Abstract: The composition comprises a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), and comprises 0.00002 to 2.0 parts by mass of the compound (B) with respect to 100 parts by mass of the compound (A), (R1—COO)n—R2—(NCO)m??(1) (R1—COO)n—R2—NHC(?O)NH—R2—(OCO—R1)m??(2) wherein in general formulae (1) and (2), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contain an ether group; R1 and R2 in the general formula (1) are the same as R1 and R2 in the general formula (2); and n and m each represent an integer of one or two.

Abstract: A composition is provided including a compound (A) represented by Formula (1) and a compound (B) represented by Formula (2), wherein the compound (B) is contained in an amount of 0.00002 to 0.2 parts by mass with respect to 100 parts by mass of the compound (A): (R1—COO)n—R2—(NCO)m . . . (1) (in Formula (1), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is an (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms; and n and m are each an integer of 1 or 2) (in Formula (2), R is (—R2—(OCO—R1), and R1 and R2 are the same as those in Formula (1)).

Abstract: The invention relates to a composition excellent in stability during storage and stability during utilization, and relates to a method of producing the composition. The composition includes a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), and includes 0.00002 to 0.2 parts by mass of the compound (B) with respect to 100 parts by mass of the compound (A), (R1—COO)n—R2—(NCO)m??(1) (R1—COO)n—R2—(R3—R1)m??(2) wherein in general formulae (1) and (2), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contains an ether group; R1 and R2 in the general formula (1) are the same as R1 and R2 in the general formula (2); in general formula (2), R3 is —NHC(?O)—; and n and m each represent an integer of one or two.

Abstract: The composition comprises a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), and comprises 0.00002 to 2.0 parts by mass of the compound (B) with respect to 100 parts by mass of the compound (A), (R1—COO)n—R2—(NCO)m ??(1) g(R1—COO)n—R2—NHC(?O)NH—R2—(OCO—R1)m ??(2) wherein in general formulae (1) and (2), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contain an ether group; R1 and R2 in the general formula (1) are the same as R1 and R2 in the general formula (2); and n and m each represent an integer of one or two.

Abstract: A composition is provided including a compound (A) represented by Formula (1) and a compound (B) represented by Formula (2), wherein the compound (B) is contained in an amount of 0.00002 to 0.2 parts by mass with respect to 100 parts by mass of the compound (A): (R1—COO)n—R2—(NCO)m ??(1) (in Formula (1), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is an (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms; and n and m are each an integer of 1 or 2) (in Formula (2), R is (—R2—(OCO—R1), and R1 and R2 are the same as those in Formula (1)).

Abstract: The invention is related to a composition excellent in stability during storage and excellent stability during utilization, and related to a method of producing the composition. The composition comprises a compound (A) represented by general formula (1) and a compound (B). The compound (B) is an oligomer in which two or more molecules of the compound (A) are bonded to each other by ethylenically unsaturated groups of each compound (A). The composition contains 0.00002 to 0.2 parts by mass of the compound (B) with respect to 100 parts by mass of the compound (A), (R1—COO)n—R2—(NCO)m??(1) wherein in general formula (1), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contain an ether group; and n and in each represent an integer of one or two.

Abstract: The invention relates to a composition excellent in stability during storage and stability during utilization, and relates to a method of producing the composition. The composition includes a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), and includes 0.00002 to 0.2 parts by mass of the compound (B) with respect to 100 parts by mass of the compound (A), (R1—COO)n—R2—(NCO)m??(1) (R1—COO)n—R2—(R3—R1)m??(2) wherein in general formulae (1) and (2), R1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R2 is a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contains an ether group; R1 and R2 in the general formula (1) are the same as R1 and R2 in the general formula (2); in general formula (2), R3 is —NHC(?O)—; and n and m each represent an integer of one or two.

Abstract: An object of the present invention is to improve the stability of an ethylenically unsaturated compound having an isocyanate group in the molecule by preventing a polymerization of the ethylenically unsaturated compound. The present invention relates to a stabilizing composition for an isocyanate group-containing ethylenically unsaturated compound, comprising: an isocyanate group-containing ethylenically unsaturated compound (A) which comprises one or more isocyanate groups and one or more ethylenically unsaturated groups in the molecule; and a stabilizing agent (B) which is a compound in which at least one of the ethylenically unsaturated groups in the compound (A) is replaced with an alkyl group which may have a substituent.

Abstract: An object of the present invention is to improve the stability of an ethylenically unsaturated compound having an isocyanate group in the molecule by preventing a polymerization, a multimerization reaction and a discoloration reaction of the ethylenically unsaturated compound. The present invention relates to a stabilizing composition for an isocyanate group-containing ethylenically unsaturated compound, comprising: an isocyanate group-containing ethylenically unsaturated compound (A) which comprises one or more isocyanate groups and one or more ethylenically unsaturated groups in the molecule; and a stabilizing agent (B) which is a compound in which at least one of the ethylenically unsaturated groups in the compound (A) is replaced with an alkyl halide group or an amino alkyl group which may have a substituent.

Abstract: An object of the present invention is to improve the stability of an ethylenically unsaturated compound having an isocyanate group in the molecule by preventing a polymerization of the ethylenically unsaturated compound. The present invention relates to a stabilizing composition for an isocyanate group-containing ethylenically unsaturated compound, comprising: an isocyanate group-containing ethylenically unsaturated compound (A) which comprises one or more isocyanate groups and one or more ethylenically unsaturated groups in the molecule; and a stabilizing agent (B) which is a compound in which at least one of the ethylenically unsaturated groups in the compound (A) is replaced with an alkyl group which may have a substituent.

Abstract: The present invention provides a method for preventing polymerization, and a polymerizable monomer composition favorably used therefor that includes a (meth)acryloyl group-containing isocyanate compound and a specific polymerization inhibitor. The polymerizable monomer composition includes a (meth)acryloyl group-containing isocyanate compound and a stable free radical compound. The invention effectively prevents the polymerization of the (meth)acryloyl group-containing isocyanate compound and the occurrence of polymers due to the polymerization. Furthermore, the use of a stable free radical compound which has a vapor pressure approximate to that of the (meth)acryloyl group-containing isocyanate compound can effectively prevent polymerization in a vapor phase and a condensation phase of distillation facility.

Abstract: It is an object of the invention to provide a process of inhibiting polymerization of isocyanate group-containing, ethylenically unsaturated carboxylate compounds, and a process for producing isocyanate group-containing, ethylenically unsaturated carboxylate compounds which involves the polymerization inhibition process. The process of inhibiting polymerization of isocyanate group-containing, ethylenically unsaturated carboxylate compounds of the invention includes controlling the oxygen gas (O2) concentration in a liquid phase containing an isocyanate group-containing, ethylenically unsaturated carboxylate compound to not less than 0.5 mg/L. In a preferred embodiment, a gas containing oxygen gas (O2) is introduced to the liquid phase. In another preferred embodiment, the oxygen gas (O2) concentration in the liquid phase is measured with an electrode that is immersed in the liquid phase.

Abstract: The present invention provides a method for preventing polymerization, and a polymerizable monomer composition favorably used therefor that includes a (meth)acryloyl group-containing isocyanate compound and a specific polymerization inhibitor. The polymerizable monomer composition includes a (meth)acryloyl group-containing isocyanate compound and a stable free radical compound. The invention effectively prevents the polymerization of the (meth)acryloyl group-containing isocyanate compound and the occurrence of polymers due to the polymerization. Furthermore, the use of a stable free radical compound which has a vapor pressure approximate to that of the (meth)acryloyl group-containing isocyanate compound can effectively prevent polymerization in a vapor phase and a condensation phase of distillation facility.

Abstract: An ascorbic acid derivative, which is a compound represented by the following general formula (1) or a salt thereof: [Chemical Formula 11] (wherein X and Y each represents H or a protective group for OH, R1 and R2 each represents an alkyl group having from 1 to 19 carbon atoms, which may be linear or branched, and the total number of carbon atoms in R1 and R2 is an integer of 5 to 22).

Abstract: An ascorbic acid derivative, which is a compound represented by the following general formula (1) or a salt thereof: [Chemical Formula 11] (wherein X and Y each represents H or a protective group for OH, R1 and R2 each represents an alkyl group having from 1 to 19 carbon atoms, which may be linear or branched, and the total number of carbon atoms in R1 and R2 is an integer of 5 to 22).

Abstract: An ascorbic acid derivative, which is a compound represented by the following general formula (1) or a salt thereof: [Chemical Formula 11] (1)(wherein X and Y each represents H or a protective group for OH, R1 and R2 each represents an alkyl group having from 1 to 19 carbon atoms, which may be linear or branched, and the total number of carbon atoms in R1 R2 is an integer of 5 to 22).

Abstract: An ascorbic acid derivative, which is a compound represented by the following general formula (1) or a salt thereof: [Chemical Formula 11] (1)(wherein X and Y each represents H or a protective group for OH, R1 and R2 each represents an alkly group having from 1 to 19 carbon atoms, which may be linear or branched, and the total number of carbon atoms in R1 R2 is an integer of 5 to 22).

Abstract: The object of the present invention is to produce a 5-alkyl-oxazolidin-2,4-dione by an industrially advantageous method. The invention relates to novel process for producing a high-purity 5-alkyl-oxazolidin-2,4-dione comprising the steps of reacting a 2-hydroxycarboxylic acid amide with a carbonic acid ester in the presence of a metal alcoholate, thereby completing the reaction in one step, and then isolating the reaction product by a neutralization crystallization method.

Abstract: The object of the present invention is to produce a 5-alkyl-oxazolidin-2,4-dione by an industrially advantageous method. The invention relates to novel process for producing a high-purity 5-alkyl-oxazolidin-2,4-dione comprising the steps of reacting a 2-hydroxycarboxylic acid amide with a carbonic acid ester in the presence of a metal alcoholate, thereby completing the reaction in one step, and then isolating the reaction product by a neutralization crystallization method.