Will this help?
All that I have.
Are all Silicone oils the same? suppose not?
The hydroxy-terminated polymer is a polymer whose ends are provided with OH groups. The cross-linking agent, which preferably contains H+ ions, reacts therewith under hydrolysis, i.e. the separation of water. In practical trials that are presented in Table 1, a number of different hydroxy-terminated polymers have been employed. CDS 750 is a hydroxy-terminated silicon oil of a viscosity of 750 cP. H48V750 is another supplier's designation of the same substance. CDS 100 and H48V100, respectively, constitute a hydroxy-terminated silicon oil whose viscosity is 100 cP. Its included polymer chains are shorter and the strands or threads 15, 18 which are formed are shorter before breaking compared with CDS 750 and H48V750, respectively. Many of the properties of CDS 100 and H48V100, respectively, may be considered as superior to those of CDS 750 and H48V750, respectively, for the practical applications under consideration here, but one drawback is that CDS 100/H48V100 is considerably more expensive.
Even if many hydroxyl-terminated polymers may be employed, it has proved that hydroxyl- terminated silicon oil offers major advantages. On the one hand, a binder 3 will be obtained which has an extremely good internal adhesion, and, on the other hand, it displays very good adhesion to silicon and silicon rubber which may advantageously be employed for surface treatment of the particles 2.
A further ingredient that is advantageously employed in the binder, while not being absolutely necessary, is a hydroxy-containing polymer. Like the hydroxy-terminated polymer, it contains OH groups which may react with the cross-linking agent, but these groups need not be placed at the ends of the molecules. One such polymer which has been employed in practical trials is hydrogenated ricin oil, marketed under the designation Luvotix HT. This polymer is a fatty acid which has one OH group on the 12th carbon atom. Some of its favorable properties are that it binds with pigment that possibly be added, that it is configurationally stable and that it is quite economical. In a combination with CDS 750 as hydroxy-terminated polymer, the positive properties of CDS 100 will be attained at the same time as its drawbacks are reduced or wholly obviated.