Polymer emulsification process

US4177177A · kind A · utility

Inventors

• John W. Vanderhoff · Bethlehem, US
• Mohamed S. El-Aasser · Bethlehem, US
• John Ugelstad · Trondheim, NO

Key dates

• Filing date: Jan 27, 1978
• Grant date: Dec 4, 1979
• Expiry date: Jan 27, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J3/03
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A polymer emulsification process comprising intimately dispersing a liquified water insoluble polymer phase in an aqueous liquid medium phase containing at least one nonionic, anionic or cationic oil-in-water functioning emulsifying agent, in the presence of a compound selected from the group consisting of those hydrocarbons and hydrocarbyl alcohols, ethers, alcohol esters, amines, halides and carboxylic acid esters which are inert, non-volatile, water insoluble, liquid and contain a terminal aliphatic hydrocarbyl group of at least about 8 carbon atoms, and mixtures thereof, and subjecting the resulting crude emulsion to the action of comminuting forces sufficient to enable the production of an aqueous emulsion containing polymer particles averaging less than about 0.5 .mu. in size.