Issue 6/2018 - New tyre solutions for environmental friendliness and efficiency

LANXESS Rhein Chemie (RCH) has launched new solutions for the tire industry, including a wide range of environmentally friendly isolators Rhenodiv, permanently coated capsules, nitrogen-free accelerators, pre-dispersed aramid staple fibers and other additives
.

In the production of self-healing tires or low-noise tires, the separator adhering to the inner wall of the tire must be completely removed after vulcanization, which is an important step
to ensure the adhesion of polymer memory materials in the subsequent spraying of the tire.
New water-soluble silicone-free isolators such as Rhenodiv BP-166 and Rhenodiv BP-9500 are easier to clean and remove than traditional silicone-containing isolators while meeting the growing demand
from automakers for silicone-free tire production.
Capsules with a permanent coating can vulcanize tires without spraying with isolators, eliminating the need for cleaning after
curing tires.
The tire preform does not need to be sprayed, so it does not contaminate critical parts of the tire or the workplace, and this technology also ensures silicone-free tire production
.

With a wide range of special accelerators and pre-dispersed fibers, RCH offers the tire industry an ideal solution
that does not produce nitrosamines and high reinforcement.
RCH's dithiophosphates, including Rhenogran TP-50 and Rhenogran SDT-50, are nitrogen-free accelerators that replace typical hyposulfinamide, tyuram, and carbamate accelerators
.
The advantage of these products is that the cross-linked bonds formed are mainly monosulfide bonds and disulfide bonds, and the thermal stability of the rubber compound is improved and it is not easy to return
.
At the same time, the use of dithiophosphate and sulfinamide accelerators creates a synergistic effect, thereby increasing production efficiency
.
The new Rhenogran P91-40 series of pre-dispersed aramid staple fibers provide excellent reinforcement properties
for tire compounds under extreme mechanical, dynamic and thermal load conditions.
It helps to homogenize durable, lightweight Twaron aramid staple fibers into compounds, not only for typical tire rubbers such as NR, IR, BR and SBR, but also for many other types of rubber
such as EPDM, CR and NBR.