US3226370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular polymerization in aqueous emulsion of normally crystalline vinylidene chloride
Assignee: Dow Chemical Co
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Filing: 1962-06-25
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Granted: 1965-12-28
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frank M Poindexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A PROCESS FOR PRODUCTION OF NORMALLY CRYSTALLINE VINYLIDENE CHLORIDE POLYMER IN DISCRETE PARTICULATE FORM WHICH COMPRISES FREE RADICAL POLYMERRIZATION OF A POLYMERIZABLE MATERIAL CONTAINING AT LEAST ABOUT 70 WEIGHT PERCENT OF VINYLIDENE CHLORIDE WITH ANY REMAINDER BEING SELECTED FROM THE GROUP CONTAINING OF VINYL CHLORIDE, ACRYLONITRILE, ACRYLIC ACID, METHYL ACRYLATE, ETHYL ACRYLATE, METHYL METHACRYLATE AND MIXTURES THEREOF IN AN AQUEOUS EMULSION CONTAINING (1) A PEROXYGEN COMPOUND, (2) A FERRIC SALT OF AN INORGANIC ACID IN AMOUNT HAVING AN IRON CONTENT CORRESPONDING TO AT LEAST ABOUT 0.002 WEIGHT PERCENT OF THE COMBINED WEIGHT OF THE POLYMERIZABLE MATERIAL, (3) A MINERAL ACID IN AMOUNT SUFFICIENT TO GIVE THE POLYMERIZATION MIXTURE A PH VALUE BETWEEN ABOUT 1.5 AND 3, AND (4) A DIALKYL ESTER OF SODIUM SULFOSUCCINIC ACID WHEREIN EACH ALKYL GROUP CONTAINS FROM 4 TO 8 CARBON ATOMS, IN AMOUNTS OF AT LEAST ABOUT 1.5 WEIGHT PERCENT BASED ON THE COMBINED WEIGHT OF THE POLYMERIZABLE MIXTURE.
Claim 2
Dependent Claim
154 words
A PROCESS FOR PRODUCTION OF NORMALLY CRYSTALLINE VINYLIDENE CHLORIDE POLYMER IN DISCRETE PARTICULATE FORM WHICH COMPRISES FREE RADICAL POLYMERRIZATION OF A POLYMERIZABLE MATERIAL CONTAINING AT LEAST ABOUT 70 WEIGHT PERCENT OF VINYLIDENE CHLORIDE WITH ANY REMAINDER BEING SELECTED FROM THE GROUP CONTAINING OF VINYL CHLORIDE, ACRYLONITRILE, ACRYLIC ACID, METHYL ACRYLATE, ETHYL ACRYLATE, METHYL METHACRYLATE AND MIXTURES THEREOF IN AN AQUEOUS EMULSION CONTAINING (1) A PEROXYGEN COMPOUND, (2) A FERRIC SALT OF AN INORGANIC ACID IN AMOUNT HAVING AN IRON CONTENT CORRESPONDING TO AT LEAST ABOUT 0.002 WEIGHT PERCENT OF THE COMBINED WEIGHT OF THE POLYMERIZABLE MATERIAL, (3) A MINERAL ACID IN AMOUNT SUFFICIENT TO GIVE THE POLYMERIZATION MIXTURE A PH VALUE BETWEEN ABOUT 1.5 AND 3, AND (4) A DIALKYL ESTER OF SODIUM SULFOSUCCINIC ACID WHEREIN EACH ALKYL GROUP CONTAINS FROM 4 TO 8 CARBON ATOMS, IN AMOUNTS OF AT LEAST ABOUT 1.5 WEIGHT PERCENT BASED ON THE COMBINED WEIGHT OF THE POLYMERIZABLE MIXTURE.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |