Akrochem Accelerator VS

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Akrochem Accelerator VS
Categories:	Other Engineering Material
Material Notes:	Product Description: Accelerator VS (ZBPD) is a non-staining and non-blooming accelerator for EPDM compounds and other sulfur curable elastomers. It offers good processing safety, medium fast curing characteristics, and is suitable for low sulfur cures. Powerful acceleration and a high degree of cross-linking can be obtained in conjunction with secondary accelerators. Levels of 2-4 phr Accelerator VS are typical. For highly loaded stocks up to 5 phr may be used with 1.5 - 2.5 phr of sulfur. For faster rates of cure and higher degrees of cross-linking secondary accelerators, such as thiazoles, dithiocarbamates and thiurams must be added. It is important that levels are kept below the concentration causing blooming of the vulcanizates. A typical composition range would be: Sulfur: 0.5 – 2.5 phr; Accelerator VS: 2.0 – 4.0 phr; MBTS (use BBTS for better scorch protection): 0.5 – 1.5 phr; TMTD (use TBzTD for non-nitrosamine): 0.6 phr. Accelerator VS yields fully cured compounds even without the use of secondary accelerators. The physical properties of the vulcanizates are comparable to those obtained with the blooming ultra-accelerator combinations. This is of value in hose and belt applications wherein normal amine-based accelerators may have a deleterious effect on polyester yarn. Information provided by Akrochem Corporation
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Available Properties
Specific Gravity Sulfur, S

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