# US 2009/0260769 A1 · Method for treating cellulose-containing fibers or planar structures containing cellulose-containing fibers

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- Number: US 2009/0260769 A1
- Document ID: US20090260769A1
- Status: Published application
- Kind: A1
- Application number: 12/438,312
- Filed: 2007-08-06
- Published: 2009-10-22
- Earliest claimed: 2006-08-25
- Assignees: Wacker Chemie AG
- Inventors: Christian Herzig; Willibald Burger; Monika Rappl
- Web page: https://patentgrep.com/patent/US20090260769A1

## CPC

- D21H 21/20: Wet strength agents
- C08G 73/02: Polyamines
- C08G 77/46: containing polyether sequences
- C08J 7/12: Chemical modification
- C08J 2301/00: Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- D21H 17/53: Polyethers; Polyesters
- D21H 17/55: Polyamides; Polyaminoamides; Polyester-amides
- D21H 17/56: Polyamines; Polyimines; Polyester-imides
- D21H 17/59: obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon
- D21H 27/002: {Tissue paper; Absorbent paper (D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00)}
- 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
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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

Cellulosic substrates are treated with compound(s) containing at least two primary amino groups and compounds containing at least one β-ketocarbonyl group. The substrates exhibit good strength and hand properties.

## Claims

### Claim at position 1

-18. (canceled)

### Claim 19

A method for treating a substrate of cellulose-containing fibers or planar structures containing cellulose-containing fibers, comprising treating with a combination of
(1) compounds having at least two primary amino groups and
(2) compounds having at least one β-ketocarbonyl group.

### Claim 20 (depends on 19)

The method of claim 19, wherein the compounds (2) contain β-ketocarbonyl groups of the formula
—Y′—C(O)—CHR4—C(O)—CH2R4
or their tautomeric enol form of the formula
—Y′—C(O)—CR4═C(CH2R4)—OH
in which
Y′ is —O—, —NR2— or
R2 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 30 C atoms, and
R4 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 18 C atoms.

### Claim 21 (depends on 19)

The method of claim 19, wherein Y′ is —O—.

### Claim 22 (depends on 19)

The method of claim 19, wherein one or both of R2 and R3 are hydrogen.

### Claim 23 (depends on 19)

The method of claim 19, wherein polyamine(s) are used as at least one compound (1).

### Claim 24 (depends on 19)

The method of claim 19, wherein β-ketocarbonyl-functional monomeric compounds (2a) of the formula
L(—Y—C(O)—CHR4—C(O)—CH2R4)e (I)
or their tautomeric enol forms
in which
e is an integer from 1 to 20,
L is a monomeric organic radical having the valency or functionality corresponding to the index e in formula (I), and
Y is —O— or —NR2—,
R2 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 30 C atoms, and
R4 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 18 C atoms,
are used as compounds (2).

### Claim 25 (depends on 24)

The method of claim 24, wherein e is 2 to 8.

### Claim 26 (depends on 19)

The method of claim 19, wherein β-ketocarbonyl-functional oligomeric or polymeric compounds (2b) of the formula
K(—Y—C(O)—CHR4—C(O)—CH2R4)f (III)
or their tautomeric enol forms, in which
f is an integer from 1 to 10,000,
K is an oligomeric or polymeric, organic or organosilicon radical having the valency or functionality corresponding to the index f in formula (III), and
Y is —O— or —NR2—, and
R4 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 18 C atoms,
are used as compounds (2).

### Claim 27 (depends on 26)

The method of claim 26, wherein an organopolysiloxane radical or an organopolysiloxane-containing copolymer radical is a radical K in the β-ketocarbonyl-functional oligomeric or polymeric compounds (2b).

### Claim 28 (depends on 19)

The method of claim 19, wherein β-ketocarbonyl-functional organosilicon compounds (2c) which contain at least one Si-bonded radical of the general formula
in which
—(Si≡) is the bond to the silicon atom,
R1 is a divalent organic radical having 1 to 6 carbon atoms which optionally contain non-adjacent nitrogen atoms,
R3 is a divalent organic radical having 1 to 6 carbon atoms,
Y is —O— or —NR2—,
R2 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 30 C atoms, and
R4 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 18 C atoms,
Z is a divalent to hexavalent organic radical having a monomeric, oligomeric or polymeric structure, which has a weight-based heteroatom content of at least 10%, which is bonded via C atoms,
E1 is a monofunctional terminal group or an Si—C-bonded radical of the formula
a is an integer from 1 to 5, and
x is 0 or an integer from 1 to 5,
are used as compounds (2).

### Claim 29 (depends on 28)

The method of claim 28, wherein Z is a polyether or polyester radical.

### Claim 30 (depends on 19)

The method of claim 19, wherein the treatment of the substrate is effected first with
(1) compounds having at least two primary amino groups and subsequently with
(2) compounds having at least one β-ketocarbonyl group.

### Claim 31 (depends on 19)

The method of claim 19, wherein the treatment of the substrate is effected with a mixture of
(1) compounds having at least two primary amino groups and
(2) compounds having at least one β-ketocarbonyl group,
the mixture of (1) and (2) being prepared before the treatment.

### Claim 32 (depends on 19)

The method of claim 19, wherein the compounds (1) are used in amounts of 1.1 to 500 mol of amino group per mole of β-ketocarbonyl group in compounds (2).

### Claim 33 (depends on 19)

The method of claim 19, wherein as the compounds (1) and (2) are used in the form of aqueous solutions or aqueous dispersions.

### Claim 34 (depends on 19)

The method of claim 19, wherein aqueous cellulose-containing fiber slurries are used as cellulose-containing fibers.

### Claim 35 (depends on 34)

The method of claim 34, wherein the compounds (1) and (2) are added to the aqueous cellulose-containing fiber slurries, the compounds (1) and (2) being added
(i) either individually in successive steps or
(ii) together as a premix of (1) and (2).

### Claim 36 (depends on 19)

The method of claim 19, wherein paper products, such as paper towels, are used as planar structures containing cellulose-containing fibers.

### Claim 37 (depends on 36)

The method of claim 36, wherein paper towels are the planar structures.

### Claim 38 (depends on 36)

The method of claim 36, wherein the compounds (1) and (2) are sprayed onto the paper products, the compounds (1) and (2) being sprayed on
(i) either individually in successive spraying steps or
(ii) together as a premix of (1) and (2).

### Claim 39

A paper product containing
planar structures containing cellulose-containing fibers, the planar structures furthermore containing a combination of
(1) compounds having at least two primary amino groups and
(2) compounds having at least one β-ketocarbonyl group.

### Claim 40 (depends on 38)

The paper product of claim 38, wherein the compounds (1) and (2) are added to aqueous cellulose-containing fiber slurries which are used for producing the planar structures.