Aromatic high softening point petroleum resins and process for its preparation

Claim 2

A process for preparing a high softening point resin which comprises polymerizing in the presence of at least a catalytic amount of aluminum chloride, an unsaturated hydrocarbon feedstock mixture in the ratio of: one part by weight of (1) a vinyl aromatic stream having a boiling range of from 135° to 220° C. and which comprises from 3% to 10% styrene, from 2% to 6% α-methyl styrene, from 15% to 25% vinyl tolune, from 10% to 18% indene and from 4% to 12% methyl indenes; and from 0.3 to 1 part by weight of (2) oligomers of a cyclopentadiene stream which comprises 0.5 to 6 wt.% butadienecyclopentadiene, 2 to 8wt.% isoprene-cyclopentadiene codimer, 25 to 40wt.% dicyclopentadiene, 3 to 10wt.% piperylene-cyclopentadiene codimer, 25 to 40 wt.% cyclopentadiene-methylcyclopentadiene codimer and 2 to 8 wt.% methylcyclopentadiene dimer; (b) quenching said polymerized hydrocarbon feedstock mixture to remove catalyst residues; and (c) finishing the washed polymerizate to provide a petroleum resin having a softening point of about 140° C. to about 160° C.

Claim 3

The process according to claim 1 wherein said aluminum chloride concentration ranges from 0.3 to 3.0 weight percent based on the total weight of the mixture and the polymerization is at a temperature of from 0° to 60° C.

Claim 4

The process according to claim 2 wherein the polymerization is continuous with a reaction residence time of from 0.05 to 2 hours.

Claim 5

The process according to claim 1 wherein the polymerization is batch and the aluminum chloride concentration ranges from 0.2 to 5.0 weight percent based on the total weight of the mixture and the polymerization is at a temperature of from 0° to 60° C. and is maintained for a period of 1 to 2 hours.

Claim 6

The process according to claim 1 wherein said polymerizing is batch and said aluminum chloride concentration ranges from 0.2 to 5.0 weight percent based on the total weight of the feedstock and said polymerizing is at a temperature of from 0° to 60° C. and for a period of one to two hours.

Claim 7

A high softening point petroleum resin prepared by a process which comprises (a) polymerizing in the presence of at least a catalytic amount of aluminum chloride, an unsaturated hydrocarbon feedstock mixture in the ratio of: one part by weight of (1) a vinyl aromatic stream having a boiling range of from 135° to 220° C. and which comprises from 3% to 10% styrene, from 2% to 6% α-methyl styrene, from 15% to 25% vinyl toluene, from 10% to 18% indene and from 4% to 12% methyl indenes; and from 0.3 to 1 part by weight of (2) oligomers of a cyclopentadiene stream which comprises 0.5 to 6 wt.% butadiene-cyclopentadiene, 2 to 8 wt.% isoprene-cyclopentadiene codimer, 25 to 40wt.% dicyclopentadiene, 3 to 10 wt.% piperylene-cyclopentadiene codimer, 25 to 40 wt.% cyclopentadiene-methylcyclopentadiene codimer, and 2 to 8 wt.% methycyclopentadiene dimer; (b) quenching said polymerized hydrocarbon feestock mixture with a water/isopropanol solution and thereafter washing it with water; and, (c) finishing the washed polymerizate to provide a petroleum resin having a softening point of about 140° C. to about 160° C. and a styrenes/indenes/oligomers molar ratio ranging from 0.5/0.4/1 to 3/1/1, respectively.

Claim 8

A high softening point petroleum resin prepared by a process which comprises (a) polymerizing in the presence of at least a catalytic amount of aluminum chloride, an unsaturated hydrocarbon feedstock mixture in the ratio of: one part by weight of (1) a vinyl aromatic stream having a boiling range of from 135° to 220° C. and which comprises from 3% to 10% styrene, from 2% to 6% α-methyl styrene, from 15% to 25% vinyl toluene, from 10% to 18% indene and from 4% to 12% methyl indenes; and from 0.3 to 1 part by weight of (2) oligomers of a cyclopentadiene stream which comprises 0.5 to 6 wt.% butadiene-cyclopentadiene, 2 to 8 wt.% isoprene-cyclopentadiene codimer, 25 to 40wt.% dicyclopentadiene, 3 to 10 wt.% piperylene-cyclopentadiene codimer, 25 to 40 wt.% cyclopentadiene-methylcyclopentadiene codimer, and 2 to 8 wt.% methycyclopentadiene dimer; (b) quenching said polymerized hydrocarbon feestock mixture with a water/isopropanol solution and thereafter washing it with water; and, (c) finishing the washed polymerizate to provide a petroleum resin having a softening point of about 140° C. to about 160° C. and a styrenes/indenes/oligomers molar ratio ranging from 0.5/0.4/1 to 3/1/1, respectively.

Claim 9

The resultant polymer according to claim 6 wherein said molar ratio ranges from 1.4/1.9/1.0 to 1.0/0.8/1.0, respectively.