Chemical name: Polymeric sulfur
Crystex™ HD OT 20 is a non-blooming vulcanizing agent for unsaturated elastomers.
MAJOR APPLICATIONS AND PROPERTIES:
Crystex™ HD OT 20 is designed for improved flowability and dispersibility. It has the following advantages:
Because Crystex™ HD OT 20 is insoluble sulfur it is metastable. Therefore temperatures should be kept as low as possible during mixing. Between 100°C and 130°C, significant reversion to soluble sulfur can take place.
If dry pre-mixes are produced of Crystex™ HD OT 20 and other vulcanization chemicals, reversion can take place if Crystex™ HD OT 20 is in contact with the alkaline components.