Page 132 - Handbook of Adhesion Promoters

7.24 Rosin 125

PHYSICAL PROPERTIES
Color: white to beige to slightly reddish brown Ash content, %: 45
o
o
3
Melting point, C: 106-112 Density, at 20 C, kg/m : 1190-1650
20
pH: 6.5 Refractive index, n D : 1.57 State: liquid or solid
o
Viscosity at 20 C, mPa s: <400
HEALTH AND SAFETY
o
Flash point, C: 127 LD50, dermal rabbit, mg/kg: >2000
LD50, oral rat, mg/kg: 331 UN risk phrases, R: R22,R36/38,R50
UN safety phrases, S: S26,S61 UN/NA class: 2876
USE
Manufacturer: Evonik, Lanxess, Wholemark Fine Chemical
Outstanding properties: Cohedur RS is a component of the direct bonding system, also known as
RFS system. RFS bonding systems are multi-component
Recommended for resins: rubber, NBR, HNBR, CR, NR, IR, SBR, BR
Recommended for products: steel-belted radial tires, all-steel truck tires, conveyor belts, trans-
mission belts, hoses, rubberised fabrics
Recommended applications: combination with a formaldehyde donor (Hexa K) and fine particle
size silica whenever high static and dynamic bonding; used as a direct bonding agent for rubber to
fabric and rubber to steel cord bonding
Typical dose: 3.4 phr

7.24 ROSIN

GENERAL INFORMATION
Name: Eastman ester gum, CAS #: 65997-13-9, 65997-13- EC #: 266-042-9; 264-848-5;
Foral, Foralyn, Pexalyn, 9, 8050-15-5, 8050-26-8, 8050- 232-476-2; 232-482-5; 232-
Regalite R 31-5 479-9
Common synonym: ester of hydrogenated rosin; resin acid pentaerythritol esters
General description: bio-based Molecular mass: 366.54
Composition: 100% glyceryl hydrogenated rosinate; 100% pentaerythrityl hydrogenated rosinate;
100% methyl hydrogenated rosinate; 100% glycerol ester of rosin; resin acids and rosin acids,
esters with pentaerythritol, wood pulp based
Empirical formula: C25H34O2
PHYSICAL PROPERTIES
Acid #, mg KOH/g: 6-16 Ash content, %: <0.04
Color: water-white, light amber, amber, pale yellow Color, Gardner scale: <1 to 6
Solubility (diluents): aromatic and aliphatic hydrocarbons, esters, ketones and carbon tetrachlo-
ride, insoluble in methanol and ethanol
o
o
Freezing point, C: 85-101 (softening) Melting point, C: 77-110
3
o
Density, at 20 C, kg/m : 980-1080 Odor: slight, piney, odorless
20 o
Refractive index, n D : 1.519 Specific gravity at 23 C: 1.054-1.071
o
Solubility in water at 25 C, g/l: negligible State: liquid or solid