Adhesive for regenerated cellulose
Abstract
Abstract A novel adhesive for sealing or joining sheets or films of regenerated cellulose or fiber-reinforced regenerated cellulose comprises a fluid, organic solvent solution having a solute comprising a film-forming polymeric polyisocyanate, and a curing agent for the polyisocyanate including a plasticizer ingredient, such as a polyol or a reaction product of a polyol with ethylene oxide or the like, and a surfactant ingredient, such as a fatty acid partial ester of sorbitan. The coating composition may be used to seam sheets of regenerated cellulose or paper-reinforced regenerated cellulose into tubular form or in forming cemented end closures on tubes of regenerated cellulose or paperreinforced regenerated cellulose. The adhesive composition is preferably applied in a very thin film, allowed to penetrate into the regenerated cellulose substrate, and cured by heating at an elevated temperature, e.g. 300*-320* F., for about 20-30 sec., more or less.
Inventors
- 👤 Albin F Turbak
- 👤 Henry J Rose
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |