Patent US3839293A successfully refreshed from Google Patents.
US3839293A
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Method for producing condensation polymers
Assignee: Lyondell Chemical Technology LP
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Filing: 1972-12-12
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Granted: 1974-10-01
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Expires: 1992-12-12
Abstract
Abstract Condensation polymerizations are carried out by feeding at least one primary polymerizable feed composition, which is continually varying in compositional content, from a primary feed source to a polymerization zone while simultaneously feeding at least one different secondary feed composition from a secondary feed source to said primary feed source and polymerizing the reactants mixture present in the polymerization zone.
Inventors
- 👤 R Knopf
- 👤 K Hoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:59
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A PROCESS FOR CONTROLLING THE MOLECULAR WEIGHT DISTRIBUTION OF CONDENSATION POLYMERS PRODUCED BY A REACTANT STARVED CONDENSATION POLYMERIZATION REACTION COMPRISING INTRODUCING AT LEAST ONE PRIMARY POLYMERIZABLE FEED COMPOSITION COMPRISING CONDENSATION POLYMERIZABLE REACTANTS AND CHAIN TERMINATOR FROM AT LEAST ONE PRIMRY FEED SOURCE TO A POLYMERIZATION ZONE CONTAINING REACTANT CONDENSATION POLYMERIZABLE THEREWITH WHIL SIMULTANEOUSLY FEEDING AT LEAST ONE SECONDARY FEED COMPOSITION FROM AT LEAST ONE SECONDARY FEED SOURCE TO AT LEAST ONE OF SAID PRIMARY FEED SOURCES, THE COMPOSITIONAL CONTENT OF THE PRIMARY POLYMERIZABLE FEED COMPOSITION IN SAID PRIMARY FEED SOURCE CONTINUALLY CHANGING DURING THE INTRODUCTION OF SAID SECONDARY FEED COMPOSITION THERETO, AND SIMULTANEOUSLY CONDENSATION POLYMERIZING THE REACTANTS MIXTURE IN THE POLYMERIZATION ZONE.
Claim 2
Dependent Claim
112 words
A PROCESS FOR CONTROLLING THE MOLECULAR WEIGHT DISTRIBUTION OF CONDENSATION POLYMERS PRODUCED BY A REACTANT STARVED CONDENSATION POLYMERIZATION REACTION COMPRISING INTRODUCING AT LEAST ONE PRIMARY POLYMERIZABLE FEED COMPOSITION COMPRISING CONDENSATION POLYMERIZABLE REACTANTS AND CHAIN TERMINATOR FROM AT LEAST ONE PRIMRY FEED SOURCE TO A POLYMERIZATION ZONE CONTAINING REACTANT CONDENSATION POLYMERIZABLE THEREWITH WHIL SIMULTANEOUSLY FEEDING AT LEAST ONE SECONDARY FEED COMPOSITION FROM AT LEAST ONE SECONDARY FEED SOURCE TO AT LEAST ONE OF SAID PRIMARY FEED SOURCES, THE COMPOSITIONAL CONTENT OF THE PRIMARY POLYMERIZABLE FEED COMPOSITION IN SAID PRIMARY FEED SOURCE CONTINUALLY CHANGING DURING THE INTRODUCTION OF SAID SECONDARY FEED COMPOSITION THERETO, AND SIMULTANEOUSLY CONDENSATION POLYMERIZING THE REACTANTS MIXTURE IN THE POLYMERIZATION ZONE.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein there is a single primary feed zone and a single secondary feed zone.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1 wherein there is a single primary feed zone and a plurality of secondary feed zones.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1 wherein there are a plurality of primary feed zones and a single secondary feed zone.
Claim 6
Dependent Claim
23 words
A process as claimed in claim 1 wherein there are a plurality of primary feed zones and a plurality of secondary feed zones.
Claim 7
Dependent Claim
16 words
A process as claimed in claim 1 wherein the condensation polymer is a urethane containing polymer.
Claim 8
Dependent Claim
14 words
A process as claimed in claim 6 wherein the urethane polymer is an elastomer.
Claim 9
Dependent Claim
14 words
A process as claimed in claim 1 wherein the condensation polymer is a polyurea.
Claim 10
Dependent Claim
11 words
A condensation polymer produced by the process claimed in claim 1.
References Cited (Backward Citations)
US3427287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |