A chromene compound having at least one indenonaphthopyran moiety which has a group forming a spiro ring together with the 13-position carbon atom and further an oligomer chain group selected from a polyalkylene oxide oligomer chain group having at least three recurring units and a polyester oligomer chain group having at least three recurring units, represented by the following formula and having reduced matrix dependence: ##STR00001##
wherein R.sup.1 and R.sup.2 are each a group which may have an oligomer chain group, the ring Z bonded to the 13-position carbon atom of the chromene compound is a Spiro ring group, and R.sup.3 and R.sup.4 are each an aryl group or heteroaryl group which may have an oligomer chain group. Preferably, the chromene compound has at least one oligomer chain group in the molecule.

A chromene compound having at least one indenonaphthopyran moiety which has a group forming a spiro ring together with the 13-position carbon atom and further an oligomer chain group selected from a polyalkylene oxide oligomer chain group having at least three recurring units and a polyester oligomer chain group having at least three recurring units, represented by the following formula and having reduced matrix dependence: ##STR00001##
wherein R.sup.1 and R.sup.2 are each a group which may have an oligomer chain group, the ring Z bonded to the 13-position carbon atom of the chromene compound is a Spiro ring group, and R.sup.3 and R.sup.4 are each an aryl group or heteroaryl group which may have an oligomer chain group. Preferably, the chromene compound has at least one oligomer chain group in the molecule.

A resin composition is provided. The resin composition comprises the following constituents: (A) epoxy resin; (B) a compound of formula (I), ##STR00001## in formula (I), R.sub.1 and R.sub.2 are independently —H, —CH.sub.3, or —C(CH.sub.3); and (C) an optional filler.

A resin composition is provided. The resin composition comprises the following constituents: (A) epoxy resin; (B) a compound of formula (I), ##STR00001## in formula (I), R.sub.1 and R.sub.2 are independently —H, —CH.sub.3, or —C(CH.sub.3); and (C) an optional filler.

A resin composition is provided. The resin composition comprises the following constituents: (A) epoxy resin; (B) a compound of formula (I), ##STR00001## in formula (I), R.sub.1 and R.sub.2 are independently —H, —CH.sub.3, or —C(CH.sub.3); and (C) an optional filler.

A polymerizable composition for optical materials of the present invention contains (A) a polyisocyanate compound, (B) a polythiol compound, (C) a photochromic compound, (D) a polyether compound having a number-average molecular weight of 50 to 10,000, and (E) a polyether-modified siloxane compound having a viscosity of 1 mPa.Math.s or more and less than 1,600 mPa.Math.s.

The present invention discloses a polyurethane-based photochromic resin lens and a preparation method thereof. The lens includes the following ingredients: 100 weight parts of polyurethane monomers, 0.01-0.1 weight part of an initiator, 0.1-10 weight parts of an additive and 0.01-0.2 weight part of color changing powder, wherein the additive is a molecular weight modifier. The photochromic resin lens of the present invention uses a polyurethane base to realize substrate color change, the impact-resistant strength is high, a photochromic effect is good, a visible light transmittance of the lens after hard coating can reach about 93%, and after the deepest color change depth is reached under ultraviolet irradiation, the visible light transmittance is only 15-25%.

The present invention discloses a polyurethane-based photochromic resin lens and a preparation method thereof. The lens includes the following ingredients: 100 weight parts of polyurethane monomers, 0.01-0.1 weight part of an initiator, 0.1-10 weight parts of an additive and 0.01-0.2 weight part of color changing powder, wherein the additive is a molecular weight modifier. The photochromic resin lens of the present invention uses a polyurethane base to realize substrate color change, the impact-resistant strength is high, a photochromic effect is good, a visible light transmittance of the lens after hard coating can reach about 93%, and after the deepest color change depth is reached under ultraviolet irradiation, the visible light transmittance is only 15-25%.

The present invention discloses a polyurethane-based photochromic resin lens and a preparation method thereof. The lens includes the following ingredients: 100 weight parts of polyurethane monomers, 0.01-0.1 weight part of an initiator, 0.1-10 weight parts of an additive and 0.01-0.2 weight part of color changing powder, wherein the additive is a molecular weight modifier. The photochromic resin lens of the present invention uses a polyurethane base to realize substrate color change, the impact-resistant strength is high, a photochromic effect is good, a visible light transmittance of the lens after hard coating can reach about 93%, and after the deepest color change depth is reached under ultraviolet irradiation, the visible light transmittance is only 15-25%.

An object of the present invention is to provide a rubber composition having excellent processability, a heterocycle-modified glycerin fatty acid ester, and a production method for the heterocycle-modified glycerin fatty acid ester. The present invention includes: a rubber composition containing a rubber, silica, and a heterocycle-modified glycerin fatty acid ester, in which an epoxy group is modified with a heterocyclic compound having a heterocycle having at least one H—N< bond, where the heterocycle is at least one selected from the group consisting of a piperazine ring, a morpholine ring, and a thiomorpholine ring, and the heterocycle may have a substituent; the heterocycle-modified glycerin fatty acid ester; and a production method therefor.