C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/02 (2006.01) C08J 11/04 (2006.01) C08K 3/34 (2006.01) C08L 19/00 (2006.01) C08L 21/00 (2006.01)
Patent
CA 2263118
Polymeric composites are described that can be formed into articles of construction to replace similar articles formed of wood and concrete. The composites comprise a polymer component comprising polyolefins preferably obtained as waste or recycle; a rubbery polymeric component preferably obtained from disposed tires; and a reinforcing filler component comprising mica. The mica is preferably of the expanded variety to allow for a reduction in density over similar composites containing traditional mica. The evaporation of volatile compounds initially contained within the different components, primarily the rubbery polymeric component, allows for the production of articles of construction having a foamed inner core in which the foamed cell structure has not been achieved through the use of traditional CO2 generating foaming agents. Processes for forming the articles of construction are provided that include both extrusion and molding techniques.
L'invention concerne des composites polymères qui peuvent être formés pour donner des articles de construction pouvant remplacer des articles similaires en bois et béton. Lesdits composites comprennent un composant polymère contenant les éléments suivants: des polyoléfines, obtenues de préférence à partir de déchets ou de produits recyclés; un composant polymère caoutchouteux obtenu de préférence à partir de pneus mis au rebut; et une charge de renforcement contenant du mica. Le mica est de préférence expansé afin que la densité desdits composites soit inférieure à celle de composites similaires contenant du mica classique. L'évaporation des composés volatils contenus initialement dans les différents composants - surtout le composant polymère caoutchouteux -, permet la fabrication d'articles de construction ayant un noyau intérieur en mousse alvéolaire dont la structure n'a pas été obtenue par l'action d'agents d'expansion classiques émettant du CO2. L'invention concerne également des procédés de formation d'articles de construction, qui comprennent des techniques d'extrusion et de moulage.
Mack Wolfgang A.
Sullivan Henry W.
American Tietek Llc
Mcfadden Fincham
Tietek Inc.
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