BLUESIL ADD 916 is added to HCR’s on a 2-roll mill.The normal dosage is 0.5 % by weight with respect to the HCR pre-catalysed compound.Higher doses are not necessary and may even have a detrimental effect on the heat stability of cured compounds.Comments: BLUESIL ADD 916 tends to make transparent mixtures opaque.Improving the compression set of MF 135 U and MF 175 U by adding BLUESIL ADD 916:For example, the table below gives the change in mechanical properties for MF 135 U and MF 175 U with and without the addition of BLUESIL ADD 916.These properties are obtained after adding 2-4 dichloro benzoyl peroxide with 50 % active ingredients (Peroxide E) and curing for 8 minutes at.
Properties after post-curing for 4 hours at 200 °C
Compression set (22 h / 177 °C / 25 %)
Crumbly, white paste.
BLUESIL ADD 916 is an acid acceptor that improve the compression set of HCR’s cured with 2-4 dichloro benzoyl peroxide (especially for hot air curing), without post-curing.BLUESIL ADD 916 avoids efflorescence (blooming) of non post-cured, vulcanised compounds.