Disclosed herein is a 2K coating system consisting of two components (A) and (B) being separate from each other, where (A) includes at least one constituent (a1) containing at least one aromatic moiety and bearing on average at least two primary and/or secondary amino groups, where (B) includes at least one constituent (b1) containing at least one aromatic moiety and bearing on average at least two isocyanate groups, where each of (A) and (B) has a solid content of at least 95 wt.-%, based on the total weight of the respective component, and constituent (b1) present in component (B) bears carbodiimide and/or uretonimine units and at least one structural unit (I). Also disclosed herein are a coating composition obtainable by mixing components (A) and (B), a method of using said coating composition as sealant, a method of applying the coating composition to a substrate, and a sealed substrate.

Disclosed herein is a 2K coating system consisting of two components (A) and (B) being separate from each other, where (A) includes at least one constituent (a1) containing at least one aromatic moiety and bearing on average at least two primary and/or secondary amino groups, where (B) includes at least one constituent (b1) containing at least one aromatic moiety and bearing on average at least two isocyanate groups, where each of (A) and (B) has a solid content of at least 95 wt.-%, based on the total weight of the respective component, and constituent (b1) present in component (B) bears carbodiimide and/or uretonimine units and at least one structural unit (I). Also disclosed herein are a coating composition obtainable by mixing components (A) and (B), a method of using said coating composition as sealant, a method of applying the coating composition to a substrate, and a sealed substrate.

Laminated parts are described that include a core, a fiber layer arranged on each side of the core and impregnated with a polyurethane resin, and an outer layer that at least partially coats at least one of the polyurethane impregnated fiber layers, in which the outer layer is the cured reaction product of a reaction mixture that includes: (1) a polyisocyanate, (2) a polyether polyol having a molecular weight of 800 Da to 25,000 Da and a functionality of 2 to 8, and (3) a fatty acid ester having isocyanate-reactive functionality. Methods of producing such laminated parts are also described.

Some variations provide a multiphase polymer composition comprising a first polymer material and a second polymer material that are chemically distinct, wherein the first polymer material and the second polymer material are microphase-separated on a microphase-separation length scale from about 0.1 microns to about 500 microns, wherein the multiphase polymer composition comprises first solid functional particles selectively dispersed within the first polymer material, and wherein the first solid functional particles are chemically distinct from the first polymer material and the second polymer material. Some embodiments provide an anti-corrosion composition comprising first corrosion-inhibitor particles or precursors selectively dispersed within the first polymer material, wherein the multiphase polymer composition optionally further comprises second corrosion-inhibitor particles or precursors selectively dispersed within the second polymer material. These multiphase polymer compositions may be used for other applications, such as self-cleaning, self-healing, or flame-retardant coatings. Methods of making and using these multiphase polymer compositions are disclosed.

A method for preparing a novel waterborne polyurethane foam layer for synthetic leather is disclosed. The method includes first preparing a charged cellulose nanofiber by using a wood pulp as a raw material; meanwhile, subjecting a polyisocyanate, a macromolecular diol, a hydrophilic chain extender and a small molecular chain extender to a polyaddition reaction and an acid-base neutralization reaction in sequence, to obtain a cationic or anionic waterborne polyurethane; adding the charged cellulose nanofiber and a certain amount of a crosslinking agent to the oppositely charged ionic waterborne polyurethane emulsion, stirring the resulting mixture, forming a bimolecular layer at the gas/liquid interface by a self-assembly of the cellulose nanofiber and waterborne polyurethane nanoparticles through electrostatic interactions to obtain a stable Pickering foam; using the stable Pickering foam as a template, drying and solidifying to obtain the waterborne polyurethane foam layer for synthetic leather.

A method for preparing a novel waterborne polyurethane foam layer for synthetic leather is disclosed. The method includes first preparing a charged cellulose nanofiber by using a wood pulp as a raw material; meanwhile, subjecting a polyisocyanate, a macromolecular diol, a hydrophilic chain extender and a small molecular chain extender to a polyaddition reaction and an acid-base neutralization reaction in sequence, to obtain a cationic or anionic waterborne polyurethane; adding the charged cellulose nanofiber and a certain amount of a crosslinking agent to the oppositely charged ionic waterborne polyurethane emulsion, stirring the resulting mixture, forming a bimolecular layer at the gas/liquid interface by a self-assembly of the cellulose nanofiber and waterborne polyurethane nanoparticles through electrostatic interactions to obtain a stable Pickering foam; using the stable Pickering foam as a template, drying and solidifying to obtain the waterborne polyurethane foam layer for synthetic leather.

A photoresponsive polyurethane including a hard segment, a soft segment, and a photoresponsive group that is selected from a coumarin group or a coumarin derivative and an alkoxyphencyl group or an alkoxyphencyl.

A photoresponsive polyurethane including a hard segment, a soft segment, and a photoresponsive group that is selected from a coumarin group or a coumarin derivative and an alkoxyphencyl group or an alkoxyphencyl.

The present disclosure relates to an aqueous fire-retardant composition comprising particles dispersed in an aqueous phase, wherein the particles comprise a fire-retardant brominated epoxy polymer and an organic polymer comprising ionic dispersing groups. The present disclosure further relates to an aqueous fire-retardant coating composition comprising such fire-retardant composition, and to a substrate coated with a coating deposited from such coating composition.

The present disclosure relates to an aqueous fire-retardant composition comprising particles dispersed in an aqueous phase, wherein the particles comprise a fire-retardant brominated epoxy polymer and an organic polymer comprising ionic dispersing groups. The present disclosure further relates to an aqueous fire-retardant coating composition comprising such fire-retardant composition, and to a substrate coated with a coating deposited from such coating composition.