Knowde Enhanced TDS
Identification & Functionality
- CASE Ingredients Functions
- Technologies
- Product Families
Features & Benefits
- CASE Ingredients Features
- Industrial Additives Features
- Characteristics
- The specially designed block copolymer structure of ALBIFLEX® 246, made up of epoxy and silicone segments, provides an outstanding combination of properties.
- Much higher strength than 1 or 2 component silicone elastomers.
- Excellent adhesion on most substrates.
- Better thermal stability than polyurethane elastomers.
- Lower water vapor permeability than silicones.
- Hardness between Shore A 30 and D 80, depending on the curing agent used, with excellent elongation.
- Very low halogen content.
- Upon curing ALBIFLEX® 246 forms a segmented molecular structure consisting of soft polysiloxane and rigid polyepoxy segments.
- This type of molecular structure is found in many high-performance elastomers, i. e. in polyurethanes and many thermoplastic elastomers.
- The combination of polysiloxane and epoxy units in the polymer structure creates an elastomeric material combining the outstanding electrical and thermal properties of silicones with the high mechanical strength and the excellent adhesion of epoxy resins.
Applications & Uses
- Applications
- Typical Applications
- ALBIFLEX® 246 is particularly well suited for use in elastic bonding, jointing and sealing compounds in electrical/ electronic applications, for use as a binding agent in high-quality coating systems for printed circuit boards and as a base polymer for potting and casting compounds for electronic components.
- Along with excellent mechanical properties, ALBIFLEX® 246 provides outstanding compatibility with many resins and hardeners.
- Dosage
- ALBIFLEX® 246 can be cured with almost any epoxy resin curing agent including all kinds of aliphatic or cycloaliphatic amines and amides, acid anhydrides and catalytic curing agents (e.g. tertiary amines and boron tri-fluoride complexes).
- Elastomer products with high thermal stability, strength and elongation at break can be obtained by curing with cycloaliphatic amines, anhydrides, or DICY.
- ALBIFLEX® 246 can also be cured with resin/curing agent pre adducts or pre condensates or with mixed curing agent systems.
- ALBIFLEX® 246 shows only limited compatibility with aromatic amines. Suitable curing agents include precondensates, adduct and mixed curing agent systems.
- Curing agents should be avoided which show turbidity (i.e. increased turbidity as compared to ALBIFLEX®) upon mixing with ALBIFLEX® 246 as this is an indication of incompatibility.
- However, possible whitening during curing is not an indication of a problem but instead of the desired separation in soft and rigid phases.
- Unlike normal epoxy resins, ALBIFLEX® 246 does not necessarily have to be cured with the stoichiometric ratio of curing agent.
- ALBIFLEX® 246 can be formulated with other epoxy resins, reactive diluents, plasticizers, etc. for further modification of finished product properties.
- Since ALBIFLEX® 246 has only limited compatibility with aromatic epoxyresins (e.g. formulations based on Bisphenol A-F or novolac), for toughening ALBIFLEX 246 should be used in dosage levels 80% is required.
Properties
- Physical Form
- Appearance
- Yellowish, opaque liquid
- Technical Data
| Value | Units | Test Method / Conditions | |
| Density (at 20°C) | 1.00 - 1.10 | g/ml | — |
| Viscosity (at 25°C) | 27000 - 35000 | mPa·s | — |
| Epoxy Equivalent Weight | 1100 - 1300 | g/eq | — |
| Si/EP-Copolymer Content | 100 | % | — |
Regulatory & Compliance
- Chemical Inventories
Packaging & Availability
- Packaging Type
- Packaging
25 kg pail
Storage & Handling
- Shelf Life
- 6 months
- Storage Conditions
- 6 month if stored in the original unopened container.
- At a storage temperature of 2 °C to 8 °C shelf life can be significantly prolonged.