This disclosure relates to a dielectric film-forming composition that includes (a) at least one cyanate ester compound, the at least one cyanate ester compound containing at least two cyanate groups; and (b) at least one dielectric polymer including a polybenzoxazoie precursor polymer, a polyimide precursor polymer, or a fully imidized polyimide polymer.

This disclosure relates to a dielectric film-forming composition that includes (a) at least one cyanate ester compound, the at least one cyanate ester compound containing at least two cyanate groups; and (b) at least one dielectric polymer including a polybenzoxazoie precursor polymer, a polyimide precursor polymer, or a fully imidized polyimide polymer.

An anti-corrosive material includes an ultraviolet curable resin including, as a main component, a polymerizable compound including at least one of a photopolymerizable (meth)acrylate monomer or a photopolymerizable (meth)acrylate oligomer, and an anti-rust agent. The polymerizable compound includes a combination of a monofunctional (meth)acrylate monomer and a bifunctional (meth)acrylate monomer, or a combination of at least one of a monofunctional (meth)acrylate monomer or a bifunctional (meth)acrylate monomer and at least one of a trifunctional (meth)acrylate monomer or a polyfunctional (meth)acrylate monomer having four or more functional groups. The anti-corrosive material has a viscosity of 18,900 mPa.Math.s or less.

An anti-corrosive material includes an ultraviolet curable resin including, as a main component, a polymerizable compound including at least one of a photopolymerizable (meth)acrylate monomer or a photopolymerizable (meth)acrylate oligomer, and an anti-rust agent. The polymerizable compound includes a combination of a monofunctional (meth)acrylate monomer and a bifunctional (meth)acrylate monomer, or a combination of at least one of a monofunctional (meth)acrylate monomer or a bifunctional (meth)acrylate monomer and at least one of a trifunctional (meth)acrylate monomer or a polyfunctional (meth)acrylate monomer having four or more functional groups. The anti-corrosive material has a viscosity of 18,900 mPa.Math.s or less.

An anti-corrosive material includes an ultraviolet curable resin including, as a main component, a polymerizable compound including at least one of a photopolymerizable (meth)acrylate monomer or a photopolymerizable (meth)acrylate oligomer, and an anti-rust agent. The polymerizable compound includes a combination of a monofunctional (meth)acrylate monomer and a bifunctional (meth)acrylate monomer, or a combination of at least one of a monofunctional (meth)acrylate monomer or a bifunctional (meth)acrylate monomer and at least one of a trifunctional (meth)acrylate monomer or a polyfunctional (meth)acrylate monomer having four or more functional groups. The anti-corrosive material has a viscosity of 18,900 mPa.Math.s or less.

The present invention provides covered particles wherein insulating layers cover the surfaces of electroconductive particles, and the covered particles are excellent in the adhesion between the surfaces of the electroconductive particles and the insulating layers. The covered particles includes: electroconductive particles in which metal films are formed on the surfaces of core materials, and a triazole-based compound is disposed on the outer surfaces on the sides opposite to the core materials in the metal films; and insulating layers covering the electroconductive particles, and the insulating layers comprise a compound having phosphonium groups.

The present invention provides covered particles wherein insulating layers cover the surfaces of electroconductive particles, and the covered particles are excellent in the adhesion between the surfaces of the electroconductive particles and the insulating layers. The covered particles includes: electroconductive particles in which metal films are formed on the surfaces of core materials, and a triazole-based compound is disposed on the outer surfaces on the sides opposite to the core materials in the metal films; and insulating layers covering the electroconductive particles, and the insulating layers comprise a compound having phosphonium groups.

A transparent weathering resistant foil for protection of various substrates against solar radiation contains at least two layers A and B, wherein the spectral transmittance of the layer A at any wavelength λ.sub.A is not more than 10%; wherein 270 nm≤λ.sub.A≤360 nm; and the spectral transmittance of the layer B at any wavelength λ.sub.B is not more than 10%; wherein 270 nm≤λ.sub.B≤370 nm. The foil can also contain at least two layers A and B; wherein the spectral transmittance of the layer A at any wavelength λ.sub.A is not more than 20%; wherein 270 nm≤λ.sub.A≤310 nm; and the spectral transmittance of the layer B at any wavelength λ.sub.B is not more than 10%; wherein 270 nm≤λ.sub.B≤370 nm.

A transparent weathering resistant foil for protection of various substrates against solar radiation contains at least two layers A and B, wherein the spectral transmittance of the layer A at any wavelength λ.sub.A is not more than 10%; wherein 270 nm≤λ.sub.A≤360 nm; and the spectral transmittance of the layer B at any wavelength λ.sub.B is not more than 10%; wherein 270 nm≤λ.sub.B≤370 nm. The foil can also contain at least two layers A and B; wherein the spectral transmittance of the layer A at any wavelength λ.sub.A is not more than 20%; wherein 270 nm≤λ.sub.A≤310 nm; and the spectral transmittance of the layer B at any wavelength λ.sub.B is not more than 10%; wherein 270 nm≤λ.sub.B≤370 nm.

Provided is an additive for imparting ultraviolet absorbency, or an additive for imparting a high refractive index, which has satisfactory compatibility with a resin serving as a matrix and can maintain high transparency even if added in high concentrations. Also provided is an additive with which the function of imparting both ultraviolet absorbency and a high refractive index can be realized by means of one kind of additive. This additive is represented by the following Formula (I): ##STR00001## wherein at least one of R.sup.1a to R.sup.9a is a monovalent sulfur-containing group represented by the following Formula (i-1) or Formula (i-2):
R.sup.10a.sub.mSH  (i-1)
R.sup.11a.sub.nSR.sup.12a—S.sub.pR.sup.13a  (i-2) wherein R.sup.10a to R.sup.12a each represent a divalent hydrocarbon group or the like; and R.sup.13a represents a monovalent hydrocarbon group or the like.