Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
2006-02-21
2009-12-08
McClendon, Sanza L (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
C522S084000, C522S086000, C522S071000, C522S074000, C522S150000, C522S153000, C522S173000, C522S178000, C522S182000, C264S004100, C264S004300, C264S004330, C264S004700, C521S076000, C428S402200
Reexamination Certificate
active
07629394
ABSTRACT:
The present invention describes a process of preparing microcapsules in a UV curable water immiscible phase. The microcapsules formed according to the invention contain an aqueous phase core. The process comprises dispersing a water soluble or dispersible core material along with at least one wall forming prepolymer and a polycondensation polymerization catalyst into an aqueous solution. The aqueous phase is then dispersed into the water immiscible phase comprising UV curable monomers or oligomers forming droplets of the aqueous phase solution in the water immiscible phase. Polycondensation of the prepolymers is initiated to form polymeric wall material or microcapsules at or near the interface of the water immiscible solvent and droplets of aqueous phase solution. Following capsule formation, a UV initiator is dispersed in the water immiscible phase. The UV curable dispersion containing aqueous microcapsules can be coated on a substrate. The coating is then cured by UV irradiation forming a gelled, solidified, or dry coating of aqueous microcapsules.
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Appleton Papers Inc.
McClendon Sanza L
Mieliulis Benjamin
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