摘要:
A method for producing trans-1,4-bis(aminomethyl)cyclohexane includes a nuclear hydrogenation step of producing a hydrogenated terephthalic acid or terephthalic acid derivative by nuclear hydrogenation of a terephthalic acid or terephthalic acid derivative, the terephthalic acid or terephthalic acid derivative being at least one selected from the group consisting of terephthalic acid, terephthalic acid ester, and terephthalic acid amide; a cyanation step of treating the hydrogenated terephthalic acid or terephthalic acid derivative with ammonia, thereby producing 1,4-dicyanocyclohexane, and producing trans-1,4-dicyanocyclohexane from the obtained 1,4-dicyanocyclohexane; and an aminomethylation step of treating the trays-1,4-dicyanocyclohexane with hydrogen, thereby producing trans-1,4-bis(aminomethyl)cyclohexane. Metal oxide is used as a catalyst in the cyanation step, and the obtained trans-1,4-dicyanocyclohexane has a metal content of 3000 ppm or less.
摘要:
A polyisocyanate composition contains a modified product of xylylene diisocyanate and a modified product of pentamethylene diisocyanate, and/or a modified product of the xylylene diisocyanate and the pentamethylene diisocyanate. The ratio of the pentamethylene diisocyanate with respect to the total amount of the xylylene diisocyanate and the pentamethylene diisocyanate is 5 mol% or more and 40 mol% or less.
摘要:
Supported phosphazene catalysts each comprising a carrier and groups represented by the general formula (1) which are supported on the carrier: (1) wherein n represents the number of phosphazenium cations and is an integer of 1 to 8; Zn- is an anion derived from an active hydrogen compound having at most eight active hydrogen atoms by removing n protons; a, b, c and d are each a positive integer of 3 or below; R's may be the same or different and are each hydrocarbyl of 1 to 10 carbon atoms, or two R's on the same nitrogen atom may be united to form a ring structure; R1 is hydrogen or hydrocarbyl of 1 to 10 carbon atoms; and D is a direct bond or a divalent group capable of connecting the nitrogen atom to the carrier. The supported catalysts are extremely effective for various organic reactions. Further, the catalysts are reusable and therefore economically advantageous, because they cause little lowering in the activity even when recovered and reused. The catalysts can attain efficient polymerization of cyclic monomers, replacement of substituents, carbon-carbon bond formation, and other reactions.
摘要:
A method for producing bis(aminomethyl)cyclohexanes includes a nuclear hydrogenation step of producing hydrogenated phthalic acids or phthalic acid derivatives by nuclear hydrogenation of phthalic acids or phthalic acid derivatives of at least one selected from the group consisting of phthalic acids, phthalic acid esters, and phthalic acid amides; a cyanation step of treating the hydrogenated phthalic acids or phthalic acid derivatives obtained in the nuclear hydrogenation step with ammonia, thereby producing dicyanocyclohexanes; and an aminomethylation step of treating the dicyanocyclohexanes obtained in the cyanation step with hydrogen, thereby producing bis(aminomethyl)cyclohexanes. In the cyanation step, metal oxide is used as a catalyst, and the obtained dicyanocyclohexanes have a metal content of 3000 ppm or less.
摘要:
A method for producing bis(aminomethyl)cyclohexanes includes a nuclear hydrogenation step of producing hydrogenated phthalic acids or phthalic acid derivatives by nuclear hydrogenation of phthalic acids or phthalic acid derivatives of at least one selected from the group consisting of phthalic acids, phthalic acid esters, and phthalic acid amides; a cyanation step of treating the hydrogenated phthalic acids or phthalic acid derivatives obtained in the nuclear hydrogenation step with ammonia, thereby producing dicyanocyclohexanes; and an aminomethylation step of treating the dicyanocyclohexanes obtained in the cyanation step with hydrogen, thereby producing bis(aminomethyl)cyclohexanes. In the cyanation step, metal oxide is used as a catalyst, and the obtained dicyanocyclohexanes have a metal content of 3000 ppm or less.
摘要:
1,4-bis(isocyanatomethyl)cyclohexane contains 70 mol% or more and 95 mol% or less of a trans isomer relative to a total amount of a cis isomer and the trans isomer, and 0.1 ppm or more and 300 ppm or less of the compound represented by formula (1) below:
摘要:
A polyisocyanate composition contains a modified product of xylylene diisocyanate and a modified product of pentamethylene diisocyanate, and/or a modified product of the xylylene diisocyanate and the pentamethylene diisocyanate. The ratio of the pentamethylene diisocyanate with respect to the total amount of the xylylene diisocyanate and the pentamethylene diisocyanate is 30 mol% or more and 80 mol% or less.
摘要:
A polycarbodiimide composition is a reaction product of polyisocyanate having a primary isocyanate group and alcohols, wherein in an infrared absorption spectrum, the intensity ratio (IR CI /IR UI+U ) of absorbance IR CI at or near 2120 cm -1 due to stretching vibration of the carbodiimide group relative to absorbance IR UI+U at or near 1720 cm -1 due to stretching vibration of the uretonimine group and urethane group is 1.5 or more and 4.5 or less.
摘要:
A polyisocyanate composition includes at least a pentamethylenediisocyanate derivative. The polyisocyanate composition contains 5 mass% or more and 95 mass% or less of a uretdione derivative composed of an isocyanate bimolecular-product of pentamethylenediisocyanate.