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What does the IF-WS₂ stand for?

IF-WS₂ are Inorganic Fullerene-like particles of Tungsten Disulfide, WS₂. This material is widely used for decades by NASA, Pentagon, and private companies. Learn more about our unique Nanotechnology.

Read more about our company origins in Wikipedia

Are NIS products environmentally friendly?

Various tests (inhalation, skin sensitization, etc.) proved that IF-WS₂ particles are not classified as hazardous. For details, please refer to the current products SDS.

Do the particles cause skin irritation?

Sensitization test carried following OECD Guidelines for testing of chemicals stated that inorganic fullerene-like particles cause no reaction identified as sensitization.

What are the health hazards of nanoparticles?

The only way of using IF-WS₂ particles approved by NIS is in the form of a dispersion of particles in liquids. This way, the liquid minimizes the contact of particles with the environment. According to paragraph 2.9 of JRC113469, the dispersions of IF-WS₂ particles are not classified as nanomaterials. Learn more about our water-based solutions HERE.

Are there Aerospace applications for the NIS products?

IF-WS₂ particles are already used in the Israeli space program. NASA has used WS₂ for years.

What are the components of the current product formulation that are replaced by IF-WS₂?

IF-WS₂ formulations are designed to serve as a base for high-performance lubricants. The particles themselves are known to be compatible with most commercially available additives due to chemical and mechanical stability.

What are the similarities and differences between IF-WS₂ and 2H-MoS₂?

IF-WS₂ may be described as 2H-WS₂ closed caged into quasi-spherical particles or tubular structures. The fact may be evidenced by X-Ray powder diffractometry of pure phase materials produced by the NIS. Both MoS₂ and WS₂ have a unique layered structure different from other disulfides, where six sulfur atoms surround each metal atom at the apices of a trigonal prism. Watch this VIDEO for more info!

What is the percentage of NIS additives (treat rate) in fully formulated products?

The percentage of NIS’ s dispersion in fully formulated products ranges from 1% to 10% depending on the applications.  That said, the concentration of IF-WS₂ in finished lubricants may vary from 0.1% to 5%. This number is different for grease, coating, MWF.

What is the percentage of IF-WS₂ in NIS’s dispersions?

In most cases, the addition of up to 5% of IF-WS₂ Formulated Nanotech Industrial Solution will drastically improve lubricant’ Extreme Pressure (EP), anti-wear (AW), and anti-friction (AF) properties. However, for IF-WS₂ concentrates, this number could be up to 50%. Please note, the exact formulation is the company’s proprietary know-how. The disclosure of the recipe is subject to mutual NDA.

What is the shelf-life of NIS’s liquid products?

Nanotech Industrial Solutions does not recommend storage of products for periods exceeding:

  • 12-18 months for water-based products (the IW series)
  • 24 months for oil additives (the IC and AC series)
  • up to 36 months for grease additives (the EMX series)

The above timeframes do not release the customer from their obligation to carry out an inspection of the goods received and store the products following the SDS. Extending the storage is not covered by general conditions of sale and is performed at customers’ responsibility.

Do NIS’ water-base fluids freeze? If so, at what temperature and are they recoverable if frozen?

Our water-based fluids may freeze because there is a big portion of water in them. The freezing point of H₂O is zero degrees Celsius (0° C). It is recommended to stock the water-based fluids above 0° C. The issue of freezing may be solved by adding propylene glycol. For the possibility of recovering the frozen dispersion, please refer to the product’s SDS.

Is there a problem with the separation of the NIS additives?

IF-WS₂ Formulated products are highly stable solid dispersion within the recommended usage period. However, separation of solids may occur, and agitation before usage is recommended (as with any solids). Other reasons for a possible separation issue are natural gravity and a density gradient between liquid media and solid particles. It is suggested to stir the product prior to using it. Temporary separation should not affect products’ performance. Please also note that mixing NIS additives with media other than recommended by NIS may cause stability problems. Before using NIS additives, please check compatibility with your base products or consult the NIS representative.

What happens with the evaporation of water-based products?

In case the evaporation of water-based products occurs, the original concentration ratio may be resorted by adding water or water-based additives following the refractive index. In most cases, viscosity and stability will change, but product performance should not be affected.

Are the IF-WS₂ Formulated products compatible with silicone (greases)?

IF-WS₂ particles are known as stable and chemically inert, so we are not expecting compatibility issues. The compatibility will vary depending on the type of silicones. Please consult with the NIS R&D department. Additional testing may be required. Please also note that the presence of WS₂ in our formulations could darken the color of your base grease.

Can I add the IF-WS₂ dispersions directly to fully-formulated products?

The AC line of oil-based additives is designed as a top-up for diesel/gasoline engine oils. The IW-line of water-based products is intended to be used as a top-up for metalworking fluids. However, to avoid compatibility issues, we would strongly recommend consulting with our R&D department before adding IF-WS2 Formulated to your products.

When your product leaves an exfoliated film, can that film be washed off?

The “film” or “protective layer” is extremely thin. We are talking about Engstrom or nano-thick layers formed by a chemical reaction.

Could an exfoliated film cause paint adhesion problems?

Unlikely so. Adhesion could be affected by substrate surface chemistry and topology, binder chemistry and structure, and surfactants.

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