# US 4,394,130 A · Copper phthalocyanines having trimethylammoniummethyl groups as paper dyes

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- Number: US 4,394,130 A
- Document ID: US4394130A
- Status: Granted
- Kind: A
- Application number: 05/647,432
- Filed: 1976-01-08
- Granted: 1983-07-19
- Earliest claimed: 1967-01-18
- Assignees: Sandoz Ltd.
- Inventors: Helmut Moser
- Web page: https://patentgrep.com/patent/US4394130A

## CPC

- C09B 47/32: Cationic phthalocyanine dyes
- C09B 67/0076: {Preparations of cationic or basic dyes in liquid form}
- D21H 21/28: Colorants {; Pigments or opacifying agents}
- Y10S 8/919: Paper
- C09B: ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES {, e.g. PIGMENTS}; MORDANTS; LAKES (fermentation or enzyme using processes to synthesise a desired chemical compound C12P)
- 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
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Dyes of the formula CuPc--CH.sub.2 --N.sup..sym. (CH.sub.3).sub.3 Cl.sup..crclbar.).sub.n, wherein CuPc is copper phthalocyanine, and n is 2 or 3, and mixtures thereof, are useful as paper dyes. The dyes may be added to paper stock prior to sheet formation or applied to paper in sheet form to produce turquoise colored paper. The dyed or printed paper is bleachable but has good fastness to light, wet treatments, alcohol and soap. The dyes are very soluble in water and exhaust well on, i.e., exhibit good substantivity to, paper.

## Claims

### Claim 1

A process for producing turquoise paper comprising (a) incorporating into paper stock an effective amount of a dye of the formula
CuPc--CH.sub.2 --N(CH.sub.3).sub.3 Cl.sup..crclbar.).sub.n,
or a mixture thereof, wherein
CuPc is a copper phthalocyanine radical having not more than 0.5 mol of sulfo group per molecule, and
n is 2 or 3,
said effective amount being an amount sufficient to impart the desired turquoise color to the paper to be formed, and (b) forming turquoise paper from said paper stock.

### Claim 2 (depends on 1)

A process according to claim 1 wherein CuPc is copper phthalocyanine.

### Claim 3 (depends on 2)

A process according to claim 2 wherein n is 3.

### Claim 4 (depends on 2)

A process according to claim 2 wherein n is 2.

### Claim 5 (depends on 2)

A process according to claim 2 wherein a mixture dyes wherein n is 2 or 3 is used.

### Claim 6 (depends on 2)

A process according to claim 2 comprising (a) admixing an effective amount of a dye of the formula
CuPc--CH.sub.2 --N(CH.sub.3).sub.3 Cl.sup..crclbar.).sub.n,
or a mixture thereof, wherein
CuPc is a copper phthalocyanine, and
n is 2 or 3,
with cellulose in an aqueous medium to form paper stock, said effective amount being an amount sufficient to impart the desired turquoise color to the paper to be formed, and (b) forming turquoise paper from said paper stock.

### Claim 7 (depends on 6)

A process according to claim 6 wherein said cellulose is chemically bleached sulfite cellulose.