Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
5253333, 525379, 525380, 525381, 5253267, 5253271, 5253282, 5253294, 521 27, 424 78, 424329, 526293, C08F11402, A01N 3312, C08F21402
Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.
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Dawson Daniel J.
Sheldon Bernard G.
Weinshenker Ned M.
Wingard, Jr. Robert E.
Kilcoyne John M.
Meyers Albert T.
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