Polyallylamine derivatives including 10 to 450 structural units represented by Formula (1):

##STR00001##

are useful for preparing dispersants, treated particles, particle-containing compositions, pigment-containing compositions, paints, ink compositions, liquid developers, and anti-blocking agents.

The present invention relates to: a polymerizable compound represented by a formula (I); a polymerizable composition comprising the polymerizable compound and an initiator; a polymer obtained by polymerizing the polymerizable compound or the polymerizable composition; and an optically anisotropic article comprising the polymer [in the formula, Y.sup.1 to Y.sup.8 are a chemical single bond, —O—, —O—C(═O)—, —C(═O)—O—, or the like; G.sup.1 and G.sup.2 are a divalent aliphatic group having 1 to 20 carbon atoms, or the like; Z.sup.1 and Z.sup.2 are an alkenyl group having 2 to 10 carbon atoms, or the like; A.sup.1 is a tetravalent aromatic group, or the like; A.sup.2 and A.sup.3 are a divalent alicyclic hydrocarbon group having 3 to 30 carbon atoms, or the like; A.sup.4 and A.sup.5 are a divalent aromatic group having 4 to 30 carbon atoms, or the like; A.sup.x1 and A.sup.x2 are an organic group having 2 to 30 carbon atoms that includes an aromatic ring, or the like; A.sup.y1 and A.sup.y2 are a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like; Q.sup.1 and Q.sup.2 are a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like; and m and n are 0 or 1]. According to the present invention, a polymerizable compound, a polymerizable composition, and a polymer that have a practical low melting point, exhibit excellent solubility in a general-purpose solvent, can be produced at low cost, and can produce an optical film that achieves uniform conversion of polarized light over a wide wavelength band, and also provide an optically anisotropic article. ##STR00001##

Provided is a method of purifying a monomer composition that contains a polycyclic aromatic vinyl compound including at least two monocycles selected from the group consisting of aromatic hydrocarbon monocycles and aromatic heteromonocycles. The purification method includes an impurity removal step of removing at least sulfur from the monomer composition.

Solar energy device comprising at least one of a photovoltaic cell or a solar thermal collector having an absorption bandwidth in the infrared wavelength region of the solar spectrum; a visible light-transmitting reflector; and at least one of a graphic film or lighted display. The graphic film or a lighted display present is visible through the visible light-transmitting reflector. The solar energy devices can be used, for example, as a sign (e.g., an advertising sign or a traffic sign), on the side and/or roof, as well as in a window, of a building.

Solar energy device comprising at least one of a photovoltaic cell or a solar thermal collector having an absorption bandwidth in the infrared wavelength region of the solar spectrum; a visible light-transmitting reflector; and at least one of a graphic film or lighted display. The graphic film or a lighted display present is visible through the visible light-transmitting reflector. The solar energy devices can be used, for example, as a sign (e.g., an advertising sign or a traffic sign), on the side and/or roof, as well as in a window, of a building.

The invention is related to azetidinium-containing copolymers and vinylic monomers and their uses in formation of non-silicone hydrogel coatings on silicone hydrogel contact lenses.

The invention is related to azetidinium-containing copolymers and vinylic monomers and their uses in formation of non-silicone hydrogel coatings on silicone hydrogel contact lenses.

Solar energy device comprising at least one of a photovoltaic cell or a solar thermal collector having an absorption bandwidth in the infrared wavelength region of the solar spectrum; a visible light-transmitting reflector; and at least one of a graphic film or lighted display. The graphic film or a lighted display present is visible through the visible light-transmitting reflector. The solar energy devices can be used, for example, as a sign (e.g., an advertising sign or a traffic sign), on the side and/or roof, as well as in a window, of a building.

Solar energy device comprising at least one of a photovoltaic cell or a solar thermal collector having an absorption bandwidth in the infrared wavelength region of the solar spectrum; a visible light-transmitting reflector; and at least one of a graphic film or lighted display. The graphic film or a lighted display present is visible through the visible light-transmitting reflector. The solar energy devices can be used, for example, as a sign (e.g., an advertising sign or a traffic sign), on the side and/or roof, as well as in a window, of a building.

Polyallylamine derivatives including 10 to 450 structural units represented by Formula (1): ##STR00001##
are useful for preparing dispersants, treated particles, particle-containing compositions, pigment-containing compositions, paints, ink compositions, liquid developers, and anti-blocking agents.