US3222429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process using benzoin/monocarboxylic acid catalyst system
Assignee: Monsanto Chemicals Ltd
•
Filing: 1962-08-09
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Granted: 1965-12-07
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Expires: 1982-08-09
Abstract
No abstract record available.
Inventors
- 👤 Boyd Thomas
- 👤 Heinz J Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:40
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS WHICH COMPRISES (1) DISSOLVING A CATALYST MIXTURE CONSISTING OF: (A) 0.02-0.08 PART BY WEIGHT OF BENZOIN, (B) AT LEAST 0.05 PART BY WEIGHT OF A MONOCARBOXYLIC ACID HAVING A DISSOCIATION CONSTANT BELOW 1.0X10-4 AT 25*C., AND (C) UP TO 0.1 PART BY WEIGHT OF A PEROXY COMPOUND HAVING A HALF-LIFE OF AT LEAST 10 HOURS IN BENZENE AT 100*C. IN 100 PARTS BY WEIGHT OF A POLYMERIZABLE MATERIAL OF THE GROUP CONSISTING OF A MONOMVINYL AROMATIC HYDROCARBON, AN AR-HALO MONOVINYL AROMATIC HYDROCARBON, MIXTURES THEREOF WITH ONE ANOTHER, AND MIXTURES THEREOF WITH LESSER AMOUNTS OF COPOLYMERIZABLE MONOMERS AND (2) HEATING TO POLYMERIZE THE POLYMERIZABLE MATERIAL; SAID PROCESS BEING CONDUCTED AT 180-220*C. DURING THE FINISHING STAGE OF THE REACTION.
Claim 2
Dependent Claim
119 words
A PROCESS WHICH COMPRISES (1) DISSOLVING A CATALYST MIXTURE CONSISTING OF: (A) 0.02-0.08 PART BY WEIGHT OF BENZOIN, (B) AT LEAST 0.05 PART BY WEIGHT OF A MONOCARBOXYLIC ACID HAVING A DISSOCIATION CONSTANT BELOW 1.0X10-4 AT 25*C., AND (C) UP TO 0.1 PART BY WEIGHT OF A PEROXY COMPOUND HAVING A HALF-LIFE OF AT LEAST 10 HOURS IN BENZENE AT 100*C. IN 100 PARTS BY WEIGHT OF A POLYMERIZABLE MATERIAL OF THE GROUP CONSISTING OF A MONOMVINYL AROMATIC HYDROCARBON, AN AR-HALO MONOVINYL AROMATIC HYDROCARBON, MIXTURES THEREOF WITH ONE ANOTHER, AND MIXTURES THEREOF WITH LESSER AMOUNTS OF COPOLYMERIZABLE MONOMERS AND (2) HEATING TO POLYMERIZE THE POLYMERIZABLE MATERIAL; SAID PROCESS BEING CONDUCTED AT 180-220*C. DURING THE FINISHING STAGE OF THE REACTION.
References Cited (Backward Citations)
US2675362A
Cited
US2886553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |