Vultac® products are alkylphenol disulfide oligomers, commonly used as nitrosamine-free vulcanizing agents. They act both as sulfur donors and as vulcanizing agents in rubber compositions. Thanks to their many advantages, Vultac® products enable formulators to reduce formulation costs while improving the performance of finished articles.

Vultac® products act as unique vulcanizing agents, forming both hybrid and conventional sulfur-containing bridges, as illustrated in the figure below. Hybrid bonds are made up of alkylphenol groups linked to elastomer chains by monosulfide or disulfide bridges.

Benefits and features:
In rubber, Vultac® grades as vulcanizing agents offer the following advantages:

• Thermal stability for better reversion resistance and thermal resistance.

• Relatively long hybrid bridges allow greater flexibility and improve mechanical and dynamic properties.

   

Other key properties :

• Non-blooming
• Non-staining
• Better adhesion due to tackiness
• Antioxidant behavior

• Improved co-vulcanization

   

Vultac® products are particularly recommended for halobutyl rubber applications (CIIR, BIIR, BIMS), but are also successfully used in a wide range of rubber formulations, including IIR, EPDM, NR, SBR and NBR.

You will find all our Safety Data Sheets on the website of Quick-FDS.