Saudi Basic Industries Corporation

Mohammed Hamdan

Syed Azhar Hashmi

Syed Mehmood Ahmed

Ghurmallah Ghamdi

A method of producing vinyl polymer particles by suspension polymerization comprising: combining an aqueous media and a tricalcium phosphate to a reaction vessel; adding a pH stabilizing agent to the reaction vessel; adding a vinyl monomer to the reaction vessel; adding a peroxide initiator, e.g., which also generates COas a result of primary or secondary decomposition, to the reaction vessel; adding surfactant or a water soluble free radical initiator to generate surfactant in situ to the reaction vessel; maintaining the reactor contents at greater than or equal to 90&#xb0; C. until a density of a dispersed phase becomes substantially equal to that of a continuous phase; adding a blowing agent to the reaction vessel; raising the temperature of the reaction vessel to greater than or equal to 100&#xb0; C.; and collecting polymer particles having a particle size distribution.

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Riyadh, Saudi Arabia

Mohammed Hamdan