Pexalyn® 9100

Pexalyn® 9100 resin is a hard, pale, thermoplastic pentaerythritol ester of rosin produced via a special process that delivers light initial color and product stability. Pexalyn 9100 stabilized rosin ester is particularly suitable as a cost effective tackifier resin in hot melt and other types of adhesives. It is also useful as a resin modifier for elastomers and waxes.

Product Code: 4293

Product Name

Pexalyn® 9100


  • Tackifier resin for EVA hot melt adhesives
  • Tackifier resin for pressure sensitive adhesives formulated with polar polymers and elastomers
  • Modifier for elastomers and waxes


  • Light initial color
  • Good resistance to oxidation
  • Good thermal stability/pot life
  • Low volatility
  • Low odor
  • Promotes adhesion to porous and polar substrates
  • Widely compatible
  • Dispersible in aqueous media

General Sales Specifications

Softening Point, Ring & Ball, °C 97-106
Color, Gardner, 50% solids in toluene, max 5
Acid Number, mg KOH/g 7-16

Typical Properties

Softening Point, Ring & Ball, °C 100
Color, Gardner, 50% solids in toluene 3
Acid Number, mg KOH/g 12
Density at 25°C, lb./gal (kg/l) 8.8 (1.06)


Package Form Net Weight
Bag, multi-wall kraft Pastilles 50 lbs, 22.68 kgs
Bulk, tank truck Molten Varies


CAS No. 8050-26-8 US DOT: Not regulated
US FDA: 21 CFR 175.105
21 CFR 175.300
21 CFR 175.380
21 CFR 175.390
21 CFR 176.210
21 CFR 177.1210
21 CFR 177.2600

Other regulatory information available on request

Storage and Inventory Control

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.

Product Safety

Read and understand the Safety Data Sheet before using this product.

Pexalyn® is a registered trademark of Pinova, Inc.
© Pinova, Inc., 2010
Pinova® is a trademark of Pinova, Inc., Brunswick, Georgia, U.S.A.
The products and related information provided by Pinova are for manufacturing use only. Pinova makes no express, implied, or other representation, warranty, or guarantee concerning (i) the handling, use, or application of such products, whether alone, in combination with other products, or otherwise, (ii) the completeness, definitiveness, or adequacy, of such information for user’s or other purposes, (iii) the quality of such products, except that such products are of Pinova’s standard quality. Users are advised to make their own tests to determine the safety and suitability of each such product or product combination for their own purposes. Read and understand the Safety Data Sheet (SDS) before using this product.

Rev.2 – 7/11