C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/401, 400/919
C08F 8/00 (2006.01) C08F 240/00 (2006.01) C09D 11/10 (2006.01)
Patent
CA 1144693
ABSTRACT OF THE DISCLOSURE A carboxyl modified, metal-free petroleum resin comprising a resin obtained by thermal polymerization of a feed containing cyclopentadiene and/or methylcyclopentadiene and/or derivatives thereof having been reacted electrophilically with a carboxylic acid, said modified resin having an acid number less than 20, containing from 1 wt. % to 5 wt. % of oxygen and having a softening point of from 120° to 200°C. These resins may be prepared by heating a resin obtained by thermal polymerization of a feed containing a cyclopentadiene and/or methylcyclo- pentadiene and/or derivatives thereof with a carboxylic acid to a temperature in the range 200°C to 270°C and subsequently removing free acid to reduce the acid number to below 20. These resins may be used for offset printing inks, and suitable printing ink compositions comprise (a) 5 to 30% by weight of such a resin (b) 5 to 30% by weight of a drying oil, (c) 20 to 40% by weight of a pigment, (d) 0 to 10% by weight of an assistant, and (e) a solvent being the balance, the weight percentages of components (a), (b), (c) and (d) being based on the total weight of the composition.
323830
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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