Rosin size and paper containing said size
Abstract
Abstract A MATERIAL SUCH AS A SALT OF ROSIN OR A SALT OF AN ADDUCT REACTION PRODUCT OF ROSIN AND AN ACIDIC COMPOUND CONTAINING THE >C=C(-)-C(=O)- GROUP, SUCH AS MALEIC ANHYDRIDE AND FUMARIC ACID, OR AN ALKALINE MATERIAL, SUCH AS POTASSIUM HYDROXIDE, IS DISSOLVED IN WATER. THE RESULTING AQUEOUS SOLUTION IS MIXED WITH A SOLUTION OF A WATER-IMMISCIBLE ORGANIC SOLVENT, SUCH AS BENZENE, WHICH HAS DISSOLVED THEREIN ROSIN-BASE MATERIAL COMPRISED OF 0-95% ROSIN AND 100-5% OF AN ADDUCT REACTION PRODUCT OF ROSIN AND AN ACIDIC COMPOUND CONTAINING THE >C=C(-)-C(=O)- GROUP, SUCH AS THAT OBTAINED BY ADDUCTING WOOD ROSIN WITH FUMARIC ACID; THE AMOUNT OF SAID MATERIAL DISSOLVED IN WATER BEING SUFFICIENT TO PROVIDE AN AMOUNT OF SAPONIFIED ROSIN-BASE MATERIAL, REPRESENTED AS A PERCENTAGE OF AVAILABLE CARBOXYL GROUPS SAPONIFIED, OF FROM ABOUT 0.5% TO ABOUT 20%. THE UNSTABLE MIXTURE IS HOMOGENIZED TO PRODUCE A STABLE EMULSION AND THEN THE ORGANIC SOLVENT IS REMOVED BY DISTILLATION TO RESULT IN A STABLE AQUEOUS DISPERSION.
Inventors
- 👤 Robert W Davison
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |