CS-25/CNT; Epoxide Functional Silicone Thermal Conductive Coatings

The CS-25/CNT (Carbon Nanotubes) is a coating system for HVAC/R coil and heat exchangers, based on a special heat conductive coating, achieving a long lasting performance. The CS-25/CNT can be applied before a machine is assembled and installed or even years after installation. The heat exchanging surface of thermo-conductive coatings determines the cooling capacity and consequently energy consumption. CS-25/CNT coating systems meet the requirements of energy conservation systems, by preventing the deterioration of the heat exchanging surface.

CNTs have the highest thermal conductivity (∼ 3000–3500Wm-1K-1 (experimental value)) with a low CTE (coefficient of thermal expansion (-2.5ppmK-1 at room temperature)). This makes this material an excellent filler candidate to manufacture conductive coatings with ultra-high thermal conductivity (K=400Wm-1K-1) in order to solve heat dissipation problems. However, harnessing the thermal conductivity potential of the CNTs within siloxane matrices has yet to be achieved.

The limited number of studies that have focused on the thermal conductivity of Siloxane coatings reinforced with CNTs clearly demonstrates the undeveloped state of these materials to harness the potential high thermal properties of the CNTs. A substantial volume of work is still needed to develop processing methods capable of overcoming the inherent challenges faced (i.e. introduction of the CNTs into the Si matrix, wettability of the nanotubes, dispersion, subsequent reaction products, alignment and structural damage) during Si/CNT processing. If these nanoparticles, with outstanding thermal properties can be harnessed to produce ultra-high thermal conductive (K=400Wm-1K-1) materials, they may be the solution to overcoming the limitations of important thermal management applications such as Siloxane Thermal Conductive Coatings.

Once the coating cures it will act as a thermal material by not only effectively absorbing radiant energy, but by conducting it away from the “hot zone” through parallel substrate conduction. CS-25/CNT coatings can reduce “hot spots” and, therefore, increase the overall thermal stability of a coating in an environment where radiation heat transfer is an issue.

CS-25/CNT provides chemical inertness, refractoriness, electrical conductivity, thermal conductivity and UV stability. These finishes are hard, tough, and have excellent abrasion, alkali, water and acid resistant, suitable to use for underwater application.

The most common substrates for CS-25/CNT coatings are: ferrous, nonferrous metal and plastic substrates.

Carbon Nanotubes Thermal Radiation Coating Features:

Carbon nanotubes (CNTs) are one of the best thermal conductivity materials known in the world today. CNTs are one-dimensional nanomaterials, large surface area, known as the world’s darkest material, the radiation coefficient close to 1. Nano-fibrous CNTs are compared to other particulate Thermal Radiation filler, CNTs thermal conductivity is easier to form a network, the toughening effect is obvious to coatings

Carbon Nanotubes Thermal Radiation Coating Properties:

  • Thin coating
  • Small thermal resistance
  • Can excite resonance effect metal radiator surface
  • Significantly improving the far-infrared emission efficiency
  • Accelerate quickly distribute heat from the coil/heat exchanger/radiator surface
  • Carbon Nanotubes Thermal Radiation Coatings can be applied to copper foil, aluminum plate, LED lamp base, electrical enclosure cooling etc.

Technical information

  • delivery form liquid
  • appearance black liquid
  • contain no solvent
  • SG: 1.0131 g/cm3
  • viscosity at 25 °C approx. 221 mPa s
  • EEW approx. 1183 g/eq

Suitability for

  • solvent borne
  • 2-pack
  • high solid 
  • CNTs pigmented coat

Application

  • Thermal Radiation coating systems for air condition, heat exchanger, radiator etc.

PROCESSING

  • CS-25/CNT with SH-122 are 2-pack system.
  • First pack contains CS-25/CNT,
  • Second pack contains SH-122,
  • Mixing ratio by volume:                CS-25/MWCNT  9 parts and

       SH-122                    1 part

  • Dry to touch is approx. 30-45 min @ 25°C.
  • Avoid thermal cure or accelerated curing conditions at high temperature.

STORAGE

Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

PACKAGING

48 lbs. pail

REGISTRATION STATUS

CS-25/CNT ingredients are listed in the following chemical inventories: ECL, EINECS, ENCS, NDSL, PICCS, TSCA.

All ingredients are listed on the TSCA inventory or comply with the TSCA Polymer Exemption criteria according 40 CFR 723.

SAFETY NOTES

Comprehensive instructions are given in the corresponding Safety Data Sheets. They are available on request from Biro Technologies Inc.As with any product, use of CS-25/CNT in a given ap­plication must be tested (including but not limited to field testing) in advance by the user to determine suitability.