# US 5,350,796 A · Wet strength resin composition

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- Number: US 5,350,796 A
- Document ID: US5350796A
- Status: Granted
- Kind: A
- Application number: 08/142,642
- Filed: 1993-10-25
- Granted: 1994-09-27
- Earliest claimed: 1991-05-03
- Assignees: Henkel Corporation
- Inventors: David I. Devore; Nancy Clungeon; Stephen A. Fischer
- Web page: https://patentgrep.com/patent/US5350796A

## CPC

- D21H 17/00: Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H 17/55: Polyamides; Polyaminoamides; Polyester-amides
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR

## Abstract

A composition for improving the wet strength of cellulosic fibrous webs is comprised of an aminopolyamide-epichlorohydrin acid salt resin having an E/N ratio of from about 0.6 to about 2.0 and from about 1% to about 35% of a water soluble cationic polymer based on the weight of the resin. The composition has a total organic chlorine content of from about 0.5% to 1.0% by weight based on the weight of the aminopolyamide-epichlorohydrin acid salt resin.

## Claims

### Claim 1

A composition consisting essentially of an aminopolyamide-epichlorohydrin acid salt resin having an E/N ratio of from about 0.6 to about 2.0 and from about 1% to about 35% by weight based on the weight of said resin of polydimethyldiallylammonium chloride.

### Claim 2

A composition consisting essentially of water and from about 1% to about 60% by weight of an aminopolyamide-epichlorohydrin acid salt resin having an E/N ratio of from about 0.6 to about 2.0; and from about 1% to about 35% by weight based on the weight of polydimethyldiallylammonium chloride.

### Claim 3 (depends on 1)

The composition of claim 1 wherein said E/N ratio is from about 0.6 to about 1.0.

### Claim 4 (depends on 1)

The composition of claim 1 wherein said E/N ratio is about 1.0.

### Claim 5 (depends on 1)

The composition of claim 1 wherein the amount of said polydimethyldiallylammonium chloride is from 5% to about 15% by weight based on the weight of said resin.

### Claim 6 (depends on 1)

The composition of claim 1 wherein the amount of said polydimethyldiallylammonium chloride is about 10% by weight based on the weight of said resin.

### Claim 7 (depends on 2)

The composition of claim 2 wherein said E/N ratio is from about 0.6 to about 1.0.

### Claim 8 (depends on 2)

The composition of claim 2 wherein said E/N ratio is about 1.0.