Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-10-30
1992-10-13
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 61, 525 62, C08F 812
Patent
active
051551675
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-diallylamide, 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.
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W. M. Brouwer et al., "Copolymers of Vinylamine and Vinylalcohol by Acid Hydrolysis of Poly (N-Vinyl-Tert-Butylcarbamate-co-Vinylacetate): Evaluation of Reactivity Ratios," J. Poly. Sci. Polym. Chem. ed., vol. 22, pp. 2353-2362 (1984).
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Lai Ta-Wang
Pinschmidt, Jr. Robert K.
Wempe Lawrence K.
Air Products and Chemicals Inc.
Brewer Russell L.
Marsh William F.
Schofer Joseph L.
Simmons James C.
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