8/12/2019 Delhi Phenolic Yellowing

http://slidepdf.com/reader/full/delhi-phenolic-yellowing 1/2

A0102

INTRODUCTION

Phenolic Yellowing Storage Yellowing)Textile fabrics and packaging materials (that contain BHT) come into contact with each other

during storage or transportation.

Here again, antioxidants are converted into yellow compounds by the action of NOx-gases.

A treatment with special kind of anti-yellowing inhibitors offers a long lasting protection of textile

against storage yellowing.

ANTI-YELLOWING INHIBITOR FOR NYLON FABRICS

CHEMICAL COMPOSITION: Aqueous preparation of alkylsulphonate salt

CHARACTERISTICS:

Application material

Application field

Appearance:

Ionicity:

Solubility / Emulsifiability:

PH-value of 1% solution:

Resistance:

Storage:

Stability to frost:

Usage method:

APPLICATION PROPERTIES:

● The yellowing of stored textiles essentially depends on the following conditions:

• the presence of a sterically hindered phenol (e.g. BHT)

• the presence of nitrogen oxides• humidity, time and temperature

● prevents yellowing in the presence of BHT which is often present in plastic bags, elastane,

polyurethane foam(in bras) etc.● It can be applied to polyamide textiles, especially white and pale shade goods● One-bath with optical brightening or dyeing by exhaust process● high affinity with polyamide fiber● good resistant to washing● free from APEO● biodegradable

ADDITIONAL INFORMATION:

Product Number:roduct Name: AY-T

exhaust process

storage and transportation

Finishing

Auxiliary

polyamide as well as their mixtures with elastane

FULI TEXTILE HUI ZHOU) CO., LTD.

Anti-Yellowing Inhibitor Phenolic Yellowing)

AY-T

brown liquid

Anionic

miscible in cold water

pH7-pH9

at least 12 months if properly stored

not sensitive to frost

no thermal decomposition when stored and handled

8/12/2019 Delhi Phenolic Yellowing

http://slidepdf.com/reader/full/delhi-phenolic-yellowing 2/2

A0102roduct Number:roduct Name: AY-T

Finishing

Auxiliary

FULI TEXTILE HUI ZHOU) CO., LTD.

Anti-Yellowing Inhibitor Phenolic Yellowing)

AY-T

Test Method

The Phenolic yelllowing test Marks & Spencer C20B is often prescribed and used for testing of the

tendency to storage yellowing.● The textile fabrics is put between a special impregnated paper and stored under defined

conditions at 50℃ for 16 hours.● After the treatment the tendency to yellowing is visible.● Use standard grey scale to evaluate the color between the specimen and the original sample.

How Anti-Yellowing Inhibitor work?

1. Yellowing of the polyamide fibre

+ +

2. Action of Anti Yellowing Inhibitor

+ + +nti-

Yellowing

Inhibitor

C(CH3)3OH

(H3C)3

NO

N

H

H

C(CH3)3O -

(H3C)3

NO

NH3+

Yellow complexBHT+NOX =Colourless

PA-fibre

C(CH3)3OH

(H3C)3

NO

N

H

H

C(CH3)3OH

(H3C)3

NO

NH3+

Colourless complex

PA-fibre

BHT+NOX =Colourless