The bladder coating agents used in the curing process in the domestic tire manufacturers are
different.Normally emulsified silicone oil are used for the curing of bias ply tires, half-permanent bladdercoating agents, which are generally imported or made by foreign-captital enterprises, are mostly used for the curing of radial tires. The SBC series bladder coating agent made by Qingdao Fihonor Chemical Science&Technology Co., Ltd is a kind of half-permanent reactive silicone bladder coating agent, the main differences between the SBC bladder coating agent and emulsified silicone oil are as follows.
SBC series Bladder Coating Agents
Emulsified silicone oil
Emulsion of Si-O-C reactive silicone polymer
Emulsion of deactivate silicone oil
Status under high Temperature
Polymerizes to form macromolecules film
No any change
Status on the surface of bladder
Continuously build a white thin film, protect
and extent the service life of bladder
Oily status, contaminate the bladder
and shorten the service life of bladder
Appearance of inside of tire after vulcanization
The inside of the tire is clean,
smooth and dry.
Rubber shortage after vulcanization
greasy surface inside tire
Consequence whenthe mould is cont-aminated by applying
Form white dry spots on the moulds, no
negative effects to the tires
Greasy and dirty
The number of release after one coating
High release times, and will increase
after being used for some time.
Normally low release times, seldom
to reach 8 times
Effect to tire inner liner splice
Form dry film at high temperature, can
protect the inner liner splice.
Easy to infiltrate into the inner
liner splice, cause cracking
Effect to tire corner
Will not cause edge in chamfers
Easy to cause edge in chamfers
Higher unit price, higher performance/cost ratio
Lower unit price,lower performance/
From the contrast above, it is clear that using SBC series as bladder coating agents to
replace emulsified silicone oil is an inevitable trend for the domestic tire manufacturers to
improve the quality and appearance of the tire.