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Trixene As TDS

Trixene AS is a medium viscosity aromatic isocyanate used in single component moisture curing applications as a water or activity scavenger. It has a solids content over 99.5%, specific gravity of 1.1-1.2, NCO content of 12-16%, and viscosity of 500-2500 cps at 25°C. It is soluble in common solvents like ethyl acetate and glycol ethers, and can be used as a chain stopper or to neutralize reactive groups in urethane coatings and tar formulations.

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471 views2 pages

Trixene As TDS

Trixene AS is a medium viscosity aromatic isocyanate used in single component moisture curing applications as a water or activity scavenger. It has a solids content over 99.5%, specific gravity of 1.1-1.2, NCO content of 12-16%, and viscosity of 500-2500 cps at 25°C. It is soluble in common solvents like ethyl acetate and glycol ethers, and can be used as a chain stopper or to neutralize reactive groups in urethane coatings and tar formulations.

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sriatul2006
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Trixene AS

Baxenden Chemicals Limited


Speciality Chemicals Division, Paragon Works, Baxenden,
Nr Accrington, Lancashire BB5 2SL England
Tel: +44 (0) 1254 872278 Fax: +44 (0) 1254 393729

Technical Information
Trixene AS is a medium viscosity, monofunctional aromatic isocyanate of low molecular weight mainly used
in single component moisture curing applications as a water or activity scavenger.

Typical Properties
Solids Content % 99.5 Min.
Specific Gravity 1.1 – 1.2
NCO Content % 12 – 16
Free Monomer <0.5
Colour Gardner 10 Max.
Flash Point ºC (ACC) >100
Viscosity cps at 25ºC 500 – 2500
Boiling Point ºC 760mm Hg 190 with decomposition
Freezing Pint ºC Approx. 10

Solubility
Most common solvents, including ethyl acetate, butyl acetate, glycol ethers, glycol ether esters, methyl ethyl
ketone, methyl isobutyl ketone, cyclohexanone, methylene chloride, toluene, xylene and most aromatics can
be used as diluents for Trixene AS provided that the solvents used have a low water content (0.05%
maximum).

Solvents containing active hydrogen groups, eg alcohols, amines, etc. should not be used because of
possible reaction with the terminal isocyanate groups of the prepolymers.

Users
Suggested applications for this monoisocyanate include its use as a chain stopper in urethane
polymerisation and as a scavenger for undesirable reactive groups in urethane raw materials. In coal
tar/urethane coatings, it may be used to neutralise the amine and hydroxy groups in the tar and to absorb
water in the tar which can cause premature gelation and foaming of the tar/urethane prepolymer blend.

The addition of 1.8% of Trixene AS to coal tar containing 0.1% of active amine and hydroxy groups will lead
to their complete neutralisation.
Similarly, the addition of 3.5% of Trixene AS will remove traces of water which have deleterious effects on
the performance of the coatings. 3.5% of Trixene AS will remove 0.1% of water from the tar.

The use of Trixene AS at levels higher than that necessary to neutralise moisture, amine or hydroxy activity
in coatings formulations may lead to significant reductions in cure rates and ultimate physical properties.

Baxenden Chemicals Ltd reserve the right to amend or alter specifications as necessary. Please consult the
relevant material Safety Data Sheet before using any Baxenden product.

Revised: 23.10.91

The recommendations made above are general in nature. Although every effort has been made to supply reliable data, it is for informational purposes only. We cannot guarantee
the results as stated to be obtained since we have no control over the end use of the material. Each user must make their own tests to determine the suitability of the material for
their own use. Nothing contained herein is intended as a recommendation to use our products to infringe any patent.

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