# US 8,772,387 B2 · Dispersion adhesives, a process for preparing them and use thereof

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- Number: US 8,772,387 B2
- Document ID: US8772387B2
- Status: Granted
- Kind: B2
- Application number: 13/268,111
- Filed: 2011-10-07
- Published: 2012-05-17
- Granted: 2014-07-08
- Earliest claimed: 2010-10-13
- Assignees: Rhein Chemie Rheinau GmbH
- Applicants: Wilhelm Laufer; Peter Schuster; Christian Scheffner
- Inventors: Wilhelm Laufer; Peter Schuster; Christian Scheffner
- Web page: https://patentgrep.com/patent/US8772387B2

## CPC

- C08G 18/797: {containing carbodiimide and/or uretone-imine groups}
- C08G 18/0828: {containing sulfonate groups or groups forming them}
- C08G 18/5024: {containing primary and/or secondary amino groups}
- C08G 18/706: {the liquid medium being water}
- C09J 175/06: from polyesters
- C08G 2170/80: Compositions for aqueous adhesives
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

The present claims relate to aqueous dispersion adhesives comprising at least one polyurethane dispersion and at least one carbodiimide having the general formula R′—(—N═C═N—R—)m—R″, in which m corresponds to an integer from 1 to 500, R=arylene and/or C7-C11 aralkylene, R′═R—NCO, and R″═—NCO, where in R′, independently of one another, R1 and R2 are identical or different and represent a C1-C6 alkyl, C6-C10 cycloalkyl or C7-C18 aralkyl radical.

## Claims

### Claim 1

Aqueous dispersion adhesives comprising at least one polyurethane dispersion and at least one carbodiimide of the formulae (II), (III) and/or (IV)
where R′″═C1-C18 alkylene, C5-C18 cycloalkylene, arylene and/or C7-C18 aralkylene and j within the molecule is identical or different and denotes 1 to 5, and p can be =0 to 500,
where x=1 to 500.

### Claim 2 (depends on 1)

The aqueous dispersion adhesives according to claim 1, wherein the carbodiimide is surface-deactivated by reaction with at least one amine.

### Claim 3 (depends on 1)

The aqueous dispersion adhesives according to claim 1, wherein the carbodiimide is present in the form of an aqueous dispersion.

### Claim 4 (depends on 1)

The aqueous dispersion adhesives according to claim 1, wherein the polyurethane dispersion is substantially an aqueous dispersion.

### Claim 5 (depends on 1)

The aqueous dispersion adhesives according to claim 1, wherein the polyurethane dispersion comprises aqueous polyurethanes, ionic polyurethanes, non-ionic polyurethanes, and polyester polyurethanes which contain polar groups and/or contain solvent, which are based on aromatic and/or aliphatic isocyanates.

### Claim 6 (depends on 1)

The aqueous dispersion adhesives according to claim 1, further comprising stabilizers, emulsifiers, thickeners and/or defoamers.

### Claim 7 (depends on 1)

A process for preparing the aqueous dispersion adhesives according to claim 1, comprising:
incorporating into the polyurethane dispersion with stirring said carbodiimide of the formulae (II) to (IV).

### Claim 8 (depends on 1)

A process for preparing furniture, textile and panels for automotive industries and/or footwear, comprising:
applying the aqueous dispersion adhesives according to claim 1 to the surface of the furniture, textile and panels for automotive industries and/or footwear.