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STEPAN® MWA-263

STEPAN® MWA-263 is a nonionic reverse eo/po block copolymer that exhibits fast-breaking, low foaming, and defoaming properties that can be used in lubricants in synthetic and semi-synthetic metalworking fluids. It can be used as a component of lubricants, gear and chain oils, metalworking fluids, hydraulic fluids, and plasticizers.

Brand: STEPAN (48 products)

Chemical Name: Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)

End Uses: Metal Working Fluids, Metalworking Fluids

Functions: Surfactant (Nonionic)

Chemical Family: Polyethylene Glycols, Polyglycols, Polyols

Molecular Weight: 2650.0 - 2650.0 g/mol

Hydroxyl Value: 43.0 - 43.0 mg KOH/g

Features: Excellent Emulsifiability, Excellent Lubricity, Low Foaming

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Base Chemicals Features
Fluids & Lubricants Features
Biodegradability

Publicly available data shows this type of chemistry to be inherently biodegradable.

Product Benefits
  • 100% active
  • Standard emulsifier chemistries
  • Hard water tolerant
  • Metal cleaning components, low foaming and coupling agent capabilities

 

Functional Characteristics.

 

STEPAN® MWA Products Product Class Sub-Class Functional Characteristics
Emulsification Lubricity Antifoaming Metal Cleaning Hard Water Tolerance Antimisting Corrosion Inhibition Coupling Agent Biocidal Inert
200 Series Alkoxylates Castor Oil X X              
Alcohol X X X X X     X  
Nonyl Phenol X X     X        
EO/PO Polymers X X              

Applications & Uses

Properties

Physical Form
Appearance
Clear liquid (at 25°C)
Typical Properties
ValueUnitsTest Method / Conditions
Actives Content100%-
Average Molecular Weight2650g/mol-
Blender Foam Height (at 25°C, in 0.1% aqueous, 5 minutes)2mm-
Blender Foam Height (at 25°C, in 0.1% aqueous, Initial)33mm-
Cloud Point (in 1% aqueous solution)46°C-
Cloud Point (in 10% aqueous solution)31°C-
Colormax. 80-Apha Scale
Density (at 25°C)1.05g/ml-
Density (at 38°C)1.04g/ml-
Draves Wetting (at 25°C , in 1.0% / 0.1% aqueous)min. (90 / 90)sec-
Flash Pointmin. 94°CPMCC Flash Point Tester
HLB12--
Hydroxyl Value43mg KOH/g-
Interfacial Tension with Light Mineral Oil (in 0.1% aqueous) 17.5dynes/cm-
pH (in 2.5% aqueous)6.5--
Pour Point10°C-
Regulated Volatile Organic Chemicals0%U.S. EPA
Ross-Miles Foam Height (at 25°C, in 0.1% aqueous, 5 minutes)0mm-
Ross-Miles Foam Height (at 25°C, in 0.1% aqueous, Initial)2mm-
Ross-Miles Foam Height (at 50°C, in 0.1% aqueous, 5 minutes)0mm-
Ross-Miles Foam Height (at 50°C, in 0.1% aqueous, Initial)0mm-
Solubility in Water (at 25°C)min. 10wt%-
Surface Tension (in 0.1% aqueous)45.2dynes/cm-
Viscosity (at 25°C)531cPs-
Viscosity (at 38°C)255cPs-
Water Contentmax. 0.2%-

Regulatory & Compliance

Certifications & Compliance
Chemical Inventories
Clearances

The international inventories (country clearances) of STEPAN MWA-263 can be found in Section 15 of the Safety Data Sheet (SDS). It is the responsibility of the formulator to review the chemical control regulations for each country where the end-product is intended to be sold or used.

Storage & Handling

Storage & Handling
  • Normal safety precautions (i.e., gloves and safety goggles) should be employed when handling STEPAN MWA-263. Contact with eyes, nose or prolonged contact with skin should be avoided. Wash thoroughly after handling STEPAN MWA-263. See SDS for more information.
  • Non-Bulk Storage Recommendations: STEPAN MWA-263 should be stored in closed containers and kept in a cool, dry place away from incompatible materials (see Section 10 of the SDS). If material is frozen, it may be fluidized by warming with a drum heater or in a steam room. Drums should be vented prior to heating to avoid excessive pressure build up.
  • Bulk Storage Recommendations: STEPAN MWA-263 should be stored in vessels of 316 stainless steel, but carbon steel is adequate assuming effective moisture exclusion. Elevated storage temperature may be desirable to maintain ease of pumping.
  • Product temperatures over 122°F (50°C) are not recommended.