450 High Performance Polyurethane Coating

Application Instruction

•  Glossary, attractive topcoat

•  Outstanding weather resistance with excellent colour and gloss retention

•  Resistant to board range of corrosive atmospheres

•  Resists soil pickup easily cleanable

•  Cures through with temperatures range

•  Hard, tough, flexible and abrasion resistant

Typical Uses

As a finish coat where attractive appearance and a wide range of corrosive resistance is required chemical plants, pulp and paper mills, offshore platforms, petroleum refineries, containers

For complete information on surface preparation, environmental conditions, application, and safety precautions, see this product's application instructions. Like all high performance coatings, Khemix 450 must be applied as recommended to obtain the maximum performance

Application Data Summary

Surface preparation-Refer to application instructions for primer and intermediate coats

Equipment- Standard industrial spray equipment, either conventional or airless

Chemical Resistance Guide

(when applied over suitable primer or intermediate coat):

Environment	Splash and Spillage	Fumes and Weathering
Acidic	Very good	Excellent
Alkaline	Very good	Excellent
Solvents	Good	Excellent
Salt Solutions
Acidic	Excellent	Excellent
Neutral	Excellent	Excellent
Alkaline	Excellent	Excellent
Water	Excellent	Excellent

This table is only a guide

Physical Data

Finish…………………………………………………………. Glossy

Colour………………………………………………………….See colour red

Surface…………………………………………………………Concrete or primer steel

Components…………………………………………………...2

Curing…………………………………………………………Solvent release and chemical reaction between components

Volume Solids…………………………………………………50% ± 3 (ASTM D2697)

Dry film thickness (per coat)………………………………….2 mils (50 microns)

Coats…………………………………………………………..1or 2

Calculated Coverage at 2 mils ( 50 µ )……………………….401 sq ft/gal (10.0 sq m/ltr)

Allow for application losses and surfaces irregularities

Application……………………………………..………….Airless or conventional spray

Pot life……………………………………………………..16 hrs @ 77º F (25º C)

Drying time (ASTM D 1640)

To Touch………………………………………………….=> 2 hours @ 77º F(25º C)

Dry through……………………………………………….=> 8 hours @ 77º F(25º C)

Recoat-min………………………………………………..=>4 hours

Recoat-max……………………………………………….=> Indefinite

Pot life and drying time are dependent on temperature

Mixing ratio (by volume)…………………………………7 part component A to 1 part components B

Temperature Limit

Continuous……………………………………………….200ºF(93ºC)dry

Intermittent……………………………………………….250ºF(121ºC)dry

Application temperature……………………………….…200ºF(93ºC)dry

Flash point(closed up)

Resin……………………………………………………...74ºF(23ºC)

Application Procedure

PRIMERS: apply over Khemix organic primer or builcoat. Surface coating prior to applying Khemix 450 must be free of dust, contamination, grease and oil etc. Spot rust must be touch-up accordingly.

Application Equipment

The following is a guide ; suitable equipment from other manufacturers may be used. Changes in pressure and tip size may be needed for proper spray characteristics.

Airless Spray-standard equipment such as Graco deVilbiss, Mordsen-Bede, Speeflo, or others having a 28:1 or higher pump ratio and a fluid tip with a 0.017-0.021 thou fluid tip.

Conventional Spray-industrial equipment such as Devilbiss MBC or OGA spray gun. Separate air and fluid pressure regulators,mechanical pot agitator and a moisture and oil trap in main air supply line are recommended.

Application Procedure

Khemix 450 is two components packaged in the proper proportions which must be mixed together before use.

•  Flush equipment with thinner before use.

•  Stir each component thoroughly, then add cure to resin and mix until uniformly blended to aworkable consistency. Do not mix more material than will be used 20 hours at 65-70º F(18-21º C). Pot life is shorten by higher temperatures.

•  Thinning normally not required, if thinning necessary for workability, add Khemix 065 up to 1 pint (approximately 10%) per gallon of Khemix 450.

•  Apply a heavy, wet coat in even, parallel passes overlapping each pass 50% to avoid bare areas, pinholes or holidays.

•  Double coat all welds, rough spots, sharp edges and corners, rivets, bolts, etc.

•  Application at 4 to 4.5 mils ( 100 to 112 microns ) wet film thickness will normally provide 2 to 2.5 mils (50 to 55 microns)dry films.

•  Check thickness of dry coating with a nondestructive dry film thickness gauge such as a mikrotest or Elcometer. If less than specified thickness, apply additional materials as needed.

Improper use and handling of this product can be hazardous to health and cause fire or explosion. Safety precautions with application instructions must be strictly followed during storage, handling, application and drying periods.

•  Numerial values are subject to normal manufacturing tolerances, colours and testing variances.

•  Allow for application losses and surfaces irregularities.

•  When applying by conventional spray, use adequate air pressure and volume to ensure proper automization.

•  Apply a wet coat in even, parallel passes, overlap 50% to avoid holidays, bare areas and pinholes. If required, cross spray at right angles to first pass.

•  Clean all equipment with Khemix 012 immediately after use.

•  Keep cure container tightly closed since repeated exposure to moisture will cause gellation. Moisture contaminated material is also subject to gassing on storage. Handle bulged containers with caution;lids may eject forcibly.

•  If a second coat of Khemix 450 is required, 8 hours is the minimum recoat time at 70º F (21 º C)

Note – When applying Khemix 450 by brush or roller, it may essential to add 300ml.

Warranty

Khemix products are warranted to be free of defects in material or workmanship. If a product does not conform with this warranty. Buyer must be notify Khemix within five days of discovery of this defect, but in no event later than one year after delivery date or after expiration of the applicable shelf life, whichever is shorter. Khemix sole obligation under this Warranty shall be at its options, to credit Buyer's account, or to supply replacement material or repair. Failure to notify Khemix of nonconforming goods under this Warranty, within the time specified above shall bar buyer from recovery hereunder.

It is expressly understood that Khemix makes no other warranties concerning the goods, and the sole remedy of the buyer and the sole liability of Khemix for product defect shall be as set forth above. No other warranties, express or implied, whether of merchantability or of fitness for any particular use shall apply. Khemix shall not be responsible for consequential damages.

Any recommendation or suggestion relating to the use of the products made by Khemix either in technical literature or in response to specific inquiry is given in good faith, but it is for Buyer to satisfy itself of the suitability of the goods for its own particular purpose and it will be deemed to have done so.