Synthetic leather article and method for preparing the same
AssigneeDow Global Technologies LLC
InventorsXiangyang Tai, Chao Zhang, Jiawen Xiong, Ray E. Drumright
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Abstract
A synthetic leather article comprising a top coating derived from externally emulsified PUD and a 2K non-solvent PU foam is provided. The leather article exhibits high delamination resistance while retaining superior mechanical properties and appearance comparable with those derived from the organic solvent-based PU. A method for preparing the synthetic leather article is also provided.
Claims13
A synthetic leather article, comprising, from top to bottom:
- (A) a top coating layer derived from an externally emulsified polyurethane dispersion, wherein the externally emulsified polyurethane dispersion comprising one or more external emulsifiers and a first externally emulsified polyurethane derived from (Ai) one or more first isocyanate components comprising at least two isocyanate groups, and (Aii) one or more first isocyanate-reactive components comprising at least two isocyanate-reactive groups, wherein the external emulsifiers or the residual moieties thereof are not covalently attached to the backbone chain of the first polyurethane;
- (B) a polyurethane foam layer comprising a second foamed polyurethane derived from a solvent-free system comprising (Bi) one or more second isocyanate components, (Bii) one or more second isocyanate-reactive components, and (Biii) one or more foaming agents;
- and
- (C) a backing substrate.
The use of an externally emulsified polyurethane dispersion as top coating layer in a synthetic leather article, wherein the synthetic leather article comprises:
- (A) a top coating layer derived from an externally emulsified polyurethane dispersion, wherein the externally emulsified polyurethane dispersion comprising one or more external emulsifiers and particles of a first polyurethane derived from (Ai) one or more first isocyanate components comprising at least two isocyanate groups and (Aii) one or more first isocyanate-reactive components comprising at least two isocyanate-reactive groups, dispersed in an aqueous solvent, wherein the external emulsifiers or the residual moieties thereof are not covalently attached to the backbone chain of the first polyurethane;
- (B) a polyurethane foam layer comprising a second foamed polyurethane derived from a solvent-free system comprising (Bi) one or more second isocyanate components, (Bii) one or more second isocyanate-reactive components, and (Biii) one or more foaming agents;
- and
- (C) a backing substrate;
- wherein the top coating layer directly contacts with the polyurethane foam layer.
Dependencies are inferred from the claim text.