# US 4,393,261 A · Hydrocarbon resin and process for preparation

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- Number: US 4,393,261 A
- Document ID: US4393261A
- Status: Granted
- Kind: A
- Application number: 06/421,632
- Filed: 1982-09-22
- Granted: 1983-07-12
- Earliest claimed: 1982-09-22
- Assignees: Eastman Kodak Company
- Inventors: Robert P. Allen
- Web page: https://patentgrep.com/patent/US4393261A

## CPC

- C08G 61/02: Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

This invention relates to novel hydrocarbon resins and processes for their preparation. More particularly, the invention relates to a liquid hydrocarbon resin prepared by polymerizing norbornene and xylene with a Friedel-Crafts catalyst. The polymerized resin is hydrogenated to provide water white liquid hydrocarbon resins useful as liquid tackifiers in preparing hot-melt adhesive formulations.

## Claims

### Claim 1

A process for preparing a liquid hydrocarbon resin having a Gardner color of about 8 to 18 and a viscosity of about 1,500 cp. at 38.degree. C. to about 7,000 cp. at 66.degree. C. comprising polymerizing a mixture of xylene and norbornene with a Friedel-Crafts catalyst at a temperature of about 60.degree. C. to about 170.degree. C. for a period of from 1 to 4 hours.

### Claim 2 (depends on 1)

A process according to claim 1 wherein said Friedel-Crafts catalyst is aluminum trichloride.

### Claim 3 (depends on 1)

A process according to claim 1 wherein said Friedel-Crafts catalyst is moist boron trifluoride ethereate.

### Claim 4

A process for preparing a liquid hydrocarbon resin having a Gardner color of about 8 to 18 and a viscosity of about 1,500 cp. at 38.degree. C. to about 10,000 cp. at 38.degree. C. comprising polymerizing a mixture of xylene and norbornene with a Friedel-Crafts catalyst at a temperature of about 60.degree. C. to about 170.degree. C. for a period of from 1 to 4 hours.

### Claim 5 (depends on 4)

A process according to claim 4 wherein said Friedel-Crafts catalyst is aluminum trichloride.

### Claim 6 (depends on 4)

A process according to claim 4 wherein said Friedel-Crafts catalyst is moist boron trifluoride etherate.

### Claim 7

A process for preparing a liquid hydrocarbon resin having a Gardner color of about 2 or less and a vicosity of about 1,500 cp at 38.degree. C. to about 7,000 cp. at 66.degree. C. comprising polymerizing a mixture of xylene and norbornene with a Friedel-Crafts catalyst at a temperature of about 60.degree. C. to about 170.degree. C. for a period of from 1 to 4 hours and hydrogenating to provide a water white liquid hydrocarbon resin.

### Claim 8 (depends on 7)

A process according to claim 7 wherein said Friedel-Crafts catalyst is aluminum trichloride.

### Claim 9 (depends on 7)

A process according to claim 7 wherein said Friedel-Crafts catalyst is moist boron trifluoride.

### Claim 10

A process for preparing a liquid hydrocarbon resin having a Gardner color of about 2 or less and a viscosity of about 1,500 cp. at 38.degree. C. to about 10,000 cp. at 38.degree. C. comprising polymerizing a mixture of xylene and norbornene with a Friedel-Crafts catalyst at a temperature of about 60.degree. C. to about 170.degree. C. for a period of from 1 to 4 hours and hydrogenating to provide a water white liquid hydrocarbon resin.

### Claim 11 (depends on 10)

A process according to claim 10 wherein said Friedel-Crafts catalyst is aluminum trichloride.

### Claim 12 (depends on 10)

A process according to claim 10 wherein said Friedel-Crafts catalyst is moist boron trifluoride.