Showa Denko K.k.

Resonac Corporation

Norihito Nishimura

Makoto Saito

Katsutoshi Ohno

Hiroshi Ishii

Akira Shibuya

Shinichi Yorozuya

Yoshiaki Miyota

Yoshio Fujiwara

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),(R—COO)—R—(NCO)  (1)(R—COO)—R—NHC(═O)NH—R—(OCO—R)  (2)wherein in general formulae (1) and (2), Ris an ethylenically unsaturated group having 2 to 7 carbon atoms; Ris a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contain an ether group; Rand Rin the general formula (1) are the same as Rand Rin the general formula (2); and n and m each represent an integer of one or two.

Composition, production method for composition, and production method for unsaturated compound

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): (R&#x2014;COO)&#x2014;R&#x2014;(NCO). . . (1) (in Formula (1), Ris an ethylenically unsaturated group having 2 to 7 carbon atoms; Ris 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 (&#x2014;R&#x2014;(OCO&#x2014;R), and Rand Rare the same as those in Formula (1)).

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),(R&#x2014;COO)&#x2014;R&#x2014;(NCO)&#x2003;&#x2003;(1)(R&#x2014;COO)&#x2014;R&#x2014;(R&#x2014;R)&#x2003;&#x2003;(2)wherein in general formulae (1) and (2), Ris an ethylenically unsaturated group having 2 to 7 carbon atoms; Ris a (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms and optionally contains an ether group; Rand Rin the general formula (1) are the same as Rand Rin the general formula (2); in general formula (2), Ris &#x2014;NHC(&#x2550;O)&#x2014;; and n and m each represent an integer of one or two.

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.

Stabilized isocyanate group-containing ethylenically unsaturated compound

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, Rand Reach 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 Rand Ris an integer of 5 to 22).

Stabilized ascorbic acid derivative

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, Rand Reach 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 RRis an integer of 5 to 22).

Stabilized ascorbic acid derivatives

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.

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Kawasaki, Japan

Norihito Nishimura