Aqueous hard surface cleaners based on monounsaturated fatty amides

• US 9,777,248 B2
• Filed: 09/05/2013
• Issued: 10/03/2017
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Stepan Company
• Original Assignee: Stepan Company
• Inventors: Masters, Ronald A., Gorman, Wilma
• Primary Examiner(s): Delcotto, Gregory R
• Application Number:
  US14/426,362
• Publication Number:
  US 20150225674A1
• Time in Patent Office: 1,489 Days
• Field of Search: 510235, 510238, 510245, 510254, 510264, 510421, 510422, 510424, 510426, 510427, 510433, 510434, 510477, 510488, 510501
• CPC Class Codes: C11D 1/02 Anionic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/29 Sulfates of polyoxyalkylene ethers
• CPC Class Codes: C11D 1/521 Carboxylic amides (R1-CO-NR2R3), where R1, R2 and R3 are alkyl or alkenyl groups
• CPC Class Codes: C11D 1/65 Mixtures of anionic with cationic compounds
• CPC Class Codes: C11D 1/66 Non-ionic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/72 Ethers of polyoxyalkylene glycols
• CPC Class Codes: C11D 1/83 Mixtures of non-ionic with anionic compounds
• CPC Class Codes: C11D 1/835 Mixtures of non-ionic with cationic compounds
• CPC Class Codes: C11D 1/94 Mixtures with anionic, cationic or non-ionic compounds
• CPC Class Codes: C11D 3/2082 Polycarboxylic acids-salts thereof
• CPC Class Codes: C11D 3/2086 Hydroxy carboxylic acids-salts thereof
• CPC Class Codes: C11D 3/32 Amides; Substituted amides

Abstract

Aqueous hard surface cleaners and concentrates are disclosed. In one aspect, the cleaners comprise water, a monounsaturated C₈-C₁₄ fatty N,N-dialkylamide, and at least one anionic, cationic, nonionic, or amphoteric surfactant. The cleaners have a pH within the range of 6.0 to 9.0. Dilutable hard surface cleaner concentrates comprising the monounsaturated N,N-dialkylamide and a surfactant are also disclosed. Also included are aqueous hard surface cleaners which comprise a monounsaturated N,N-dialkylamide, and which by measure of ASTM D4488-95 A5 soil, provide superior percent cleaning at a pH less than 10 than they do at pH 10 and higher. Surprisingly, when a monounsaturated C₈-C₁₄ fatty N,N-dialkylamide is included in the aqueous hard surface cleaner or concentrate, rapid and thorough cleaning performance can be achieved even at relatively neutral pH. Consequently, the hard surface cleaners are effective on greasy soils, including baked-on soils, despite their low alkalinity.

Claims

1. An aqueous hard surface cleaner consisting of:

(a) from 75 to 99.5 wt. % of water;

(b) from 0.1 to 5 wt. % of a monounsaturated C₁₀ fatty N,N-dialkylamide having the structure;

2. The cleaner of claim 1 having a pH within the range of 7.0 to 8.0.

3. The cleaner of claim 1 wherein the anionic surfactant is an alkyl aryl sulfonate.

4. The cleaner of claim 1 wherein the nonionic surfactant is a fatty alcohol ethoxylate.

5. A dilutable hard surface cleaner concentrate consisting of:

(a) 1 to 50 wt. % of a monounsaturated C₁₀ fatty N,N-dialkylamide having the structure;

6. The concentrate of claim 5 that gives, upon dilution with water, a pH within the range of 7.0 to 8.0.

7. The concentrate of claim 5 wherein the anionic surfactant is an alkyl aryl sulfonate.

8. The concentrate of claim 5 wherein the nonionic surfactant is a fatty alcohol ethoxylate.

9. An aqueous hard surface cleaner suitable for use on baked-on soil, consisting of:

(a) from 50 to 99 wt. % of water;

(b) from 0.5 to 15 wt. % of a monounsaturated C₁₀ fatty N,N-dialkylamide having the structure;

10. The cleaner of claim 9 consisting of 75 to 95 wt. % of water, 1 to 10 wt. % of the monounsaturated C₁₀ fatty N,N-dialkylamide, and 1 to 10 wt. % of the surfactant mixture.