The disclosed technology provides improved thermoset vitrimers. It has been discovered that by incorporating adaptable dynamic groups along the polymer backbone, along with permanent, non-dynamic crosslinking points, an improved thermoset vitrimer is generated. In some variations, a thermoset vitrimer comprises: a linear polymer backbone containing associative dynamic covalently bonded species; a crosslinked network containing non-dynamic branch points; and non-dynamic species between non-dynamic branch points and terminal ends of the linear polymer backbone. Some methods comprise: reacting a linear prepolymer with an amine-containing species to form an amine-terminated linear prepolymer; reacting the amine-terminated linear prepolymer with an isocyanate-containing species to form an isocyanate-endcapped linear prepolymer; mixing the isocyanate-endcapped linear prepolymer with a reactive crosslinking agent having a crosslinking functionality of at least 3; and curing the isocyanate-endcapped linear prepolymer with the reactive crosslinking agent, thereby forming a thermoset vitrimer. Experimentally produced thermoset vitrimers demonstrate the ability for self-repair at elevated temperature.

A curable composition set containing: a first liquid containing an oxidizing agent; and a second liquid containing a reducing agent, wherein at least one of the first liquid and the second liquid contains a compound represented by the following formula (1):

##STR00001##

wherein R.sup.11 and R.sup.12 each independently represent a hydrogen atom or a methyl group, and R.sup.13 represents a divalent group having a polyoxyalkylene chain, and wherein at least one of the first liquid and the second liquid contains a thermally conductive filler.

The present disclosure provides for a metal chelated polyol liquid and/or a metal chelated polyether polyol liquid that can be used in an isocyanate-reactive composition and a reaction mixture for forming a polyurethane polymer. The metal chelated polyester polyol liquid is a reaction product of a chelating polyester polyol having a chelating moiety and a metal compound having a metal ion. The metal chelated polyether polyol liquid is a reaction product of a chelating polyether polyol having a chelating moiety and a metal compound having a metal ion. The chelating moiety of the chelating polyester polyol or the chelating polyether polyol chelates the metal ion to form the metal chelated polyester polyol liquid or the metal chelated polyether polyol liquid, respectively, having a mole ratio of the metal ion to the chelating moiety of 0.05:1 to 2:1.

The invention relates to an aqueous dispersion of a carboxyl-functional, unsaturated polyester containing a perfluoropolyether block prepared by the following steps: a) subjecting a carboxyl-terminated perfluoropolyether C to a reaction with an ethylenically unsaturated epoxy-functional compound D in the presence of compound E, which is a carboxylic acid or anhydride with functionality of at least 2, to obtain carboxyl-functional, unsaturated polyester F, b) neutralizing carboxyl-functional, unsaturated polyester F with a neutralizer G and dispersing it in water. The dispersion can be used to prepare a waterborne, UV-curable coating composition and used for easy-clean coatings for various substrates.

Provided is a semiconductor nanoparticle complex in which a ligand is coordinated to a surface of a semiconductor nanoparticle. The semiconductor nanoparticle is a core-shell type semiconductor nanoparticle including a core containing In and P and one or more layers of shells. The semiconductor nanoparticle further includes halogen and the molar ratio of halogen to In is 0.80 to 15.00 in terms of atoms. The ligand includes one or more kinds of mercapto fatty acid esters represented by the following general formula: HS—R.sub.1—COO—R.sub.2. The mercapto fatty acid ester has an SP value of 9.20 or more. The mercapto fatty acid ester has a molecular weight of 700 or less, and the average SP value of the entire ligand is 9.10 to 11.00. The present invention provides a semiconductor nanoparticle complex dispersible at a high mass fraction in a polar dispersion medium while keeping high fluorescence quantum yield.

The present invention relates to a process for direct production of mixtures of short-chain high-functionality polyoxyalkylene polyols and long-chain low-functionality polyoxyalkylene polyols. The short-chain high-functionality polyoxyalkylene polyol component is obtained by alkylene oxide addition onto high-functionality H-functional starter compounds while the long-chain low-functionality polyoxyalkylene polyol component is correspondingly obtained by alkylene oxide addition onto low-functionality H-functional starter compounds. The invention further relates to the resulting polyoxyalkylene polyols and to the reaction thereof to produce polyurethanes.

A polymer electrolyte including a poly(ethylene oxide) (PEO) containing polymer; and a lithium salt, wherein a terminal of the poly(ethylene oxide) containing polymer is substituted with a sulfur compound functional group, a nitrogen compound functional group or a phosphorus compound functional group, and a method for preparing the same and a battery containing the same.

Provided herein are water-soluble prodrugs, compositions comprising such prodrugs, and related methods of making and administering the same. The prodrugs of the invention comprise a water-soluble polymer having three or more arms, at least three of which are typically covalently attached to an active agent, e.g., a small molecule. The conjugates of the invention provide an optimal balance of polymer size and structure for achieving improved drug loading, since the conjugates of the invention possess three or more active agents releasably attached to a multi-armed water-soluble polymer. The prodrugs of the invention are therapeutically effective, and exhibit improved properties in-vivo when compared to unmodified parent drug.

Provided herein are polymeric α-hydroxy aldehyde or α-hydroxy ketone reagents which can be conjugated to amine-containing compounds to form stable conjugates in a single-step reaction. In selected embodiments, the polymeric reagent itself incorporates an internal proton-abstracting (basic) functional group, to promote more efficient reaction. The substituent is appropriately situated, via a linker if necessary, to position the group for proton abstraction, preferably providing a 4- or 5-bond spacing between the abstracting atom and the hydrogen atom on the α-carbon. Also provided are methods of using the reagents and stable, solubilized conjugates of the reagents with biologically active compounds. In preferred embodiments, the polymeric component of the reagent or conjugate is a polyethylene glycol.

This disclosure provides improved lipid-based compositions, including lipid nanoparticle compositions, and methods of use thereof for delivering agents in vivo including nucleic acids and proteins. These compositions are not subject to accelerated blood clearance and they have an improved toxicity profile in vivo.