C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/14 (2006.01) C07C 5/03 (2006.01) C07C 13/10 (2006.01) C08J 9/34 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2305705
A process for the preparation of polyurethane containing molded articles having a compressed peripheral zone and a cellular core is provided. The novel integral skin flexible foams according to the present invention are formed using a very stable/homogeneous high purity cyclopentane or cyclopentane/iso- or n-pentane blend blowing agent component. The molded articles are produced by introducing into a mold a mixture which comprises: (a) an organic and/or modified organic polyisocyanate, (b) at least one higher molecular weight compound having at least two reactive hydrogen atoms, (c) optionally, a lower molecular weight chain extending agent and/or cross-linking agent, (d) a blowing agent comprising high purity cyclopentane, and (e) a catalyst capable of forming a molded article having a compressed peripheral zone and a cellular core, and allowing it to react.
L'invention concerne un procédé pour fabriquer des articles moulés contenant du polyuréthane qui possèdent une zone périphérique comprimée et un noyau cellulaire. Les nouveaux mousses souples à peau intégrée, fabriquées selon le procédé de cette invention, sont formées au moyen du cyclopentane pur très stable/homogène ou d'un composant gonflant à base du mélange cyclopentane/iso- ou n-pentane. On obtient les articles moulés en introduisant dans un moule et en faisant réagir un mélange qui comprend: (a) un polyisocyanate organique et/ou organique modifié; (b) au moins un composé à poids moléculaire élevé qui possède au moins deux atomes d'hydrogène réactifs; (c) éventuellement un agent d'extension de chaîne, de poids moléculaire plus faible, et/ou un agent de réticulation; (d) un gonflant qui comprend du cyclopentane pur et; (e) un catalyseur capable de former un article moulé possédant une zone périphérique comprimée et un noyau cellulaire.
Hampton Sherman W.
Merchant Philip Jr.
Borden Ladner Gervais Llp
Exxon Chemical Patents Inc.
Exxonmobil Chemical Patents Inc.
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