Method of producing resorcinol resins by reacting with n-methylol caprolactam
Abstract
Abstract A METHOD OF PRODUCING RESORCINOL RESINS, COMPRISING POLYCONDENSATION OF RESORCINOL, ALKYLRESORCINOL COMPOUNDS OR OF A MIXTURE THEREOF, WITH N-METHYLOLCAPROLACTAM OR WITH A MIXTURE OF N-METHYLOLCAPROLACTAM WITH N,N-DIMETHYLCARBAMIDE. THE MOLAR RATIO OF N-METHYLOLCAPROLACTAM WITH SAID PHENOLIC COMPOUNDS IS EQUAL TO 0.3-1:1, RESPECTIVELY, WHILE THAT OF N-METHYLOLCAPROLACTAM WITH N,N-DIMETHYLOLCARBAMIDE AND WITH PHENOLIC COMPOUNDS IS EQUAL TO 0.1-0.4:0.1-0.4:1. RESPECTIVELY. THE POLYCONDENSATION PROCESS OCCURS EITHER IN A SOLUTION THE HEREIN-DISCLOSED METHOD IS INSTRUMENTAL IN PRODUCING PRACTICALLY ANHYDROUS RESORCINOL RESIN FEATURING MORE HOMOGENEOUS CHEMICAL STRUCTURE THEREOF.
Inventors
- 👤 A Aarna
- 👤 K Kiisler
- 👤 P Kristyanson
- 👤 J Tanner
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |