US3215731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of glycol monoesters of acrylic and methacrylic acids
Assignee: Dow Chemical Co
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Filing: 1963-12-11
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Granted: 1965-11-02
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Expires: 1983-12-11
Abstract
No abstract record available.
Inventors
- 👤 Charles R Bearden
- 👤 Jr Sampse R Hargis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:19
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR THE PREPARATION OF A 2-HYDROXY ETHYL ESTER OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, WHICH PROCESS COMPRISES CONTACTING (1) A MONOETHYLENICALLY UNSATURATED ALIPHATIC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, AND (2) ETHYLENE CARBONATE WITH ONE ANOTHER AND WITH A TERTIARY AMINE HAVING A DISSOCIATION CONSTANT BETWEEN 1X10**-8 AND 1X10**-10 AND AN INSOLUBLE STRONGLY BASIC QUATERNARY AMMONIUM ANION EXCHANGE RESIN THAT IS THE REACTION PRODUCT OF AN INSOLUBLE CROSS-LINKED COPOLYMER OF A PREDOMINANT AMOUNT OF A MONOVINYL AROMATIC HYDROCARBON AND A MINOR AMOUNT OF A DIVINYL AROMATIC HYDROCARBON HAVING HALOMETHYL RADICALS ON AROMATIC NUCLEI IN THE COPOLYMER AND A TERTIARY AMINE, AT REACTION TEMPERATURES BETWEEN ABOUT 80* AND 125*C. AND RECOVERING THE 2-HYDROXY EHTYL ESTER PRODUCT.
Claim 2
Dependent Claim
124 words
A PROCESS FOR THE PREPARATION OF A 2-HYDROXY ETHYL ESTER OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, WHICH PROCESS COMPRISES CONTACTING (1) A MONOETHYLENICALLY UNSATURATED ALIPHATIC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, AND (2) ETHYLENE CARBONATE WITH ONE ANOTHER AND WITH A TERTIARY AMINE HAVING A DISSOCIATION CONSTANT BETWEEN 1X10**-8 AND 1X10**-10 AND AN INSOLUBLE STRONGLY BASIC QUATERNARY AMMONIUM ANION EXCHANGE RESIN THAT IS THE REACTION PRODUCT OF AN INSOLUBLE CROSS-LINKED COPOLYMER OF A PREDOMINANT AMOUNT OF A MONOVINYL AROMATIC HYDROCARBON AND A MINOR AMOUNT OF A DIVINYL AROMATIC HYDROCARBON HAVING HALOMETHYL RADICALS ON AROMATIC NUCLEI IN THE COPOLYMER AND A TERTIARY AMINE, AT REACTION TEMPERATURES BETWEEN ABOUT 80* AND 125*C. AND RECOVERING THE 2-HYDROXY EHTYL ESTER PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |