This invention provides a method for forming a multilayer coating film, comprising applying a base paint (X) having a solids content ratio of 30 to 62 mass % to a substrate to form a base coating film having a cured film thickness of 6 to 45 μm; applying an effect pigment dispersion (Y) having a solids content ratio of 0.1 to 10 mass % to the base coating film to form an effect coating film having a cured film thickness of 0.1 to 5.0 μm; applying a two-component clear paint (Z) containing a hydroxy-containing resin and a polyisocyanate compound to the effect coating film to form a clear coating film; and heating the base coating film, the effect coating film, and the clear coating film to simultaneously cure these coating films; wherein the base paint (X) contains a polyurethane resin (A), an alcohol (B) containing 6 to 12 carbon atoms, and an organic solvent (C) having an HLB of 7 to 9, and the effect pigment dispersion (Y) contains water, a flake-effect pigment (P), a resin emulsion (Q), and cellulose nanofibers (R).

The present invention relates to a flame-retardant composition, a method for preparing the same and an article therefrom. The composition may include at least one thermoplastic polyurethane, at least one primary flame retardant, and at least one metal carbonate particle.

Provided herein is an additive manufacturing method of making a three-dimensional object comprising polyurea, comprising: (a) dispensing a one part (1K) dual cure resin into a stereolithography apparatus, the resin comprising or consisting essentially of a photoinitiator, a reactive blocked polyisocyanate, and optionally a polyepoxide, the reactive blocked polyisocyanate comprising the reaction product of a polyisocyanate and an amine or hydroxyl (meth)acrylate or (meth)acrylamide monomer blocking agent; (b) additively manufacturing from said resin an intermediate object comprising the light polymerization product of said reactive blocked polyisocyanate; (c) optionally cleaning said intermediate object; and (d) reacting said polymerization product in said intermediate with water to generate polyamine in situ that sequentially reacts with the remainder of the polymerization product to form urea linkages and hereby produce a three-dimensional object comprising polyurea. One part (1K) dual cure resins useful for the method are also provided.

Provided is a technology for exhibiting good ant ithrombogenicity.

A polyurethane or polyurethane urea has a graft chain having a specific structure. Two functional groups included in the specific structure are each an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms and may be the same or different from each other.

A waterborne one-component coating composition capable of self-crosslinking and exhibiting a gloss and hardness improvement when cured that is similar to a solventborne two-component composition. The composition includes a urethane phase including a polyurethane polymer with at least polyester diol monomer units, polycarbonate diol monomer units, and ketone-functionalized diol monomer units. The composition may include an optional acrylic phase including an acrylic polymer having monomer units selected from one of alkyl (meth)acrylate monomer units, vinyl acetate monomer units, styrene monomer units, ketone-functional vinyl monomer units, or combinations thereof. The composition includes a hydrazine-functionalized crosslinking agent configured to crosslink one of the ketone-functionalized diol monomer units, the ketone-functional vinyl monomer units, or both. The composition further includes one or more tertiary amine reaction moderators or neutralizing agents.

Provided are a waterborne polyurethane emulsion for ultra-thin polyurethane condoms having a low modulus and a high strength, and a method for preparing the emulsion, wherein the waterborne polyurethane emulsion comprises 15 to 18 parts by mass of a macromolecular diol, 4 to 6 parts by mass of a diisocyanate, 0.6 to 0.9 parts by mass of a hydrophilic chain extender, 0.4 to 0.8 parts by mass of a small-molecule chain extender, and the like. The prepared waterborne polyurethane emulsion is characterized by a low modulus, a high strength, and high resilience.

An embodiment includes a platform shape memory polymer system. Such an embodiment exhibits a blend of tunable, high performance mechanical attributes in combination with advanced processing capabilities and good biocompatibility. A post-polymerization crosslinking synthetic approach is employed that combines polyurethane and thiol-ene synthetic processes. Other embodiments are described herein.

A liquid dressing includes a solvent and a film-forming polymer that is dissolved in the solvent and that is made by a process including: providing an alkoxy group-containing silicone resin which is obtained by subjecting an orthosilicate compound and an acidic aqueous solution to a hydrolysis and polymerization reaction; providing an isocyanate group-containing prepolymer which is obtained by reacting a diisocyanate compound with a hydrophilic polyether diol; and subjecting the alkoxy group-containing silicone resin and the isocyanate group-containing prepolymer to a polymerization reaction so as to obtain the film-forming polymer.

Medical articles formed from a polyurethane-based resin including a modifying oligomer provide enhanced properties. A modifying oligomer incorporated into a backbone, as a side chain, or both of the polyurethane-based resin formed by a diisocyanate, a polyglycol, and a diol chain extender has at least one, preferably two, alcohol moieties (C—OH) and a functional moiety. Exemplary modifying oligomers are: a diol-containing perfluoropolyether incorporated into the backbone, a monofunctional polysiloxane (e.g., monodialcohol-terminated polydimethylsiloxane) incorporated as the side chain, and combinations thereof. Medical articles herein are self-lubricating and/or anti-fouling.

The invention relates to polycarbodiimides and to a process for their preparation using special catalysts.