Name: HPMC Thickener E15
Brand: Coatingsink
SKU: hpmc-e15-thickener
Availability: InStock

Question 1

At what addition level should HPMC E15 be used in interior wall paints?

Accepted Answer

Typical use levels in interior emulsion paints are 0.1–0.3% on total formulation weight. At this range, E15 contributes sufficient anti-sag and open time extension without significantly raising high-shear viscosity, preserving spray and roll application characteristics. Always add to the water phase at the beginning of the grind stage for optimal dispersion.

Question 2

How does HPMC E15 affect open time versus associative thickeners like HEUR?

Accepted Answer

HPMC E15 retards surface drying by forming a hydrophilic film that slows water evaporation, extending open time by 15–30% compared to HEUR-only systems. Unlike HEURs, it does not accelerate film formation via associative networks, making it preferable for brush-and-roll decorative paints where lap mark suppression is a priority. Combining 0.1% E15 with a low-level HEUR often gives the best balance of open time and sag resistance.

Question 3

Is the FDA-grade version of HPMC E15 suitable for coatings on food-contact packaging?

Accepted Answer

Yes, the FDA-compliant grade of HPMC E15 meets CFR 21 §172.874 for indirect food-contact applications. It is used in overprint varnishes and paper coatings for dry-food packaging. Confirm the specific grade with your supplier and obtain a Declaration of Compliance; the standard industrial grade is REACH-registered but not necessarily FDA-notified.

Methoxyl Content	28–30%
Moisture Content	≤5%
pH (1% solution)	5.0–8.0
Viscosity (2%, 20°C)	12–18 mPa·s
Hydroxypropoxyl Content	7–12%

HPMC Thickener E15

Specifications

FAQ

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