172 results about "Episulfide" patented technology

A polymerizable composition containing (A) a compound having two or more mercapto groups; (B) a NCO-terminated polyurethane prepolymer; (C) a polyisocyanate compound; and (D) an episulfide compound. The episulfide compound D has in its molecule at least one structural group represented by the following formula 1:

wherein R¹ is a divalent hydrocarbon group having from 1 to 10 carbon atoms or a single bond, R², R³ and R⁴ are each independently a hydrocarbon group having from 1 to 10 carbon atoms or hydrogen, Y is O or S, m is an integer of from 1 to 5, and n is an integer of from 0 to 5. Optical materials produced by curing the polymerizable composition by polymerization have a high refractive index and a high Abbe's number and are excellent in impact strength.

According to a preferable embodiment of the present invention, a composition for a resin comprising an inorganic compound having a sulfur atom and/or a selenium atom, an episulfide compound, and a mercaptodisulfide compound can be provided. According to another preferable embodiment of the present invention, a composition for a resin having the viscosity thereof decreased to facilitate a cast polymerization operation and thus to improve the tonality of the obtained optical material can be provided. According to still another preferable embodiment of the present invention, an optical material obtained by curing the above-described composition for a resin and having a high refractive index can be provided.

The invention relates to a composition used for anoptical material and an optical material employing the same. Provided is a composition for an optical material, and the composition helps to predict, before the stage of polymerized solidification, changes of yellow, determine the good and the bad, and contains sulfuric polyester. A sulfuric polyester compound containing iron, chrome and nickle with the total amount of below 5.0ppm and the composition of a polyiso-(sulfur)-cyanate ester compound for the optical material are introduced to solve the problem of the invention. A compound of sulfuric polyester and episulfide for the optical material, containing iron, chrome and nickle with the total amount of below 5.0ppm is also introduced.

A polymer is prepared from monomers containing at least one carbon to carbon double bond and at least one siloxane moiety and from monomers containing at least one carbon to carbon double bond and at least one moiety that imparts reactivity to the resulting polymer. Siloxane moieties impart permeability; reactivity is obtained from monomers containing epoxy, oxetane, oxazoline, benzoxazine, or episulfide functionality. Additional properties can be added to the polymer by the inclusion in the initial polymerization mix of monomers that impart low glass transition temperature, high glass transition temperature, and adhesion. The level of each functionality can be controlled by the practitioner by varying the amount of monomer containing that functionality added to the initial polymerization. These materials can be B-staged.

The invention discloses a synthesis technology for N,N-diethylamino group ethanethiol. The synthesis technology includes the steps of pressing ethane episulfide and diethylamine into a pressure reaction kettle by nitrogen, heating to the temperature of 80-100 DEG C in a closed state under the condition of stirring, and reacting for 3-5 hours to obtain the N,N-diethylamino group ethanethiol. The synthesis technology is finished in the closed reaction kettle by adopting the technical conditions as above, does not use any dissolvent or catalyst, does not generate by-product, and has the advantages of short technology flow, few material types, short reaction time and small excess of feed mole ratio of diethylamine to ethane episulfide; the mass percent of the prepared product can achieve 99%; and the whole production technology has the characteristics of low production cost, high yield, no exhaust of three wastes (waste gas, waste water, industrial residual), and the synthesis technology belongs to an environment-friendly chemical-industrial synthesis technology.

Provided is a method for producing an episulfide compound, the method including a step of thiating epoxy groups of (B) an epoxy compound by a reaction with (C) a thiating agent in the presence of (A) a polyhydric hydroxyl compound having two or more hydroxyl groups.

A negative resist composition includes: (A) a compound having at least one episulfide structure (a three-membered ring structure comprising two C atoms and one S atom); (B) an alkali-soluble resin; and (C) a compound capable of generating an acid upon irradiation with actinic rays or radiation, and a pattern forming method using the composition.

An optical material, particularly a plastic lens for spectacles, which absorbs almost all UV rays of up to around 400 nm or so and is not too yellow in color, is obtained by adding 2-(2-hydroxy-4-octyloxyphenyl)-benzotriazole to a diethylene glycol bisallylcarbonate monomer, a (thio)urethane monomer or an episulfide monomer, mixing them, and polymerizing the monomer.

According to the present invention, a resin compound for optical material, comprising (a) an episulfide compound represented by a specific structural formula, (b) a xylylenedithiol compound and (c) a xylylenediisocyanate compound can be provided. In a preferable embodiment of the present invention, a resin compound for optical material having superb optical properties, a high density and a high thermal resistance can be provided. Also according to the present invention, an optical material obtained by curing the above-described resin compound can be provided.

The invention belongs to the polymer synthesis technical field, specifically provides a polymer whose end groups contain various functional groups and a preparation method of the polymer. The invention uses polymer active carbanions induced by lithium alkyl to have quantitative cap reaction with heterocylic small molecules compounds (epoxy and episulfide compounds) containing protective group subsituents, namely one carbanion can only make the ring of one cyclic compound opened and a new active hydroxyl or mercapto is produced at the same time, therefore, the polymer end groups both contain one or a plurality of protective end groups and active hydroxyl or mercapto polymers. Then functionalized polymers with various combinations are obtained through the selective modification by the functional groups of the end groups of the polymers. In the invention, the end groups fictionalization is in high efficiency and strong universality. Moreover, the polymers can be used for designing the polymers with complex structure.

The invention discloses a synthesis method of diaryl ring fused sulfides represented by formula (B) and diaryl ring fused selenides represented by formula (C). The method is characterized in that a reaction of a reaction raw material high-iodine salt is carried out in dimethyl sulfoxide under the action of an inorganic sulfuration reagent or selenylation reagent and an alkali at 60-100 DEG C to obtain the diaryl ring fused sulfides and the diaryl ring fused selenides. Sulfur or selenium is introduced in the later stage in the presence of a nonmetal catalyst, so poisoning of sulfur to a metal catalyst in the early stage reaction is avoided; the above inorganic sulfur source is nontoxic and odorless; and two aryl groups in the high-iodine salt are fully used, so the atom economy and the greenness of the method are fully shown. The diaryl ring fused sulfides and the diaryl ring fused selenides prepared through the method can be applied to synthesize photoelectric materials BTBT and BTBS.

The invention relates to a composite for optical material, and optical material. The aim of the inventin is to provide an episulfide compound or a composite containing an episulfide compound for optical material, and the episulfide compound or the composite can be used for predicting the appearance of yellow after polymerized solidification in the stage prior to polymerized solidification and for quality determination. The total amount of iron, chrome and nickle contained in the episulfide compound or the composite containing an episulfide compound for optical material is less than 5.0ppm.

The invention provides a preparation method of R-122-based episulfide resin. The ratio of the weight (g) of R-122 epoxy resin to the volume (mL) of ethanol is 1:2 and the mass concentration of ethanol is 95%. The preparation method comprises the following steps: adding the raw materials in a three-necked container in turn which is placed in a thermostatic water bath, stirring to ensure that R-122 epoxy resin is completely dissolved, adding catalyst, introducing N2, evenly dropping a thiourea solution in 3 hours to react under uniform stirring, wherein the ratio of the weight (g) of thiourea to the volume (mL) of water is 1:10, the molar ratio of R-122 epoxy resin to thiourea is 3:(1-7):1, the reaction temperature is controlled to 30-70 DEG C and the response time is 1-5 hours and the reaction is protected by N2; and filtering the reaction product, rinsing the obtained solid product, and recrystallizing to obtain the target product, wherein the melting point of the target product is 135-145 DEG C, which is 40 DEG C lower than the melting point of R-122 epoxy resin. The catalyst has low pollution, the cost performance of the product is low, the reaction temperature is low, the reaction time is short and the yield of the product is up to 70%.

The photobase generator of the invention is represented by the following formula 1:

wherein Ar, R, A⁺ and X⁻ are as defined in the specification. Since the photobase generator of the formula 1 absorbs ultraviolet lights of relatively long wavelength and is photolyzed to generate a strong base efficiently, a composition containing the photobase generator and an episulfide compound is easily cured by polymerization under ultraviolet irradiation.

The production process of the present invention for polyarylene sulfide is characterized by that in a process for continuously producing polyarylene sulfide by reacting a sulfur source with a dihalogenated aromatic compound in an aprotic organic solvent, it comprises at least one polymerization reaction step in which two phases of a polymer phase and a solvent phase are separated and in which the polymer phase corresponding to a dispersion phase is a dispersion phase comprising globular droplets and that an end terminator is used in the above polymerization reaction step. According to the present invention, a polymer can be prevented from being adhered onto a polymerization reaction bath to thereby make it possible to discharge a polymer phase and a solvent phase from the polymerization bath in a constant proportion; resultingly, a PAS composition (concentration) in the polymerization bath can always be maintained at a constant value; and polyarylene sulfide having a raised and stabilized molecular weight can continuously be produced.

Provided is a composition for organic EL element sealing, which is capable of efficiently sealing an organic EL element with a cured product having moisture-proof properties and low outgas properties without exposing the organic EL element directly to UV. A composition for organic EL element sealing according to the present invention contains the following component (A), component (B) and component (C). Component (A): a cationically curable compound which has one or more groups selected from among an alicyclic epoxy group, an oxetane ring-containing group, an episulfide group and a vinyl ether group in an amount of two or more groups in each molecule Component (B): a cationic photopolymerization initiator Component (C): an azole compound

The invention discloses ultraviolet-curable polysiloxane and a preparation method and application thereof. According to the ultraviolet-curable polysiloxane, Si-O-Si is taken as a main chain, and a branched chain contains an aromatic group, a photocuring group and a symmetrical episulfide group modified organosilicon material. The ultraviolet-curable polysiloxane disclosed by the invention not only has high refractive index and light transmittance, does not have pungent smell and has good compatibility with organosilicon polymers, but also has good elongation at break, excellent storage stability and mechanical properties. Meanwhile, the polysiloxane has a photoactive group, and can further react to obtain a polysiloxane material with high refractive index and mechanical property, the luminous efficiency of the polysiloxane material is improved, a heat packaging process commonly applied at present is changed, the industrial efficiency is improved, and the ultraviolet-curable polysiloxane can be widely applied to the fields of flexible optical fibers, optical lenses, optical coatings, flexible display screens and the like with high requirements on optical materials.