alkylphenol disulfide polymer

sulfur content 29.5-31.5 %, softening point 95-115 ℃.nitrosamine-free vulcanizing & curing agent. It's a sulfur donor for natural and synthetic rubbers; a high percentage of mono-sulfidic crosslinks that results in vulcanizates with superior aging characteristics; It can be in the inner-liner, chafer,bead apex, sidewalls, and tread.it can be used as bleaching agent & catalyst in rosin，rosin ester and derivates.it also can act as vacanizing agent in vegetable oils.

Composition: Para-tert-butylphenol disulfide(> 95 % ) + sulfur(< 3 %)

Synonym:
Mixture of tert-butylphenol disulfide polymer and sulfur;
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:

Application:

● Alkylphenol disulfide polymer VA-TB7 is a Sulfur donor for natural and synthetic rubbers.
● Alkylphenol disulfide polymer VA-TB710 produces a high percentage of mono-sulfidic crosslinks that results in vulcanizates with superior aging characteristics.
● 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.  
● In tires Alkylphenol disulfide polymer VA-TB7 is used in the inner-liner, chafer,bead apex, sidewalls, and tread.
● 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.
● Alkylphenol disulfide polymer VA-TB7 also aid in rubber processing.  
● Alkylphenol disulfide polymer VA-TB7 polychloroprene vulcanizates have improved flex life.
● Alkylphenol disulfide polymer VA-TB7 is also an excellent bleaching agent,antioxidant,catalysts in the disproportionation of rosin or rosin esters.
● Alkylphenol disulfide polymer VA-TB7 is a good vulcanizing agent for vegetable oils.

● Dosage: 0.5~20 phr.2 phr is most preferably

Characteristics:

● Polymers: Natural rubber and synthetic elastomers. Especially good in curing rubber that contains chlorine such as chlorobutyl and polychloroprene.
● Synergism: Can be used with most typical rubber accelerators and sulfur. When used as a partial replacement for sulfur, Alkylphenol disulfide polymer VA-TB7 tends to improve dispersion of other additives in the rubber.
● Crosslink Type: Alkylphenol disulfide polymer VA-TB7 promotes mono-sulfidic crosslinks resulting in vulcanizates with excellent heat and aging resistance.
● Non-nitrosamine: Alkylphenol disulfide polymer VA-TB7 does not produce nitrosamines like many of the other sulfur donors such as DTDM and the thiurams.

Advantages:
● Non-nitrosamine
● Lower tack to make it easier to stock and handle
● Lower volatility
● Lower volatile degradation products
● Good compatibility with many rubber polymers
● Very good antioxidant properties
● Improve heat age properties of vulcanizates because of its generation of mono- and di-sulfic crosslinks
● Increase the resinous plasticizer during processing
● Increase the green tack in NBR,BR and SBR based compounds
● Improve the dispersion of other compound ingredients into rubber

Package:

• 25kgs/paper drum

• 25kgs/kraft bag

• 25kgs/carton box

• 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