Water-degradable resins containing recurring,contiguous,polymerized glycolide units and process for preparing same
Abstract
Abstract THIS INVENTION PROVIDES WATER-DEGRADABLE OR HYDROLYZABLE TERMOPLASTIC OR THERMOSET RESINS CONTAINING BLOCKS OF POLYGLYCOLIC ACID UNITS AND TO A PROCESS FOR PREPARING THE SAME. MORE PARTICULARLY, THE INVENTION PROVIDES A PROCESS RELATING TO THE COPOLYMERIZATION OF EITHER A RESINOUS PREPOLYMER OR A POLYMERIZABLE MONOMER WITH GLYCOLIDE TO PRODUCE A PLURALITY OF CANTIGOUS GLYCOLIC ACID UNITS WHICH RENDERS THE RESULTANT POLYMER CONTAINING SUCH POLYGLYCOLIC ACID UNITS WATER-DEGRADAGLE. STILL MORE PARTICULARLY, THE INVENTION PROVIDES A THERMOPLASTIC OR RESINOUS POLYMERIC MATERIAL MANUFACTURED BY INTRODUCING OF FROM ABOUT 2% TO ABOUT 35% BY WEIGHT, OF GLYCOLIDE INTO EITHER A POLYMERIZABLE MONOMER OR RESINOUS PREPOLYMER AND EFFECTING BLOCK COMPLYMERIZATION SO AS TO OBTAIN A WATER-DEGRADABLE POLYMERIC MATERIAL. RESULTANT RESIN CONTAINING RECURRING, CONTIGUOUS, POLYMERIZED GLYCOLIDE UNITS FINDS UTILITY AS A DISPOSABLE PACKAGING MATERIAL OR AS A SLOW RELEASE ENCAPSULATING MATERIAL FOR INSECTICIDES AND MEDICINALS, THICKENING AGENTS, AND SURFACTANTS FOR FOOD PACKAGING.
Inventors
- 👤 I Updegraff
- 👤 E Schmitt
- 👤 T Suen
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |