Surfactants based on monounsaturated fatty alcohol derivatives

Patent metadata

Field	Value
Publication number	US-11560530-B2
Application number	US-201916374819-A
Country	US
Kind code	B2
Filing date	Apr 4, 2019
Priority date	Mar 13, 2013
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

Surfactant compositions comprising an alkoxylate, a sulfate, or ether sulfate of a C10-C12 monounsaturated alcohol are disclosed. The alkoxylate, sulfate, or ether sulfate may derive from undecylenic acid or undecylenic alcohol. Compared with their saturated analogs, the monounsaturated alkoxylates, sulfates, and ether sulfates are less irritating, making them valuable for personal care, laundry, cleaners, and other household applications. Microscopy studies show that the alkoxylates, sulfates, and ether sulfates have favorable phase behavior over a wide range of actives levels, expanding opportunities for products with greater compaction. When combined with cationic surfactants, the alkoxylates, sulfates, and ether sulfates exhibit synergy, and they have improved solubility compared with their saturated analogs. The surfactants find value for the personal care, laundry and cleaning, emulsion polymerization, agricultural products, oilfield applications, and specialty foams industries.

First claim

We claim:

1. A hard-surface cleaner comprising a surfactant composition, wherein the surfactant composition comprises water and 1 to 99 wt. % of a surfactant comprising sulfates of undecylenic alcohol, wherein the surfactant comprises:
(a) 40 to 60 wt. % of a monounsaturated C 11 primary alcohol sulfate; and
(b) 40 to 60 wt. % of a secondary hydroxyalkyl C 11 primary alcohol sulfate.

2. The hard-surface cleaner of claim 1 wherein the surfactant composition further comprises 0.1 to 20 wt. % of sulfonated products.

3. The hard-surface cleaner of claim 1 wherein the surfactant composition is made by sulfating undecylenic alcohol with sulfur trioxide in a falling-film reactor, followed by neutralization.

4. A synergistic surfactant blend comprising a cationic surfactant and a surfactant composition, wherein the surfactant composition comprises water and 1 to 99 wt. % of a surfactant comprising sulfates of undecylenic alcohol, wherein the surfactant comprises:
(a) 40 to 60 wt. % of a monounsaturated C 11 primary alcohol sulfate; and
(b) 40 to 60 wt. % of a secondary hydroxyalkyl C 11 primary alcohol sulfate.

5. The synergistic surfactant blend of claim 4 wherein the surfactant composition further comprises 0.1 to 20 wt. % of sulfonated products.

6. The synergistic surfactant blend of claim 4 wherein the surfactant composition is made by sulfating undecylenic alcohol with sulfur trioxide in a falling-film reactor, followed by neutralization.

Assignees

• Stepan Co

Inventors

• Bernhardt Randal J
• Gorman Wilma
• Masters Ronald

Classifications

• A01N25/30 Primary

  characterised by the surfactants · CPC title

• C07C305/10

  being further substituted by singly-bound oxygen atoms · CPC title

• A01N25/00

  Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application {, e.g. seed treatment or sequential application}; Substances for reducing the noxious effect of the active ingredients to organisms other than pests · CPC title

• C11D1/146 Primary

  Sulfuric acid esters · CPC title