Process for preparing an aqueous dispersion of a quaternary...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

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C442S059000, C442S327000, C442S409000, C526S318440, C526S319000, C526S320000, C526S348000

Reexamination Certificate



A method of making an ion triggerable cationic polymer by solution copolymerizing one or more vinyl-functional cationic monomers, one or more water insoluble or hydrophobic vinyl monomers with alkyl side chains up to 4 carbons long, and, optionally, a minor amount of one or more vinyl monomers with linear or branched alkyl groups longer than 4 carbons, alkyl hydroxy, polyoxyalkylene, or other functional groups. The solution polymerization is accomplished by free radical polymerization in a mixture of an organic solvent such as acetone and water. After polymerization is complete, the organic solvent is preferably removed by a continuous process. The continuous process is preferably performed using a plate evaporator system.

patent: 5312883 (1994-05-01), Komatsu et al.
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patent: 5384189 (1995-01-01), Kuroda et al.
patent: 6423804 (2002-07-01), Chang et al.
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patent: 2003/0032352 (2003-02-01), Chang et al.
patent: WO02/077040 (2002-10-01), None
patent: WO2004/026354 (2004-04-01), None


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