Vulcanization agent Amylphenol disulfide polymer VA-5
Composition: tert-amylphenol disulfide polymer(75% )+silica gel(25%)
CAS NO.:68555-98-6
Synonym:
Mixture of tert-amylphenol disulfide polymer and silica gel
Amylphenol disulfide polymer;
Arkema Vultac 5 equivalent;
Poly-amylphenol disulfide polymer
Blend- Calcium Silicate, Amyl Disulfide Polymer
Curing Resin
Specification:
| Item | Standard | Test Way |
| Appearance | Beige free flowing powder | Visual |
| Sulfur content, % | 20.0-22.0 | Combustion |
| % Passing 50 Mesh | ≥98 | / |
| % Passing 20 Mesh | ≥99 | / |
| Water content,% | ≤2 | / |
Application:
① Amylphenol disulfide polymer 5is a Sulfur donor for natural and synthetic rubbers.
② Amylphenol disulfide polymer 5produces a high percentage of mono-sulfidic crosslinks that results in vulcanizates with superior aging characteristics.
③ Amylphenol disulfide polymer 5 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 Amylphenol disulfide polymer 5 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 Amylphenol disulfide polymer 5 also aid in rubber processing.
⑦ Amylphenol disulfide polymer 5 polychloroprene vulcanizates have improved flex life.
⑧ Amylphenol disulfide polymer 5 is also an excellent bleaching agent,antioxidant,catalysts in the disproportionation of rosin or rosin esters.
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, Amylphenol disulfide polymer 5 tends to improve dispersion of other additives in the rubber.
③ Crosslink Type: Amylphenol disulfide polymer 5 promotes mono-sulfidic crosslinks resulting in vulcanizates with excellent heat and aging resistance.
④ Non-nitrosamine:Amylphenol disulfide polymer 5 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:
20kgs/paper drum 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