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High elasticity and peel strength

Albiflex® products are extremely suitable to improve elasticity in electronic formulations. These base polymers combine the advantageous properties of epoxy resins and silicones - two polymer types that are normally incompatible. 

Product overview
Improvements to properties
How it works

Product overview [back]

Technical data (no specification)

Type Silicone content [wt%] Base resin EEW
[g/equiv] 		Dyn. viscosity, 25°C [mPa·s]
Albiflex® 296
40
DGEBA
850
45,000
Albiflex® 348
60
DGEBA
1150
30,000
Albiflex® XP 544
40
cycloaliphatic
750
30,000
Albiflex® 712
37
DGEBF / acrylate
--- 
200,000

Improvements to properties [back]

Albiflex® combines the normally incompatible polymer types “epoxy resin” and “silicone” into a unique copolymer, in which the advantageous properties of the two main polymers are united:

  • from epoxy resin, the tremendous peel strength on a large number of substrates, the high mechanical strength and the good chemical resistance
  • from silicone, the high elasticity, even at very low temperatures, the good thermal and aging resistance as well as the excellent dielectric properties
Albiflex® 296 represents the standard type with a silicone content of 40 %, while with Albiflex® 348 the silicone content has been increased to 60 % for particularly flexible formulations.

Albiflex® XP 544 is suitable for cationic UV-curing due to its cycloaliphatic base resin.

Albiflex® 712 is a product modification with acrylic end groups. This enables the product to be radically polymerized and is therefore particularly suitable for UV-applications.

Albiflex® has been developed as a base polymer for the formulation of elastic adhesive and sealing materials, encapsulations, coatings and similar products. Due to the high silicone content of the copolymers, miscibility with epoxy resins may be limited and should be tested in the final formulation.

How it works [back]

All Albiflex® products have a common chemical base structure, which can be represented as follows:

The basic principle is a linear block copolymer which consists of alternating blocks or segments of hard polyepoxides and soft polysiloxanes. Reactive epoxy blocks are located at both chain ends. Due to the morphology created by phase separation between the polysiloxane and polyepoxide segments, the property profile of the end product does not simply correspond to a plain mixture of epoxy and silicone properties. In general, the epoxy resin character predominates in the property profile.

For further details, please contact our application specialists.

 
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