When added on a 2-roll mill, 0.5 to 1% of BLUESIL ADD 904 has a very noticeable effect on the green strength of HCR mixtures. Whilst higher doses can be used (up to 2 %) without having a detrimental effect on the cured compounds’ mechanical properties, this may cause « mill shrinkage » to occur.Comments: BLUESIL ADD 904 tends to increase the swell, especially on slightly charged mixtures. Furthermore, its use is not recommended in transparent mixtures.The increase in Mooney Viscosity of MF 135 U and MF 175 U:For example, the table below gives the change in Mooney Viscosity obtained for MF 135 U and MF 175 U as a function of the BLUESIL ADD 904 dose.
MF 135 U
MF 175 U
BLUESIL ADD 904 is an agent designed to increase the green strength and the viscosity of HCR mixtures to improve their processability. It has a permanent effect.