A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g.Math.cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5105, a peak width in an absorbance of of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.

According to the present disclosure, there are provided a surface treatment agent having the advantage that the raw material components can be dissolved in a short time during preparation of the surface treatment agent and capable of exerting a good water repellency imparting effect, and a method of manufacturing a surface-treated body with the use of the surface treatment agent. The surface treatment agent according to the present disclosure includes the following components: (I) at least one kind selected from the group consisting of silicon compounds represented by the following general formulas [1], [2] and [3]; (II) at least one kind selected from the group consisting of a nitrogen-containing heterocyclic compound represented by the following general formula [4], a nitrogen-containing heterocyclic compound represented by the following general formula [5], and imidazole; and (III) an organic solvent.

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The present invention provides a photocurable composition containing an ultraviolet absorber, which has high photocurability and yields a cured material having a high cutting capacity against ultraviolet rays from the outside, a low yellow index, and colorlessness and transparency. The present invention relates to a sheet-shaped photocurable composition which includes the following components (A) to (D), and when a cured material obtained after photocuring the photocurable composition has a thickness of 150 m, a yellow index of the cured material is 4.0 or less and a light transmittance of the cured material at a wavelength of 385 nm is 5.0% or less: a component (A): a (meth)acrylate compound, a component (B): a film forming resin, a component (C): a photoinitiator, and a component (D): an ultraviolet absorber.

The present invention provides a photocurable composition containing an ultraviolet absorber, which has high photocurability and yields a cured material having a high cutting capacity against ultraviolet rays from the outside, a low yellow index, and colorlessness and transparency. The present invention relates to a sheet-shaped photocurable composition which includes the following components (A) to (D), and when a cured material obtained after photocuring the photocurable composition has a thickness of 150 m, a yellow index of the cured material is 4.0 or less and a light transmittance of the cured material at a wavelength of 385 nm is 5.0% or less: a component (A): a (meth)acrylate compound, a component (B): a film forming resin, a component (C): a photoinitiator, and a component (D): an ultraviolet absorber.

A method for producing a millable silicone rubber sponge is a method for producing a millable silicone rubber sponge with an open cell ratio of not lower than 20%, comprising: performing a heat treatment on a silicone rubber composition at 200 C. or higher, the silicone rubber composition containing: (A) an organopolysiloxane having at least two alkenyl groups in one molecule and a polymerization degree of not lower than 3,000; (B) a reinforcing silica; (C) thermally expandable microcapsules exhibiting an expansion starting temperature of 90 to 150 C., and contracting from a maximum expansion volume by 20% or more when heated at 200 C. for 5 min; (D) a curing agent; and (E) an open cell-forming agent which is a solid high temperature decomposition-type organic foaming agent having a decomposition starting temperature of not lower than. 180 C., and starting to decompose after the component (A) is cured.

A method for producing a millable silicone rubber sponge is a method for producing a millable silicone rubber sponge with an open cell ratio of not lower than 20%, comprising: performing a heat treatment on a silicone rubber composition at 200 C. or higher, the silicone rubber composition containing: (A) an organopolysiloxane having at least two alkenyl groups in one molecule and a polymerization degree of not lower than 3,000; (B) a reinforcing silica; (C) thermally expandable microcapsules exhibiting an expansion starting temperature of 90 to 150 C., and contracting from a maximum expansion volume by 20% or more when heated at 200 C. for 5 min; (D) a curing agent; and (E) an open cell-forming agent which is a solid high temperature decomposition-type organic foaming agent having a decomposition starting temperature of not lower than. 180 C., and starting to decompose after the component (A) is cured.

Provided is a coating material for forming a conductive release layer capable of forming a conductive release layer having high adhesion to a film base material, suppressing deterioration in conductivity over time in the air, and having a sufficient releasing property. The coating material for forming a conductive release layer of the present invention contains a conductive composite including a -conjugated conductive polymer and a polyanion, an epoxy compound having an epoxy group, a curable silicone, a polyester resin, and an organic solvent.

Provided is a coating material for forming a conductive release layer capable of forming a conductive release layer having high adhesion to a film base material, suppressing deterioration in conductivity over time in the air, and having a sufficient releasing property. The coating material for forming a conductive release layer of the present invention contains a conductive composite including a -conjugated conductive polymer and a polyanion, an epoxy compound having an epoxy group, a curable silicone, a polyester resin, and an organic solvent.

A polishing liquid used for chemical mechanical polishing includes colloidal silica, in which a zeta potential of the colloidal silica measured in a state where the colloidal silica is present in the polishing liquid is 20 mV or less, an electrical conductivity is 200 S/cm or less, a pH is 2 to 6, and a transmittance is 70% to 99%.

A polishing liquid used for chemical mechanical polishing includes colloidal silica, in which a zeta potential of the colloidal silica measured in a state where the colloidal silica is present in the polishing liquid is 20 mV or less, an electrical conductivity is 200 S/cm or less, a pH is 2 to 6, and a transmittance is 70% to 99%.