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US 9,006,365 B2Granted
Method of making polymeric bead from phosphorous acid containing monomers
AssigneeRohm and Haas Company
InventorsJames C. Bohling, Jose Antonio Trejo-O'Reilly
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Abstract
The present invention is a method for making a polymeric bead by suspension polymerization processes from a phosphoric acid monoester.
Claims20
A process for preparing polymeric beads which comprises:
- i) forming a suspension,
- wherein the suspension comprises at least one phosphorus-containing acid monomer, an aqueous medium, a free-radical initiator, and a suspending agent;
- wherein the suspending agent is selected from the group consisting of partially hydrolyzed polyacrylamide, polyvinyl alcohol, kaolin, tricalcium phosphate, hydroxyalkyl cellulose, and mixtures thereof;
- wherein the phosphorous-containing acid monomer has the structure
- wherein R is acryloxy or methacryloxy and wherein R′ is H or an organic group;
- ii) and allowing the monomers to polymerize until they have formed water insoluble polymeric beads.
3 more elements
A process for preparing polymeric beads which comprises:
- i) forming a suspension,
- wherein the suspension comprises at least one phosphorus-containing acid monomer having the structure
- wherein R is acryloxy or methacryloxy and wherein R′ is H or an organic group;
- an aqueous medium, a free-radical initiator, and a suspending agent;
- wherein the aqueous medium comprises from 5 weight % to saturation of a water-soluble, non-reactive inorganic salt;
- ii) and allowing the monomers to polymerize until they have formed water insoluble polymeric beads.
3 more elements
A process for preparing polymeric beads which comprises:
- i) forming a suspension,
- wherein the suspension comprises at least one phosphorus-containing acid monomer having the structure
- wherein R is acryloxy or methacryloxy and wherein R′ is H or an organic group;
- an aqueous medium, a monomer-soluble free-radical initiator, and a suspending agent;
- ii) and allowing the monomers to polymerize until they have formed water insoluble polymeric beads.
2 more elements
Dependencies are inferred from the claim text.