Production of textile materials with improved flame retardance
Abstract
Abstract THE FLAME RETARDANT PROPERTIES OF TEXTILE MATERIALS WHICH HAVE BEEN REACTED WITH PHOSPHORUS-CONTAINING COMPOUNDS OR SALTS THEREOF, ARE IMPROVED BY AN AFTER-TREATMENT OF THE TEXTILE MATERIAL WITH A SALT OF A HEAVY METAL, FOR EXAMPLE, TITANIUM TETRACHLORIDE. THE TREATMENT NOT ONLY IMPARTS INCREASED FLAME RETARDANCE TO TREATED TEXTILE MATERIALS BUT PROTECTS THE IMPARTED FLAME RETARDANCE AGAINST SUBSEQUENT IMPAIRMENT BY ION EXCHANGE WITH CALCIUM AND OTHER ELEMENTS IN WATER. CONSEQUENTLY, THE TREATMENT EXTENDS THE EFFECTIVE LIFE OF FLAME RETARDANCE OVER A LARGE NUMBER OF LAUNDERINGS. THE TREATMENT IS APPLICABLE TO CELLULOSIC FIBERS, E.G., COTTON OR RAYON, AS WELL AS TO WOOL, SILK AND OTHER NATURAL AND MAN-MADE FIBERS.
Inventors
- 👤 Blanc R Le
Bibliographic Details
Claims Analysis
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |