Anuprime - 291
Vinyl Wash / Etch Primer
Product Description
Anuprime - 291 Wash
Primer is two-component self-etch primer suitable for use on non-ferrous
metals to provide excellent inter-coat adhesion between the substrate and the
top-coats since adhesion of coatings is poor on galvanized iron, aluminium,
zinc, light alloys etc. The triple action of this coating of phosphating,
passivating and sealing explains excellent results achieved in protecting the
surface and preparing it for further coating. It can also replace the difficult
phosphating pre-treatment of metal used in shipbuilding. It is also known as
etch primer, metal conditioner primer, pre-treatment primer and holding primer.
Features and Benefits
Can
be applied either by conventional or airless spray. Only small areas can be
brushed.
Can
tolerate surface moisture and damp when applied.
Ease
in handling and application.
Excellent
adhesive bond with minimum air-cure time which then allows immediate
application of the next coating.
Has
ideal touch-up capabilities, even in applications that require spot-welding.
Most
commonly used at the job-site as blast or holding primer.
Modifies
the metallic surface to produce a tightly adherent film composed of
chromates, phosphates or oxides.
Has
fast dry and re-coat times.
While
inferior surface preparation can never be recommended, ANUPRIME-291 WASH
PRIMER can tolerate adverse conditions of surface preparation and
applications with shorter life and can directly be applied over tightly
adherent mill scale and even over small amount of rust.
Can
be top-coated successfully with variety of topcoats such as alkyd, epoxy,
polyurethane, vinyl, chlorinated rubber etc.
Can
also be used to seal the rough open surfaces of zinc-rich primers before
additional topcoats are applied.
Protects
a metal surface temporarily from contamination that could lead to unwanted
corrosion products.
Surface Preparation:
Steel:
The surface should be blast
cleaned to SSPC-SP10-63T or NACE No.2 i.e. loose rust and scales, dirt, grease,
oil, paint, wax, weak oxide films and other contaminants should be removed.
Blast cleaning to SSPC-SP-5-63 or NACE No.1 is recommended where heavy corrosive
conditions exist. That means a surface with a grey white, uniform metallic
color, slightly roughened to form a suitable anchor pattern for coatings. The
surface is free of all oil, grease, dirt, mill scale, rust, corrosion products,
oxides, paint and other foreign matter. In absence of blast cleaning, prepare
the metal surfaces by removing loose mill scale, rust and loose paint by wire
brushing, sanding, scrapping or chipping by hand or power tools.
Zinc, Aluminium,
Galvanized Iron:
Remove all oil, grease, dirt,
old paint, oxides and other foreign matter by wiping, etching or scrubbing with
brushes. Degrease the surface with the degreasing solvents like xylene or tri-chloroethylene.
Application:
Do not apply wash primer at a
heavier film than 8 microns. Otherwise, lack of adhesion in the coating system
may result. Anuprime - 291 dries rapidly after application. It can be
re-coated after 30 minutes and the maximum re-coating interval should not exceed
6 hours. If the maximum re-coat time exceeds, it must be re-primed. Mix Base and
Accelerator in equal parts by volume and stir thoroughly for 4-5 minutes. The
pot life is 4 hours only. After this time, the mixture may appear usable, but it
will not provide satisfactory adhesion.
Anuprime - 291
Wash Primer can be top-coated with alkyd, chlorinated rubber, vinyl, epoxy,
polyurethane and acrylic latex coatings. It is recommended that topcoats of
acrylic modified nitro-cellulose lacquers shall first be tested for adhesion in
small area.
TECHNICAL DATA
Name/Description |
Anuprime - 291 |
Type |
Two pack cold cured |
Composition |
Polyvinyl Butryal Resin / Rust inhibitive pigments. |
Colour |
Yellow |
Finish |
Matt - Semi Transparent |
Volume Solids (mixed) |
9.25± 1% |
Mixing Ratio |
Base : Hardener 1 : 1 by volume |
Pot Life @ 50% R. H. @ 30° C |
4 hours |
Dry film thickness per coat |
8 microns |
Coverage-(theoretical-no loss) |
11.5 m² /litre |
Dry heat resistance |
65° C |
Serviceability @ 30° C - Dry to touch - Re-coat - Maximum Re-coat time |
5 - 10 minutes 30 minutes 6 hours |
Application Temperature -minimum -maximum |
10°
C 35° C |
Relative Humidity |
85% |
Flash Point |
21° C |
Solvent/Thinner |
Anusol - WPT Thinner |
Precaution |
Flammable. Keep away from heat and open flame. Maintain good ventilation and avoid breathing vapours. |
Packing |
8 & 40 litres |
Shelf Life |
6 months |
Notes
Brushes and spray equipment should be cleaned with Anusol - WPT
Thinner. Otherwise, the equipments may render unserviceable.
The contents should be stirred thoroughly prior to use.
When over-coating the weathered or aged Anuprime - 291, ensure
that the coating is fully free from all contamination such as oil, dust, grease,
stains etc.
This coating should always be thinned with Anusol - WPT Thinner.
The use of alternative thinners can severely inhibit the curing mechanism of the
coating.
Disclaimer:
Information provided herein
is based upon tests believed to be reliable. It does not guarantee the results
to be obtained. Nor does it make any express and implied warranty or
merchantability, or fitness for a particular purpose concerning the effects or
results of such case. It does not release you from the obligation to test the
products supplied by us as to their suitability for the intended uses. The
application, surface preparation and use of the products are beyond our control
and, therefore, entirely your own responsibility.