Presentation on theme: "New Accelerated and Scorch Protected VAROX® Peroxides for Polymer Crosslinking R.T. Vanderbilt Company, Inc."— Presentation transcript:
1New Accelerated and Scorch Protected VAROX® Peroxides for Polymer Crosslinking R.T. Vanderbilt Company, Inc.
2Requirements at various steps of the process Compounding (120 – 135°C)From 2 step to 1 step mixingFaster mixing speed (higher temperature)Extrusion (130 – 145°C)Faster extrusion speed (higher temperature)Greater output requires faster curingInjection Molding (170 – 185°C)Faster curingHigher number of mold cavities (design)Compression Molding (170 – 185°C)Increase filling time to decrease rejects higher tS5 lower tʹ90 higher tS2 or lower tʹ90 higher tS2 higher tS2 and/or lower tʹ90
3Two additional product ranges VAROX SP = Scorch ProtectedEnhanced scorch protectionVAROX CST = Controlled Speed TechnologyEnhanced scorch protection and faster rate of cureTechnology initially developed in VAROX C/KE, then with other peroxides such as VAROX 231 and DBPH . . .
8VAROX SP: Scorch Protected MH and tʹ 90 are comparablets5 X 3 at 125°C
9VAROX SP: Scorch Protected The lower the temperature, the more efficient the scorch protectionPossibility to increase mixing speed as a 12°C temperature increase does not affect process safetyX 3.5X 3.0VAROX 802-F40+ 12°CX 2.0
10VAROX SP: Scorch Protected Same reactivity as VAROXVAROX
11With such scorch resistance: Possibility to compound faster by increasing mixing speed with no scorch threat (temperature can be increased with no scorch threat)Possibility to go from 2 step mixing to 1 step mixing (cost saving)Possibility to get faster curing process by increasing temperature with no scorch threat (injection, transfer and compression)Solve scorch problems (for sensitive compounds or scorchy EPDM i.e., ENB vs. DCP)Less downtime devoted to equipment cleanup (extruder, etc.)Less rejectsPossibility of reducing the amount of antioxidant in the rubber formulation
12Two additional product ranges VAROX SP = Scorch ProtectedEnhanced scorch protectionConcept has been also evaluated on other peroxide grades
13VAROX DBPH-50-SP (development) MH is not impactedtʹ 90 is not impactedts5 is multiplied by 3 at 145°C
14VAROX 231-XL-SP (development) MH is not impactedtʹ 90 is not impactedts5 is multiplied by 3 at 110°C
15VAROX 230-XL-SP (development) MH is unchangedtʹ 90 is unchangedts5 is multiplied by 4 at 110°C
19VAROX CST: Controlled Speed Technology Scorch time x 3 Comparable efficiencyCure time is 20% lower with 802-CST
20VAROX CST: Controlled Speed Technology Scorch time VAROX SPSame scorch as VAROX SPPossibility of increasing mixing speed as a 12°C temperature increase does not affect process safetyX 3.5VAROX 802-CSTX 3.0+ 12°CX 2.0VAROX
21VAROX CST: Controlled Speed Technology Cure time VAROX SP802-CST is 20% faster than / SP whatever the curing temperatureVAROXVAROX 802-CST
2230% faster than TAC & 17% faster than TRIM VAROX CST: Controlled Speed Technologyiso-MH comparison30% faster than TAC & 17% faster than TRIM125°C:X 2.5 vs. TACX 3.5 vs. TRIM & HVA-232:3314:029:249:346:284:064:3312:48HVA is a registered trademark of DuPont Dow Elastomers
24VAROX 802-CST can replace peroxide + coagent VAROX 802-CSTVAROX TACVAROX TMPTMAVAROX HVA2XL density-Cure time++++Scorch timeTensile strength++Elongation at breakCompression Set
25With such scorch resistance + cure speed: Possibility to get faster compounding by increasing mixing speed with no scorch threat (temperature can be increased with no scorch threat)Possibility to go from 2 step mixing to 1 step mixing (cost saving)Possibility to get a faster curing process by increasing temperature with no scorch threat (injection, transfer and compression)Solve scorch problems (for sensitive compounds or scorchy EPDM i.e. ENB vs. DCP)Less downtime devoted to equipment cleanup (extruder, etc.)Reduced rejectsPossibility to reduce the amount of antioxidant in the rubber formulation+ Faster curing extra gain in productivitySP + Faster Curing = CSTSP
26CONCLUSIONS TWO NEW GRADES OF VAROX Much better scorch resistance SP (VAROX MB-SP)Much better scorch resistanceMasterbatchCommercially availableCST (VAROX CST)Faster cureIncreased scorch resistancePowder & GranulesAvailable for sampling in 2Q04Commercially available in 3Q04
27Before using, read, understand and comply with the information and precautions in the Material Safety Data Sheets, label and other product literature. The information presented herein, while not guaranteed, was prepared by technical personnel and, to the best of our knowledge and belief, is true and accurate as of the date hereof. No warranty, representation or guarantee, express or implied, is made regarding accuracy, performance, stability, reliability or use. This information is not intended to be all-inclusive, because the manner and conditions of use, handling, storage and other factors may involve other or additional safety or performance considerations. The user is responsible for determining the suitability of any material for a specific purpose and for adopting such safety precautions as may be required. R. T. Vanderbilt Company does not warrant the results to be obtained in using any material, and disclaims all liability with respect to the use, handling or further processing of any such material. No suggestion for use is intended as, and nothing herein shall be construed as, a recommendation to infringe any existing patent or to violate any federal, state or local law or regulation.