Fluorinated Polyurethane (FPU) LuxecolorŽ fluorinated polyurethane FC3100

Product Description

LuxecolorŽ fluorinated polyurethane FC3100 forms fluorinated polyurethane topcoat/sealer (dried film contains 28.5% fluorine). It is designed for weathering resistant and chemical resistant service. It is a 2K (two component: polyol and cross-linker), solvent borne system offering outstanding performance that no any other coating could be matched.

PERFORMANCE

During 15 years of extensive R&D of fluorinated polyurethane, product refinement and technical evaluation, the fluorinated polyurethane 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 Acid Salt Fog � passed 3000 hours no deterioration.

Chemical Resistance �Resistant to most 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 FC 3100 is can be applied as top coat, one coating system without primer, or topcoat on primer for metals. It is designed to be bonded to anodized metal with a minimum of 25 microns/1 mills DFT thickness. It also can bond to 2K epoxy polyamide primer or properly prepared surfaces excluding non-cross-linkable one component (1K) coatings or paints. For wood coating, apply after base coats fully dried (castor oil paints cross-linked by oxygen in air). For direct coating on porcelain surfaces, a surface etched with HF, ammonium fluoride or sodium fluoride is recommended for high strong bonding.

Fluorinated polyurethane FC 3100 coating can be brushed, sprayed, dipped or rolled on the substrates. For spray applications a static electric, or HVLP gun is recommended.  Fluorinated polyurethane FC 3100 polyol must be diluted with polyurethane grade acetone, MEK, MAK or other ketone or ester. Dilute with minimum 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.

PTFE, pigments, fumed silica particles can be mixed in fluorinated polyurethane FC 3100. The higher the contents of particles, the more viscous of the mixture will be. The higher content of PTFE provides higher solvent and chemical resistances. Fluorinated polyurethane FC 3100 with more than 30% of PTFE provides anti-fouling performance, dry film lubrication, and solvent resistances. Addition of fumed silica (Aerosil R972, R974, R805, R812) can improving scratch resistance. For change high gloss to matted surfaces, 5-15% of fumed silica must be added.

Nanoparticles of PTFE sprayed on semi-wet fluorinated polyurethane FC3100 coating create superhydrophobic surfaces. This superhydrophobic surface is transparent, and more durable than most superhydrophobic surfaces.

FORMULATING TIP

Polyol/Polyisocyanate Calculation:

Preparation of mix at stochiometric ratio: FC3100 fluorinated polyol has a hydroxyl value range of 44-46 on fluorinated polyol solids. Typical values for hydroxyl value and % solids are 45 and 33% respectively for fluorinated polyol FC3100. The Hydroxyl Equivalent Weight (HEW) for the 100% solid of fluorinated polyol:

HEW (100%)=(56110)/(OH Value)=56110/45=1247

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

HEW (33%)=1247/33%=3779 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 fluorinated polyol FC3100 at a 1:1 stochiometry, mixing 236 grams of N3390 with 3779 grams of fluorinated polyol FC3100.

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 3780 grams of fluorinated polyol FC 3100, or 10 gram N3390 with 150 grams of fluorinated polyol FC 3100.

Solvent Selection:

Solvent should be water free esters or water free ketones (urethane grade). 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 fluorinated polyol in can, Part B cross-linker (polyisocyanate) in plastic bottle. (If Part A contains pigments, prior to mixing, Part A component should be thoroughly stirred with a paddle). Measure A and B with weights or by volume. If measure Part A by a serving ladle (1/4 cup or 2 oz) and measure Part B with measuring glass. 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 3 to 5 minutes, and use the mixture ASAP.

Conventional solvent borne coating on markets contain 16% of solid. Spray guns are designed to fit with 16% solid paint bases. Fluorinated polyurethane FC3100 contains 33% of solids, therefore, you need add solvent to adjust viscosity for fitting spray gun system..Very important, for spray coating, each 8 oz Part A must add 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 polyol. 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.

Blow dried warm air will accelerate curing.

Immersion: for solvent resistant, it needs 7 days full cure, For water immersion application, it requires 24 hours medium curing time.

 COLOURS & FINISHES

Fluorinated polyurethane FC 3100 and cross-linker are water clear transparent, high gloss. White, Black, Red, and Blue are prepared by addition of pigments.

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 old or previously finished surfaces the degree of cleaning required prior to application is dependent 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 of primer applied as per the primer recoat instructions to ensure consistent minimum coverage is achieved. For navy ship salt corrosion protections, a top coat with fluorinated polyurethane should achieve a minimum of 50 microns/2 mills DFT or with a total wet fluorinated polyurethane thickness of 125 microns/5 mills.

COVERAGE

FC 3200 exhibits excellent coverage when applied.

Solids content: 33%

Number of coat: One only at 25-50 microns/1-2 mills DFT minimum

Coverage (theoretical) 68 m2/Gallon @ 25 microns DFT

732 sq ft per gallon @ 1 mil DFT

366 sq ft per gallon @ 2 mill DFT

Coverage (estimated) 51 m2/Gallon at 25 microns DFT (25% spray loss factor)

Coverage (estimated): 25.5 m2/Gallon at 50 microns DFT (25% spray loss factor)

550 sq ft per gallon @ 1 mil DFT

275 sq ft per gallon @ 2 mills DFT

STORAGE & HANDLING

Paint, Flammable Liquid, UN1263 Class 3, PG III

Shipping information: 3.80 Kg/ per Unit A in metal can and B fluorinated plastic bottles (0.45 kg).

VOC content; <258 grams per liter.

Flash point 27°C/81°F

Storage � fluorinated polyurethane Coatings 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 part has a minimum shelf life of 24 months from the date of manufacture if stored as indicated above, unopened in sealed containers. Cross-linker (Part B), however, only has 6 month self-life is packaged in fluorinated plastic bottles. If Cross-linker is packaged in metal container and unopened, it has 12 month shelf-life. Ensure both components of fluorinated polyol and cross-linker 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. It may irritate, if liquid material is contacted 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 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 filtrating off 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