Polyalkylene glycol monobutyl ether

Polyalkylene glycol monobutyl ether (CAS 9038-95-3), also marketed as polyethylene-polypropylene glycol monobutyl ether, is a block or random copolymer of ethylene oxide and propylene oxide capped with a butyl group.

Where is Polyalkylene glycol monobutyl ether used?

• Cleaning: nonionic surfactant, solvent and wetting agent that improves soil release and degreasing in hard surface cleaners and degreasers
• Lubrication: lubricity modifier and emulsifier in metalworking fluids; stabilises cutting and rolling oil emulsions
• Textile processing: wetting and scouring agent for uniform dye penetration and fibre preparation
• Paper and leather processing: surface modifier that controls absorption and improves treatment uniformity
• It functions as a nonionic surfactant, solvent and wetting agent.
• Adhesion promoter in adhesives and mortars.
• Antifoaming agent in coatings; leveling agent after grafting with allyl-modified silicone oil.
• Co-solvent in pharmaceutical, agrochemical and cosmetic formulations to improve the solubility of active ingredients.
• Reaction medium or additive in polymer processing and chemical synthesis.

Formulation notes

• Compatible with other nonionic and anionic surfactants.

Typical specification

• Viscosity at 38 °C is at least 700 mm²/s.
• Hydroxyl value is 12 to 14 mgKOH/g.
• Water content is 0.5% maximum.
• Surface tension typically ranges from 16 to 23 mN/m at 25 °C.

Storage, packaging and handling

• Store in a well-closed container in a dry and well-ventilated place.

Frequently asked questions about Polyalkylene glycol monobutyl ether

How do the available grades differ?

It is manufactured in different grades to provide a range of molecular weights, viscosities, and solubility characteristics.

Where is it effective in controlling foam?

It is effective in controlling foam, particularly in industrial coatings and adhesives.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.