n cetyl pyridinium chloride the alkylammonium intercalated clay hereafter referred as u201c clay 1 u201d was collected in a filter and dried an aqueous suspension containing 100 g montmorillonite powder and 24 g n cetyl pyridinium chloride was prepared as above to this aqueous suspension was added 9 ml of a silane coupling agent s 710 made by chisso cooperation japan u201c sila ace u201d product having the general formula ch 2 u2550 c ch 3 co 2 c 2 h 4 si och 3 3 and 2 ml of concentrated hydrochloride followed by thorough mixing an organoclay having olefinic functionalities hereafter referred as u201c clay 2 u201d was formed collected in a filter and dried clay 0 clay 1 and clay 2 were analyzed by x ray diffraction according to the results shown in table 1 the interlayer spacing d 001 of montmorillonite was increased from about 12 u00e5 to about 17 u00e5 this indicates that intercalation had taken place between the layers of montmorillonite thermo gravimetric analysis was performed on clay 0 clay 1 and clay 2 respectively the results are also listed in table 1 a pronounced weight loss 18 20 was observed during the heating period between 200 u00b0 c and 500 u00b0 c the results confirmed that the n cetyl pyridinium cation was intercalated between the layers of montmorillonite into a reactor equipped with a nitrogen inlet a stirring rod a condenser and a temperature control device 100 parts of styrene monomer 3 parts of clay 2 an olefinic functional organclay and 0 5 parts of benzoyl peroxide were charged the reactants were subjected to bulk polymerization at 70 u00b0 c for 6 hr following this 300 parts of an aqueous suspension of.