A fabrication method and application of topological elastomers with highly branched structures, low modulus and high elasticity. The topological elastomers comprise dendritic macromolecules. The fabrication method includes direct crosslinking, post-crosslinking, grafting, and copolymerization. The performance of the elastomer can be easily tuned via changing the topology of the polymer network. The breakthrough of this invention lies in that these topological elastomers with highly branched structures are having low modulus and high elasticity, which would expand its application in the field of elastomer. Notably, the variety of topological elastomers, the versatility of curing chemistries, the availability of a wide variety of monomers, and the various polymerization methods are enabling the fabrication of topological elastomers with feasibility and efficiency.

A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.

A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.

A method of making an infrared-reflecting optically transparent assembly comprises: coating a curable composition onto a major surface of an optically transparent thermoplastic polymer film; at least partially curing the curable composition, which may be optionally at least partially dried, to provide a thermoformable composite film; and laminating the thermoformable composite film to an infrared-reflecting multilayer optical film to provide the infrared-reflecting optically transparent assembly. The curable composition comprises urethane (meth)acrylate compound, (meth)acrylate monomer, and silicone (meth)acrylate. The infrared-reflecting optically transparent assembly and methods of including it in an infrared-reflecting lens assembly are also disclosed.

A method of making an infrared-reflecting optically transparent assembly comprises: coating a curable composition onto a major surface of an optically transparent thermoplastic polymer film; at least partially curing the curable composition, which may be optionally at least partially dried, to provide a thermoformable composite film; and laminating the thermoformable composite film to an infrared-reflecting multilayer optical film to provide the infrared-reflecting optically transparent assembly. The curable composition comprises urethane (meth)acrylate compound, (meth)acrylate monomer, and silicone (meth)acrylate. The infrared-reflecting optically transparent assembly and methods of including it in an infrared-reflecting lens assembly are also disclosed.

The disclosure provides a quantum dot composition, a quantum dot luminescent material, a preparation method thereof and a light-emitting device containing the same. The quantum dot composition includes a microemulsion, a polymer precursor dispersing the microemulsion, wherein the microemulsion includes quantum dots, a dissolution medium dissolving the quantum dots, and an emulsifier encapsulating the dissolution medium.

A resin composition comprises a base resin containing a urethane (meth)acrylate oligomer, a monomer and a photopolymerization initiator, and a hydrophobized spherical inorganic oxide, wherein the inorganic oxide is dispersed in the resin composition and a content of the inorganic oxide is 1 to 60% by mass based on a total amount of the resin composition.

A resin composition comprises a base resin containing a urethane (meth)acrylate oligomer, a monomer and a photopolymerization initiator, and a hydrophobized spherical inorganic oxide, wherein the inorganic oxide is dispersed in the resin composition and a content of the inorganic oxide is 1 to 60% by mass based on a total amount of the resin composition.

The optical fiber comprises a glass fiber comprising a core and a cladding, a primary resin layer in contact with the glass fiber and covering the glass fiber, and a secondary resin layer covering the primary resin layer, wherein the primary resin layer contains a cured product of a resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and an aromatic acid compound, a content of the aromatic acid compound is 20 ppm or more and 12000 ppm or less based on a total amount of the resin composition, and Young's modulus of the primary resin layer is 0.6 MPa or less at 23° C.±2° C.

There is provided a radiation-curable resin composition for formation of a primary covering layer, the radiation-curable resin composition being able to form a cured layer having excellent flexibility and adequate mechanical strength.

A radiation-curable resin composition for formation of a primary covering layer of an optical fiber, comprising a urethane oligomer, a polymerization initiator and a free-radically polymerizable non-urethane monomer, the urethane oligomer being the reaction product of a polyether-based urethane prepolymer and an isocyanate reactive compound containing one active hydrogen group, the isocyanate reactive compound containing an aliphatic alcohol and an ethylenic unsaturated group-containing isocyanate reactive compound, and the aliphatic alcohol content in the isocyanate reactive compound being 24 mol % or higher.