Process for obtaining hydrophobically modified emulsion polymers and polymers obtained thereby
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United States of America Patent
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Oct 29, 1996
Grant Date -
N/A
app pub date -
Jul 24, 1995
filing date -
Jul 24, 1995
priority date (Note) -
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Abstract
The present invention is directed to a process for forming a hydrophobically modified emulsion, and the modified emulsion polymer obtained thereby. The emulsion polymer is formed by first combining hydrophobic polymeric compound and .alpha.,.beta.-ethylenically unsaturated monomer, to form a mixture and subjecting the mixture to high stress techniques to form surfactant stabilized particles of the hydrophobic polymer and monomers, in the aqueous phase. The .alpha.,.beta.-ethylenically unsaturated groups within the particles are co-polymerized to form a hydrophobically modified core polymer. Additional monomers including at least one .alpha.,.beta.-ethylenically unsaturated hydrophilic monomer are then added to the core polymer and polymerized by emulsion polymerization, to form a hydrophobically modified emulsion polymer.
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