A photocurable composition for stereolithographic three-dimensional printing, wherein the photocurable composition comprises a photoreactive oligomer component comprising a hydrophobic oligomer comprising a photoreactive end group, a photoreactive monomer component comprising a photoreactive monomer having a photoreactive end group, and a photoinitiation composition comprising a photoinitiator; the photocurable composition has a viscosity of 250 to 10,000 centipoise at 22 C., determined using a Brookfield viscometer; and the photocured composition has a dielectric loss of less than 0.010, preferably less than 0.008, more preferably less than 0.006, most preferably less than 0.004, each determined by split-post dielectric resonator testing at 10 gigahertz at 23 C.

A photocurable composition for stereolithographic three-dimensional printing, wherein the photocurable composition comprises a photoreactive oligomer component comprising a hydrophobic oligomer comprising a photoreactive end group, a photoreactive monomer component comprising a photoreactive monomer having a photoreactive end group, and a photoinitiation composition comprising a photoinitiator; the photocurable composition has a viscosity of 250 to 10,000 centipoise at 22 C., determined using a Brookfield viscometer; and the photocured composition has a dielectric loss of less than 0.010, preferably less than 0.008, more preferably less than 0.006, most preferably less than 0.004, each determined by split-post dielectric resonator testing at 10 gigahertz at 23 C.

A polymerizable liquid crystal compound represented by formula (1). In formula (1), A.sup.1 is 1,4-phenylene, 1,4-cyclohexylene, 1,4-cyclohexenylene, pyridine-2,5-diyl, 1,3-dioxane-2,5-diyl or naphthalene-2,6-diyl, Z.sup.1 is a connecting group, m and n are independently an integer from 0 to 5, in which an expression: 1m+n8 holds, X.sup.1 is alkylene having 1 to 5 carbons, in which an atom thereof may be replaced by a hetero atom, and at least one of R.sup.1 is a polymerizable functional group. ##STR00001##

A polymerizable liquid crystal compound represented by formula (1). In formula (1), A.sup.1 is 1,4-phenylene, 1,4-cyclohexylene, 1,4-cyclohexenylene, pyridine-2,5-diyl, 1,3-dioxane-2,5-diyl or naphthalene-2,6-diyl, Z.sup.1 is a connecting group, m and n are independently an integer from 0 to 5, in which an expression: 1m+n8 holds, X.sup.1 is alkylene having 1 to 5 carbons, in which an atom thereof may be replaced by a hetero atom, and at least one of R.sup.1 is a polymerizable functional group. ##STR00001##

An acetylacetone derivative is useful for capturing a metal element by complexation. A convenient and very versatile synthesis method can be used to synthesize the derivative. The derivative can have the following formula: ##STR00001##

An acetylacetone derivative is useful for capturing a metal element by complexation. A convenient and very versatile synthesis method can be used to synthesize the derivative. The derivative can have the following formula: ##STR00001##

The present invention relates to latex particles for measurement reagents, said latex particles having a coefficient of variation in particle diameters of 10% or less and an average particle diameter of 250 to 1000 nm. Each of the latex particles contains 20% by weight or more of a compound having a refractive index of 1.60 or more. The depth of a supernatant is 5 mm or less when a liquid dispersion having a solid matter concentration of 1% by weight, which is prepared by dispersing the latex particles in ultrapure water, is placed in a tubular 10-ml measuring cylinder having a body inner diameter of 10.8 mm and is then allowed to leave for 10 days. According to the particles, a measurement of a measurement sample can be performed at a high sensitivity even when the concentration of a substance to be tested in the measurement sample is low.

The present invention relates to latex particles for measurement reagents, said latex particles having a coefficient of variation in particle diameters of 10% or less and an average particle diameter of 250 to 1000 nm. Each of the latex particles contains 20% by weight or more of a compound having a refractive index of 1.60 or more. The depth of a supernatant is 5 mm or less when a liquid dispersion having a solid matter concentration of 1% by weight, which is prepared by dispersing the latex particles in ultrapure water, is placed in a tubular 10-ml measuring cylinder having a body inner diameter of 10.8 mm and is then allowed to leave for 10 days. According to the particles, a measurement of a measurement sample can be performed at a high sensitivity even when the concentration of a substance to be tested in the measurement sample is low.

A preparation method of vinyl ester resin for optimizing heat-release during curing includes: (A) providing a vinyl ester, a solvent and a phase change material to perform mixture; (B) performing a heating process to remove the solvent, so as to obtain a vinyl ester resin containing the phase change material. Thereby, the organic PCM material with high heat absorption and good resin affinity can be used as the temperature control agent of the vinyl ester resin during the curing process for avoiding the defects such as bubbles and cracks being generated in the vinyl ester resin.

Described herein are articles and methods of making articles, including a transparent composite film having a fiber filler embedded in a polymer network. The polymer network of the transparent composite film is a cured, cross-linked matrix including a first and second structure segment. The structure segments may contribute or impart improved properties in the transparent composite film. The select structure segments can provide increased modulus and reduced glass transition temperature thereby allowing for a desirable balance of flexibility and rigidity in the transparent composite film. The improved transparent composite film is suitable for many applications including use in display devices.