Composition, production method for composition, and production method for unsaturated compound
AssigneeShowa Denko K.K.
InventorsNorihito NISHIMURA, Katsutoshi OHNO
Life of this patent
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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.
Claims15
A composition comprising:
- a compound (A) represented by general formula (1) and
- a compound (B) represented by general formula (2),
- wherein the composition 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 the 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 comprises 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 1 or 2.
A method of producing a composition, comprising steps of:
- producing a mixture which comprises a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2) and which comprises more than 2.0 parts by mass of the compound (B) with respect to 100 parts by mass of the compound (A);
- and
- purifying the mixture by a distillation process at a reflux ratio of 2.0 to 4.0, a pressure of 1.0 to 10.0 kPa and a distillation temperature of 90 to 140° C.,
- wherein the purifying step comprises
- a vacuum breaking step of supplying dry nitrogen gas having a dew point of −30° C. or lower into a distillation apparatus after distillation process and returning the pressure in the distillation apparatus to atmospheric pressure, and
- a filling step of storing the purified product in the distillation apparatus after the distillation process in a container and filling the gas phase portion in the container with dry nitrogen gas having a dew point of −30° C. or lower,
- (R1—COO)n—R2—(NCO)m (1)
- (R1—COO)n—R2—NHC(═O)NH—R2—(OCO—R1)m (2)
- wherein in the 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 1 or 2.
Dependencies are inferred from the claim text.