Composition for coating substrate to prevent sticking

Details Composition for coating substrate to prevent sticking Composition for coating substrate to prevent sticking

C - Chemistry, Metallurgy

08

L

C08L 25/10 (2006.01) C09D 125/10 (2006.01) C10M 107/12 (2006.01) C10M 107/14 (2006.01) C10M 107/16 (2006.01)

Patent

CA 2627326

A release agent composition to prevent sticking and facilitate separation of surfaces, such as patterns and core boxes from foundry molds and cores comprises (a) a styrene-diene block copolymer; (b) a functional silicone; (c) a solvent; and optionally, one or both of (d) a catalyst and (e) a crosslinking agent. Further is provided a method to facilitate separation of a workpiece from a substrate comprising applying the release agent composition to a surface of the workpiece, the substrate or both. In one particular embodiment, the method improves the release of a mold or a core from a pattern or a core box.

L~invention concerne une composition d~agent de libération destinée à éviter le collage et à faciliter la séparation de surfaces, telles que des motifs et des boîtes à noyau de noyaux et de moules de fonderie, ladite composition comprenant (a) un copolymère séquencé styrène-diène ; (b) une silicone fonctionnelle ; (c) un solvant ; et éventuellement un ou deux composants parmi (d) un catalyseur et (e) un agent de réticulation. L~invention concerne également un procédé destiné à faciliter la séparation d~une pièce travaillée d~un substrat comprenant l~application de la composition d~agent de libération à une surface de la pièce travaillée, du substrat ou des deux. Selon un mode de réalisation particulier, le procédé améliore la libération d~un moule ou d~un noyau d~un motif ou d~une boîte à noyau.

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