Rosin Modified Phenolic Resins

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Rosin Modified Phenolic Resins

Rosin modified phenolic resins are mainly used for offset printing ink. SEIKO PMC developed a rosin modified phenolic resin that can be used for high-speed printing and low-grade paper in the market. These resins impart functionality such as setting speed, pigment dispersibility, and water resistance to web offset, sheet-fed offset, and newspaper inks.

Product list

Product name Acid value Melting point
Heptane tolerance**2
OR-357 20 MAX 165~175 350~450 15~20 Water resistance, Low misting
OR-490 21 MAX 151~157 225~275 13~17 Water resistance, Low misting
OR-534 20 MAX 155~165 30~70 10~14 Quickly drying, Water resistance
OR-190 20 MAX 145~155 120~220 33~38 Water resistance, High gloss
OR-581 32 MAX 140~160 140~210 17~24 Water resistance, Solvent solubility

*1 Varnish for measurement resin: linseed-oil=35:65, measured by a vertical falling ball method (25℃)
*2 Solution for measurement resin: toluene=33.3:66.7, measured by heptane titration