US2943072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the gelation of filled diisocyanate modified polyester
Assignee: Armstrong World Industries Inc
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Filing: 1955-03-15
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Granted: 1960-06-28
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Expires: 1975-03-15
Abstract
No abstract record available.
Inventors
- 👤 Alan K Forsythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:17
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08L75/06; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/088; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/0091; Y; Y10; Y10S; Y10S74/00; Y10S74/10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18128; Y10T74/18136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF CONTROLLING THE GELATION OF A DIISOCYANATE MODIFIED POLYESTER WHICH COMPRISES HEATING A SOLID FILLER TO AN ELEVATED TEMPERATURE TO REMOVE WATER THEREFROM, BLENDING AN ORGANIC DIISOCYANATE WHEREIN THE SOLE REACTIVE GROUPS ARE ISOCYANATE GROUPS WITH A LINEAR POLYESTER CONTAINING HYDROGEN ATOMS REACTIVE WITH SAID DIISOCYANATE, HEATING SAID BLEND TO A TEMPERATURE OF LESS THAN ABOUT 180*F. TO MAINTAIN SAID BLEND IN AN UNGELLED STATE, ADDING SAID BLEND TO SAID HEATED FILLER IN AN AMOUNT TO PROVIDE A WEIGHT RATIO OF POLYESTER TO FILLER NOT GREATER THAN ABOUT 1.2:1, AGITATING THE MIXTURE OF FILLER AND POLYESTER AT AN ELEVATED TEMPERATURE OF BETWEEN ABOUT 180*320*F., AND MAINTAINING SAID CONDITIONS OF AGITATION AND TEMPERATURE UNTIL SAID POLYESTER HAS FORMED A GEL ON THE SURFACE OF SAID FILLER.
Claim 2
Independent Claim
127 words
THE METHOD OF CONTROLLING THE GELATION OF A DIISOCYANATE MODIFIED POLYESTER WHICH COMPRISES HEATING A SOLID FILLER TO AN ELEVATED TEMPERATURE TO REMOVE WATER THEREFROM, BLENDING AN ORGANIC DIISOCYANATE WHEREIN THE SOLE REACTIVE GROUPS ARE ISOCYANATE GROUPS WITH A LINEAR POLYESTER CONTAINING HYDROGEN ATOMS REACTIVE WITH SAID DIISOCYANATE, HEATING SAID BLEND TO A TEMPERATURE OF LESS THAN ABOUT 180*F. TO MAINTAIN SAID BLEND IN AN UNGELLED STATE, ADDING SAID BLEND TO SAID HEATED FILLER IN AN AMOUNT TO PROVIDE A WEIGHT RATIO OF POLYESTER TO FILLER NOT GREATER THAN ABOUT 1.2:1, AGITATING THE MIXTURE OF FILLER AND POLYESTER AT AN ELEVATED TEMPERATURE OF BETWEEN ABOUT 180*320*F., AND MAINTAINING SAID CONDITIONS OF AGITATION AND TEMPERATURE UNTIL SAID POLYESTER HAS FORMED A GEL ON THE SURFACE OF SAID FILLER.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |