German technical background VOK®- C 8013 Coupling agent

Solventless, polymer coupling agent to improve the mechanical strength of carbon fiber reinforced plastics cured by free radicals

Product Information

chemical composition 

Copolymer solution with functional groups

Typical Physicochemical Data

The data given in this data page are only typical values, not technical indicators of the product.

Density (20 ° C): 1.10 g/ml

Refractive index: 1.4667

Non volatile matter (10 minutes, 150 ° C):>90%

Storage and transportation

Storage and transportation below 40 ° C. Special precautions

Any color change or darkening of the material has no effect on the effectiveness of the product.

application area 

Thermosetting plastics

VOK®- C 8013

Product features and advantages

VOK®- C 8013 is specially developed for carbon fiber reinforced plastic systems for free radical initiated curing. The additive improves the mechanical properties of the final product by increasing the adhesion between the fiber and the matrix. The degree of increase depends on the choice of carbon fiber and matrix resin system.

Recommended use

VOK®- C 8013 is recommended for various carbon fiber reinforced systems initiated and cured by free radicals. Especially in the heat curing molding, such as SMC/BMC, pultrusion molding or RTM, the additive can improve the strength. VOK®- C 8013 can be used for vinyl ester fibers and epoxy fibers. It is applicable to various free radical curing matrix resins. The additive can be used as a secondary sizing agent for fibers, such as direct spraying without removing the first sizing agent. The storage period of the re sizing fiber is highly dependent on the storage conditions and should be determined by a series of tests.

The above recommended dosage is for reference, and good dosage shall be determined through a series of tests.

Recommended dosage

1-10% additives (purchased form) are based on size. 3-10% of additives (purchased form) are based on carbon fiber. 1-10% additives (purchased form) are based on resin.

Add to sizing agent: used as secondary sizing agent: added to resin:

Adding method and processing guidance

VOK®- C 8013 shall be added to the mix before use, or to the sizing agent or resin. For secondary sizing, the additive can be used in the spraying process.

Special precautions

when added to resin VOK®- C 8013 will affect the reactivity of the mixture, which must be checked before use.