Abstract: There is provided a transparent hybrid sheet having superior transparency and thermal resistance and having smaller linear expansion coefficient and optical anisotropy and higher degree of flatness. In a transparent hybrid sheet obtained by curing a hybrid composition including an epoxy resin composition containing alicyclic epoxy compound and a curing agent and curing a glass filler together, the alicyclic epoxy compound contains, as a principal component thereof, a diepoxybicyclohexyl compound represented by Formula (1) below, with amounts of isomers of the diepoxybicyclohexyl compound being 20% or less, of a sum of the diepoxybicyclohexyl compound and the isomers, in terms of a ratio of its peak area determined by a gas chromatography.

Abstract: There is provided a transparent hybrid sheet having superior transparency and thermal resistance and having smaller linear expansion coefficient and optical anisotropy and higher degree of flatness. In a transparent hybrid sheet obtained by curing a hybrid composition including an epoxy resin composition containing alicyclic epoxy compound and a curing agent and curing a glass filler together, the alicyclic epoxy compound contains, as a principal component thereof, a diepoxybicyclohexyl compound represented by Formula (1) below, with amounts of isomers of the diepoxybicyclohexyl compound being 20% or less, of a sum of the diepoxybicyclohexyl compound and the isomers, in terms of a ratio of its peak area determined by a gas chromatography.

Abstract: A transparent composite sheet that has a small linear expansion coefficient, excellent transparency/heat resistance, minimal optical anisotropy, and a high degree of flatness, and that also has excellent impact resistance and flexibility; and a substrate for a display element. A transparent composite sheet obtained by curing a composite composition comprising a glass filler and a transparent resin composition that includes an alicyclic epoxy resin indicated by Chemical Formula (1) below and/or an alicyclic epoxy resin indicated by Chemical Formula (2) below; at least one type of compound other than the alicyclic epoxy resin having a cationic-polymerizable functional group; and a curing agent; wherein the admixture ratio of the alicyclic epoxy resin and the compound having a cationic-polymerizable functional group is preferably 99:1 to 70:30.

Abstract: The object of the invention is to provide an optical material serving as a glass substitute, showing high light transmissivity in a broad wavelength range and capable of being adequately used in producing transparent sheets, optical lenses, liquid crystal display element plastic substrates, color filter substrates, organic EL display element plastic substrates, solar cell substrates, touch panels, optical elements, optical waveguides and LED sealants, among others, by using ordinary glass fillers. The above optical material can be obtained from a transparent composite composition which comprises a transparent resin and a glass filler and in which the transparent resin has an Abbe number of not smaller than 45.

Abstract: A transparent composite composition is provided which comprises an epoxy resin (a) and a glass filler (b) and in which the epoxy resin (a) comprises at least one epoxy resin whose refractive index after curing is lower than the refractive index of the glass filler (b) and at least one epoxy resin whose refractive index after curing is higher than the refractive index of the glass filler (b). The transparent composite composition of the invention has a low coefficient of linear expansion and is excellent in transparency, heat resistance and solvent resistance, among others and, therefore, is judiciously used, for example, in the form of liquid crystal display device substrates and organic EL device substrates (in particular of the active matrix type) and, further, transparent sheets, optical lenses, color filter substrates, solar cell substrates, touch panels, optical devices, optical waveguides, LED sealing materials and so forth.

Abstract: The object of the invention is to provide an optical material serving as a glass substitute, showing high light transmissivity in a broad wavelength range and capable of being adequately used in producing transparent sheets, optical lenses, liquid crystal display element plastic substrates, color filter substrates, organic EL display element plastic substrates, solar cell substrates, touch panels, optical elements, optical waveguides and LED sealants, among others, by using ordinary glass fillers. The above optical material can be obtained from a transparent composite composition which comprises a transparent resin and a glass filler and in which the transparent resin has an Abbe number of not smaller than 45.

Abstract: A transparent composite composition is provided which comprises an epoxy resin (a) and a glass filler (b) and in which the epoxy resin (a) comprises at least one epoxy resin whose refractive index after curing is lower than the refractive index of the glass filler (b) and at least one epoxy resin whose refractive index after curing is higher than the refractive index of the glass filler (b).