Claimed to be the world’s first coupling agent for carbon fibre, it is used in vinyl esters and unsaturated polyester resins that are processed to composite parts using carbon fibre. The cross-fibre strength is greatly improved, making far greater design freedom possible. BYK-C 8013 increases both the transverse tensile strength and the flexible strength of the composite by means of improved fibre-matrix bonding. The chemical structure of the additive provides simultaneous adhesion to the fibre and to the resin matrix. This property makes changes in the component design possible, and it enables particularly durable components to be manufactured. In hot-curing processes such as SMC/BMC, pultrusion, prepreg or RTM, BYK-C 8013 brings about increases in strength of up to 70%.
The reactive additive can be introduced to the size during fibre production or to the resin shortly before processing. In subsequent, so-called ‘second sizing,’ BYKC 8013 can, for example, be applied to the fibre in a spraying process, without the need to remove the first coat beforehand.
Visit BYK in Hall 5A, Stand E40 at JEC World 2018.