Technical Paper Archive


This site contains all papers presented at Rubber Division, ACS Technical Meetings from 2000-2018. Meetings prior to 2000 are incomplete and papers are added as they are digitized.


For older papers not listed here, please send your request, including Meeting Year, Title, Author, and Paper # to: cbrady@rubber.org


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NOVOR 800 - A NEW HEAT-RESISTANT VULCANIZING SYSTEM

66

Event: 182nd Technical Meeting
Location: Cincinnati, OH
Date: October 09, 2012
Author: Graham T. Spiller, Stuart Cook and Andrew V. Chapman*.
Paper Number: 66

Price: $20.00

  • The Novor vulcanizing systems are based on adducts of a nitrosophenol with a bis- isocyanate. The Novor systems were developed to provide reversion-resistant cures, in particular in NR at high cure temperatures. For many years Novor vulcanizates have also been associated with fatigue resistance that increases upon heat ageing. Historically, they have been used together with accelerators, such as ZDMC and TMTM, but these are of increasing concern due to their association with nitrosamine generation. However, simple replacement of ZDMC or TMTM with accelerators considered safe as regards nitrosamines leads to a reduction of the improvement in aged fatigue life seen with a traditional Novor-based system. Using an experimental design approach, a new addition (Novor 800) to the Novor cure system family has been developed. When paired with a nitrosamine-safe accelerator, TBzTD, this new system provides significant improvements in aged fatigue lifetimes compared to previous combinations, coupled with a reduction of 20% in compression set. These results suggest that Novor 800 could be appropriate for applications for which the Novor systems were not previously considered.

    Papers from 182nd Technical Meeting

    Items from 182nd Technical Meeting