# US 7,407,519 B2 · Process for improving the sun protection factor of cellulosic fibre material

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,407,519 B2
- Document ID: US7407519B2
- Status: Granted
- Kind: B2
- Application number: 11/650,009
- Filed: 2007-01-05
- Published: 2007-05-17
- Granted: 2008-08-05
- Earliest claimed: 2002-03-18
- Assignees: Ciba Specialty Chemicals Corporation
- Inventors: Georges Metzger; Fabienne Cuesta
- Web page: https://patentgrep.com/patent/US7407519B2

## CPC

- C11D 3/42: Brightening agents {; Blueing agents}
- C07D 251/68: Triazinylamino stilbenes
- C11D 3/28: Heterocyclic compounds containing nitrogen in the ring
- C11D 3/349: {additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea}
- D06M 13/07: Aromatic hydrocarbons
- D06M 13/358: Triazines
- C11D 3/3418: {Toluene -, xylene -, cumene -, benzene - or naphthalene sulfonates or sulfates}
- D06M 2101/06: cellulosic
- D06M 2200/25: Resistance to light or sun, i.e. protection of the textile itself as well as UV shielding materials or treatment compositions therefor; Anti-yellowing treatments
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

## Abstract

A process for improving the sun protection factor (SPF) of cellulosic fibre materials and blends thereof, which comprises contacting said materials with at least one compound of the formula (1) in which M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; R1 and R1′ independently of each other are —NH—R3, —N(R3)2 or —O—R3, wherein R3 is aryl substituted by —CO—X—R5, wherein X is O or NH and R5 is optionally substituted C1-C4-alkyl, R2 is a group of formula —O—R4 wherein R4 is hydroxy alkyl, alkoxy alkyl or hydroxy alkoxy alkyl, and R2′ has the meaning of R1 or R2.

## Claims

### Claim 1

A process for improving the sun protection factor (SPF) of cellulosic fibre materials and blends thereof, which comprises contacting said materials with at least one compound of the formula
in which M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine;
R1 and R1′ independently of each other are —NH—R3, wherein R3 is phenyl substituted by —CO—X—R5, wherein X is O or NH and R5 is 2-hydroxyethyl,
R2 is a group of formula —O—R4 wherein R4 is alkoxy alkyl or hydroxy alkoxy alkyl, and R2′ has the meaning of R1 or R2 and
additionally contacting said materials with at least one UV absorber selected from the group consisting of o-hydroxybenzophenone, o-hydroxyphenylbenzotriazole, 2-aryl-2H-benzotriazole, salicylic acid ester, substituted acrylonitrile, substituted acrylaminoethylene, nitrilohydrazone, o-hydroxyaryl-1,3,5-triazine, sulphonated 1,3,5-triazine and oxalic anilide UV absorbers and
where the SPF achieved is between 16.0 and 24.2.

### Claim 2 (depends on 1)

A process according to claim 1 wherein, in the compound of formula (1), R1 and R1′ are identical.

### Claim 3 (depends on 1)

A process according to claim 1, wherein, in the compound of formula (1), R2 and R2′ are identical.

### Claim 4 (depends on 1)

A process according to claim 1, wherein, in the compound of formula (1), R2 and R2′ are identical and are each —O—R4, wherein R4 is C1-C4-alkoxy-C1-C4-alkyl.

### Claim 5 (depends on 1)

A process according to claim 1, wherein the fibre material is additionally contacted with at least one oxalic anilide UV absorber.

### Claim 6 (depends on 1)

A process according to claim 1, wherein the amount of the compound of formula (1) used is from 0.001 to 2% by weight, based on the weight of the fibre material.

### Claim 7 (depends on 6)

A process according to claim 6, wherein the amount of the compound of formula (1) used is from 0.005 to 1% by weight, based on the weight of the fibre material.

### Claim 8 (depends on 6)

A process according to claim 6, wherein the amount of the compound of formula (1) used is from 0.01 to 0.5% by weight, based on the weight of the fibre material.

### Claim 9 (depends on 1)

A process according to claim 1, wherein the cellulosic fibre materials used have a density of between 30 and 200 g/m2.

### Claim 10 (depends on 1)

A process according to claim 1, wherein the cellulosic fibre materials used have a porosity of between 0.1 and 3%.

### Claim 11 (depends on 1)

A process according to claim 1, wherein the cellulosic fibre material used is cotton or a cotton blend.

### Claim 12 (depends on 1)

A process according to claim 1, wherein the cellulosic fibre materials used have a density of between 100 and 150 g/m2.

### Claim 13 (depends on 1)

A process according to claim 1, wherein the cellulosic fibre materials used have a porosity of between 0.1 and 1.5%.