Frequently asked questions
Which grades of Lotader® are design for the extrusion lamination of primed films ?
Which grades of Lotader® are recommended for the extrusion laminations of non-primed printed films ?
Lotader® 4503 was designed for the extrusion lamination of unprimed printed films and metallized films. SK Functional Polymer is able to design special grades if our customers meet bonding issues with some specific inks. Lotader® 4503 has an outsanding processability. It is recommended to contact SK Functional Polymer to obtain the processing conditions of Lotader® 4503.
Which grades of Lotader® range are recommended as coupling agents for HFFR compounds?
Lotader® 3210 and 3410 are widely used as coupling agents to improve the mechanical properties of highly filled fire retardant compounds.
Lotader® 3210, a terpolymer with high maleic anhydride content, has be showed to improve significantly the water resistance of HFFR compounds when combined with Orevac® 18341.
What is the heat stability of SK's Functional Polymer?
The acrylate based products (Lotader®, Lotryl®) are heat stable up to 300°C
Evatane® Resins: are heat stable up to 250°C
Which factors determine the cold temperature properties of SK's Functional Polymer?
The flexibility and the impact strength at low temperature increase with higher amounts of comonomer (methyl, ethyl, or butyl acrylate; vinyl acetate) content.
The glass transition temperature (Tg) of the specific acrylate present in the Lotader® Resins or Lotryl® Resins also influences the low temperature properties. Butyl acrylate has a lower Tg than methyl acrylate or ethyl acrylate and therefore has better cold temperature properties:
- Tg (G’’)
- Methyl Acrylate: -30°C
- Ethyl Acrylate: -35°C
- Butyl Acrylate: -45°C