# US 7,410,110 B2 · Efficient process for making tackifiers and adhesives

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- Number: US 7,410,110 B2
- Document ID: US7410110B2
- Status: Granted
- Kind: B2
- Application number: 11/393,603
- Filed: 2006-03-30
- Published: 2007-03-01
- Granted: 2008-08-12
- Earliest claimed: 2005-08-30
- Assignees: Uchicago Argonne, LLC
- Inventors: Bassam J. Jody; Edward J. Daniels
- Web page: https://patentgrep.com/patent/US7410110B2

## CPC

- B29B 13/10: by grinding, e.g. by triturating; by sieving; by filtering
- B29B 2009/125: {Micropellets, microgranules, microparticles}
- B29K 2105/0097: {Glues or adhesives, e.g. hot melts or thermofusible adhesives}
- 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
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

An improved process for preparing tackifiers and adhesives is an improved energy efficient process for preparing tackifiers, adhesives and dispersions of low-molecular weight polymers and other materials in water. Fine grinding of a low molecular weight polymer is performed to provide the low molecular weight polymer reduced to a selected average particle size in a range between approximately 2.5 μm and approximately 7.5 μm with a maximum particle size of less than 10 μm.

## Claims

### Claim 1

A method for preparing tackifiers and adhesives comprising the steps of:
providing a low-molecular weight polymer;
cooling said low molecular weight polymer;
grinding said low molecular weight polymer to provide a reduced average particle size, said reduced average particle size provided in a range between approximately 2.5 μm and approximately 7.5 μm with a maximum particle size of less than 10 μm; and
directly forming a dispersion by mixing said low molecular weight polymer of reduced average particle size with water.

### Claim 2 (depends on 1)

A method for preparing tackifiers and adhesives as recited in claim 1 wherein the step of providing said low-molecular weight polymer includes providing low molecular weight polymer chips.

### Claim 3

A method for preparing tackifiers and adhesives comprising the steps of:
providing chips of low-molecular weight polymer;
cooling said chips of said low-molecular weight polymer using liquid N2 for enhanced reduction in said average particle size;
grinding said low molecular weight polymer chips to provide a reduced average particle size, said reduced average particle size provided in a range between approximately 2.5 μm and approximately 7.5 μm with a maximum particle size of less than 10 μm.

### Claim 4 (depends on 3)

A method for preparing tackifiers and adhesives as recited in claim 3 wherein the step of grinding said low molecular weight polymer includes using jet mills for grinding said low molecular weight polymer.

### Claim 5 (depends on 3)

A method for preparing tackifiers and adhesives as recited in claim 3 wherein the step of grinding said low molecular weight polymer includes using centrifugal mills for grinding said low molecular weight polymer.

### Claim 6 (depends on 3)

A method for preparing tackifiers and adhesives as recited in claim 3 wherein said reduced average particle size of said low-molecular weight polymer has a volumetric diameter of less than 10 μm.