Cyclic olefin copolymer

Cyclo -olefin copolymers (COC ) are a class of engineering polymers.

Properties

Although only consisting of olefins, COC, in contrast to the semi-crystalline polyolefins such as polyethylene and polypropylene, amorphous, and thus transparent. The properties of COC can be changed by changing the mounting conditions of the cyclic and linear olefins within a wide range. Substantially so that the heat resistance in a range of 65 to 190 ° C is set.

Allen COCs are a number of common features such as good thermoplastic fluidity, high stiffness, strength and hardness as well as low density and high transparency with good acid and alkali resistance.

Use

For optical applications, the low birefringence is interesting. In the medical / diagnostics, the excellent biocompatibility, particularly blood compatibility and the extremely low water absorption / water vapor permeability are emphasized.

Commercial applications of COCs are therefore different optical functional films in flat panel displays as well as lenses and sensors. In the medical / diagnostic pre-filled syringes, microplates, cuvettes and vials are used. Also known as blister and shrink or twist film come COCs used.

Trade names

Under the trade name Topas one belonging to the group of COC plastic was developed in the Central Research of Hoechst AG.

Then the field of engineering thermoplastics went to the splitting of the Hoechst AG to the newly established company Ticona GmbH, which was the Celanese AG divides. Following the acquisition of Celanese AG by the U.S. investment firm Blackstone topaz business was sold.

Since January 2006, the former Business Line Topas by Ticona is run as a joint venture ( JV) of Daicel Chemical Industries (55 %) and the Polyplastics (45% ) under the name Topas Advanced Polymers.