GENERAL INFORMATION

PHYSICAL PROPERTIES

APPLICATION

Urachem-T is a two-component polyurethane enamel suitable for use on a variety of substrates that require superior appearance and durability.  Urachem-T will resist chemical or solvent exposure without film degradation.  Urachem-T is recommended for both metal and plastic substrates used in the electronic enclosure, medical and office equipment manufacturing industries.  Parts which are pre-assembled, too large for baking ovens, or substrates that cannot tolerate high baking temperatures are suitable candidates for Urachem-T which will cure at ambient room temperature or by force drying 20 - 30 minutes @ 125⁰ F - 180⁰ F.

Urachem-T can be applied directly to chemically pretreated steel and aluminum substrates.  Wash Primer 2035-534 or Tu-Com Chromate Primer R1953 must be applied if no chemical pretreatment is available.  Structural plastics such as ABS(CYCOLAC^TM), Polycarbonate(LEXAN^TM), and PPO(NORYL^TM) that have been injected, foamed or thermo-formed should be clean and free from mold release.  Wash with isopropyl alcohol or other mild wash solution.

Urachem-T can be textured or applied as a smooth coat.  Urachem-T is custom-color matched and formulated to your specifications.  When catalyzed with R1100 Exterior Catalyst, Urachem-T is an excellent coating for exterior use due to its exceptional resistance to weathering, superior adhesion, gloss retention, non-marring properties and flexibility.  Please notify Eastern Chem-Lac if exterior exposure is expected when ordering.

Physical and chemical tests were performed on ³Q-panel R46-I² iron phosphate, steel panel.  All panels were cured 72 hrs. at 140¹F. and then air-dried for 14 days.  Adhesion tests were performed on the appropriate substrates.

1.     Solids By Volume: 30 % - 35%

2.     Weight Per Gallon:  9.0 - 10 lbs/gal

3.     V.O.C. as Applied(6:1:3): 5.5 lbs/gal

4.     Pencil Hardness: 2H

5.     Cross Hatch Adhesion: 5B

6.     Taber Abrasion: Less than 100 mg loss 1000 cycles / 1000 gm load / CS 10 wheel

7.     Flexibility: 1/8² Mandrel ­ pass

8.     Impact, Direct: 100 inch lbs

9.     Impact, Indirect: 80 inch lbs

10.   Humidity (100%): 500 hrs - no blistering

11.   Salt Spray (5%): 500 hrs - no blistering

12.   Solvent Resistance: 50 double rubs -

³No effect² is defined as no permanent softening of film and/or permanent change in appearance

Isopropyl Alcohol: No Effect

Lacquer Thinner (T4-1): No Effect

MEK: No Effect

Skydrol: No effect

13.   Chemical/Stain Resistance: 30 minutes uncovered exposure spot test

409 cleaner - no effect

Fantastic - no effect

Household Ammonia - no effect

10% Na OH - no effect

Hospital Antiseptic Cleaners - no effect

10% HCL Acid - slight stain

5% Acetic Acid - slight stain

Ketchup - slight stain

Mustard - slight stain

Coffee - no effect

Windex - no effect

Use conventional air pressurized spray equipment; HVLP is also acceptable.

MIXING:  Urachem-T is a two-component polyurethane.  All ratios are measured by volume.  Urachem Catalyst R500 is recommended for interior use only.  Use admixed paint within 4 hours.  Use Urachem Exterior Catalyst R1100 for exterior exposure (Note ratio change when using Urachem Exterior Catalyst R1100).  Please notify Eastern Chem-Lac when exterior conditions will be encountered.

MIX RATIO:

Interior applications -

6 parts Urachem-T paint: 1 part Urachem Catalyst R500: 3 parts W283 Reducer

Exterior applications-

4 parts Urachem-T paint: 1 part Urachem Exterior Catalyst R1100: 2 parts W283

BASE COAT: Apply smooth wet coat approximately 3.0 mils wet allow 15-20 minutes flash-off prior to texture coat or force drying.

TEXTURE COAT: Use same admixed paint for texture, adjust pressures accordingly to match texture pattern.  Allow 15-20 minutes flash-off before force dry.

PRESSURE:

Base Coat - Fluid pressure 8-15 PSI

                    Atomizing pressure 45-55 PSI

Text.  Coat - Fluid pressure 8-15 PSI

                     Atomizing pressure 10-20 PSI

Pressures will vary according to spray equipment and part configuration.

DRYING TIMES:

Flash-off prior to texture coat or force-dry: 15-20 minutes @ 150⁰ F

Dry to handle: Overnight or 20 minutes @ 150⁰ F - 180⁰ F

Dry to package or secondary operations: Overnight or 40 minutes @ 150⁰ F - always allow parts to cool prior to secondary processing

Do not pack in plastic bags

CLEAN-UP: Use lacquer thinner or #928 Washing Thinner