B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 9/10 (2006.01) B29B 9/12 (2006.01) C08F 8/20 (2006.01) C08J 3/12 (2006.01) C08K 3/00 (2006.01) C08K 5/03 (2006.01)
Patent
CA 2669906
Granules/pastilles of unadulterated brominated anionic styrenic polymer are prepared and provided. They are made by forming a downward plug flow from an orifice in a manifold or nozzle in proximity to a cooled traveling planar member. Such member is impervious to cooling liquid. There is a gap between the lower end of the orifice and the planar member. A portion of a plug of the molten polymer either (i) bridges such gap or (ii) freely drops from the orifice and falls upon the planar member, in either case forming an individual granule/pastille on the planar member and solidifies thereon. The traveling member is cooled by a mist or spray of cooling liquid applied to the underside of the planar member. The granules/pastilles have superior properties.
L'invention concerne des granules et des pastilles de polymère styrénique anionique bromé non altéré, fabriqués par formage d'un écoulement en bloc descendant, à partir d'un orifice d'un collecteur ou d'une buse à proximité d'un élément plan mobile refroidi. Un tel élément est étanche au liquide de refroidissement. Un intervalle est prévu entre l'extrémité inférieure de l'orifice et l'élément plan. Une portion d'un bloc de polymère fondu ou bien (i) comble un tel intervalle, ou bien (ii) s'écoule goutte à goutte librement de l'orifice, et tombe sur l'élément plan, en formant, dans un cas comme dans l'autre, un granule/pastille individuel sur cet élément plan et se solidifie sur celui-ci. L'élément mobile est refroidi par un brouillard ou un spray de liquide de refroidissement appliqué sur la face inférieure de l'élément plan. Les granules/pastilles présentent des propriétés supérieures.
Balhoff John F.
Herndon Robert C. Jr.
Luther Douglas W.
Peters Bruce C.
Albemarle Corporation
Macrae & Co.
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