# US 8,772,444 B2 · Method for producing petroleum resin

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- Number: US 8,772,444 B2
- Document ID: US8772444B2
- Status: Granted
- Kind: B2
- Application number: 13/808,421
- Filed: 2011-07-07
- Published: 2013-05-02
- Granted: 2014-07-08
- Earliest claimed: 2010-07-08
- Assignees: Idemitsu Kosan Co., Ltd.
- Applicants: Hajime Takasugi; Katsumi Furuta; Kazunori Saeki
- Inventors: Hajime Takasugi; Katsumi Furuta; Kazunori Saeki
- Web page: https://patentgrep.com/patent/US8772444B2

## CPC

- C08F 6/005: {from solid polymers}
- B29B 9/10: by moulding the material, i.e. treating it in the molten state
- C08F 8/04: Reduction, e.g. hydrogenation
- C08F 212/08: Styrene
- C08J 3/12: Powdering or granulating
- C08F 232/06: having two or more carbon-to-carbon double bonds
- C08J 2399/00: Characterised by the use of natural macromolecular compounds or of derivatives thereof not provided for in groups C08J2301/00 - C08J2307/00 or C08J2389/00 - C08J2397/00
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

## Abstract

A method for producing a petroleum resin including removing a low-molecular mist by means of a filter.

## Claims

### Claim 1

A method for producing a hydrogenated petroleum resin, the method comprising:
polymerizing a cyclopentadiene-based compound and an aromatic vinyl compound, thereby obtaining a polymer;
hydrogenating the polymer to prepare a molten hydrogenated petroleum resin; and
granulating the molten hydrogenated petroleum resin, thereby obtaining hydrogenated petroleum resin pellets,
wherein the granulating comprises sucking a low-molecular mist generated from the molten hydrogenated petroleum resin through a suction path having a filter in a granulator, and removing the low-molecular mist with the filter.

### Claim 2 (depends on 1)

The method of claim 1, wherein the filter is a glass fiber layer filter.

### Claim 3 (depends on 1)

The method of claim 1,
wherein the granulating comprises:
adding the molten hydrogenated petroleum resin dropwise to a steel belt in the granulator providing the suction path at any position of the steel belt where the molten hydrogenated petroleum resin is not solidified and
the granulator is a roll-drop granulator.

### Claim 4 (depends on 1)

The method of claim 1, wherein the petroleum resin is a copolymer or a hydrogenated polymer.

### Claim 5 (depends on 1)

The method of claim 1, wherein the cyclopentadiene-based compound is cyclopentadiene, methylcyclopentadiene, ethylcyclopentadiene, a dimer of cyclopentadiene, a dimer of methylcyclopentadiene, a dimer of ethylcyclopentadiene, a co-dimer of cyclopentadiene, a co-dimer of methylcyclopentadiene, or a co-dimer of ethylcyclopentadiene.

### Claim 6 (depends on 1)

The method of claim 1, wherein the aromatic vinyl compound is styrene, α-methylstyrene, or vinyltoluene.

### Claim 7 (depends on 1)

The method of claim 1, wherein the polymerizing is a thermal polymerization in a polymerization solvent comprising an aromatic-based solvent, a naphthene-based solvent, or an aliphatic hydrocarbon-based solvent.

### Claim 8 (depends on 7)

The method of claim 7, wherein the polymerization solvent is benzene, toluene, xylene, cyclohexane, dimethylcyclohexane, or ethylcyclohexane.

### Claim 9 (depends on 7)

The method of claim 7, wherein an amount of the polymerization solvent is 50 to 500 parts by mass of a monomer mixture.

### Claim 10 (depends on 7)

The method of claim 7, wherein the thermal polymerization comprises heating at least at 100° C. at time of starting a polymerization reaction.

### Claim 11 (depends on 10)

The method of claim 10, wherein a temperature of the polymerization reaction is from 150 to 350° C.

### Claim 12 (depends on 10)

The method of claim 10, wherein a pressure of the polymerization reaction is from 0 to 2 MPa.

### Claim 13 (depends on 1)

The method of claim 1, wherein the low-molecular mist comprises fine particles having an average molecular weight of 100 to 300.

### Claim 14 (depends on 1)

The method of claim 1, wherein when removing the low-molecular mist with the filter pressure loss is 0.5 to 2.5 kPa.

### Claim 15 (depends on 1)

The method of claim 1, wherein the filter is an inertial impaction filter, an interrupt filter, an electrostatic adsorption filter, a Brownian diffusion filter or a glass fiber filter.

### Claim 16 (depends on 5)

The method of claim 5, wherein the aromatic vinyl compound is styrene, α-methylstyrene, or vinyltoluene.