Cationic surfactant foam stabilizing composition

US11679292B2 · kind B2 · utility

Assignees

• Dow Silicones Corporation · US
• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Nanguo Liu · Midland, US
• Zachary Wenzlick · Midland, US
• Brian Harkness · Midland, US
• Jon Hannington · Midland, US
• Scott R. Miller · Roswell, US
• Gerald Lawrence Witucki · Midland, US
• Brian Dorvel · Pearland, US

Key dates

• Filing date: Dec 22, 2020
• Grant date: Jun 20, 2023
• Expiry date: Dec 22, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/62
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A foam stabilizing composition is disclosed. The composition comprises (A) a siloxane cationic surfactant comprising a cationic moiety having the formula Z1-D1-N(Y)a(R)2−a, wherein Z1 is a siloxane moiety, D1 is a divalent linking group, R is H or an unsubstituted hydrocarbyl group having from 1 to 4 carbon atoms, subscript a is 1 or 2, and each Y has formula -D-NR13+, where D is a divalent linking group and each R1 is independently an unsubstituted hydrocarbyl group having from 1 to 4 carbon atoms. The composition also comprises (B) an organic cationic surfactant comprising a cationic moiety having the formula Z2-D2-N(Y)b(R)2−b, wherein Z2 is an unsubstituted hydrocarbyl group, D2 is a covalent bond or a divalent linking group, subscript b is 1 or 2, and R, Y, and subscript a, are defined above. An aqueous film-forming foam comprising the composition and method of using the same are also disclosed.