Quick Cure Varnish for Electric Motor Assemblies

Request Number REQ8351285
Due Date October 9, 2017
Author Kevin Andrews
Request for Proposal Details
RFP Title
Quick Cure Varnish for Electric Motor Assemblies
RFP Description

NineSigma, representing a global electric motor manufacturer, invites proposals for a quick-cure, solvent-resistant varnish for protecting motor assemblies.


NineSigma’s client currently uses a waterborne, low-solids varnish to protect motor assemblies that requires excessive time to cure sufficiently for parts to advance through a manufacturing process.  They seek to implement a much faster coating and the associated curing hardware.


NineSigma’s client is highly motivated to find a high-volume, in-line solution to reduce their cycle time and the “entrapped” work in process (WIP).  Ideally, they would replace their conventional “dunk, drain and bake” systems, significantly improving throughput and reducing energy consumption associated with this conventional process.    


Anticipated Project Phases or Project Plan

Phase 1 – Proof of concept on client-supplied parts

  • Evaluate curing time, bond strength, heat resistance, compatibility and overall coating performance on sub-components
  • Evaluate coating performance on a complete motor/stator assembly

Phase 2 – Engineering development

  • Evaluate coated part performance in actual applications
  • Develop small scale pilot scale coating application system for 100-1000 parts
  • Perform design and reliability test in actual applications
  • Supplier visit

Criteria for Moving from Phase 1 to Phase 2

Client will consider for advancement an approach that meets performance criteria with acceptable economics and pathway to commercialization.


Key Success Criteria

The successful technology will:

  • Create a film that:
    • Is electrically non-conductive
    • Adheres to steel, Mylar, and enamel-coated magnet wire (with an amide-imide top coat)
    • Resists degradation by solvents such as refrigerants (R-22 or 134A) and oils (yellow mineral and polyester oil)
    • Is not brittle; will not “flake off” when applied to magnet wire and annealed or bare lamination steel
    • Withstands temperatures ranging from −20 to +350 °F with minimal adhesion/strength loss
  • Ideally, cures to tack in 20-30 seconds and becomes durable for handling/packing within 10-20 minutes
    • After completely curing, applied coating film must:
      • Demonstrate < 1% soluble extractions when washed in a methanol or dichlorofluoroethane bath
      • Be stable for ≥ 20 years
  • Be suitable for application in manufacturing environment
    • Have acceptable, preferably continuous, throughput
    • Have a suitable process for initiating rapid cure
      • It is possible to rotate parts to improve line of site
    • Has acceptable environmental, health, and safety (EHS) profile
  • Produce a coating liquid that:
    • Has sufficiently low viscosity to penetrate voids between windings but enough viscosity to enable film build for protection (viscosity in ~50-100 cP range)
    • Enables tuning viscosity without adding VOC’s
    • Is shelf stable at ambient conditions (−20 to +40 °C)
    • Preferably, has zero volatile organic compounds (VOC’s)


Possible Approaches

Possible approaches might include, but are not limited to:
  • Electron-beam or UV light cured formulations
  • Thermal coating hybrid with other curing mechanism/s


Approaches not of interest

The following approaches are not of interest:

  • Bondable Wire
  • Conventional thermal cure varnish


Preferred Collaboration types
  • Contract Research
  • Technology Licensing
  • Supply Agreement
  • To Be Negotiated
Items to be submitted

To respond, please make sure you are registered in NineSights, as it will prompt you to log in. Then, use the Response options at the top or bottom of the page. You may submit supplemental files in addition to your completed response form.


Appropriate responses will use the response form and address the following:

  • Non-confidential description of proposed technology and curing mechanism
  • Availability of technical data including cure time, adhesion (cross-hatch tape peel test), flexibility (mandrel bend test), temperature and solvent resistance, and bond strength (Helical Coil Test-ASTM D2519 or similar)
  • Technical maturity of the approach (reduced to practice, prototype, ready to implement, commercialized)
  • Pathway to commercial scale including timing, estimated budget, and capacity for manufacture
  • Estimated unit cost of varnish to make 15-50 micron (~0.0005-0.002 in) film build (US$/100 in2)
  • Position on intellectual property including patent references
  • Desired relationship with sponsor
  • Team description and related experience


Other Request information includes:



Responses from companies (small to large), academic researchers, other research institutes, consultants, venture capitalists, entrepreneurs, or inventors are welcome. For example:


You represent a company or university that has formulations which can be tuned to meet this requirement.

You represent a company or university that has demonstrated a method ready for implementation at industrial scale.

You represent a technology transfer agency that represents an inventor or technology holder who can demonstrate an approach to address the request.

You represent a university research department that has a bench-scale demonstration ready to adapt.



Area of Interest
Request Priority
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