Hydrogenated resin

Pentalyn H

Pentalyn H is a hard, pale amber, thermoplastic resin designed primarily as a tackifying resin for various types of polymer and elastomer-based adhesives. It is a pentaerythritol ester of wood rosin that has been stabilized by hydrogenation.

Key properties

In finished products, it contributes improved resistance to oxidation, greater heat stability, better retention of color, and greater retention of tack imparting properties than ordinary rosin esters.


  • Tackifier in pressure-sensitive adhesives needing heat, light, oxidation, and moisture resistance
  • Easily incorporated into solvent-based and hot melt adhesives
  • Tackifier for natural rubber, neoprene and SBR latex-based adhesives
Find out more

  • Tacky
  • Persistent adhesive
  • Resistant to oxidation
  • Resists aging

  • High bonding strength
  • Dispersible in aqueous media

Softening point, ring and ball, °C


Color, USDA rosin scale, max


Acid number


60% solids in solution in mineral spirits

Viscosity at 25 °C, Gardner­Holdt


Density at 25 °C, lb/gal (kg/l)

8.9 (1,07)


Bag, multiwall, kraft

Drum, lightweight, metal

Bulk, tank truck





Net weight

50 lbs, 22.68 kg

500 lbs, 226.8 kgs





Not regulated

International Nomenclature Cosmetic Ingredient (INCI)

Pentaerythrityl Hydrogenated Rosinate


21 CFR 175.105

21 CFR 176.210


21 CFR 175.125(b)
21 CFR 175.300
21 CFR 175.320
21 CFR 175.380
21 CFR 175.390
21 CFR 176.170
21 CFR 176.180
21 CFR 176.200

21 CFR 177.1200
21 CFR 177.1210
21 CFR 177.1400
21 CFR 177.2600
21 CFR 178.3120
21 CFR 178.3800
21 CFR 178.3850
21 CFR 178.3870

Pastillated or flaked resins may fuse, block, or lump during hot weather months, if stored near sources of heat, if double or triple stacked, or if stored for prolonged periods of time.

These forms of resin are prone to gradual oxidation, some more so than others. This could result in darkening and/or could have an adverse effect on solubility in organic solvents. Care should be given to minimize opportunities for product oxidation throughout processing.

Accordingly, it is strongly recommended that proper storage conditions and strict control of inventory be observed at all times, taking care that the oldest material is used first.