Vulcanization agent Alkylphenol disulfide polymer VA-TB7
Composition: Para-tert-butylphenol disulfide(> 95 % ) + sulfur(< 3 %)
CAS NO.:60303-68-6
Synonym:
Mixture of tert-butylphenol disulfide polymer and sulfur;
Arkema Vultac TB7 equivalent;
Poly-tert-butylphenol disulfide;
Para-tert-butylphenol disulfide polymer;
Alkylphenol disulfide polymer sulfur donor;
Alkylphenol disulfide polymer;
Para-tertiobutylphenol Disulfide Polymer;
Tert-butylphenol disulfide polymer;
Curing Resin
Specification:
| Item | Standard | Test Way |
| Appearance | Yellow to light brown pastilles or powder | Visual |
| Sulfur content, % | 29.5-31.5 | Combustion |
| Softening point, ℃ | 95-115 | Ring & Ball |
Application:
① Alkylphenol disulfide polymer VA-TB7 is a Sulfur donor for natural and synthetic rubbers.
② Alkylphenol disulfide polymer VA-TB7 produces a high percentage of mono-sulfidic crosslinks that results in vulcanizates with superior aging characteristics.
③ Alkylphenol disulfide polymer VA-TB7 can be used as either complete or partial replacements for sulfur and thiuram and DTDM sulfur donors in EV and semi-EV type cure systems.
④ In tires Alkylphenol disulfide polymer VA-TB7 is used in the inner-liner, chafer,bead apex, sidewalls, and tread.
⑤ Industrial applications include noise damping blocks, motor mounts, dock fenders, elastic threads, automobile engine hoses, gaskets, belts, and other industrial rubber products that require good heat resistance.
⑥ Alkylphenol disulfide polymer VA-TB7 also aid in rubber processing.
⑦ Alkylphenol disulfide polymer VA-TB7 polychloroprene vulcanizates have improved flex life.
⑧ Alkylphenol disulfide polymer VA-TB7 is also an excellent bleaching agent,antioxidant,catalysts in the disproportionation of rosin or rosin esters.
⑨ Alkylphenol disulfide polymer VA-TB7 is a good vulcanizing agent for vegetable oils.
⑩ Dosage: 0.5~20 phr.2 phr is most preferably
Characteristics:
① Polymers: Natural rubber and synthetic elastomers. Especially good in curing rubber that contains chlorine such as chlorobutyl and polychloroprene.
② Synergism: Can be used with most typical rubber accelerators and sulfur. When used as a partial replacement for sulfur, Alkylphenol disulfide polymer TB7 tends to improve dispersion of other additives in the rubber.
③ Crosslink Type: Alkylphenol disulfide polymer TB7 promotes mono-sulfidic crosslinks resulting in vulcanizates with excellent heat and aging resistance.
④ Non-nitrosamine: Alkylphenol disulfide polymer TB7 does not produce nitrosamines like many of the other sulfur donors such as DTDM and the thiurams.
Advantages:
① Non-nitrosamine
② Lower tack to make it easier to stock and handle
③ Lower volatility
④ Lower volatile degradation products
⑤ Good compatibility with many rubber polymers
⑥ Very good antioxidant properties
⑦ Improve heat age properties of vulcanizates because of its generation of mono- and di-sulfic crosslinks
⑧ Increase the resinous plasticizer during processing
⑨ Increase the green tack in NBR,BR and SBR based compounds
⑩ Improve the dispersion of other compound ingredients into rubber
Package:
25kgs/paper drum;25kgs/kraft bag or as customer’s request;
Storage:
It should be stored in dry & cool environment(below 86 °F/30℃) in closed original containers.
Shelf Life:
2 years if stored as indicated above