Preparation of modified petroleum resins
AssigneeStamicarbon B.V.
InventorJan Laarkamp
Life of this patent
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Abstract
Petroleum resin comprising units of cyclopentadiene, methyl cyclopentadiene or both is reacted at 150.degree.-320.degree.C with an unsaturated fatty acid, such as tall oil fatty acid, in the presence of magnesium oxide or other metal compound for a period of time until a modified resin having a melting point of at least 125.degree.C, preferably 140.degree.-160.degree.C is obtained. The resulting resins are especially useful as binding and thickening agents for printing ink resulting in an ink that dries rapidly and is resistant to rubbing.
Claims28
In a process for the preparation of a modified petroleum resin comprising mixing and reacting together, at a temperature of about 150.degree. C. to about 320.degree. C:
- a. a weakly unsaturated petroleum resin, and
- b. from about 5 to about 50% by weight, calculated on the amount of resin component (a), at least one unsaturated fatty acid having from 12-30 carbon atoms, the improvement comprising using a weakly unsaturated petroleum resin composed essentially of polymerized units of cyclopentadiene, methyl cyclopentadiene or both and obtained by thermal polymerization of essentailly cyclopentadiene, methylcyclopentadiene or dimers thereof, having a melting point between 70.degree. C. and 200.degree. C. and a bromine number, expressed as grams of bromine per 100 grams of resin, of less than 150, and conducting the reacting in the presence of from about 0.05 to about 5% by weight, calculated on the amount of resin component (a), of metal compound soluble in the reaction mixture and substantially free from forming strongly colored products in combination with components (a) and (b), the metal selected from the group consisting of magnesium, aluminum and zinc, and continuing the reaction until a resin product having a melting point of at least 125.degree. C. is obtained.
In a process for the preparation of a modified petroleum resin comprising mixing and reacting together, at a temperature of about 260.degree.C to about 275.degree.C:
- a. a weakly unsaturated petroleum resin, and
- b. from about 5 to about 50% by weight, calculated on the amount of resin component (a), at least one unsaturated fatty acid having from 12-30 carbon atoms;
- the improvement comprising using a weakly unsaturated petroleum resin composed essentially of polymeric units of cyclopentadiene, methyl cyclopentadiene or both and obtained by thermal polymerization of essentially cyclopentadiene, methyl cyclopentadiene or dimers thereof, having a melting point between 70.degree.C and 120.degree.C and a bromine number, expressed as grams of bromine per 100 grams of resin, of less than 120, and conducting the reaction in the presence of from about 0.05 to about 5% by weight, calculated on the amount of resin component (a), of metal compound soluble in the reaction mixture and substantially free from forming strongly colored products in combination with components (a) and (b), the metal selected from the group consisting of magnesium, aluminum and zinc, and continuing the reaction until a resin product having a melting point of at least 125.degree.C. is obtained.
In a process for the preparation of a modified petroleum resin comprising heating at a temperature of about 240.degree.C to about 290.degree.C:
- a. a weakly unsaturated petroleum resin with
- b. from about 5 to about 50% by weight, calculated on the amount of resin component (a), at least one unsaturated fatty acid having from 12-30 carbon atoms;
- the improvement comprising using a weakly unsaturated petroleum resin composed essentially of polymeric units of cyclopentadiene, methyl cyclopentadiene or both and obtained by thermal polymerization of essentially cyclopentadiene, methyl cyclopentadiene or dimers thereof, having a low melting point and a bromine number, expressed as grams of bromine per 100 grams of resin, of less than 120 and heating the resin until a resin product having a higher melting point of 140.degree.-180.degree.C is produced, and thereafter mixing and reacting resin component (a) at a temperature of about 240.degree.C to about 260.degree. and conducting the reaction in the presence of from about 0.05 to about 5% by weight, calculated on the amount of resin component (a), of metal compound soluble in the reaction mixture and substantially free from forming strongly colored products in combination with components (a) and (b), the metal selected from the group consisting of magnesium, aluminum and zinc, and continuing the reaction until a resin product having a melting point of from 140.degree.-160.degree.C is obtained.
Dependencies are inferred from the claim text.