) is obtained by polycondensation of at least one of the amine component (B1) and the carboxylic acid component (B2) containing polymerized fatty acids.

Claims (23)

1. A rheology control agent for a curable composition, the rheology control agent comprising:

a diamide compound (A), the diamide compound (A) being obtained by condensation reaction between a diamine component (A1) and a monocarboxylic acid component (A2); and

a polyamide compound (B) obtained by polycondensation of an amine component (B1) and a carboxylic acid component (B2), wherein

the amine component (B1) contains at least one amine selected from the group consisting of a diamine with 2 to 54 carbon atoms and a triamine with 2 to 54 carbon atoms,

the carboxylic acid component (B2) contains at least one carboxylic acid selected from the group consisting of a dicarboxylic acid with 4 to 54 carbon atoms and a tricarboxylic acid with 4 to 54 carbon atoms,

the polyamide compound (B) is a polyamide obtained by polycondensation of at least one of the amine component (B1) containing polymerized fatty acid derivatives and the carboxylic acid component (B2) containing polymerized fatty acids,

a content of the polyamide compound (B) is 1 wt % to 30 wt % with respect to a total amount of the polyamide compound (B) and the diamide compound (A), and the rheology control agent is in a form of a powdered solid, and

the polyamide compound (B) has a weight-average molecular weight of 2,000 to 50,000.

2. The rheology control agent according to claim 1 , wherein the amine component (B1) contains a diamine or a triamine with 2 to 12 carbon atoms.

3. The rheology control agent according to claim 1 , wherein the carboxylic acid component (B2) contains at least polymerized fatty acids.

4. The rheology control agent according to claim 1 , wherein a reaction molar ratio (B1/B2) between the amine component (B1) and the carboxylic acid component (B2) is less than 1.

5. The rheology control agent according to claim 1 , wherein a cured product of the curable composition is used as a sealant or an adhesive.

6. A curable composition comprising:

a binder; and

a rheology control agent, the rheology control agent comprising:

a diamide compound (A), the diamide compound (A) being obtained by condensation reaction between a diamine component (Al) and a monocarboxylic acid component (A2); and

a polyamide compound (B) obtained by polycondensation of an amine component (B1) and a carboxylic acid component (B2), wherein

the amine component (B1) contains at least one amine selected from the group consisting of a diamine with 2 to 54 carbon atoms and a triamine with 2 to 54 carbon atoms,

the carboxylic acid component (B2) contains at least one carboxylic acid selected from the group consisting of a dicarboxylic acid with 4 to 54 carbon atoms and a tricarboxylic acid with 4 to 54 carbon atoms,

the polyamide compound (B) is a polyamide obtained by polycondensation of at least one of the amine component (B1) containing polymerized fatty acid derivatives and the carboxylic acid component (B2) containing polymerized fatty acids,

a content of the polyamide compound (B) is 1 wt % to 30 wt % with respect to a total amount of the polyamide compound (B) and the diamide compound (A), and the rheology control agent is in a form of a powdered solid, and

the polyamide compound (B) has a weight-average molecular weight of 2,000 to 50,000.

7. The curable composition according to claim 6 , further comprising a filler.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 30, 2021
From: NAKANO, KYOHEI; OUCHI, HIROKI; FUKUI, KENJI
To: KUSUMOTO CHEMICALS, LTD.
Reel/Frame 057038/0248 →
Priority Claims (1)
JP 2019-016546 · Jan 31, 2019 · national
Continuity (1)
Related Publication 20220135798A1 · May 5, 2022
References Cited (24)
US 4128436A · O'Hara · 1978 [cited by examiner]
US 4778843A · Cooperman · 1988 [cited by examiner]
US 4927739A · Taniguchi et al. · 1990 [cited by applicant]
US 5180802A · Hartman et al. · 1993 [cited by applicant]
US 8809429B2 · Azeyanagi · 2014 [cited by examiner]
US 20050176880A1 · Fujii · 2005 [cited by examiner]
US 20170022402A1 · Lutz et al. · 2017 [cited by applicant]
CN 101463244A · 2009 [cited by applicant]
EP 0809556B1 · 1998 [cited by applicant]
JP S51002750A · 1976 [cited by applicant]
JP 56112977A · 1981 [cited by applicant]
JP 4236225A · 1992 [cited by applicant]
JP 4301643A · 1992 [cited by applicant]
JP 2005220286A · 2005 [cited by applicant]
JP 2014227427A · 2014 [cited by applicant]
JP 2017518391A · 2017 [cited by applicant]
KR 100990964B1 · 2010 [cited by applicant]
Office Action issued on Jan. 17, 2023, in corresponding Japanese patent Application No. 2020-569444, 4 pages. [cited by applicant]
Office Action issued on Jan. 3, 2023, in corresponding Chinese patent Application No. 201980084567.2, 12 pages. [cited by applicant]
Office Action issued on Jan. 10, 2022, in corresponding Taiwanese patent Application No. 108147130, 16 pages. [cited by applicant]
Odian G.: “Principles of Polymerization, Fourth Edition” In: “Principles of Polymerization”, Jan. 1, 2004 (Jan. 1, 2004), John Wiley & Sons, Inc, XP055957137, ISBN: 978-0-471-27400-1, 6 pp. [cited by applicant]
Extended European Search Report issued Sep. 14, 2022, in corresponding European Patent Application 19912858.8, 14pp. [cited by applicant]
Taiwanese Office Action issued Sep. 27, 2022, in corresponding Taiwanese Patent Application 108147130, including English translation, 16pp. [cited by applicant]
International Search Report and Written Opinion mailed on Mar. 31, 2020, received for PCT Application PCT/JP2019/050436, Filed on Dec. 23, 2019, 12 pages including English Translation. [cited by applicant]