Topcoat layer, a lamination film containing the same, and a decorative article decorated by said lamination film
AssigneeBASF Coatings GmbH
InventorsEtsumi Ito, Takeshi Tsunoda, Hideki Yamashita, Hideki Suetsugu
Life of this patent
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Abstract
Disclosed herein is a topcoat layer (A) having a total elongation and pencil hardness in a specific range in the temperature range of from 20 to 120° C., which is formed by applying a coating of coating material (D) including essential components acrylic polymer (B), which includes a hydroxyl group and has a glass transition temperature of a specific range; polyisocyanate (C); and a solvent. Further disclosed herein are a lamination film (H) where the topcoat is laminated over a base material, and a decorative article (I) decorated by the lamination film.
Claims12
A topcoat layer (A) satisfying below conditions (1) to (3):
- is formed by applying a coating of a coating material (D) comprising essential components acrylic polymer (B), which includes a hydroxyl group and has a glass transition temperature of from −50° C. to 30° C.;
- a polyisocyanate (C);
- and a solvent;
- has a total elongation of 3% or greater in the temperature range of from 20 to 120° C.;
- has a pencil hardness of 6B or higher measured in accordance with ISO 15184,
- wherein the acrylic polymer (B) is a copolymer of a hydroxyl group containing monomer (a) and another monomer (c), or of a hydroxyl group-containing monomer (a), a carboxyl group-containing monomer (b) and other monomer (c),
- wherein the copolymer is composed of two or more of the hydroxyl group containing monomer (a) selected from the group consisting of 2-hydroxyethyl acrylate (HEA), 2-hydroxyethyl methacrylate (HEMA), 2-hydroxy propyl acrylate (HPA), 2-hydroxypropyl methacrylate (HPMA), 4-hydroxybutyl acrylate (4-HBA), and glycerol monomethacrylate, and
- wherein the polyisocyanate (C) is one or more species selected from the group consisting of a biuret, isocyanurate, adduct, uretdione, and allophanate of a compound having two or more isocyanate groups within the molecule.
Dependencies are inferred from the claim text.