US3100199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyacetals from halogenated unsaturated carboxylic acid esters
Assignee: Diamond Shamrock Corp
•
Filing: 1958-03-12
•
Granted: 1963-08-06
•
Expires: 1978-03-12
Abstract
No abstract record available.
Inventors
- 👤 James W L Fordham
- 👤 George H Mccain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:28
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/20; C08F8/00; C08F8/12; C08F8/48; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE METHOD OF PREPARING A POLYMER WHICH COMPRISES THE STEPS OF POLYMERIZING A POLYMERIZABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORACETATE MONOMER AND VINYL TRIFLUORACETATE MONOMER AND MIXTURES OF SUCH MONOMERS WITH NO MORE THAN ABOUT 10% BY WEIGHT OF VINYL ACETATE, HYDROLYZING THE RESULTANT POLYMER IN THE PRESENCE OF A SOLVENT FOR THE POLYMER INERT IN BASIC SOLUTIONS, THE SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN AND DIOXANE, CARRYING OUT THE HYDROLYSIS IN A REFLUXING ANHYDROUS ALKALI METAL ALCOHOLATE SOLUTION, NEUTRALIZING THE RESULTANT POLYVINYL ALCOHOL AND REACTING IT WITH AN ALDEHYDE IN A SLURRY USING A SOLVENT IN WHICH THE DESIRED ACETAL IS INSOLUBLE, IN THE PRESENCE OF AN ESTERIFICATION CATALYST SOLUBLE IN THE SLURRYING, AT THE REFLUX TEMPERATURE OF THE REACTION MIXTURE, USING A STOICHIOMETRIC EXCESS OF THE ALDEHYDE AND ABIUT 1%-10% BY WEIGHT OF A CATALYST SELCTED FROM THE GROUP CONSISTING OF OXALIC ACID, CONCENTRATED SULFURIC ACID, HYDROCHLORIC ACID, P-TOLUENE SULFONIC ACID.
Claim 2
Independent Claim
159 words
THE METHOD OF PREPARING A POLYMER WHICH COMPRISES THE STEPS OF POLYMERIZING A POLYMERIZABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORACETATE MONOMER AND VINYL TRIFLUORACETATE MONOMER AND MIXTURES OF SUCH MONOMERS WITH NO MORE THAN ABOUT 10% BY WEIGHT OF VINYL ACETATE, HYDROLYZING THE RESULTANT POLYMER IN THE PRESENCE OF A SOLVENT FOR THE POLYMER INERT IN BASIC SOLUTIONS, THE SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN AND DIOXANE, CARRYING OUT THE HYDROLYSIS IN A REFLUXING ANHYDROUS ALKALI METAL ALCOHOLATE SOLUTION, NEUTRALIZING THE RESULTANT POLYVINYL ALCOHOL AND REACTING IT WITH AN ALDEHYDE IN A SLURRY USING A SOLVENT IN WHICH THE DESIRED ACETAL IS INSOLUBLE, IN THE PRESENCE OF AN ESTERIFICATION CATALYST SOLUBLE IN THE SLURRYING, AT THE REFLUX TEMPERATURE OF THE REACTION MIXTURE, USING A STOICHIOMETRIC EXCESS OF THE ALDEHYDE AND ABIUT 1%-10% BY WEIGHT OF A CATALYST SELCTED FROM THE GROUP CONSISTING OF OXALIC ACID, CONCENTRATED SULFURIC ACID, HYDROCHLORIC ACID, P-TOLUENE SULFONIC ACID.
References Cited (Backward Citations)
US1746665A
Cited
DE514593C
Cited
US2108857A
Cited
US2109883A
Cited
FR827867A
Cited
US2325513A
Cited
US2561458A
Cited
US2610360A
Cited
US2915504A
Cited
US2862908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-05 | 1967-02-04 | 1967-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-05 | 1971-02-04 | 1971-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-05 | 1975-02-04 | 1975-08-06 | $7700.00 | Window Closed / Lapsed |