PM-PU111 | Polyurethane Potting Material


Main features
  • Low shrinkage volume
  • High flowability
  • Void free casting

Product Description

LINQBOND PM-PU111 is a two-component low viscous elastomeric polyurethane material engineered for wide applications of potting and encapsulation. PM-PU111  is soft flexible, abrasion resistant offering excellent fast curing and low exothermic reaction.

With its excellent flowability during application and minimal bubble formation upon curing, LINQBONDTM PM-PU111 seamlessly integrates into your projects, ensuring a smooth and reliable finish. PM-PU111 is ideal for encapsulation of power cable joints, capacitors, and other electronic component potting.

 

Key Features

  • Low Density
  • Low Viscosity
  • Low shrinkage volum
  • Easy flowability
  • Fast curing and low exothermic reaction
  • No Air bubbles

 

Key Applications

  • Power cable joints
  • Filters
  • Capacitors
  • Automotive electronics
Product Family
PM-PU111  
Part A Part B
25kg - Pail 250kg - MS Barrel

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.
In stock In stock In stock
Packaging
TDS, SDS & Technical documents

Technical Specifications

General Properties
Chemistry Type Polyurethane
Mix Ratio
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
 100:20
Pot Life
Pot Life
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed.

It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
 0.5-1 hours
Electrical Properties
Dielectric Strength
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material.

Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property.

As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
 18-20 kV/mm
Volume Resistivity
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
 1.0x1014 Ohms⋅cm
Mechanical Properties
Hardness
Hardness
Hardness is a dimensionless quantity. There is no direct relationship between measurements in one scale and their equivalent in another scale or another hardness test.
Durometer (Shore A) 80-90
Elongation
Elongation
Elongation is the process of lengthening something.

It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.

It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
 20-40 %
Tensile Strength
Tensile Strength
The tensile strength of a material is the maximum amount of tensile stress that it can withstand while being stretched or pulled before failure.

Some materials break very sharply, without plastic deformation, in what is called a brittle failure. Others, which are more ductile, including most metals, experience some plastic deformation and possibly necking before fracture.
Tensile Strength
Tensile Strength
Tensile strength determines the resistance of a material to break under tension and it measures how much elongating load (or tensile stress) it can handle before fracture.

To make it simple, it measures how much force we have to apply when pulling apart a material before it breaks.
 3-4 MPa
Thermal Properties
Operating Temperature –30 to 130 °C
Curing Conditions
Curing Schedule
Curing Schedule
Curing schedule is the time and temperature required for a mixed material to fully cure. While this applies to materials that cure with heat, there are also other materials that can be cured with UV.

Even though some materials can cure on ambient temperatures, others will require elevated temperature conditions to properly cure.

There are various curing schedules depending on the material type and application. For heat curing, the most common ones are Snap cure, Low temperature cure, Step cure and Staged cure.

Recommended cure type, schedule, time and temperature can always be found on the Technical data sheets.
Cure Temperature 25 °C
Full Cure Time 96-120 hours

Additional Information

Cure Conditions

  • 4–6 hours at @25°Cthen 1 hour at 60–80 °C or
  • 4–5 days at @25°C

 

 

Processing Instructions

  1. Before mixing, stir both Part A and Part B to homogenize. 

  2. Mix components A and B according to the specified weight ratio. Stir thoroughly to ensure uniformity while preventing air from being introduced into the mixture. Ensure contamination is avoided. 

  3. To ensure complete mixing of both parts, machine mixing and dispensing are recommended. Static and dynamic mixer can also be used.

  4. Degas the mixture to remove the bubbles for about 10 minutes. Do not fill the container more than half full to prevent overflowing during degassing.

  5. Gradually pour the mixed compound into the device being potted. 

  6. Allow the potted workpiece cure at 30°C until the surface is dry. Full curing typically occurs within 24 hours. The curing process is influenced by temperature variations; generally, higher temperatures result in faster curing, while lower temperatures lead to slower curing. 

 

Precautions

  1. Use the mixture promptly after combining components A and B to prevent a significant increase in viscosity.

  2. If the components have been stored for an extended period and exhibit precipitation or stratification, they should be thoroughly mixed before use. 

 

Packaging

Part A is available in 25 kg open top plastic bucket. Part B is available in 250 kg metal barrels or 40 and 24 kg plastic cans.

 

Storage and Handling

Store in a ventilated, dry, and clean environment at 25°C–40°C Keep away from fire and heat sources. It is strictly forbidden to store in outdoor environments. At proper storage conditions, Part A has a shelf life of 6 months and Part B has a shelf life of 12 months. 



Please note that the provided information is based on available data and typical conditions. For specific applications and detailed test results, refer to the actual test data and conduct appropriate certifications