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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Main Raw Material: Epoxy
  • Usage: Electrical Insulating Varnish
  • Application Method: immerse
  • State: Liquid Coating
  • Brand Name: Rota
  • Model Number: R-1140
  • color: clear

Packaging & Delivery

Packaging Details 17kg/drum or 180kg/drum with steel drums of 20L or 200L.
Delivery Time 10 days after deposit


Resin R-1140                        Thermal class H (180C)

Solventless                               UL approved E227128




Product Description

 R-1140 Fast cure solventless impregnating resin is made from heat resistant unsaturated polyester resin, epoxy resin and styrene. It has gained UL certification (E227128) and UL electrical insulation system certification (E242776)


fast curing, stable storage, high mechanical strength and excellent insulation performance


It is widely used and suitable for impregnation of many types of motors and apparatus coils of class B, F and H. It is recommended for Y2 series motors, water pump motor, traction motor, large transformer and dry type transformer. It can be used by common immersion, continuous immersion and VPI method of application.

Technical Data



   Standard Values



Brown-yellow liquid, uniform

without mechanical impurities

Viscosity, 23°C, Tu-4# cup



Gel time   130±2°C



Volatile matter in curing,

l0g specimen in aluminum

vessel of 45×45×25mm

130°C, 3 h


            ≤ 20

Stability of resin in an

open vessel 50±2°C, 96 h



of viscosity 

            ≤ 4

Curing in thick layer

130°C, 4h


Not worse than S1, U1, I4.2

Reaction of resin on

enamel wire


            ≥ 2H

Bond strength

Helical coil method

At room temperature



Dielectric strength

At room




Volume resistivity

At room



           ≥ 1×1012

After immersion

in water, 24h

           ≥ 1×1011

At 155±2°C

           ≥ 1×108

At 180±2°C

           ≥ 1×107



Packaging & Shipping

 17KG/drum or 180KG/drum.

This product can be stored at least 6 months in dry and ventilated room at about 25℃.



Company Information





Established in 1992, Rota Group is one of the most professional manufacturers of  impregnating varnish, mica tape, potting resin and embedding resin in China. Most products have been approved by ISO9001, 14000, UL, TUV, FDA, RoHS and REACH, widely used in high-voltage motors, wires and cables, household appliances, industrial pumps, and metallurgy equipments etc. We win the trust of the majority of well-known manufactures, like BOSCH, BLACK & DECKER, Fujitsu,  Shibaura, REGAL, Siemens, EPCOS, N.P.V. and so on.






 Professional quality, creating value for customers. Rota Group lead in the aspects of industry scale, product technology and innovation capacity, we will provide quality products and professional services for you. Welcome you!

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China (Mainland) | Manufacturer, Trading Company
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