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Product Info for UNITHANE IC-551 NF


UNITHANE IC-551 NF is an anionic NMP free and APEO free dispersion is designed for industrial coating applications requiring good gloss, flexibility and adhesion to a variety of substrates.

The performance of UNITHANE IC-551 NF can be further enhanced by blending with other Union polyurethane dispersions or by the use of external crosslinking like: polyfunctional aziridines, water dispersible isocyanates or polyfunctional carbodiimides.

Industrial Applications:

This product is recommended for: Graphic Arts, Flexible Substrates

Product Characteristics:

Product Class Solids % pH Viscosity @25ºC Gloss VOC g/L Tensile (D-882) Elongation (%) Modulus 100% (psi) Sward Hardness
31 – 33 8.0 – 10.0 10 – 300 cps. 80 – 100 101-102 3000 psi 400% 1030 psi 10

Full product details can be found in this section:


Special Features: NMP-Free (NF)
Application Types – Industrial Coatings: Interior, Synthetic Leather, Paint, Graphic Arts, OPV, Paper, Textiles, Plastics – Flexible, Plastics – Rigid, Adhesive/Primer, Heatseal


Total Solids %: 31 – 33
pH: 8.0 – 10.0
Viscosity @ 25⁰ C: 10 – 300 cps.
VOC (Grams/Liter): 101-102
VOC (% of total weight): 9.8-10.2
Specific Gravity: 1.04-1.06
Appearance: Semi-translucent
Gloss (60): 80 – 100
Freeze/Thaw Cycles (D-2243): 0
Shelf Life: Maximum 12 months
Harmonize Tariff Number: 3909.50.6000


Film Appearance after Curing: Clear
Tensile (D-882): 3000 psi
Tensile at 100% Elongation: 1030 psi
Elongation (D-882): 400%
Cold Crank (ISO 17233): below -30°C
Softening Point: 155°C
Pencil Hardness (D-3363): 4B
Sward Hardness (D-2134): 10
UV Resistance (D-4587): No Damage (1000 hours at 340 nm)
Impact Resistance (D-2794): No Damage at 160 psi (Direct or Reverse)
Tabor Abrasion (D-4060): 15 mg loss (CS-10, 1000g 1000 cycles)
Mandrel Bend (D-522): Pass 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 1
Dry Time (D-5895): 75 minutes
Hydrolysis Resistance (200 hours, 70ºC, 95% RH): Retained <50% of Tensile Properties


note: 5= no damage, films dried for 15 minutes at 80ºC, then equalized at room temp for 7 days.
Water: 5
Acetic Acid: 4
Ammonia: 1
Methyl Ethyl Ketone: 1
2-Propanol: 1
Toluene: 3
Gasoline: 5


Cold Roll Steel – Unpolished: 5B
Aluminum – Untreated: 5B
Brass – Untreated: 5B
ABS – Untreated: 5B
Polycarbonate – Untreated: 5B
Nylon – Untreated: 5B
HDPE – Untreated: 0B

Certified to ISO-9001:2015

Contact Information:

3 Malcolm Hoyt Drive
Newburyport, Massachusetts 01950 U.S.A.
Tel: (978) 465-1717 Fax: (978) 465-4194


The information and data contained herein are believed to be correct. However, we do not warrant either expressly or by implication the accuracy thereof.

[Please note that due to the Chinese Trademark Office opposition decision, products destined for the China marketplace in the category of “Adhesives for Industrial purposes: Polyurethane,” will NOT contain the trade name “UNITHANE” but will be labeled only with the letter or number designation. Please contact us if there are any questions. Thank you.]