Technical · PVA 1788
Published 2026 · Ningxia Dadi PVA technical desk
Buying Dadi PVA 088-20 PVAc emulsion is less about the label and more about the hydrolysis and viscosity window behind it. After years of feeding this exact spec to compounders, here is the practical picture.
Dadi PVA 088-20 is a 88 mol% hydrolysis grade used for PVAc emulsion . 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 | 088-20 |
| Product | Polyvinyl Alcohol (PVA) |
| Degree of hydrolysis | 88 mol% |
| Avg. polymerization (DP) | by viscosity band (export code) |
| Viscosity (4% aq., 20C) | 20.5-24.5 mPa.s |
| Solubility | partially hydrolyzed |
| China-market code | 1788 |
| CAS / HS code | 9002-89-5 / 39053000 |
| Appearance | white flake, granule or powder |
| Purity | ≥93.0% (grade dependent) |
| pH (4% sol.) | 5-7 |
From the floor
A Southeast-Asian white-glue customer locked our 88-series into the standard formula three years running. Our Ningxia Dadi QC keeps each lot sampled to expiry, so any issue is traceable.
How it compares
Against 88-series, the 88% 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.
Why 088-20 works for PVAc emulsion
In PVAc systems, 088-20's 88% hydrolysis gives stability and the 20.5-24.5 band sets final viscosity — adhesive makers we serve treat this as a standard formula.
One tip we always give
Don't store below 5C or it breaks; add a little biocide against mould.
How to run it on your line
Seed with 4–6% PVA solution, drop VAc monomer, hold pH 4–6 for storage.
FAQ
Standard PVA for PVAc adhesive?
Medium-viscosity 88-series (the 1788 / 088-20 band) is the industry default.
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
Spec sheets only go so far — the real test is your line. We keep 500 g free samples and full EN TDS/MSDS/COA ready.
