SOME OBSERVATIONS ON THE MECHANISM OF CURE RETARDATION

  • Son, P.N. (The B.F. Goodrich Company, Research and Development Center)
  • Published : 1978.12.30

Abstract

1. A good retarder reacts fast with MBT and. forms a non-scorchy accelerator. 2. The decrease in cure rate$(k_1)$ is attributable to the slow cure rate of 2-cyclohexyldithiobenzothiazole(CDB). 3. Cyclohexyl polysulfides(CPS) and cyclohexylthioamine are believed to be also involved in the cure retardation. 4. The new retarder can stop crosslinking by intercepting the crosslink precursors. 5. Formation of cyclohexyl polysulfides and their lack of curing property may be responsible for the low state of cure when the new retarde is used. These results are schematically summarized in Figure 7.

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