公开(公告)号：US20250043187A1

公开(公告)日：2025-02-06

申请号：US18920310

申请日：2024-10-18

Applicant: Stepan Company

Inventor： James A. Faunce ,  Dennis S. Murphy ,  Ronald A. Masters ,  Lei Cui ,  Paul W. Knox

IPC: C09K23/02

Abstract: A method of mitigating the formation of 1,4-dioxane and precursors of 1,4-dioxane in alkyl ether sulfate surfactants is disclosed. The method involves adding one or more alcohol, hydrotrope or anti-oxidant additives to an aqueous solution of alkyl ether sulfate surfactant having at least two ethylene oxide groups. The alcohol, hydrotrope, or anti-oxidant is added to the alkyl ether sulfate solution in an amount effective to reduce the formation of diethylene glycol monosulfate, a precursor of 1,4-dioxane, and also reduce the formation of 1,4-dioxane.

公开(公告)号：US11939434B2

公开(公告)日：2024-03-26

申请号：US16836544

申请日：2020-03-31

Applicant: STEPAN COMPANY

Inventor： Timothy A. Boebel ,  Xue Min Dong ,  E. Carolina Rojas ,  Renee Luka ,  Gary Luebke ,  Paul W. Knox

IPC: C08J3/09 ,  A01N25/04 ,  A01N25/14 ,  A01N37/34 ,  A01N43/50 ,  A01N43/653 ,  A01N43/70 ,  C08G65/26 ,  C08L71/02 ,  C09D5/02

CPC classification number: C08J3/095 ,  A01N25/04 ,  A01N25/14 ,  A01N37/34 ,  A01N43/50 ,  A01N43/653 ,  A01N43/70 ,  C08G65/2609 ,  C08G65/2612 ,  C08G65/2624 ,  C08G65/2627 ,  C08G65/263 ,  C08G65/2636 ,  C08L71/02 ,  C09D5/022 ,  C09D5/027 ,  C08J2371/02 ,  C08J2421/02 ,  C08L2201/54

Abstract: Copolymers comprising recurring units of a phenyl glycidyl ether and alkylene oxides are disclosed. Some of the copolymers comprise a di- or polyfunctional nucleophilic initiator and recurring units of the phenyl glycidyl ether and an alkylene oxide. The di- or polyfunctional nucleophilic initiator is an alcohol, phenol, amine, thiol, thiophenol, sulfinic acid, or deprotonated species thereof. Other copolymers comprise a monofunctional nucleophilic initiator selected from thiols, thiophenols, aralkylated phenols, sulfinic acids, secondary amines, C10-C20 terpene alcohols, and deprotonated species thereof. Pigments dispersions comprising the copolymers are also disclosed. The copolymers meet the growing needs of the industry with their ease of manufacture, diverse structures, and desirable performance attributes for dispersing a wide range of organic and inorganic pigments. Agricultural applications for the copolymers are also disclosed.