Provided is a photo-curable composition capable of creating a three-dimensional object excellent in both of: stiffness and strength; and toughness. Specifically, provided is a photo-curable composition including: a blocked isocyanate represented by the general formula (1); a chain extender; and a photo-radical generator: ##STR00001##
wherein, in the general formula (1), A.sub.1 to A.sub.4 each independently represent a structure represented by the following general formula (2), and B represents a structure represented by the following general formula (3) ##STR00002##

A composition including at least one compound having a perfluoropolyether group and a curable site, wherein in a molecular weight distribution curve in gel permeation chromatography measurement, the following formula is satisfied: M2/M1≤3.5, wherein M1 is a molecular weight at a main peak, and M2 is a molecular weight at 25% intensity of an intensity of the main peak on a higher molecular weight side than M1. Also disclosed is a curable composition containing the composition and a method for producing the curable composition.

A composition including at least one compound having a perfluoropolyether group and a curable site, wherein in a molecular weight distribution curve in gel permeation chromatography measurement, the following formula is satisfied: M2/M1≤3.5, wherein M1 is a molecular weight at a main peak, and M2 is a molecular weight at 25% intensity of an intensity of the main peak on a higher molecular weight side than M1. Also disclosed is a curable composition containing the composition and a method for producing the curable composition.

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.

The present invention relates to polymerizable compositions which contain components that can be crosslinked both via isocyanurate bonds and by a radical reaction mechanism. The invention further relates to methods by way of which polymers can be produced from said compositions.

Radiation curable aqueous compositions (I) with reduced photo-yellowing are provided. Said composition comprises water, at least one ethylenically unsaturated compound and at least one carboxylic acid hydrazide-containing compound (H) in an amount sufficient to reduce photo-yellowing. Materials of the invention have the advantage that they help to reduce photo-yellowing. They may have a beneficial effect on long term yellowing caused by weathering too. Compositions (I) of the invention allow a better quality control of products and materials just after cure. Materials of the invention can be used to make coatings, inks, paints, varnishes and adhesives and they are further suitable for the making of composites, gel coats, 3D-curing and the making of 3D-objects in general.

Provided herein according to some embodiments is a dual cure additive manufacturing resin, comprising: (i) a light polymerizable component, (ii) a photoinitiator, (iii) a heat polymerizable component, and (iv) a non-reactive diluent, which resin is useful for the production of three-dimensional objects by additive manufacturing. Methods of using the same are also provided.

Provided is a prepeg resin composition, containing: a urethane (meth)acrylate (A) that is a reaction product of polyisocyanate (a1), polyol (a2), and hydroxy alkyl (meth)acrylate (a3); and a polymerization initiator (B), as an essential component, in which the polyisocyanate (a1) is at least one polyisocyanate selected from 2,4′-diphenyl methane diisocyanate, 4,4′-diphenyl methane diisocyanate, a carbodiimide modified product of 4,4′-diphenyl methane diisocyanate, and polymethylene polyphenyl polyisocyanate, and the polyol (a2) has an aromatic-ring and an oxyalkylene structure. The prepreg resin composition of the invention is excellent in workability and molding properties, and is capable of forming a molded article excellent in various physical properties such as external appearance and heat resistance, and thus, can be preferably used in a prepreg and a molded article thereof.

In an active energy ray-curable polyurethane resin including a reaction product of a resin material containing an isocyanate group-terminated prepolymer and a hydroxy group-containing unsaturated compound, the isocyanate group-terminated prepolymer includes a reaction product of a prepolymer material containing a polyisocyanate component containing a xylylene diisocyanate and/or a hydrogenated xylylene diisocyanate, and a polyol component containing a polyoxyalkylene polyol having a number average molecular weight of 6000 or more and 12000 or less, and the viscosity at 25° C. of the active energy ray-curable polyurethane resin is 20000 mPa.Math.s or more and 40000 mPa.Math.s or less.

A display device and an adhesive member are provided. A display device according to an embodiment of the present disclosure includes: a display panel; a cover window disposed on the display panel; and a first adhesive member disposed between the display panel and the cover window, in which the first adhesive member includes a urethane monomer, and the urethane monomer includes 2,6-diisopropylphenyl isocyanate (2,6-DIPPI) of about 5 wt % or more and about 10 wt % or less with respect to a total weight of the first adhesive member.