C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/500
C08F 216/06 (2006.01) C08F 8/12 (2006.01)
Patent
CA 2028365
PATENT 186PUS04060 ABSTRACT A modified poly(vinyl alcohol) copolymer is provided containing copolymerized units of allylamine and/or diallylamine by copolymerizing a vinyl ester, such as vinyl acetate, and an N-allylamide and/or N,N-diallyl- amide, such as N-allylformamide and/or N,N-diallylformamide and hydrolyzing first the ester groups to hydroxy groups and then the amide groups to amine groups. The second hydrolysis is carried out on solvent-swollen particulate polymer slurried in an acidic or basic medium. The modified polymer can contain small amounts of unhydrolyzed ester and amide groups in addition to the hydroxy and amine functionality which characterizes the copolymer.
Lai Ta-Wang
Pinschmidt Robert K. Jr.
Wempe Lawrence K.
Air Products And Chemicals Inc.
Lai Ta-Wang
Mcfadden Fincham
Pinschmidt Robert K. Jr.
Wempe Lawrence K.
LandOfFree
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