Compositions – Preservative agents – Anti-corrosion
Patent
1991-03-26
1992-03-03
Stoll, Robert L.
Compositions
Preservative agents
Anti-corrosion
2523635, 521 54, 521 55, B01F 1700
Patent
active
050930303
ABSTRACT:
A dispersion containing minute polymer beads possessing a thermosensitive characteristic is produced by a method which comprises preparing an aqueous solution of an acrylamide type vinyl compound, the homopolymer of which exhibits a hydrophilicity-hydrophobicity thermoreversible solubility characteristic, adding a cationic or anionic surfactant in a ratio equaling or exceeding the micelle concentration to the aqueous solution, adjusting the resultant aqueous solution to a temperature not lower than the clouding point thereof and, at the same time, polymerizing the acrylamide type vinyl compound in the aqueous solution thereby forming a polymer emulsion, exposing the emulsion to an ionizing radiation thereby cross-linking minute polymer beads in the emulsion, and thereafter depriving the resultant polymer emulsion of the surfactant.
REFERENCES:
patent: 4059552 (1977-11-01), Zweigle et al.
patent: 4172066 (1979-10-01), Zweigle et al.
patent: 4972000 (1990-11-01), Kawashima et al.
Derwent Abstract JP 127336/1987 "Particles of Polymer with Internal Bore . . . ".
Macromolecules, 19, (1986), Jiro Kumaki, "Polystyrene Monomolecular Particles Obtained by Spreading Dilute Solutions on the Water Surface", pp. 2258-2263.
Macromolecules, 19, (186), D. A. Tomolia, "Dendritic Macromolecules: Synthesis of Starburst Dendrimers", pp. 2466-2468.
Fujishige Shouei
Ito Shoji
Tlirasa Okihiko
Yamauchi Aizo
Agency of Industrial Science and Technology
Bhat N.
Ministry of International Trade and Industry
Stoll Robert L.
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