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Flame-retardant adhesive for power packs in marine applications

News International-French

25 Feb 2011

Bonding technologies are now widely used in all types of industries. Adhesive innovation is focusing not only on improving mechanical properties, but also on integrating additional functions like flame retardancy.

LAURENT CHOUVET TECHNICAL SUPPORT ADHESIVES, COMPOSITES AND TOOLING HUNTSMAN ADVANCED MATERIALS
(Published on August-September 2010 - JEC Magazine #59)

 

CIn 2009, Huntsman Advanced Materials used its extensive knowledge in formulating self-extinguishing materials to develop and launch its Araldite 2033.

 

The properties of this two-component structural epoxy adhesive include flame retardancy, low smoke density and low toxic emissions, and are in compliance with the requirements for the UL94 V-0 flammability classification.

 

Due to its combination of good mechanical performance and self-extinguishing properties, Araldite 2033 was selected as the adhesive used to bond and stabilize the components in power packs for marine applications.

 

 

During the manufacturing process, the electronic components are assembled on a printed board. The adhesive bonds the components to the board and also acts as a damping material to prevent soldering material fatigue. The assembly needs to resist vibration and temperatures ranging from -10°C up to 100°C.

 

Product data
Property Component A
(resin)
Component B
(hardener)
Mixed
adhesive
Colour (visual) Black White Dark grey
Specific gravity 1.4 1.2 1.3
Viscosity at
25°C (Pa.s)
Thixotropic
paste
Thixotropic
paste
Thixotropic
paste
Pot life (100
gm at 25°C)
- - 120 -
140 minutes
Work time in
static mixer
- - ca.
120 minutes

 

For these marine applications, the adhesive needs to combine high toughness, good temperature resistance and excellent durability.

 

More Information
Araldite 2033 is a cold-curing, self-extinguishing epoxy adhesive consisting of a black resin and a white hardener. This rigid adhesive is suitable for structural applications, providing high strengths on metals. The Araldite 2033 is classified UL94 V-0, classified I2 and F2 according to the French Railway norms NF F 16-101/102 and classified HL1 according to the new European Railway norm PrCEN/TS 45545-2 category R23