Patent US2646340A successfully refreshed from Google Patents.
US2646340A
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Process of treating natural cellulose textiles to partially esterify them and then treating with a resin condensation product and products resulting therefrom
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-10-01
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Granted: 1953-07-21
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Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Nickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:51
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2369; Y10T442/2393
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
THE METHOD OF PREPARING IMPROVED WRINKLE OR CREASE RESISTANT CELLULOSIC TEXTILE MATERIALS WHICH COMPRISES TREATING A NATURAL CELLULOSE TEXTILE MATERIAL WITH AN 80 TO 100% FORMIC ACID SOLUTION UNTIL FROM 1 TO 10% OF THE HYDROXYL GROUPS OF THE CELLULOSE ARE ESTERFIED; REMOVING SUBSTANTIALLY ALL OF THE UNREACTED FORMIC ACID FROM SAID MATERIAL; IMPREGNATING SAID MATERIAL WITH AN AQUEOUS SOLUTION COMPRISING A LATENT CURING CATALYST AND FROM ABOUT 6 TO 20% BY WEIGHT OF A SUBSTANTIALLY UNPOLYMERIZED UREAFORMALDEHYDE CONDENSATION PRODUCT; EXTRACTING SAID MATERIAL TO DEPOSIT FROM ABOUT 6 TO 16% BY WEIGHT, BASED ON THE DRY MATERIAL, OF SAID CONDENSATION PRODUCT; AND THEN INSOLUBILIZING SAID CONDENSATION PRODUCT BY HEATING SAID MATERIAL AT A TEMPERATURE BETWEEN ABOUT 275 AND 350* F.
Claim 2
Independent Claim
120 words
THE METHOD OF PREPARING IMPROVED WRINKLE OR CREASE RESISTANT CELLULOSIC TEXTILE MATERIALS WHICH COMPRISES TREATING A NATURAL CELLULOSE TEXTILE MATERIAL WITH AN 80 TO 100% FORMIC ACID SOLUTION UNTIL FROM 1 TO 10% OF THE HYDROXYL GROUPS OF THE CELLULOSE ARE ESTERFIED; REMOVING SUBSTANTIALLY ALL OF THE UNREACTED FORMIC ACID FROM SAID MATERIAL; IMPREGNATING SAID MATERIAL WITH AN AQUEOUS SOLUTION COMPRISING A LATENT CURING CATALYST AND FROM ABOUT 6 TO 20% BY WEIGHT OF A SUBSTANTIALLY UNPOLYMERIZED UREAFORMALDEHYDE CONDENSATION PRODUCT; EXTRACTING SAID MATERIAL TO DEPOSIT FROM ABOUT 6 TO 16% BY WEIGHT, BASED ON THE DRY MATERIAL, OF SAID CONDENSATION PRODUCT; AND THEN INSOLUBILIZING SAID CONDENSATION PRODUCT BY HEATING SAID MATERIAL AT A TEMPERATURE BETWEEN ABOUT 275 AND 350* F.
Claim 3
Dependent Claim
112 words
A WRINKLE AND CREASE RESISTANT CELLULOSIC TEXTILE MATERIAL CONSISTING OF PARTIALLY ESTERIFIED NATURAL CELLULOSE TEXTILE FIBERS SELECTED FROM THE GROUP CONSISTING OF PARTIAL FORMYL, PARTIAL ACETYL AND PARTIAL PROPIONYL ESTERS OF NATURAL CELLULOSE, IN WHICH FROM 1 TO 10% OF THE HYDROXYL GROUPS OF THE NATURAL CELLULOSE HAVE BEEN ESTERIFIED, IMPREGNATED WITH FROM ABOUT 6 TO 16% BY WEIGHT, BASED ON THE DRY MATERIAL, OF AN INSOLUBILIZED CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE, MELAMINE-FORMALDEHYDE, METHYLATED UREA-FORMALDEHYDE AND METHYLATED MELAMINE-FORMALDEHYDE CONDENSATION PRODUCTS AND MIXTURES THEREOF, SAID FIBERS BEING CHARACTERIZED BY A TENSILE STRENGTH WHICH IS SUBSTANTIALLY THE SAME AS THE UNTREATED NATURAL CELLULOSE TEXTILE FIBERS FROM WHICH THEY WERE PREPARED.
Claim 4
Dependent Claim
112 words
A WRINKLE AND CREASE RESISTANT CELLULOSIC TEXTILE MATERIAL CONSISTING OF PARTIALLY ESTERIFIED NATURAL CELLULOSE TEXTILE FIBERS SELECTED FROM THE GROUP CONSISTING OF PARTIAL FORMYL, PARTIAL ACETYL AND PARTIAL PROPIONYL ESTERS OF NATURAL CELLULOSE, IN WHICH FROM 1 TO 10% OF THE HYDROXYL GROUPS OF THE NATURAL CELLULOSE HAVE BEEN ESTERIFIED, IMPREGNATED WITH FROM ABOUT 6 TO 16% BY WEIGHT, BASED ON THE DRY MATERIAL, OF AN INSOLUBILIZED CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE, MELAMINE-FORMALDEHYDE, METHYLATED UREA-FORMALDEHYDE AND METHYLATED MELAMINE-FORMALDEHYDE CONDENSATION PRODUCTS AND MIXTURES THEREOF, SAID FIBERS BEING CHARACTERIZED BY A TENSILE STRENGTH WHICH IS SUBSTANTIALLY THE SAME AS THE UNTREATED NATURAL CELLULOSE TEXTILE FIBERS FROM WHICH THEY WERE PREPARED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |