Technical · PVA 1599
Published 2026 · Ningxia Dadi PVA technical desk
Most Dadi PVA 098-15 emulsion stabilizer inquiries start with price and end with a viscosity range. This page is built from our export specs and floor-level experience, not a catalogue blurb.
Dadi PVA 098-15 is a 98 mol% hydrolysis grade used for emulsion stabilizer . Below we cover the real spec we hold, how customers run it, and what to watch on the line.
| Brand | Dadi (export brand: Ningxia Dadi) |
|---|---|
| Grade / Model | 098-15 |
| Product | Polyvinyl Alcohol (PVA) |
| Degree of hydrolysis | 98 mol% |
| Avg. polymerization (DP) | by viscosity band (export code) |
| Viscosity (4% aq., 20C) | 13.0-17.0 mPa.s |
| Solubility | fully hydrolyzed |
| China-market code | 1599 |
| CAS / HS code | 9002-89-5 / 39053000 |
| Appearance | white flake, granule or powder |
| Purity | ≥93.0% (grade dependent) |
| pH (4% sol.) | 5-7 |
One tip we always give
Screen the solution through 80 mesh before use or the reactor will scale.
From the floor
A PVAc emulsion plant changed protective-colloid grade; scaling dropped and batch particle size stayed in window, QC rejects near zero. Our Ningxia Dadi QC keeps each lot sampled to expiry, so any issue is traceable.
Why 098-15 works for emulsion stabilizer
098-15's surface activity and 98% hydrolysis stabilize the particles, and the 13.0-17.0 band controls body — polymerization stays clean, no wall scaling, uniform particle size.
How to run it on your line
Charge 3–6% solution as seed liquor; partially hydrolyzed grades emulsify faster with less residual odour.
How it compares
Against 88-series, the 98% hydrolysis grade resists water better but needs hot water to dissolve; against competitors, our ash and volatiles are held tight so lot-to-lot drift is small — the thing emulsion and PVB customers care about most.
FAQ
Partial or full hydrolysis for emulsion?
PVAc emulsions mostly use partially hydrolyzed 88-series — better emulsifying speed and solubility.
Packaging, MOQ & lead time
25 kg PP woven bag (inner PE); jumbo bag on request. MOQ from 1 MT for stock grades, 16 MT for full container; lead time 7-15 days ex-works Ningxia. Incoterms FOB/CFR/CIF; payment T/T or L/C.
Quality & documents (trust signals)
Every lot is tested on Shimadzu GC-2014C / Agilent AOC-20 GC and Brookfield DV2T viscometer; batch sample kept to expiry. EN TDS, MSDS, COA provided. REACH and ISO 9001 status available on request [verify against current certificate].
About the supplier
Ningxia Dadi Circulation Development Co., Ltd. (PVA branch since 2009; Phase I 50,000 t + Phase II 80,000 t; ~585 staff; ABB robotic palletizing; Shimadzu GC-2014C + Agilent AOC-20 gas chromatographs + Brookfield DV2T viscometer for QC; named a national first-batch green manufacturing demonstration enterprise in 2017; calcium-carbide to VAM to PVA circular chain.
Written by Li Wei, Senior Technical Sales Engineer, Polyvinyl Alcohol Division — Ningxia Dadi Circulation Development Co., Ltd. - 9 years placing PVA grades with textile, adhesive and construction compounders across Southeast Asia, the Middle East and South America. Replies to most inquiries within one business day.
Get a quote / sample
If your current grade fights you on dissolution or film, send us your recipe and we'll match a Dadi/Landy lot to it.
