Latex from conjugated diene butyl rubber

Details Latex from conjugated diene butyl rubber Latex from conjugated diene butyl rubber

1974-08-09

1976-09-28

Rzucidlo, Eugene C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 297B, 260 297AT, 260 297EM, C08L 4700

Patent

active

039830624

ABSTRACT:
A process for preparing latices in ionomeric form from copolymers of an isoolefin containing from 4 to 7 carbon atoms and a conjugated multiolefin containing from 4 to 14 carbon atoms, where a major portion of said conjugated multiolefin has conjugated diene unsaturation, is disclosed. The process principally comprises forming an adduct of conjugated diene butyl rubber with a dienophile capable of implanting carboxylic acid functionality on the polymer such as maleic anhydride, emulsifying the adduct thus formed, and neutralizing the resulting emulsion with a suitable base. Highly improved ionomeric latices are also disclosed, having an average particle size of less than about 1 micron, average solids contents easily adjusted from between about 5 to 70 weight percent solids, and having a pH, depending on the emulsifier used, of from 3 to 12. Films cast from these latices have an improved tensile at break of greater than about 2500 psi.

REFERENCES:
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patent: 2871137 (1959-01-01), Aldridge et al.
patent: 2933468 (1960-04-01), Aldridge et al.
patent: 3414432 (1968-12-01), Mertzweiller et al.
patent: 3428589 (1969-02-01), Coats
patent: 3775387 (1973-11-01), Baldwin
patent: 3816371 (1974-06-01), Baldwin et al.
patent: 3886110 (1975-05-01), Go et al.

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