US3678065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydroxymethyl vinyl oxazoline
Assignee: Commercial Solvents Corp
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Filing: 1970-12-09
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Granted: 1972-07-18
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Expires: 1990-12-09
Abstract
Abstract A process for the production of hydroxymethyl vinyl oxazolines corresponding to the formula: WHERE R is methyl, ethyl, or hydroxymethyl and R'' is hydrogen or methyl, comprising reacting an alkanolamine, in which to the carbon atom adjacent to the amino group there are bonded three hydroxyalkyl groups, or two hydroxyalkyl groups and an alkyl group, with an ester of acrylic acid or methacrylic acid in the presence of a catalyst and a polymerization inhibitor, thereby forming an amide, and heating said amide rapidly and briefly to within about 165*-210* C in the presence of additional polymerization inhibitor, thereby forming said hydroxymethyl vinyl oxazoline.
Inventors
- 👤 John A Frump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:00
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/10; C07D263/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
11 words
The process of claim 1 wherein said catalyst is lithium metal.
Claim 2
Dependent Claim
10 words
The process of claim 1 wherein said alkanolamine is 2-amino-2-methyl-1,3-propanediol.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein said alkanolamine is 2-amino-2-ethyl-1,3-propanediol.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein said alkanolamine is 2-amino-2-hydroxymethyl-1,3-propanediol.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said lower alkyl methacrylate ester is methyl methacrylate.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said lower alkyl methacrylate ester is ethyl methacrylate.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein said ester is methyl acrylate.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein said ester is ethyl acrylate.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein said amide is heated by introducing it incrementally into a heated reaction zone.
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein the residence time in step (b) is within about 10 to 30 minutes.
References Cited (Backward Citations)
US2831858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |