Jumat, 14 Mei 2010

Interthane 990


Interthane 990
P o l y u r e t h a n e

Product Description
Intended Uses
PracticalIn formation for
Interthane 990


A two component acrylic polyurethane finish giving excellent durability and long term
Suitable for use in both new construction and as a maintenance finish which can be used
in a wide variety of environments including offshore structures, chemical and
petrochemical plants, bridges, pulp and paper mills, and in the power industry.

Colour Wide range via the Chromascan system
Gloss Level High gloss
Volume Solids 57% ± 3% (depends on colour)
Typical Thickness 50-75 microns (2-3 mils) dry equivalent to 88-132 microns
(3.5-5.3 mils) wet
Theoretical Coverage 11.40 m2/litre at 50 microns d.f.t and stated volume solids
457 sq.ft/US gallon at 2 mils d.f.t and stated volume solids
Practical Coverage Allow appropriate loss factors
Method of Application Airless spray, Air spray, Brush, Roller
Drying Time

Overcoating Interval with
Interthane 990 by Self
Temperature Touch Dry Hard Dry Minimum Maximum
-5°C (23°F) 8 hours 60 hours 60 hours Extended*
5°C (41°F) 5 hours 24 hours 24 hours Extended*
15°C (59°F) 2½ hours 10 hours 10 hours Extended*
25°C (77°F) 1½ hours 6 hours 6 hours Extended*
40°C (104°F) 1 hour 3 hours 3 hours Extended*
* See International Protective Coatings Definitions & Abbreviations
Flash Point Base (Part A) C/A (Part B) Mixed
34°C (93°F) 49°C (120°F) 35°C (95°F)
Product Weight 1.2 kg/l (10.3 lb/gal)
VOC 390 g/l UK - PG6/23(92), Appendix 3
3.30 lb/gal (395 g/l) USA - EPA Method 24

Page No. 1 of 4

Interthane 990
P o l y u r e t h a n e

All surfaces to be coated should be clean, dry and free from contamination. Prior to
paint application all surfaces should be assessed and treated in accordance with
ISO 8504:1992.
Primed Surfaces
Interthane 990 should always be applied over a recommended anti-corrosive coating
scheme. The primer surface should be dry and free from all contamination, and
Interthane 990 must be applied within the overcoating intervals specified (consult the
relevant product data sheet).
Areas of breakdown, damage etc., should be prepared to the specified standard (e.g.
Sa2½ (ISO 8501-1:1988) or SSPC-SP6, Abrasive Blasting, or SSPC-SP11, Power Tool
Cleaning) and patch primed prior to the application of Interthane 990.
Mixing Material is supplied in two containers as a unit. Always mix a
complete unit in the proportions supplied. Once the unit has
been mixed it must be used within the working pot life specified.
(1) Agitate Base (Part A) with a power agitator.
(2) Combine entire contents of Curing Agent (Part B) with Base
(Part A) and mix thoroughly with power agitator.
Mix Ratio 6 parts : 1 part by volume
Working Pot -5°C (23°F) 5°C (41°F) 15°C (59°F) 25°C (77°F) 40°C (104°F)
Life 26 hours 12 hours 4 hours 2 hours 45 minutes
Airless Spray Recommended - Tip range 0.33-0.45 mm (13-18 thou)
- Total output fluid pressure at spray tip not
less than 155 kg/cm2 (2,200 p.s.i.)
Air Spray Recommended Gun DeVilbiss MBC or JGA
(Pressure Pot) Air Cap 704 or 765
Fluid Tip E
Air spray Suitable Use suitable proprietary equipment.
Brush Suitable Typically 40-50 microns (1.5-2.0 mils) can be
Roller Suitable Typically 40-50 microns (1.5-2.0 mils) can be
Thinner International Do not thin more than allowed by local
GTA713 or GTA733 environmental legislation.
(or GTA056)
Cleaner International GTA713
(or GTA056)
Work Stoppages Do not allow material to remain in hoses, gun or spray equipment.
Thoroughly flush all equipment with International GTA713. Once
units of paint have been mixed they should not be resealed and it is
advised that after prolonged stoppages work recommences with freshly
mixed units.
Clean Up Clean all equipment immediately after use with International GTA713. It
is good working practice to periodically flush out spray equipment
during the course of the working day. Frequency of cleaning will
depend upon amount sprayed, temperature and elapsed time, including
any delays.
All surplus materials and empty containers should be disposed of in
accordance with appropriate regional regulations/legislation.

Page 2 of 4

Interthane 990
P o l y u r e t h a n e

Interthane 990 is available in a range of metallic finishes - please consult the separate
Interthane 990 Metallic Working Procedures document for further information.
Level of sheen and surface finish is dependent on application method. Avoid using a
mixture of application methods whenever possible. Best results in terms of gloss and
appearance will always be obtained with conventional air spray application.
For brush and roller application, and in some colours, two coats of Interthane 990 may
be required to give uniform coverage, especially when applying Interthane 990 over dark
undercoats, and when using certain lead free bright colours such as
yellows and oranges. Best practice is to use a colour compatible intermediate or anticorrosive
coating under the Interthane 990.
When overcoating after weathering, or ageing, ensure the coating is fully cleaned to
remove all surface contamination such as oil, grease, salt crystals and traffic fumes,
before application of a further coat of Interthane 990.
Absolute measured adhesion of topcoats to aged Interthane 990 is less than that to fresh
material, however, it is adequate for the specified end use.
This product must only be thinned using the recommended International thinners. The
use of alternative thinners, particularly those containing alcohols, can severely inhibit the
curing mechanism of the coating.
Temperature of the surface to be coated must be 3°C (5°F) above the dew point.
When applying Interthane 990 in confined spaces ensure adequate ventilation.
Low temperature, high humidity and condensation occurring during or immediately after
application may result in a matt finish and inferior film.
Premature exposure to ponding water will cause colour change, especially in dark colours
and at low temperatures.
This product is not recommended for use in immersion conditions. When severe
chemical or solvent splashing is likely to occur contact International Protective Coatings
for information regarding suitability.
A modified version of Interthane 990 is available for use within the Korean marketplace
in order to provide improved workability.
The following primers/intermediates are recommended for Interthane 990:
Intercure 200 Interplus 356
Intercure 200HS Interprime 198
Intercure 420 Interseal 670HS
Intergard 251 Interzinc 42
Intergard 269 Interzinc 52
Intergard 270 Interzinc 52HS
Intergard 345 Interzinc 315
Intergard 475HS Interzone 505
InterH20 401 Interzone 954
Interplus 256 Interzone 1000
Interthane 990 is designed to be topcoated with itself.
For other suitable primers/intermediates, consult International Protective Coatings.

Page No. 3 of 4

20 litre unit Interthane 990 Base 17.14 litres in a 20 litre container
Interthane 990 Curing Agent 2.86 litres in a 3.7 litre container
5 gallon unit Interthane 990 Base 4.29 gallons in a 5 gallon container
Interthane 990 Curing Agent 0.71 gallons in a 1 gallon container
For availability of other pack sizes contact International Protective Coatings
U.N. Shipping No. 1263
20 litre unit 23.1 kg (50.9 lb) Base (Part A) 3.5 kg (7.7 lb) Curing Agent (Part B)
5 gallon unit 21.6 kg (47.6 lb) Base (Part A) 3.2 kg (7.1 lb) Curing Agent (Part B)
Shelf Life 12 months minimum at 25°C (77°F). Subject to re-inspection
thereafter. Store in dry, shaded conditions away from sources
of heat and ignition.
Pack Size
Shipping Weight
The information given in this sheet is not intended to be exhaustive and any person using the product for any purpose other than that specifically recommended in
this sheet without first obtaining written confirmation from us as to the suitability of the product for the intended purpose does so at his own risk. Any warranty, if
given, or specific Terms & Conditions of Sale are contained in International’s Terms & Conditions of Sale, a copy of which can be obtained on request. Whilst we
endeavour to ensure that all advice we give about the product (whether in this sheet or otherwise) is correct we have no control over either the quality or condition
of the substrate or the many factors affecting the use and application of the product. Therefore, unless we specifically agree in writing to do so, we do not accept
any liability whatsoever or howsoever arising for the performance of the product or for any loss or damage (other than death or personal injury resulting from our
negligence) arising out of the use of the product. The information contained in this sheet is liable to modification from time to time in the light of experience and
our policy of continuous product development.
It is the user’s responsibility to check that this sheet is current prior to using the product. Issue date: 12/10/2005
Interthane 990
P o l y u r e t h a n e
Further information regarding industry standards, terms and abbreviations used in this
data sheet can be found in the following sections of the International Protective Coatings
data manual:
• Definitions & Abbreviations
• Surface Preparation
• Paint Application
• Theoretical & Practical Coverage
• Interthane 990 Metallic Finish Working Procedures
Individual copies of these information sections are available upon request.
This product is intended for use only by professional applicators in industrial situations
in accordance with the advice given on this sheet, the Material Safety Data Sheet and the
container(s), and should not be used without reference to the Material Safety Data Sheet
(MSDS) which International Protective Coatings has provided to its customers.
All work involving the application and use of this product should be performed in
compliance with all relevant national Health, Safety & Environmental standards and
In the event welding or flame cutting is performed on metal coated with this product,
dust and fumes will be emitted which will require the use of appropriate personal
protective equipment and adequate local exhaust ventilation.
If in doubt regarding the suitability of use of this product, consult International
Protective Coatings for further advice.
Warning: Contains isocyanate. Wear air-fed hood for spray application.
Safety Precautions
Page No. 4

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