Preparation of modified petroleum resins

Claim 2

In a process for the preparation of a modified petroleum resin comprising mixing and reacting together, at a temperature of about 150° C. to about 320° 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° C. and 200° 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° C. is obtained.

Claim 3

The process according to claim 1 wherein the petroleum resin (a) has a melting point between 140°C and 180°C.

Claim 4

The process according to claim 1 wherein the petroleum resin of (a) has a bromine number of 30-75.

Claim 5

The process according to claim 1 wherein the process is conducted at a temperature of about 240° C to about 275° C.

Claim 6

The process according to claim 1 wherein the amount of fatty acid component (b) is 10-30 % by weight.

Claim 7

The process according to claim 1 wherein the fatty acid component (b) is tall-oil fatty acid.

Claim 8

The process according to claim 1 wherein the fatty acid component (b) is selected from the group consisting of oleic acid, linolenic acid, linoleic acid, palmitoleic acid, elaidic acid, ricinoleic acid, petroselic acid, arachidonic acid, cetoleic acid and mixtures thereof.

Claim 9

The process according to claim 1 wherein the amount of the metal compound is from 0.1 to 1.0 % by weight.

Claim 10

The process according to claim 1 wherein the metal is magnesium.

Claim 11

The process according to claim 1 wherein the metal compound is selected from the group consisting of zinc oxide, zinc oleate, aluminum oleate, aluminum oxide, magnesium oxide, magnesium stearate and magnesium oleate.

Claim 12

The process according to claim 1 wherein the reaction is conducted in the absence of oxygen.

Claim 13

The process according to claim 1 wherein the reaction is continued until a resin product having a melting point of 140°-160°C is obtained.

Claim 14

A process according to claim 1 in which the reaction is carried out in the presence of an olefinically unsaturated aromatic hydrocarbon in a proportion of from 1 to 6 % by weight based on the said petroleum resin.

Claim 15

A process according to claim 1 in which the reaction is carried out in the presence of a mixture of acrylic acid or methacrylic acid and an alkylester of acrylic acid or of methacrylic acid or of a copolymer derived from such monomers, in a proportion of from 1 to 10 % by weight based on the said petroleum resin.

Claim 16

The process according to claim 1 wherein there is further included in the reaction mixture from 5-100 % by weight, calculated on the amount of resin component (a), a phenol-formaldehyde resin having an aldehyde to phenol ratio between 1 : 1 and 2 : 1.

Claim 17

The process according to claim 15 wherein the phenol-formaldehyde resin is formed in situ under the reaction conditions.

Claim 18

The process according to claim 15 wherein the amount of said phenol-formaldehyde resin is from 15-45 % by weight.

Claim 19

The process according to claim 15 wherein the process is conducted at a temperature of about 225°C to about 275°C.

Claim 20

The process according to claim 1 wherein there is further included in the reaction mixture from 1-25 % by weight, calculated on the amount of resin component (a) a substituted or unsubstituted phenol having from 7-16 carbon atoms.

Claim 21

The process according to claim 19 wherein the amount of said phenol is from 4-10 % by weight.

Claim 22

The process according to claim 19 wherein the process is conducted at a temperature of about 225°C to about 275°C.

Claim 23

The process according to claim 1 wherein there is further included in the reaction mixture from 0.5 to 20 % by weight, calculated on the amount of resin component (a), at least one resin acid selected from the group consisting of abietic acid, neo abietic acid laevopimaric acid and mixtures thereof.

Claim 24

The process according to claim 22 wherein the amount of resin acid is from 1.5-5 % by weight.

Claim 25

The process according to claim 22 wherein the process is conducted at a temperature of about 240°C to about 275°C.

Claim 26

In a process for the preparation of a modified petroleum resin comprising mixing and reacting together, at a temperature of about 260°C to about 275°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°C and 120°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°C. is obtained.

Claim 27

In a process for the preparation of a modified petroleum resin comprising mixing and reacting together, at a temperature of about 260°C to about 275°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°C and 120°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°C. is obtained.

Claim 28

In a process for the preparation of a modified petroleum resin comprising heating at a temperature of about 240°C to about 290°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°-180°C is produced, and thereafter mixing and reacting resin component (a) at a temperature of about 240°C to about 260° 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°-160°C is obtained.

Claim 29

In a process for the preparation of a modified petroleum resin comprising heating at a temperature of about 240°C to about 290°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°-180°C is produced, and thereafter mixing and reacting resin component (a) at a temperature of about 240°C to about 260° 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°-160°C is obtained.

Claim 30

A modified resin consisting substantially of units derived from cyclopentadiene, methyl cyclopentadiene or their mixture produced by the process of claim 1.

Claim 31

The process according to claim 1 wherein the metal compound is an oxide of said metal or a carboxylic salt of said metal.