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New Accelerated and Scorch Protected VAROX ® Peroxides for Polymer Crosslinking R.T. Vanderbilt Company, Inc.

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Presentation on theme: "New Accelerated and Scorch Protected VAROX ® Peroxides for Polymer Crosslinking R.T. Vanderbilt Company, Inc."— Presentation transcript:

1 New Accelerated and Scorch Protected VAROX ® Peroxides for Polymer Crosslinking R.T. Vanderbilt Company, Inc.

2 Requirements at various steps of the process Compounding (120 – 135°C)  From 2 step to 1 step mixing  Faster mixing speed (higher temperature) Extrusion (130 – 145°C)  Faster extrusion speed (higher temperature)  Greater output requires faster curing Injection Molding (170 – 185°C)  Faster curing  Higher number of mold cavities (design) Compression Molding (170 – 185°C)  Faster curing  Increase filling time to decrease rejects  higher t S 5  lower t ʹ 90  higher t S 2 or lower t ʹ 90  higher t S 2  higher t S 2 and/or lower t ʹ 90  higher t S 2

3 Two additional product ranges VAROX SP = S corch P rotected  Enhanced scorch protection VAROX CST = Controlled Speed Technology  Enhanced scorch protection and faster rate of cure Technology initially developed in VAROX C/KE, then with other peroxides such as VAROX 231 and DBPH...

4 Two additional product ranges VAROX SP = S corch P rotected  Enhanced scorch protection VAROX CST = Controlled Speed Technology  Increased scorch protection and faster cure time

5 tS5tS5 MHMH t’90 VAROX SP : Scorch Protected

6 t’90 tS5tS5tS5tS5 MHMH MHMH VAROX SP : Scorch Protected

7 t ʹ 90 Faster radical trapping SP: source of radicals MHMH tS5tS5tS5tS5 = M H VAROX SP : Scorch Protected

8 M H and t ʹ 90 are comparable t s 5 X 3 at 125°C VAROX SP: Scorch Protected

9 -The lower the temperature, the more efficient the scorch protection VAROX SP VAROX 802-F40 X 3.5 X 3.0 VAROX SP: Scorch Protected X °C - Possibility to increase mixing speed as a 12°C temperature increase does not affect process safety

10 - Same reactivity as VAROX VAROX SP VAROX VAROX SP: Scorch Protected

11 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 rejects Possibility of reducing the amount of antioxidant in the rubber formulation With such scorch resistance:

12 Two additional product ranges VAROX SP = S corch P rotected  Enhanced scorch protection Concept has been also evaluated on other peroxide grades

13 VAROX DBPH-50-SP (development) M H is not impacted t ʹ 90 is not impacted t s 5 is multiplied by 3 at 145°C

14 VAROX 231-XL-SP (development) M H is not impacted t ʹ 90 is not impacted t s 5 is multiplied by 3 at 110°C

15 VAROX 230-XL-SP (development) M H is unchanged t ʹ 90 is unchanged t s 5 is multiplied by 4 at 110°C

16 Two additional product ranges VAROX SP = S corch P rotected  Enhanced scorch protection VAROX CST = Controlled Speed Technology  Enhanced scorch protection and cure time

17 MHMH tS5tS5 VAROX CST: Controlled Speed Technology t’90

18 Fast Radical Trapping SP: source of radicals tS5tS5 tS5tS5 MHMH t’90 = M H Faster Curing t’90 VAROX CST: Controlled Speed Technology

19 Comparable efficiency Cure time is 20% lower with 802-CST VAROX CST: Controlled Speed Technology Scorch time x 3

20 - Same scorch as VAROX SP X 3.5 X 3.0 X 2.0 VAROX SP VAROX VAROX 802-CST VAROX CST: Controlled Speed Technology Scorch time - Possibility of increasing mixing speed as a 12°C temperature increase does not affect process safety + 12°C

21 802-CST is 20% faster than / SP whatever the curing temperature VAROX CST: Controlled Speed Technology Cure time VAROX SP VAROX 802-CST VAROX

22 VAROX CST: Controlled Speed Technology iso-M H comparison 30% faster than TAC & 17% faster than TRIM 125°C: X 2.5 vs. TAC X 3.5 vs. TRIM & HVA-2 32:33 14:02 9:24 9:34 6:28 4:06 4:33 12:48 HVA is a registered trademark of DuPont Dow Elastomers

23 Comparable mechanical performances VAROX CST: Controlled Speed Technology

24 VAROX 802-CSTVAROX TAC VAROX TMPTMA VAROX HVA 2 XL density ---- Cure time Scorch time Tensile strength ++ Elongation at break ++ Compression Set ++ VAROX 802-CST can replace peroxide + coagent

25 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 rejects Possibility to reduce the amount of antioxidant in the rubber formulation + Faster curing  extra gain in productivity SP + Faster Curing = CST With such scorch resistance + cure speed: SP

26 TWO NEW GRADES OF VAROX  SP (VAROX MB-SP)  Much better scorch resistance  Masterbatch  Commercially available CONCLUSIONS  CST (VAROX CST)  Faster cure  Increased scorch resistance  Powder & Granules  Available for sampling in 2Q04  Commercially available in 3Q04

27 Before 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.


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