PPG (Polypropylene Glycols)
Polypropylene glycols • polyether polyols
Chemistry
HO‑(C3H6O)n‑H
Functionality
Diol (≈2) • triol on request
Water solubility
decreases with MW
Acid value
≤ 0.1 mg KOH/g
Water (KF)
≤ 0.05–0.1%
Color (APHA)
≤ 50
Representative data. Exact limits vary by molecular weight and
supplier COA/TDS. Keep dry and nitrogen‑blanketed; moisture raises
isocyanate demand in PU systems. EO‑capped variants for improved
water solubility available on request.
| Parameter | Typical | Spec |
|---|---|---|
| Average MW | ≈ 400–450 | per COA |
| OH number | ≈ 250–270 mg KOH/g | ≥ 240, ≤ 285 |
| Viscosity @25 °C | ≈ 80–150 mPa·s | report |
| Water (KF) | ≤ 0.05% | ≤ 0.10% |
| Acid value | ≤ 0.05 mg KOH/g | ≤ 0.1 mg KOH/g |
| Packaging | 200 kg drum • 1000 L IBC | as ordered |
| Applications | PU elastomers/adhesives, defoamers | — |
| Parameter | Typical | Spec |
|---|---|---|
| Average MW | ≈ 950–1100 | per COA |
| OH number | ≈ 100–120 mg KOH/g | 90–130 |
| Viscosity @25 °C | ≈ 200–400 mPa·s | report |
| Water (KF) | ≤ 0.05% | ≤ 0.10% |
| Acid value | ≤ 0.05 mg KOH/g | ≤ 0.1 mg KOH/g |
| Packaging | 200 kg drum • 1000 L IBC • bulk | as ordered |
| Applications | PU CASE, lube base, surfactant intermediate | — |
| Parameter | Typical | Spec |
|---|---|---|
| Average MW | ≈ 1800–2200 | per COA |
| OH number | ≈ 50–65 mg KOH/g | 45–70 |
| Viscosity @25 °C | ≈ 700–1200 mPa·s | report |
| Water (KF) | ≤ 0.05% | ≤ 0.10% |
| Acid value | ≤ 0.05 mg KOH/g | ≤ 0.1 mg KOH/g |
| Packaging | 1000 L IBC • bulk | as ordered |
| Applications | High‑flexibility PU, release agents | — |
| Parameter | Typical | Spec |
|---|---|---|
| Average MW | ≈ 3500–4500 | per COA |
| OH number | ≈ 24–34 mg KOH/g | 22–36 |
| Viscosity @25 °C | ≈ 3000–5000 mPa·s | report |
| Water (KF) | ≤ 0.05% | ≤ 0.10% |
| Acid value | ≤ 0.05 mg KOH/g | ≤ 0.1 mg KOH/g |
| Packaging | 1000 L IBC • bulk tanker | as ordered |
| Applications | Very soft PU systems, specialty lubricants | — |
Consider heated rooms/trace or drum band heaters to maintain pumpability for ≥ PPG‑2000 grades.
| Applications | Packaging | Storage & Handling |
|---|---|---|
|
• Polyurethane CASE
(coatings/adhesives/sealants/elastomers).
• Lubricants, release agents, hydraulic fluids, heat transfer fluids. • Defoamer/surfactant intermediate; EO‑tipped block copolymers on request. |
• 200 kg coated steel or HDPE drums • 1000 L IBC • bulk
tanker.
• Nitrogen blanketing and dry air recommended during storage/transfer. |
• Store 10–35 °C, dry; protect from moisture and air
ingress.
• Materials: SS 304/316, carbon steel (dry), PTFE, EPDM. Avoid copper/strong oxidants. • Drying prior to PU use: target ≤ 0.03% water (300 ppm) or per system. |
Specs are representative; shipped material conforms to the COA for
the lot. Regulatory and labeling vary by origin and market—confirm
prior to order.