With our POLYVEST® product range we offer a range of stereospecific, low viscous and unsaponifiable liquid polybutadienes of different chemical compositions:
POLYVEST® - non-functionalized liquid polybutadienes
POLYVEST® MA - maleic anhydride-functionalized liquid polybutadienes
POLYVEST® HT - hydroxyl-terminated liquid polybutadienes
POLYVEST® ST - silane-terminated liquid polybutadienes
Our non-functionalized products differ in molar mass and viscosity.
The MA-functionalized products are adducts of linear polybutadiene and maleic anhydride and differ in maleic anhydride content and viscosity. The anhydride groups are randomly distributed along the polymer chains and thus make the originally apolar polybutadiene more polar and accessible for various chemical reactions.
The hydroxyl-terminated product is an alpha-omega-terminated diol of polybutadiene manufactured by radical polymerisation process. In addition to the double bonds in the polymer backbone, the hydroxyl functional groups provide opportunities for precise chemical modifications.
The silane-terminated products represent a new generation of functionalized liquid rubber additives. They combine the advantages of liquid rubbers and functional silanes. Their silane functionalities allow the surface modification of hydrophilic
silica fillers and therefore improve the dispersibility of silica in rubber compounds. Due to its rubber-based nature POLYVEST® ST exhibits a natural fit and excellent compatibility to rubber matrix of tire compounds.
POLYVEST® ST is available in three different grades with varying degree of silanization, which allows to optimize the silane/rubber ratio depending on the individual performance needs.