Abstract: The present invention relates to a polymerizable composition based on allyl carbonate monomers comprising: —from 40% to 90% of a first reactive component (component A) comprising at least 50% by weight of diethylene glycol bis(allyl carbonate); from 10% to 60% of a second reactive component (component B) consisting of at least one compound having general formula (II) or having general formula (III) from 0.4 to 10.0 phm (parts by weight per 100 parts of the total weight of components A and B) of at least one peroxide radical initiator. The present invention also relates to the polymerized products that can be obtained from the above composition, their preparation process and their use as organic glass.

Abstract: A polymerizable composition for an optical material of the present invention includes a compound (A) represented by General Formula (1) including two or more allyloxycarbonyl groups; an ultraviolet absorbing agent (B) represented by General Formula (i); at least one kind of radical polymerization initiator (C) selected from the group consisting of a peroxyketal-based radical polymerization initiator, a peroxymonocarbonate-based radical polymerization initiator, and a peroxyester-based radical polymerization initiator; at least one kind of dye (D) selected from an anthraquinone-based dye, a perinone-based dye, a monoazo-based dye, a diazo-based dye, and a phthalocyanine-based dye.

Abstract: A polymerizable composition according to the present invention includes a compound (A) including two or more allyloxycarbonyl groups represented by Formula (1); at least one kind of polymerization initiator (B) selected from the group consisting of a peroxyketal-based radical polymerization initiator, a peroxy monocarbonate-based radical polymerization initiator, and a peroxyester-based radical polymerization initiator; and at least one kind of photochromic compound (C) selected from a naphthopyran compound group.

Abstract: A polymerizable composition according to the present invention includes a compound (A) including two or more allyloxycarbonyl groups represented by Formula (1); at least one kind of polymerization initiator (B) selected from the group consisting of a peroxyketal-based radical polymerization initiator, a peroxy monocarbonate-based radical polymerization initiator, and a peroxyester-based radical polymerization initiator; and at least one kind of photochromic compound (C) selected from a naphthopyran compound group.

Abstract: The present invention relates to a polymerizable composition based on allyl carbonate monomers comprising: —from 40% to 90% of a first reactive component (component A) comprising at least 50% by weight of diethylene glycol bis(allyl carbonate); from 10% to 60% of a second reactive component (component B) consisting of at least one compound having general formula (II) or having general formula (III) from 0.4 to 10.0 phm (parts by weight per 100 parts of the total weight of components A and B) of at least one peroxide radical initiator. The present invention also relates to the polymerized products that can be obtained from the above composition, their preparation process and their use as organic glass.

Abstract: A polymerizable composition for an optical material of the present invention includes a compound (A) represented by General Formula (1) including two or more allyloxycarbonyl groups; an ultraviolet absorbing agent (B) represented by General Formula (i); at least one kind of radical polymerization initiator (C) selected from the group consisting of a peroxyketal-based radical polymerization initiator, a peroxymonocarbonate-based radical polymerization initiator, and a peroxyester-based radical polymerization initiator; at least one kind of dye (D) selected from an anthraquinone-based dye, a perinone-based dye, a monoazo-based dye, a diazo-based dye, and a phthalocyanine-based dye.

Abstract: Polymerizable liquid compositions containing three components (A), (B) and (C) are provided, wherein component (A) contains at least one cycloaliphatic diisocyanate monomer wherein the weight percentage of free isocyanate groups in component (A) ranges from about 20% to about 50% by weight with respect to the total weight of component (A); component (B) contains at least one polythiol having a molecular weight ranging from 50 to 1,200 g/moles and a functionality ranging from 2 to 5, the components (A) and (B) being present in a weight ratio varying from 0.5:1 to 2:1; and component (C) being a defined polymerization catalyst. A process for the production of organic glass using the polymerizable liquid composition is further provided.

Abstract: The present invention relates to a polymerizable composition comprising polyisocyanate(s) (A), polythiol(s) (B), thiol(s) (C) and catalyst(s) (D). The polyisocyanate(s) (A) is at least one bifunctional or higher functional alicyclic polyisocyanate; the polythiol(s) (B) is at least one compound selected from polythiols represented by the following general formula (B1); the thiol(s) (C) is at least one compound selected from thiols having general formula (3); and the catalyst(s) (D) is at least one polymerization catalyst selected from metal compounds, quaternary ammonium salts, organic sulfonic acids, tertiary amines and relative inorganic or organic salts.

Abstract: The present invention relates to a polymerizable composition comprising polyisocyanate(s) (A), polythiol(s) (B), thiol(s) (C) and catalyst(s) (D). The polyisocyanate(s) (A) is at least one bifunctional or higher functional alicyclic polyisocyanate; the polythiol(s) (B) is at least one compound selected from polythiols represented by the following general formula (B1); the thiol(s) (C) is at least one compound selected from thiols having general formula (3); and the catalyst(s) (D) is at least one polymerization catalyst selected from metal compounds, quaternary ammonium salts, organic sulfonic acids, tertiary amines and relative inorganic or organic salts.

Abstract: Polymerizable liquid compositions containing three components (A), (B) and (C) are provided, wherein component (A) contains at least one cycloaliphatic diisocyanate monomer wherein the weight percentage of free isocyanate groups in component (A) ranges from about 20% to about 50% by weight with respect to the total weight of component (A); component (B) contains at least one polythiol having a molecular weight ranging from 50 to 1,200 g/moles and a functionality ranging from 2 to 5, the components (A) and (B) being present in a weight ratio varying from 0.5:1 to 2:1; and component (C) being a defined polymerization catalyst. A process for the production of organic glass using the polymerizable liquid composition is further provided.

Abstract: Polymerizable liquid compositions of the polyurethane type, consisting of two components (A) and (B), wherein component (A) contains at least one cyclo-aliphatic diisocyanate monomer or a mixture of one cyclo-aliphatic diisocyanate monomer and a pre-polymer obtained by reaction, in the presence of an acid phosphate ester catalyst, between said cyclo-aliphatic diisocyanate monomer and one or more polyols having two or more hydroxy 1 groups per molecule and a molecular weight ranging from 50 to 2,000 g/mole; the second component (B) contains one or more polyols having a molecular weight ranging from 50 to 2,000 g/mole and a functionality between 2 and 5; in the absence of polyalkoxylated tertiary diamines and organometallic catalysts, said components (A) and (B) being present in a weight ratio which varies from 1:1 to 2:1 and the process for the production of organic glass starting from polymerizable liquid compositions of the polyurethane type.

Abstract: Polymerization catalysts for organic polythiourethane glass which do not contain organometallic compounds contain a mixture of a tertiary aliphatic amine and a disubstituted phosphoric acid in a molar ratio ranging from 1/1.3 to 1/20. Polymerizable liquid compositions containing three components (A), (B) and (C) are also provided, wherein component (A) contains at least one cycloaliphatic diisocyanate monomer wherein the weight percentage of free isocyanate groups in component (A) ranges from about 20% to about 50% by weight with respect to the total weight of component (A); component (B) contains at least one polythiol having a molecular weight ranging from 50 to 1,200 g/moles and a functionality ranging from 2 to 5, said components (A) and (B) being present in a weight ratio varying from 0.5:1 to 2:1; and component (C) being said polymerization catalyst. A process for the production of organic glass using the polymerizable liquid composition is further provided.

Abstract: Polymerizable liquid compositions of the polyurethane type, consisting of two components (A) and (B), wherein component (A) contains at least one cyclo-aliphatic diisocyanate monomer or a mixture of one cyclo-aliphatic diisocyanate monomer and a pre-polymer obtained by reaction, in the presence of an acid phosphate ester catalyst, between said cyclo-aliphatic diisocyanate monomer and one or more polyols having two or more hydroxy 1 groups per molecule and a molecular weight ranging from 50 to 2,000 g/mole; the second component (B) contains one or more polyols having a molecular weight ranging from 50 to 2,000 g/mole and a functionality between 2 and 5; in the absence of polyalkoxylated tertiary diamines and organometallic catalysts, said components (A) and (B) being present in a weight ratio which varies from 1:1 to 2:1 and the process for the production of organic glass starting from polymerizable liquid compositions of the polyurethane type.

Abstract: A liquid composition is described, which can undergo radicalic polymerization into organic glass, comprising: 1) the product obtained from the transesterification of diallyl carbonate (A) with a blend of one or more linear or branched aliphatic diols (B), containing from three to ten carbon atoms in the molecule, with a linear or branched aliphatic polyol (C), containing from four to twenty carbon atoms and from three to six hydroxyl groups in the molecule, in an overall concentration ranging from 70 to 100% by weight with respect to the total weight of the mixture of components 1) and 2); 2) one or more comonomers of the acrylic, methacrylic, vinylic or allylic type and mixtures thereof, in an overall concentration ranging from 0 to 30% by weight with respect to the total weight of the mixture of components 1) and 2); 3) a polymerization initiator or a mixture of two or more polymerization initiators, stable at room temperature, belonging to the group of peroxides, in an overall concentration ranging from 0.

Abstract: Liquid composition which can be polymerized into organic glasses, by means of radical polymerization with low shrinkage, comprising the product obtained from the trans-esterification of a diallycarbonate (A) with a mixture of one or more linear or branched aliphatic diols (B), containing from three to ten carbon atoms in the molecule, with a linear or branched aliphatic polyol (C), containing from four to twenty carbon atoms and from three to six hydroxyl groups in the molecule. The molar ratio A/(B+C) in the above polymerizable liquid composition ranges from 2/1 to 5/1 and the quantity of (C) in the mixture (B+C) is equal to or less than 25% by weight with respect to the total weight of this mixture.

Abstract: Liquid composition polymerizable, by means of radicalic polymerization, into organic glass, comprising the product obtained from the transesterification of a mixture of diallyl carbonate (A) and a phthalic ester (B), with one or more polyols (C), linear or branced, containing from two to eight carbon atoms in the molecule.

Abstract: Composition forming artificial marble or granite, comprising:

Abstract: A liquid composition, polymerizable by means of a free-radical route to yield optical articles endowed with a high refractive index, contains an allyl-carbonate derivative definable with the general formula: (wherein R1, X1, X2, X3, X4, X5, X6, a and b are as defined in the disclosure) and a copolymerizable monomer containing at least one ethylenic unsaturation in its molecule.

Abstract: A polymerizable liquid composition includesa polymerizable poly(allyl carbonate) of an aliphatic or cyclo-aliphatic polyol;an organic peroxide generator of free radicals selected from the group of perketals, and possiblyan organic dye and/or an organic photochromic compound.The compositions can be transformed, by bulk polymerization, into an organic glass which is colorless, or colored or photochromic, having good optical and mechanical characteristics.

Abstract: A liquid composition, polymerizable by free-radical polymerization to yield organic glasses which are endowed with characteristics of low water absorption and high thermal stability, is constituted by the product of transesterification of diallyl-carbonate with a cycloaliphatic diol or a mixture of cycloaliphatic diols, from among said diols 1,4-cyclohexane-di-methanol and 3(4),8(9)-bis-(hydroxymethyl)tricyclo[5.2.1.0.sup.2.6 ]decane being preferred.