Fluorinated Polyurethane (FPU) LuxecolorŽ AS-FC4100

Product Description

LuxecolorŽ AS-FC4100 forms highly fluorinated polyurethane Topcoat/Sealer/Adhesive (dried film contains 50% fluorine). It is designed to form solvent and chemical resistant service. It is a 2K (two component: polyol and cross-linker), solvent borne system offering outstanding performance. It has successfully applied as coating, adhesive (permanent),and sealer (permanent). It can be applied on solid and flexible substrates. The cured surfaces are highly solvent and chemical resistant under ambient temperature and with low friction low wear. Main applications are top coatings for the storage tanks and pipe lines for oil, gas, chemical industries. 

PERFORMANCE

During 15 years of extensive R&D, product refinement and technical evaluation, the FPU polymers have produced the following test results:

Xenon Arc Accelerated Weathering Tests � ASTM D4587, ASTM D4799, ASTM D6695, ISO 11341, MIL-STD 810F
� 11,000 hours with 90% gloss retention

Corrosion resistance � ASTM B117 Salt Fog � 8000 hours � passed no deterioration, undercutting or pin-holing.

Acid corrosion resistance � ASTM B287-62 Acidulated Salt Fog � passed 1500 hours no deterioration.

Chemical Resistance �Resistant to most solvents and chemicals.

Impact Resistance � ASTM D2794 Test � passed no cracks or loss of substrate adhesion.

Resistance to Hot Condensate � US Navy DTNSMDC/SME-85/23 Hot water immersion test passed.

Resistance to Petroleum Product Exposure � NRL Fuel Storage lining test passed.

Military Approvals � Passed and exceeded all US Navy industrial coating specifications.

NRL & Naval Ships Development Centre � Retention of protective qualities in maritime conditions passed & exceeded requirements.

Naval Air Systems Command � MIL C-81773A/AS � All tests passed..

APPLICATION

Fluorinated polyurethane AS-FC 4100 is applied as one coating system or two primer/top coat system. It is designed to be bonded to anodized metal, 2K polyurethane, 2K polyurea micron-foam with a minimum of 50 microns/2 mills DFT thickness. It also can bond to 2K epoxy, polyamide primer or properly prepared surfaces excluding one component (1K) coatings or paints. It also directly bonds on porcelain surfaces (HF, ammonium fluoride or sodium fluoride surface etching is recommended).

Fluorinated polyurethane AS-FC4100 coating can be sprayed, brushed, dipped or rolled on the substrates. For spray applications a static electric, or HVLP gun is recommended. Fluorinated AS-FC4100 polyol must be diluted with polyurethane grade acetone, MEK, MAK or other ketone or ester. Dilute with minimal solvent to achieve the desired wet thickness and low VOC. For optimum application properties, the temperature of the material should be between 10 and 25°C/(50 and 80°F) prior to mixing and application.

Nanoparticles of PTFE spraying on semi-wet fluorinated polyurethane AS-FC4100 coating create superhydrophobic surfaces. This superhydrophobic surface is not transparent however. It forms durable than most superhydrophobic surfaces.

FORMULATING TIP

Polyol/Polyisocyanate Calculation:

Preparation of mix at stochiometric ratio: fluorinated polyurethane AS-FC4100 fluorinated polyol has a hydroxyl value range of 23-24 on polyol solids. Typical values for hydroxyl value and % solids are 23 and 33% respectively for fluorinated polyurethane AS-FC4100 fluorinated polyol. The Hydroxyl Equivalent Weight (HEW) for the 100% solid of polyol:

HEW (100%)=(56110)/(OH Value)=56110/23=2440

To determine the HEW of the polyol as supplied, divide the above number by the % solid:

HEW (33%)=2440/33%=7394 as supplied

If reacting with aliphatic polyisocyanate, one needs to know its % NCO. The typical % NCO for Desmodur N3390 BA is 17.8%. The Equivalent Weight for this polyisocyanate is:

EW=42.02/(% NCO)=42.02/17.8%=236

Therefore, to react Desmodur N3390 BA with AS-FC 4100 at a 1:1 stochiometry, mixing 236 grams of N3390 with 7394 grams of fluorinated AS-FC4100 polyol.

NCO/OH indexing:

Due to the moisture in solvent, container, surfaces and in environmental, the NCO/OH indexing should be greater than 1:1. A typical value is 1.05-1.10. If indexing 1.08 is used, one should mixing 255 grams of N3390 with 7400 grams of AS-FC 4100.       

Solvent Selection:

Solvent should be water free esters or ketones (urethane grede). Water free xylene can be used, but it is health hazardous (cancer). Alcohol and glycol ether cannot be used. Acetone should be added in to avoid blocking of spray gun passage. Acetone is recommended for cleaning spray and blush after work done due to its very minor health effect.    

MIXING

This two component coating system is supplied in two separate containers: Part A polyol in can, Part B (polyisocyanate) in plastic bottle. Prior to mixing, Part A component should be thoroughly stirred with a paddle. Thereafter, measure Part A by weight and measure Part B with measuring glass (d=1.13g/cm3). Add Part B to Part A, and mix the A and B thoroughly in a mixing bottle by shacking or in a can with a broad paddle for approximately 2 to 3 minutes, and use the mixture ASAP. Solvent dilution can be done after the add Part B into Part A, or pre-weight Part A, and add measured volume of solvent into Part A, and then mixing all components together.

For spray coating, after dilution with a solvent, each 8 oz Part A must add at least 4-8 ml of acetone, to avoid block in the passage of a spray gun. Acetone will delay the cross-linker process. Once the most of acetone is evaporated the cross-linking process is accelerated. For reducing viscosity, use only polyurethane grade solvents including acetone.

Catalysts have been pre-mixed in part A. There is no need of add any catalyst.

POT LIFE

3 Hours @ 21°C/70°F.

1˝ Hours @ 32°C/90°F. However these times may vary with climatic conditions.

This material and its components are moisture sensitive. Any introduction of moisture or water into the material prior to or during mixing or application should be avoided. The product should be kept covered at all times after mixing and during application to prevent contamination and limit moisture absorption.

CURING

Dry time at 20°C/70°F ambient air cure.

Tack free: 4-6 Hours.

Hard cure: 24 Hours.

Full cure: 3-5 Days. Full chemical and solvent resistant properties depend on the completion of solvent evaporation out the coating layer. For thick coating it will take long time, since solvent evaporate from high fluorine coating is very slow processes. Therefore, only thin coating is recommended or layer after layer coating process will provide fast completion of thick coating.

Blow dried warm air will accelerate curing.

Immersion: ideally after 7 days, but not before 72 hours after application.

 COLORS & FINISHES

White, Black, Red, and Blue are available

 SURFACE PREPARATION

Good surface preparation and cleaning of the substrate is essential to the performance of this coating system. Ensure that all surfaces to be coated are dry, clean and free of all contaminants.

For primer two coating process, when an old or previously finished surfaces are involved, the degree of cleaning process prior to application must be determined upon the condition of the substrate. However on steel substrates a class SA 2.5 / SP6 to SP10 blast (near white metal), with a maximum surface profile of 62.5 microns/2.5 mills should be achieved. After cleaning apply one coat of Epoxy Polyamide Primer over welds, corners and crevices. If desired, apply a full coat of primer over entire area to 75 microns/3 mills DFT. Apply primer to all areas as soon as possible after blasting, but no longer than 8 hours. Check dry film thickness, as all areas must have a minimum coating of 75 microns/3mills DFT of primer. Areas with less than 75 microns/3 mills DFT of primer must have an additional coat to ensure consistent minimum coverage is achieved. Top coat with FPU should achieve a minimum of 50 microns/2 mills DFT of polyurethane fluorinated urethane AS-FC 4100 and a minimum total system thickness of 125 microns/5 mills DFT.

COVERAGE

Fluorinated fluoropolymer AS-FC 5100 exhibits excellent coverage when spray applied.

Solids content: 53.7%

Number of coat: One only at 50 microns/2 mills DFT minimum

Coverage (theoretical): 35 m2/Lt @ 25 microns DFT

1200 sq ft per gallon @ 1 mill DFT

STORAGE & HANDLING

Hazmat; Paint, Flammable Liquid, UN1263 Class 3, PG III

Shipping information:

Fluorinated polyurethane package: Fluorinated polyol: 4.0 Kg/ per Unit A in metal can and cross-linker B 200 g in fluorinated plastic bottles.
Other package: Fluorinated polyol: 20 Kg/container,  4Kg/container cross-linker.
VOC content; <120 grams per liter.

Flash point 27°C/81°F

Storage: Fluorinated Polyurethane: Fluorinated polyol part A or cross-linker part B must be stored and handled in compliance with all current local regulations applying to flammable liquids. Store in cool, dry, protected storage, well ventilated, between 5°-35°C/40°-95°F and out of direct sunlight, moisture or rain. Maintain unmixed material in sealed containers at all times.

Shelf Life: Fluorinated polyol has a minimum shelf life of 24 months from the date of manufacture if stored as indicated above, unopened in sealed containers. Cross-linker however, if packaged in fluorinated plastic bottle only have 6 month shelf life. It stored in steel container, it has 12 month shelf life if not opened. Ensure both components are consistent in appearance and thickness after stirring, and ensure that the cross-linker (Part B) is transparent in viscous liquid condition before mixing the components together.

 PRECAUTIONS

This material is for industrial use only, requires professional equipment and experience for safe handling and is not intended for use by the general public. Material Safety Data Sheets (MSDS) are published and available, and it is the responsibility of the applicator to be aware of the information contained therein.

This product is harmful if swallowed. May irritate if liquid material contact with eyes or skin. Keep away from heat, open flame and sparks. Use necessary safety equipment, including air fed respirators if spraying in a enclosed container, etc.

All handling of both parts of fluorinated polyurethane coating must be carried out under working conditions which prevent skin contact or inhalation of vapors. For example, wear gloves and goggles in a ventilated area or fitted with an effective filtered exhaust system, complying with all local regulations applicable to spray painting. The operator must wear a face respirator with active carbon filter for organic vapor filtration and gloves while spraying. The spray booth area should be isolated from other people while spraying is in progress and until all spray mist has been effectively dispersed. Do not just use dust respirators alone, must use face respirator with active carbon filter for protection from organic solvents.

Improper use and handling of this product can be hazardous to your health. Consult all regulations concerning occupational health and safety practices with regards to paint coatings. Appropriate safety equipment should be used and ventilation requirements must be carefully observed, especially in confined areas, to prevent the concentrated vapors. Please follow all directions and warnings completely and carefully otherwise do not use this product.

Fluonova Inc

1000 Cobb International Drive, NW, Suite D. Kennesaw, GA 30152

www.fluonova.com