It has been reported that flexible polymers

such as polybutadiene (PB)

can be introduced as fillers into oil absorbing resins to improve the tight network structure

low oil absorption ratio and irreversible oil-releasing properties of these resins which are prepared usually only by chemical crosslinking．However

the double-bond of PB can react with the monomers to introduce additional chemical crosslinks．In order to compare the synthesis and properties of high oil absorption resins filled with various materials

paraffin

is used as a filler without any double-bond in the suspension copolymerization of dodecyl methacrylate

styrene and ethylene glycol dimethacrylate initiated by benzoyl peroxide．The effects of monomer recipe

concentration of fillers and chemical crosslinks on the oil absorption capacity and gel fraction of copolymers obtained are studied．It is found that the high oil absorption resin filled with PB has physical crosslinks

while the resin filled with paraffin has none．The oil absorption capacity as well as the gel fraction of the former increase with the increasing of PB amount

and its controlled release properties are also affected．Meanwhile

the oil absorption capacity of the latter also increase

but its gel fraction does not change with the increasing of paraffin content．