Introduction of MC HPMC
Product form:White to off-white powder
Hydroxypropyl Content: 9-12%
Methoxyl Content: 18-24%
Viscosity: 300-200,000 mPa.s
CAS No.: 9004-65-3
Email: sales03@eclatmat.com
Tel: +86-155 2251 6763
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MC and HPMC are close relatives. Methyl cellulose (MC) is made by methylating cellulose so the backbone carries methoxyl groups; hydroxypropyl methylcellulose (HPMC) starts from the same methylated backbone and adds hydroxypropyl groups as well. The comparison of MC vs HPMC therefore comes down to a single chemical question: what does adding hydroxypropyl substitution of 4–12% to a methyl cellulose backbone actually buy you?
The answer is a material that dissolves more readily in cold water, tolerates salts and temperature swings more gracefully, holds water even more firmly (retention of 90% or more) and gels at a higher, more controllable temperature window of 65–75°C. MC remains a useful, lower-cost member of the family; HPMC is the upgraded generalist that most formulators specify when performance matters.
Every batch of HPMC is produced to the same specification and verified in the laboratory before release. A certificate of analysis accompanies each shipment.
| Parameter | Specification |
|---|---|
| Appearance | White or off-white powder |
| Viscosity | 300–200,000 mPa·s |
| Methoxyl content | 19–30% |
| Hydroxypropyl content | 4–12% |
| Bulk density | 350–450 kg/m³ |
| pH value | 6.0–7.0 |
| Water retention rate | ≥90% |
| Gelation temperature | 65–75°C |
MC vs HPMC is not a contest with one winner; it is a specification decision. Three situations show which way the choice usually falls.
Where the formula needs a straightforward nonionic thickener with thermal gelation and the process tolerates its lower gel point, methyl cellulose is the economical choice. MC is the classic methyl cellulose ether of low-complexity mortars and process aids, and for buyers watching unit cost it remains a legitimate specification.
Paints, detergents and drilling fluids are full of electrolytes and surfactants that punish polymers with narrow tolerances. HPMC keeps working in these environments because its hydroxypropyl groups broaden compatibility, and the nonionic backbone means no charge interaction with cement or salt — the reason HPMC is the default in tile adhesives where MC is a substitute, not the reverse.
Modern tile adhesives and renders ask for long open time, firm slump resistance and full cement hydration on porous substrates. HPMC delivers the combination through water retention of 90% or more and viscosity up to 200,000 mPa·s, with a gelation window at 65–75°C that stays safely above typical ambient working heat — so the mortar never gels on the trowel on a hot site.
Every grade we supply is shipped in one dependable export format: a standard 25 kg bag with consistent net weight on every unit.
One supplier, one standard — and honest advice on the MC vs HPMC question. These are the reasons formulators keep reordering.
Every production batch is tested in our own laboratory before release — viscosity, methoxyl and hydroxypropyl content, pH, water retention rate and gelation temperature are verified against the specification sheet, and a certificate of analysis (COA) is issued for each shipment. Our chemists also help you match the right grade to your formulation and target viscosity.
Beyond the standard 25 kg bag, we offer flexible packaging customization — private-label and OEM bags printed with your brand, custom labelling for local markets, and packing formats arranged to your warehouse or project requirements. Share your specification with the order and we will confirm the details before production.
MC (methyl cellulose) carries only methoxyl groups on the cellulose backbone. HPMC (hydroxypropyl methylcellulose) carries methoxyl (19–30%) plus hydroxypropyl (4–12%) groups. The extra hydroxypropyl substitution makes HPMC dissolve more readily in cold water, hold water better (≥90% retention) and gel reversibly at a higher window of 65–75°C.
HPMC is the conventional choice for tile adhesive and dry mix mortar. It provides the water retention, open time and slump resistance that cement-based systems need, and its nonionic character keeps it stable in the alkaline cement environment. MC can be considered for cost-driven projects, but most formulators specify HPMC for performance.
Usually yes, but re-test first. Because HPMC has a higher gelation window (65–75°C) and stronger water retention, switching from MC to HPMC can extend open time and heat tolerance; it can also raise viscosity, so the dosage may need to be trimmed. A free sample test is the reliable way to confirm.
No. MC has a lower thermal gelation point, which is one reason hot-site handling can be tricky with MC mortars. HPMC gels reversibly at 65–75°C, a higher and more controllable window that keeps the material workable through normal ambient temperatures.
Yes, both are nonionic cellulose ethers, so neither carries a charge in solution. That is why both tolerate cement, electrolytes and surfactants better than anionic cellulose ethers such as CMC. The practical difference between MC and HPMC is substitution chemistry, not ionic character.
Yes. Free samples and the batch COA ship typically within 24 hours of your inquiry to sales03@eclatmat.com, so you can run the MC vs HPMC comparison in your own mortar or paint formula before committing to a production order.
Tell us your formula and whether you currently use MC or another thickener. We will advise on the right cellulose ether, confirm pricing and dispatch a free sample — typically within 24 hours.
Email sales03@eclatmat.comTIANJIN ECLAT CO.,LTD.....[ read more>>]
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E-mail: sales03@eclatmat.com
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