Method for producing resins for printing inks
AssigneeNippon Oil Co., Ltd.
InventorsShozo Tsuchiya, Hideo Hayashi, Hisatake Sato
Life of this patent
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Abstract
A method for producing a resin for printing ink, which comprises reacting a dicylopentadiene resin with an unsaturated carboxylic acid or its anhydride, the proportion of the unsaturated carboxylic acid or its anhydride being 0.01 to 0.5 mol per 100 g of the dicyclopentadiene resin, and then esterifying the acid-modified resin so obtained with an aliphatic monohydric alcohol in an amount of 0.2 to 2.0 mols per mol of the unsaturated carboxylic acid or its anhydride used in the reaction.
Claims13
A method for producing a resin for offset printing ink, which comprises (1) reacting (A) a dicyclopentadiene resin prepared by heat-polymerizing, in the absence of a catalyst, cyclopentadiene, dicyclopentadiene or an alkyl-substituted derivative thereof, said cyclopentadiene, dicyclopentadiene or alkyl-substituted derivative having a purity of at least 80% by weight and having a softening point in the range of from about 70.degree.to about 200.degree.C with (B) an unsaturated carboxylic acid or its anhydride selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, maleic anhydride, tetrahydrophthalic acid, tetrahydrophthalic anhydride, fumaric acid, citraconic acid and itaconic acid, the proportion of the unsaturated carboxylic acid or its anhydride being 0.01 to 0.5 mol per 100 g of the dicyclopentadiene resin, and (2) esterifying the acid-modified resin of step (1) with an aliphatic saturated or unsaturated monohydric alcohol having 6 to 22 carbon atoms in an amount of 0.2 to 2.0 mols per mol of the unsaturated carboxylic acid or its anhydride used in said reaction to provide a resin having a softening point of at least 100.degree.C.
A resin for printing ink comprising the esterified reaction product of (A) dicyclopentadiene resin with (B) 0.01 to 0.05 mol per 100 grams of (A) of unsaturated carboxylic acid or anhydride wherein said dicyclopentadiene resin (A) is prepared by heat-polymerizing, in the absence of a catalyst, cyclopentadiene, dicyclopentadiene or an alkyl-substituted derivative thereof, said cyclopentadiene, dicyclopentadiene or alkyl-substituted derivative having a purity of at least 80% by weight, said dicyclopentadiene resin having a softening point in the range of from about 70.degree. to about 200.degree.C;
- said carboxylic acid or anhydride is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, maleic anhydride, tetrahydrophthalic acid, tetrahydrophthalic anhydride, fumaric acid, citraconic acid and itaconic acid;
- said reaction product of (A) an (B) being esterified with an aliphatic saturated or unsaturated monohydric alcohol having 1 to 22 carbon atoms in an amount of 0.2 to 2.0 mols per mol of the unsaturated carboxylic acid or its anhydride (B) used in said reaction;
- said resin having a softening point of at least 100.degree.C.
Dependencies are inferred from the claim text.