Kynar Flex® PVDF

Arkema has developed a fluorinated copolymer, Kynar Flex^® Polyvinylidene Fluoride (PVDF) PPA, for use as a process aid for the extrusion of polyolefins (linear low density polyethylene, high density polyethylene, polypropylene), in particular in the form of film.

Kynar Flex^® PVDF PPA is added in low concentrations, of the order of 0.02% to 0.08%, to help increase processing speed while reducing energy consumption, processing temperatures and pressure. It also helps prevent blockages in equipment and, in particular, the formation of drops and knots on converting lines.

As regards finished product, Kynar Flex^® PVDF PPA enhances the film's transparency and mechanical properties, and eliminates "sharkskin" surface defects and melt fracture.

Pebax® Resin has been found to be effective as a processing aid for both ester based and ether based thermoplastic urethanes (TPUs). The addition of about 10% Pebax^® Resin results in benefits such as lower torque, lower die pressure, lower viscosity and higher output rates. Processing and physical properties can be improved by modification of most TPU with Pebax^®

Functional Polyolefins

Impact Modifiers for Engineering Plastics

Temperature resistant thermoplastics (for example PA, PBT, PET and PC/PBT alloys) are more widely used in the automotive, electrical & electronic industries. Significant parts of these markets need improved impact resistance. Ethylene copolymers with high comonomer content and therefore good elastomeric behaviour can be successfully used as impact modifiers.

Lotader® Resin MAH grades give excellent performance in modifying polyamides ranging from flexible PA to super-tough PA, while Lotader^® GMA grades are the most suited to the modification of thermoplastic polyesters. Lotryl™ Resin is frequently combined with Lotader^® Resin to optimise processability, impact strength and cost.

Lotader^® Resins and Lotryl™ Resins are totally miscible with polyolefins (PO), and therefore are good compatibilisers for PA/PO and polyester/PO blends, as well as PET recycling.

Coupling Agents

For applications requiring blends of polymers with fillers (mainly long glass fibres or glass mat), the mechanical properties can be affected by lack of cohesion between polymer and filler.

Specific grades of Orevac™ Resin and Lotader^® Resin can be used as coupling agents to improve adhesion at the interface between the polymer and filler. Typical examples could be glass fibre reinforced PP compounds which are mostly used in the automotive industry to reduce weight and improve rigidity.

Orevac™ Resin has been specifically designed as a coupling agent for this purpose in order to optimise mechanical performance.

Orevac™ Resin is also used as a compatibiliser for fillers such as talc, mica, wollastonite, calcium carbonate or materials such as cellulose fibres and wood flour.

For more information, visit our product-specific Web sites:

	Methane Sulfonic Acid
	Functionalized Polyolefins
	Kynar® and Kynar Flex® PVDF
	Lotader® Resins
	Lotryl™ Resins
	Orevac™ Resins
	Pebax® Resin