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Technical Data Sheet

  • Adhesives/sealants-B&C
  • Bookbinding
  • Caps & lids non-food contact
  • Carpet construction
  • Case and carton closures
  • Commerical printing inks
  • Film modification
  • Labels non food contact
  • Packaging component films
  • Packaging components non food contact
  • Packaging tape
  • Paints & coatings
  • Polymer modification
  • Protective coatings
  • Road markings
  • Roofing ingredients
  • Solder flux
  • Specialty tape
  • Tape non food contact
  • Tires
  • Wax ingredients
  • Wire/cable
Key Attributes
  • Alcohol-soluble
  • Non-crystalline
  • Resistant to oxidation
  • Thermoplastic rosin acid
  • Very high softening point

Product Description
Dymerex™ modified rosin is a pale, acidic, thermoplastic, high softening point resin. It is composed predominately of dimeric acids derived from rosin with lesser amounts of monomeric resin acids and neutral materials of rosin origin. Dymerex™ modified resin has high resistance to oxidation and does not crystallize from solutions or from solid compositions. It is compatible with many natural and synthetic film formers and rubbers. Being an acidic resin, it reacts readily with polyalcohols or hydrated lime to yield high melting derivatives.

Typical Properties

PropertyTest MethodTypical Value, Units
Ring and Ball Softening PointASTM E 28144 °C
Color, Gardnera 9
Color, USRG Rosin Scale N
Acid Number (mg KOH/g) 145
Molecular Weight Distributionb 
     Mn 412
     Mw 487
     Mw/Mn 1.18
     Mz 582
Melt Viscosity, Brookfield Thermosel 
     @ 150°C 153,000 cP
     @ 170°C 7,000 cP
     @ 190°C 740 cP
     @ 210°C 145 cP
     @ 20°C 1.069 kg/L
Description, Base Resin Dimerized Gum Rosin

a50% resins solids in toluene or xylene
bMolecular weight measured via Gel Permeation Chromatography (GPC) using polystyrene standards

Compatibility and Solubility
Compatible with ethylcellulose, natural rubber, SBR (styrene-butadiene), polychloroprene, drying oils, alkyd resins, shellac, low molecular weight polyethylene, paraffin and microcrystalline waxes.

Soluble in aromatic, aliphatic and chlorinated hydrocarbons, esters, ketones, and higher molecular weight alcohols. Insoluble in methanol, ethanol, isopropanol and water.

Dymerex™ Polymerized Rosin is packed in aluminum-kraft-bags of 25 kg net, and supplied on shrink-wrapped pallets of 28 bags each.

Because of the extremely large surface area they present, flaked forms of resins are prone to gradual oxidation, some more so than others. This could result in darkening and/or it could have an adverse effect on solubility in organic solvents. It is strongly recommended that strict control of inventory be observed at all times, taking care that the oldest materials is used first.

Dymerex™ Polymerized Rosin material will remain within product specification limit for a period of at least 18 months after shipment from Eastman's production facilities, provided storage conditions outlined in this data sheet are observed. However, as we can neither anticipate the conditions under which the resin is processed nor the end use applications for which it is used, we recommend that the material be tested upon receipt.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

2/28/2018 11:35:39 AM