EP0143613A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Production of isocyanate compounds
Assignee: Nippon Paint Co Ltd
•
Filing: 1984-11-22
•
Granted: —
•
Expires: 2004-11-22
Abstract
Abstract Production of an alkenoyl isocyanate of the formula:wherein R is a hydrogen atom or a lower alkyl group by reacting an acrylamide of the formula:wherein R is as defined above with an oxalyl halide of the formula:wherein X is a halogen atom to give a reaction mixture comprising a haloalkanoyl isocyanate of the formula:wherein R and X are each as defined above with or without the alkenoyl isocyanate, recovering the haloalkanoyl isocyanate and, when present, the alkenoyl isocyanate separately from the reaction mixture and reacting the recovered haloalkanoyl isocyanate with a hydrogen halide-eliminating agentto give the alkenoyl isocyanate.
Inventors
- 👤 Satoshi Urano
- 👤 Ryuzo Mizuguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 16:02
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/02; C07C265/06; C07C263/00; C07C263/10; C07C263/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
A process for preparing an alkenoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group or a haloalkanoyl isocyanate of the formula: wherein R is as defined above and X is a halogen atom, which comprises reacting an acrylamide of the formula: wherein R is as defined above with an oxalyl halide of the formula: wherein X is as defined above.
Claim 2
Dependent Claim
67 words
A process for preparing an alkenoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group or a haloalkanoyl isocyanate of the formula: wherein R is as defined above and X is a halogen atom, which comprises reacting an acrylamide of the formula: wherein R is as defined above with an oxalyl halide of the formula: wherein X is as defined above.
Claim 3
Dependent Claim
19 words
The process according to claim 1, wherein R is a hydrogen atom, and the product is the haloalkanoyl isocyanate.
Claim 4
Dependent Claim
24 words
The process according to claim 1, wherein R is a lower alkyl group, and the products are the alkenoyl isocyanate and the haloalkanoyl isocyanate.
Claim 5
Dependent Claim
18 words
The process according to claim 1, wherein the reaction is carried out in the presence of hydrogen halide.
Claim 6
Dependent Claim
45 words
A process for preparing a haloalkanoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group and X is a halogen atom, which comprises reacting an alkenoyl isocyanate of the formula: wherein R is as defined above with hydrogen halide.
Claim 7
Dependent Claim
45 words
A process for preparing a haloalkanoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group and X is a halogen atom, which comprises reacting an alkenoyl isocyanate of the formula: wherein R is as defined above with hydrogen halide.
Claim 8
Dependent Claim
13 words
The process according to claim 5, wherein the hydrogen halide is hydrogen chloride.
Claim 9
Dependent Claim
53 words
A process for preparing an alkenoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group, which comprises reacting a haloalkanoyl isocyanate of the formula: wherein R is is a hydrogen atom or a lower alkyl group and X is a halogen atom with a hydrogen halide-eliminating agent.
Claim 10
Dependent Claim
53 words
A process for preparing an alkenoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group, which comprises reacting a haloalkanoyl isocyanate of the formula: wherein R is is a hydrogen atom or a lower alkyl group and X is a halogen atom with a hydrogen halide-eliminating agent.
Claim 11
Dependent Claim
106 words
A process for preparing an alkenoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group which comprises reacting an acrylamide of the formula: wherein R is as defined above with an oxalyl halide of the formula: wherein X is a halogen atom to give a reaction mixture comprising a haloalkanoyl isocyanate of the formula: wherein R and X are each as defined above with or without the alkenoyl isocyanate, recovering the haloalkanoyl isocyanate and, when present, the alkenoyl isocyanate separately from the reaction mixture and reacting the recovered haloalkanoyl isocyanate with a hydrogen halide-eliminating agent to give the alkenoyl isocyanate.
Claim 12
Dependent Claim
106 words
A process for preparing an alkenoyl isocyanate of the formula: wherein R is a hydrogen atom or a lower alkyl group which comprises reacting an acrylamide of the formula: wherein R is as defined above with an oxalyl halide of the formula: wherein X is a halogen atom to give a reaction mixture comprising a haloalkanoyl isocyanate of the formula: wherein R and X are each as defined above with or without the alkenoyl isocyanate, recovering the haloalkanoyl isocyanate and, when present, the alkenoyl isocyanate separately from the reaction mixture and reacting the recovered haloalkanoyl isocyanate with a hydrogen halide-eliminating agent to give the alkenoyl isocyanate.
Claim 13
Dependent Claim
19 words
A haloalkanoyl isocyanate of the formula: wherein R is a lower alkyl group and X is a halogen atom.
Claim 14
Dependent Claim
19 words
A haloalkanoyl isocyanate of the formula: wherein R is a lower alkyl group and X is a halogen atom.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.