Aquasorb OZ

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Aquasorb-OZ Powersil-NOZ
2009-2010
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Aquasorb-OZ Powersil-NOZ
Antiozonate Softener
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YELLOWING OF TEXTILES DUE TO ATMOSPHERIC
POLLUTANTS
Over the past two three decades the problem of
yellowing of textiles has become progressively
more widespread. It would be wrong to regard
yellowing as a phenomenon arising from a single
cause. There are more than 20 different ways
in which white or pale-coloured textiles can
undergo this undesirable change in appearance.
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The critical factors identified are

• Access to hindered phenol
• Access to air and NOx
• pH
• Auxiliaries
• Moisture
• Packaging

In the case of indigo-dyed textiles there is the
risk of the dyestuff being destroyed due to
environmental influences. This irreversible
destruction of the dyestuff is caused, amongst
others, by an interaction of ultraviolet
radiation, ozone nitrogen oxide -photochemical
smog. However, noxious gases may effect a
destruction of the dyestuff even without
ultraviolet radiation being involved. The
degradation products of the indigo are usually
yellow therefore we also speak of yellowing
during storage of the indigo.
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The critical factors identified are
This phenomenon is, for instance, observed when
looking at the folded edges of made-up jeans.
In a pile of folded jeans, the folded edges are
particularly affected since they are especially
exposed to light air.
The interior of the pile is protected against
detrimental influences by its relative
inaccessibility. Due to the extreme ring dyeing
of the warp yarn, the indigo dyestuff situated on
the surface is highly accessible to noxious
gases, such as NOx and O3.
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ATTACKING AGENTS
Ozone O3 Ozone is the strongest oxidizing
agent after fluorine. In organic chemistry it
serves to detect C-C double bonds. The general
bleaching effect of ozone on indigo is
well-known. Therefore the indigo dyestuff is
also used as an indicator dyestuff in detection
systems (e.g. Drager) which serve to measure the
ozone concentration. Nitrogen oxides Nox
Nitrogen oxides are also referred to as
nitrous gases. Nitrogen oxides are mainly
composed on nitrogen monoxide nitrogen dioxide.
They are known to be highly aggressive
agents.
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PROBLEMS CAUSED, AMONGST OTHERS, BY NOXIOUS GASES
Yellowing of optical brighteners due to
nitrogen oxides / ozone. Destruction of natural
rubber by ozone Changes of shade caused by
nitrogen oxides Yellowing of polyurethane fibres
due to nitrogen oxides sulphur
dioxide Destruction of indigo by ozone and
nitrogen
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COUNTER - MEASURES Storage of the textiles in
a controlled environment. Optimum ventilation of
the store rooms (circulating air). Nox is
heavier than air and accumulates on the
ground. Packing e.g. in polyethylene foil that
does not contain any migrating, light-inhibiting
stabilizers. Do not expose goods to
sunlight. Protective finishing with AQUASORB-OZ
Powersil-NOZ
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MECHANISM OF YELLOWING OF INDIGO-DYED TEXTILES
DUE TO AIR POLLUTANTS, SUCH AS OZONE NITROGEN
OXIDES     Ultraviolet radiation UV ozone O3
nitrogen oxides Nox.   Short wavelength portion
partly formed of the sunlight by UV
Nox e.g. from the combustion of   fossil
fuels photochemical smog
formation of aggressive radicals Ra
dical attack against the double-bonded,
conjugated indigo system
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H
O
N
N
O
Indigo
H
Formation of peroxide other radicals
destruction of the C-C double bond formation of
mostly yellow degradation products are
O
COOH
O
N
N
Phenylglycine (Colourless)
Isatine (Yellow)
H
H
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Aquasorb-OZ

• It is a quaternary ammonium softener used to
  protect indigo dyed fabric against ozone NOx
  fading .
• Economical Ecofriendly.

Powersil-NOZ

• Stable silicone emulsion
• Imparts excellent softness and better softening
  effect than conventional amino fluid
• Protect Indigo Dye from Ozone fading
• Eco friendly

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L.N.Chemical Industries
OFFICE ADDRESS - 403, Antariksh,
Makwana Road, Marol Naka, Andheri (E), Mumbai
400 059 Tel.- 91- 22- 4221 6789 (30 Lines)
91- 22- 6692 4112 Fax -91-22- 2836 6434
FACTORY ADDRESS - D- 14 /10, T.T.C. M.I.D.C
Industrial area, Turbhe , P.O.K.U.Bazar, Navi
Mumbai 400 705 Tel.-91- 22- 4141 9899 (30
Lines) Fax -91- 22- 4141 9888
Email ID ketan_at_lnchem.in
lnchem_at_vsnl.com