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US 6,747,102 B1Granted
Method for radical aqueous emulsion polymerization
AssigneeBASF SE
InventorsDavid Christie, Jerome Claverie, Saba Kanagasabapathy
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Abstract
In a process for the free radical-initiated aqueous emulsion polymerization for the preparation of an aqueous polymer dispersion, ethylenically unsaturated monomers are polymerized by means of a free radical polymerization initiator in the presence of organometallic compounds having a controlling effect.
Claims16
A process comprising:
- dispersing at least one chemical compound having at least one ethylenically unsaturated group in an aqueous medium and
- polymerizing the compound with at least one free radical polymerization initiator in the presence of at least one organometallic compound, wherein the organometallic compound has the following structural feature of formula I,
- where:
- Me is a metal ion,
- is a covalent bond or a monoatomic to triatomic covalent, bridging chain, not including the atoms bonded to the chain, and is a covalent bond to a neighboring atom,
- wherein the organometallic compound has a solubility in acidic, basic, or neutral water at 20° C. and 1 bar absolute greater than the solubility in styrene,
- wherein the polymerizing is a free radical-initiated aqueous emulsion polymerization, and
- wherein said process provides an aqueous polymer dispersion.
5 more elements
Dependencies are inferred from the claim text.