435503

Poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol)

average M_n ~3,300

• Synonym(s): Pluronic^® 31R1, PPG-PEG-PPG
• CAS Number: 691397-13-4
• MDL number: MFCD00082049
• UNSPSC Code: 12352112
• PubChem Substance ID: 24867240
• NACRES: NA.23

Properties

• form: viscous liquid
• mol wt: average M_n ~3,300
• composition: PEG, 10 wt. %
• refractive index: n20/D 1.454
• surface tension: 34 dyn/cm, 25 °C, 0.1 wt. % in H₂O
• viscosity: 660 cP(25 °C, Brookfield)(lit.)
• transition temp: softening point −25 °C; cloud point 25 °C (1 wt. % aqueous solution)
• density: 1.018 g/mL at 25 °C
• HLB: 2.0 - 7.0
• InChI: 1S/C3H6O.C2H4O/c1-3-2-4-3;1-2-3-1/h3H,2H2,1H3;1-2H2
• InChI key: RVGRUAULSDPKGF-UHFFFAOYSA-N

Description

General description

Surface activity of the polymer is dependent on the EO/PO ratio. PPG-PEG-PPG exhibits lower foaming, greater defoaming and reduced gelling tendencies relative to Pluronic^® surfactants. Terminal secondary hydroxyl groups of PPG-PEG-PPG have lower reactivity and acidity than the primary hydroxyl groups in Pluronic surfactants.

Application

Hard and soft surface cleaners, defoamers in coatings and water treatment. Lubricant in metal working, anti-foaming aid and extender for linear and cross-linked polyesters and polyurethanes.

PPG-PEG-PPG Pluronic^® 31R1 can be used as surface cleaners (soft and hard), defoamers in coatings, in water treatment, lubricant in metal working, anti-foaming aid and extender for linear and cross-linked polyesters and polyurethanes.

Features and Benefits

Surface activity is dependent on the EO/PO ratio. Lower foaming, greater defoaming and reduced gelling tendencies relative to Pluronic^® surfactants. Terminal secondary hydroxyl groups have lower reactivity and acidity than the primary hydroxyl groups in Pluronic^® surfactants.

Legal Information

Pluronic is a registered trademark of BASF

Safety Information

• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable