Anti reversion Agent for sulfur vulcanized polymers

Anti-reversion Agent WK-901

Chemical Name: 1,3-bis(citraconimidomethyl)benzene
Molecular Structure:
Molecular Formula: C18H16O4N2
Molecular Weight: 324
CAS NO.: 119462-56-5
Specifications:

Properties and Applications:

WK-901 is an antireversion agent which provides long term heat stability in sulfur vulcanized compounds by substituting stable,

flexible carbon-carbon crosslinks for the sulfur crosslinks that are destroyed by reversion in the mold or during product service life.

It is used in most sulfur vulcanized polymers such as NR, IR, SBR, BR or blends to provide improved reversion resistance on overcure.

It is used to allow the use of higher curing temperature for improved productivity without sacrificing performance properties.

It ‘s not reactive during the initial stages of vulcanization. Scorch and cure time are therefore not affected, thus to be added without making other compound or process modifications.

The dosage level of WK-901 needs to be optimized based on the expected degree of reversion.

The recommended dosages are as follow:
Efficient to semi-efficient cure systems : 0.25 - 0.4 phr
Semi-efficient cure systems : <0.5 phr
Conventional cure systems : <0.75 phr
High sulfur compounds : <0.75 phr
Storage: Stored closely in a cool, dry, well-ventilated area. Avoid exposure to direct sunlight.
Package: In 20kg paper bags with plastic inner.

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