Patent ID: 7425290
Filing Date: 2008-09-16
Classification: B29B,B29C,C07C,C08K,C09K

Abstract:
1. A process of producing a compacted particulate polymer additive composition in a dry granular form, which process comprises: 1) forming a paste from (a) at least one particulate sterically-hindered phenolic compound, (b) one or more particulate polymer additives other than a sterically-hindered phenolic compound, and (c) an inert organic processing solvent that can be vaporized at a temperature below the lowest melting point or initial melting temperature of (a) and (b); 2) compressing and shaping the paste while preventing or substantially preventing melting of solids used in forming the paste, to produce a wet compacted composition in granular form; and 3) drying said wet compacted composition in granular form by vaporizing said processing solvent therefrom to form the dried compacted particulate polymer additive composition in a granular form; with the proviso that the paste of 1) is devoid of any extraneous component serving as a binder.