Internal mold release for low density reaction injection...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 75/04 (2006.01) C08G 18/36 (2006.01) C08G 18/66 (2006.01) C08J 5/00 (2006.01) C08J 9/04 (2006.01) C08K 5/09 (2006.01) C08L 91/00 (2006.01)

Patent

CA 2339632

A method for preparing a molded polyurethane foam article using an internal mold release composition is provided. More specifically, a method using an IMR agent and an IMR-enhancer compound to prepare a molded polyurethane foam article is provided. The method comprises (a) forming a polyurethane-forming mixture by mixing (i) a fatty acid condensation product, (ii) an IMR-enhancer compound, (iii) an isocyanate, (iv) a polyol, (v) a catalyst, and (vi) a blowing agent; (b) filling a mold with the polyurethane-forming mixture; (c) forming a molded foam article; and (d) removing the molded foam article from the mold. The IMR-enhancer compound is any liquid petroleum product within the viscosity range of products called oils.

L'invention concerne un procédé de préparation d'un article en mousse de polyuréthanne moulée à partir d'une composition de démoulage interne. L'invention concerne, en particulier, un procédé utilisant un agent de démoulage interne (IMR) et un composé favorisant le démoulage interne pour préparer un article en mousse de polyuréthanne moulée. Ledit procédé consiste (a) à former un mélange de formation de polyuréthanne en mélangeant (i) un produit de condensation d'acides gras, (ii) un composé favorisant le démoulage interne, (iii) un isocyanate, (iv) un polyol, (v) un catalyseur, et (vi) un agent de gonflement; (b) à remplir un moule avec ce mélange de formation de polyuréthanne; (c) à former un article en mousse moulée; et (d) à démouler l'article en mousse moulée. Le composé favorisant le démoulage interne peut être un quelconque produit liquide à base de pétrole dans la gamme de viscosité des produits généralement désignés huiles.

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