Name: Hydroxyethyl Cellulose HEC QP-100MH (Hydrophobically Modified)
Brand: Coatingsink
SKU: hydroxyethyl-cellulose-hec-qp100mh
Availability: InStock

Question 1

What does 'hydrophobically modified' mean for HEC and how does it change performance?

Accepted Answer

Hydrophobically modified HEC (HMHEC) has short hydrophobic alkyl chains grafted onto the cellulose backbone. These hydrophobes associate with latex particle surfaces and other hydrophobic domains in the coating, creating an associative thickening mechanism similar to HEUR. Compared to standard HEC, HMHEC delivers improved leveling and lower spatter because the associative network breaks cleanly at high shear (roller application) and rebuilds quickly. It also enhances open time in latex paints and improves water resistance of the dried film slightly, since the hydrophobic substituents reduce the film's water sensitivity.

Question 2

How should HEC QP-100MH be dissolved — dry-add or pre-slurry?

Accepted Answer

Two methods are used: (1) Dry-add at room temperature — slowly add HEC powder to the water under agitation (not vortex), then continue mixing 30–60 min until fully hydrated. A wetting agent (e.g., 0.1% Triton X-100) can be pre-added to prevent lumping. (2) Pre-slurry in propylene glycol — disperse HEC in PG at 1:3 ratio, then add the slurry to water under stirring. The pre-slurry method dissolves faster and prevents fish-eye lumps, and is the preferred approach in production. Dissolution in hot water (>50°C) is not recommended as it may cause partial precipitation before swelling.

Moisture	≤5%
Appearance	white powder
pH stability	2–12
MW (approximate)	high MW ≥ 1,000,000 g/mol
Viscosity (2%, 25°C)	3000–5000 mPa·s

Hydroxyethyl Cellulose HEC QP-100MH (Hydrophobically Modified)

Specifications

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