Planar structure made of renewable materials

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/18 (2006.01) B32B 5/22 (2006.01) C08G 59/34 (2006.01) C09D 163/08 (2006.01) C09D 171/02 (2006.01)

Patent

CA 2204609

The invention discloses a planar structure composed of at least one carrier layer (I) and at least one transparent cover coat (II); an optional back coat (III) arranged under the carrier coat (I) and made of a chemically or mechanically foamed expanded layer; and an optional compact or priming coat (IV) arranged between carrier layer (I) and cover coat (II) and/or between carrier layer (I) and back coat (III), wherein the coating compounds for the layers (II), (III), (IV) can be manufactured from a combination of: a) epoxidized products of esters of unsaturated fatty acids having a chain length of C8 to C22 with multi valent aliphatic alcohols containing 2 through 6 carbon atoms; and which contain more than one epoxy group per molecule on average; and b) sub-esters of polycarboxylic acids with polyetherpolyols that contain at least one free carboxylic acid group per molecule and a double bond; c) optionally, a hydrophobing agent; and d) optionally, further additives from the group consisting of fillers, pigments, expanders and , auxiliary substances; whereinby the constituents, (a) and (b) are employed in a weight ratio of 0.6:1 to 1:1.4.

Une structure plate comprend au moins une couche de support (I) et au moins une couche transparente d'enduit (II), le cas échéant une couche inférieure (III) en un matériau alvéolaire chimiquement ou mécaniquement moussé sous la couche de support (I), et le cas échéant un apprêt de base (IV) situé entre la couche de support (I) et l'enduit transparent (II) et/ou entre la couche de support (I) et la couche inférieure (III). Les enduits qui constituent les couches (II), (III) et (IV) contiennent une combinaison (a) des produits d'époxydation d'esters d'acides gras insaturés ayant une chaîne de 8 à 22 carbones de longueur avec des alcools aliphatiques polyvalents contenant entre 2 et 6 carbones et en moyenne plus d'un groupe époxyde par molécule; et (b) des esters partiels d'acides polycarboxyliques avec des polyols de polyéther qui contiennent au moins un groupe carboxylique libre par molécule et une liaison double; (c) le cas échéant un agent imperméabilisant et (d) le cas échéant d'autres additifs du groupe des matières de charge, des pigments, des agents gonflants et des adjuvants. Le rapport en poids entre les composants (a) et (b) est compris entre 0,6:1 et 1:1,4.

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