Polymer composition and process for the preparation thereof
AssigneeRohm and Haas Company
InventorsDavid Richard Amick, Ralph Craig Even, Ann Robertson Hermes, Rosemarie Palmer Lauer
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Abstract
An aqueous composition including a polymer having polymerized ethylenically unsaturated acid monomer is disclosed. The aqueous composition is prepared in the presence of select organic compounds. As provided is a process to prepare the aqueous composition. The aqueous composition is useful as a dispersant for inorganic particles, a thickener or rheology modifiers for various aqueous formulations, and as a dispersing resin.
Claims10
An aqueous composition comprising:
- a polymer comprising as polymerized units, based on the total weight of said polymer:
- a) from greater than 7.5 to 100 weight % of at least one ionic monomer, and
- b) from 0 to less than 92.5 weight % of at least one second monomer;
- wherein said polymer is formed by an aqueous free radical polymerization process in the presence of 0.01 to 1 weight %, based on the total weight of said polymer, of an organic compound selected from the group consisting of t-alkyl hydroperoxides, t-alkyl peroxides, t-alkyl peresters, and mixtures thereof, wherein said t-alkyl group has at least 5 carbon atoms.
An aqueous polymerization process for preparing an aqueous composition comprising a polymer, said polymer comprising as polymerized units, from greater than 7.5 to 100 weight % of at least one ionic monomer;
- and from 0 to less than 92.5 weight % of at least one second monomer, based on the total weight of said polymer;
- comprising the step of:
- a) polymerizing said monomers in an aqueous reaction medium by free radical polymerization in the presence of 0.01 to 1 weight %, based on the total weight of said polymer, of an organic compound selected from the group consisting of t-alkyl hydroperoxides, t-alkyl peroxides, t-alkyl peresters, and mixtures thereof, wherein said t-alkyl group has at least 5 carbon atoms.
Dependencies are inferred from the claim text.