EP0023748A1 — A method for water-in-oil suspension polymerization of water-soluble monomers using an improved aminated suspending agent
Assigned to Dow Chemical Co · Expires 1981-02-11 · 45y expired
What this patent protects
This invention is a method for water-in-oil suspension polymerization for making polymers of water-soluble ethylenically unsaturated monomers. This method comprises (1) forming a water-in-oil suspension of an aqueous solution containing a water-soluble ethylenically unsaturated m…
USPTO Abstract
This invention is a method for water-in-oil suspension polymerization for making polymers of water-soluble ethylenically unsaturated monomers. This method comprises (1) forming a water-in-oil suspension of an aqueous solution containing a water-soluble ethylenically unsaturated monomer dispersed in an inert hydrophobic organic liquid containing an aminated inorganic suspending agent having a low hydrophile-lyophile balance and (2) heat polymerizing the suspended monomer in the presence of a catalytic amount of a polymerization initiator to form a water-in-oil suspension of polymeric product. The method is characterized in that the suspending agent is substantially free of unreacted aminating agent.
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