Synergistic surfactant blends

Patent metadata

Field	Value
Publication number	US-10513670-B2
Application number	US-201715482932-A
Country	US
Kind code	B2
Filing date	Apr 10, 2017
Priority date	Apr 24, 2012
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

Synergistic surfactant blends are disclosed. In one aspect, the blend comprises an anionic surfactant and a metathesis-based cationic surfactant comprising a quaternized derivative. The quaternized derivative is a quaternized fatty amine, quaternized fatty amidoamine, imidazoline quat, or esteramine quat made from a metathesis-derived C 10 -C 17 monounsaturated acid or its ester derivative. Also disclosed are synergistic surfactant blends comprising a cationic surfactant and a metathesis-based anionic surfactant comprising a sulfonated derivative. The sulfonated derivative is a fatty ester sulfonate, fatty acid sulfonate, sulfoestolide, fatty amide sulfonate, sulfonated fatty ester alkoxylate, imidazoline quat sulfonate, sulfonated amidoamine oxide, or sulfonated amidoamine betaine. The synergistic blends have a negative β value or a reduced interfacial tension (IFT) when compared with an expected IFT value calculated from the individual surfactant components. Blends of the invention also exhibit surprisingly favorable solubility profiles. The surfactant blends are useful for laundry detergents, dish detergents, household or industrial cleaners, personal care products, agricultural products, building materials, oil recovery compositions, emulsion polymers, and other practical applications.

First claim

We claim:

1. A surfactant blend comprising:
(a) a cationic surfactant; and
(b) an anionic surfactant,
wherein the anionic surfactant is a fatty ester sulfonate comprising a mixture of hydroxyalkanesulfonates and alkenesulfonates having a structure selected from the group consisting of:

2. The blend of claim 1 wherein the cationic surfactant is a quaternized fatty amine or a quaternized fatty amidoamine.

3. The blend of claim 1 wherein the cationic surfactant is cetrimonium chloride or a mixture of an alkyl dimethyl benzyl ammonium chloride and an alkyl dimethyl ethylbenzyl ammonium chloride.

4. The blend of claim 1 comprising from 0.2 to 5 moles of the anionic surfactant per mole of the cationic surfactant.

Assignees

• Stepan Co

Inventors

• Bernhardt Randal J
• Dong Xue Min

Classifications

• C11D1/65 Primary

  Mixtures of anionic with cationic compounds · CPC title

• A61Q5/02

  Preparations for cleaning the hair · CPC title

• A61K8/466

  containing sulfonic acid derivatives; Salts · CPC title

• C11D1/652

  Mixtures of anionic compounds with carboxylic amides or alkylol amides · CPC title

• A61K2800/596

  Mixtures of surface active compounds · CPC title