Lewisol® 28

Lewisol® 28 resin is a glycerol ester of maleic-modified wood rosin.  It is a very hard, pale, thermoplastic resin that has excellent solubility and solvent release, and low solution viscosities in lacquer-type solvents.  These and other desirable properties make Lewisol 28 resin especially suitable for use in lacquers, low-bake enamels, printing inks, and grease-resistant coatings.

Product Code: 4278

Product Name

Lewisol® 28


  • Furniture lacquers, sanding sealers, and lacquer-type inks
  • Grease-resistant coatings
  • Specialty enamel formulations where it imparts hardness and high gloss
  • Type C gravure printing inks


  • Hard
  • Excellent solvent release
  • Low viscosity in lacquer solvents
  • Pale initial color
  • Adhesion
  • Wide range of solubility and compatibility

General Sales Specifications

Softening Point, Pinova drop method, °C 138-146
Color, USDA rosin scale, maximum M
Acid Number, mg KOH/g 30-40
60% solids solution in toluene:
- Viscosity at 25°C, Gardner-Holdt C-I
- Color, Gardner, maximum 11

Typical Properties

Softening Point, Pinova drop method °C 141
Color, USDA rosin scale N
Acid Number 37
Density at 25°C, lb/gal (kg/l) 9.4 (1.13)


Package Form Net Weight
Bag, multi-wall, Kraft Pastilles 50 lbs, 22.68 kgs


CAS No. 68038-41-5 US DOT: Not regulated
US FDA: 21 CFR 175.105
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 176.210
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

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.

Lewisol® 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. 3 – 12/13