Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1970-06-08
1977-09-20
Anderson, Harold D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
252316, 260 25R, 260 296MQ, 260 296MH, 260875, 260884, 260885, 260887, 260901, 428500, 428520, 526203, C08L 2506
Patent
active
040496040
ABSTRACT:
Aqueous dispersions of normally solid, organic polymeric particles are prepared by (1) dispensing an oil phase containing at least one emulsion polymerizable monomer such as styrene in an aqueous phase containing a stabilizing emulsifier such as sodium dodecyl benzene sulfonate and a polymer of a sulfo ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid such as a 2-sulfoethyl methacrylate n-butyl acrylate copolymer and (2) subjecting the dispersion to emulsion polymerization. Microspheres having liquid centers and seamless rigid walls of a normally solid, organic polymer are prepared according to the above method except that the starting oil phase also contains a non-polymerizable, water-insoluble liquid such as hexane.
REFERENCES:
patent: 2874151 (1959-02-01), Medalia
patent: 2883369 (1959-04-01), Rees
patent: 2969331 (1961-01-01), Brynko et al.
patent: 3147301 (1964-09-01), Sheetz
patent: 3177172 (1965-04-01), Adams
patent: 3424706 (1969-01-01), Smith et al.
Bolton, deceased Frank Harold
Morehouse, Jr. Donald S.
Anderson Harold D.
Jenkins M. S.
The Dow Chemical Company
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