C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/40 (2006.01) B29C 67/24 (2006.01) C08G 18/34 (2006.01) C08G 18/42 (2006.01) C08G 18/66 (2006.01) C08K 5/101 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2434458
Foamed molded articles, produced by reaction injection molding (RIM), are provided. The molded articles are formed by reaction of a polyisocyanate component with an isocyanate reactive component in a mold, using a blowing agent. The molded articles are preferably composites, formed in the presence of a fibrous reinforcing material. The foamed articles are characterized by relatively short minimum mold residence times, and can thereby be produced more economically than prior art composites. The foamed articles are further characterized by a reduction in physical defects, such as splits and voids.
La présente invention concerne des articles moulés expansés, fabriqués par réaction et moulage par injection (R.M.I). Lesdits articles moulés sont formés en faisant réagir un composant polyisocyanate avec un composant réactif isocyanate dans un moule, au moyen d'un agent d'expansion. Les articles moulés sont de préférence des composites, formés en présence d'une matière de renforcement fibreuse. Les articles expansés sont caractérisés par des temps de séjour en moule relativement courts et peuvent ainsi être produits de manière plus économique que les composites antérieurs. Les articles expansés sont, de plus, caractérisés par une réduction des défauts physiques, tels que les fissures et les vides.
Bareis David W.
Gillis Herbert R.
Shidaker Trent A.
Bareis David W.
Gillis Herbert R.
Huntsman International Llc
Shidaker Trent A.
Smart & Biggar
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