FERMADUR

Two-component polyurethane potting compounds

Tailor-made chemistry for your electronic components.

FERMADUR® is the trade name for Sonderhoff’s two- component polyurethane systems for the manufacture of hard to gel-like potting compounds which are placed and cured directly onto or into the component using FIP (Formed-in-Place) technology. The systems consist of a resin basis (A-component) and a hardener (B-component) which are mixed together in a prescribed ratio, forming a bubble-free potting compound after only a few minutes. The function of the potting compound is determined by the application and uses range from surface coating to protect against environmental effects, to encapsulating electronic components or gluing components. The flowability, reactivity, hardness classification and colour of the components can be adjusted as required.

10 good reasons for using FERMADUR®:

  1. FERMADUR® systems are the most suitable for sealing industrial components
  2. After curing, FERMADUR® systems develop a crosslinked structure which is extremely resistant to environmental effects, such as humidity, dust, temperature and mechanical impacts
  3. FERMADUR® systems react at room temperature in 1 – 180 min and although a furnance can reduce the reaction time considerably, it is not a necessity
  4. FERMADUR® systems achieve particularly good adhesion to parts due to the chemical reaction of the two components on the carrier material
  5. FERMADUR® systems offer exceptional long-term behaviour and are distinguished by high heat resistance and an extremely low expansion coefficient
  6. The viscosity of FERMADUR® systems can be regulated from a thin fluid to a thick paste
  7. FERMADUR® systems are also available in transparent and light-fast formulations
  8. FERMADUR® systems have low shrinkage and low surface tension, very good dielectric properties and also very high impact strength
  9. Processing machines for FERMADUR® systems can be adapted flexibly and quickly to other components at any time
  10. By using FERMADUR® systems even small product series become profitable

Processing information

FERMADUR® systems are processed using 2-component mixing and dosing machines. The recommended processing temperature is 23 °C ± 5 °C at a relative humidity between 40 and 70 %. Most FERMADUR® components can be stored in the original packaging at a temperature between + 10 °C and + 40 °C for at least 6 months.

Physical and chemical properties

Properties

FERMADUR®

Appearance

black or grey, other colours upon request (including transparent)

Hardness

covering the entire Shore A range up to 80 Shore D also gel-like

Density

from 0.8 g/cm³ to 1.7 g/cm³

Reaction time

adjustable from 60 s to 180 min

Flame retardant

flame retardant up to UL-94 V-0 possible, even with 2 mm coating thickness

Other properties

e.g. transparent, light-fast, with good thermal conductivity, can be used for rotation moulding, dissipates static, hydrophobic, also available as a syntactic foam, with multilevel flow behaviour, treated with microbicide, abrasion resistant, greater adhesion


FERMADUR® A-component

Applications

Viscosity (A)
mPas

Hardness
Shore 00

Density
g/cm3

Other properties

A-610

Potting compound for sensitive electronic components, circuit boards and sensors

ca. 2.000

gel-like
A40

1,20

Consistency adjustable across the range of mixing ratios, soft and tear resistant

A-113

Potting compound for instrument and connector plugs

ca. 1.000

A45-A55

1,15

Flexible, levels very well, low shrinkage, low surface tension

A-606

Special potting compound for electronic components

ca. 1.200

A45-A60

1,20

Flexible, mechanically particularly stable, tensile strength approx. 7 Mpa, elongation at break approx. 350%

A-134

Potting compound for sensors, circuit boards, electric switches and sensor elements

ca. 1.800

A60-A75

1,35

Flexible standard systems for electronics in the automotive industry, listed in various OEMs, good adhesion

A-125

Potting compound for plugs

ca. 1.500

A65-A75

1,20

Flexible potting compound, low shrinkage, low surface tension

A-203

Potting compound for transistors

ca. 1.200

A60-A80

1,20

Flexible, for sensitive electronic applications, low shrinkage, low surface tension

A-680 UL2

Potting compound for sensors and circuit boards

ca. 7.000

A65-A80

1,60

Conforms to UL94 V-0 listing at 2 mm, elastic

A-690 UL1

UL94 listed potting compound for transducers

ca. 6.000

D80-D85

1,60

UL94 V-0 listing at 1.5 mm, hard, good thermal conductivity

A-117

Potting compound for transformers, voltage
transformers, capacitors, control units

ca. 23.000

D60-D90

1,70

Hard, thermal conductivity 0.9 W/mK, conforms to UL94 V-0 at 3 mm

A-111

Potting compound for sensors or circuit boards

ca. 300

gel-like
A60

1,25

Transparent, soft to gel-like, for sensitive electronic applications

A-180

Potting compound for light diodes

ca. 500

A60-A80

1,25

Transparent, UV stable, tough-hard, temperature stable up to 165°C, high chemical resistance

A-173

Potting compound for cable sheathing or moulded parts for cable routing

ca. 1.000

A50

0,80

Slightly foaming, flexible, high longitudinal water tightness achievable

A-120

Adhesive for panes in enclosures

ca. 200.000

D25-D40

1,30

Tough-hard, good adherence on various substrates, high mechanical stability, can be used as a glue, highly thixotropic

A-187

Rotation moulding compound for ferrules

ca. 120.000

D50-D65

0,70

Hard lightweight potting compound, syntactic foam with low density, non-drip

A-172-2-CON

Rotation moulding compound for ferrules

ca. 250.000

D80

1,40

Non-drip, high stability and chemical resistances, static dissipative potting compound

A-640

Coating for conveyor belts

ca. 23.000

A70-A80

1,25

Flexible, particularly tear resistant

A-196-4F

Potting compound for filter end caps and
adhesive for filter cartridges

ca. 1.200

D30-D40

1,20

Microbicide, tough-hard, good adherence to various substrates, two-step flow behaviour available

 

 

product brochure

Appliances

Potting of a transformer using FERMADUR®

Potting of a motor inductor using FERMADUR®

Potting of a relay using FERMADUR®

Potting of an automotive connector plug

Potting of an electronic component used to control a heating unit