Urachem 6.7

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GENERAL INFORMATION

PHYSICAL PROPERTIES

APPLICATION
Urachem 6.7 is a two-component polyurethane coating engineered for the electronic enclosure industry while meeting state and federal regulations for VOC emissions.

Urachem 6.7 is applied smooth or textured to a variety of substrates such as pretreated steel or aluminum as well as the many plastics used in the business machine, telecommunications and medical industries.

Urachem 6.7 when mixed per specification will not exceed 6.7 lbs VOC/gallon solids applied. Refer to mixing instructions found in the formula Technical Data Sheet (TDS) or on the paint container label to maintain VOC compliancy.

Urachem 6.7 is spray applied using conventional air pressurized or HVLP equipment. Urachem 6.7 is available in a variety of colors with gloss ranges from 50 to 700. Urachem 6.7 can be air-dried or forced dried with heat to accelerate cure times.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Physical properties and chemical tests were performed on iron phosphate CRS Q-panels. All samples were cured 72 hours @ 1400 F and then air-dried for 14 days at room temperature. Adhesion tests were performed on the appropriate substrates.
1. Recommended Usage:

Metal and plastic electronic enclosures for business machines, medical or office equipment. Ideal for large parts or per-assembled units that preclude the use of bake ovens; or where substrate type cannot tolerate high bake temperatures.

2. Applicable Substrates:

Steel and aluminum, either chemically pretreated. If chemical pretreatment is not possible then all substrates should be cleaned and primed with WB Wash Primer W6583. Most plastics used in the office equipment, telecommunications and medical industries; such as ABS (Kydex); polycarbonates (Lexan); PPO structural foam (Noryl); or polystyrenes (Styron). All plastics should be clean and free from mold release, grease and any other contaminates. Washing plastic substrates with IPA or VM&P is highly recommended.

3. Method of application:

Air atomized spray, either conventional or HVLP equipment is acceptable. Always consult with your technical representative if you have any questions regarding equipment

4. Solids by Volume:

As packaged: 60% - 65% per gallon

As applied: 52% - 54% per gallon

5. Weight per gallon:

As packaged 12- 15 lbs per gallon

6. VOC content:

As received: 2.6 ‚ 2.7 lbs per gallon

As applied: 3.1 ‚ 3.5 lbs per gallon

 
7. Solids by Weight:

As packaged: 75%-85%

As applied: 55% - 60%

8. Pencil hardness:

2H ‚ 3H

9. Adhesion Test, cross hatch:

5B

10. Taber Abrasion:

Less than 70 mg loss per 1000cycles per 1KG load with Cs-17 wheel

11. Flexibility:

1/8 inch mandrel, no cracking, no peeling

12. Impact, direct/indirect:

100 inch pounds/100 inch pounds

13. Solvent Resistance: 50 double rubs. No effect is defined as no permanent softening of film and/or permanent change in film appearance

a) IPA - no effect

b) Lacquer Thinner (T4-1) - no effect

c) MEK- no effect

14. Humidity resistance (100%): 300 hours exposure: no blisters, no corrosion

15. Salt Spray ASTM B117:

250 hours exposure: no blisters, no corrosion

16. Water Immersion:

7 days @ 1300F no effect

17. Chemical and Stain Resistance:

› hour exposure uncovered spot test. No effect as defined in #13:

a) 409 cleaner ‚ no effect

b) Fantastic cleaner ‚ no effect

c) Windex cleaner ‚ no effect

d) Household ammonia ‚ no effect

e) NaOH (10% solution) ‚ no effect

f) HCL (10% solution) ‚ no effect

g) Acetic acid (5% solution) ‚no effect

h) Mustard ‚ slight stain

i) Ketchup ‚ slight stain

j) Coffee ‚ no effect

 
Application Recommendations:

Use conventional air pressurized spray equipment; HVLP is acceptable.

Mixing:

Urachem 6.7 is a two-component polyurethane. Once admixed, the product must be used within 3 ‚ 4 hours. All ratios are by volume and the amounts of reducer specified per formula must be maintained in order to VOC compliancy as applied.

Ratio:

4 parts Urachem 6.7 paint:

1 part Urachem 6.7 Catalyst W5005

1 part Solvent Blend # 84 W7161

Base Coat:

Apply smooth wet coat, approximately 3.0 ‚ 4.0 mils wet. Allow 15 ‚ 20 minutes flash off prior to applying texture coat (or force drying if smooth coat is desired)

Texture Coat:

Used same admixed material for texture coat. Adjust air pressure and fluid delivery according to texture patterned desired. Apply over base coat. Allow 15 ‚ 20 minutes flash off before force drying.

Dry Times:

Flash off: 15 ‚ 20 minutes

Dry to handle: 20 minutes @ 1500F or 12 hours at room temperature (700F)

Dry to package or perform secondary operations: 30 ‚ 40 minutes @ 1500F - 1800F or 24 hours at room temperature (700F). ALWAYS ALLOW PARTS TO COOL. NEVER WRAP PARTS IN PLASTIC OR USE PLASTIC BAGS.

Clean-up:

Use 928 Washing Thinner or Urachem Reducers to clean equipment. ALWAYS CLEAN EQUIPMENT SAME DAY.

 

 

 

 

Copyright (C) 2006 Eastern Chem-Lac
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