Patent US3903033A successfully refreshed from Google Patents.
US3903033A
Expired / Lapsed
US
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Urea-glyoxal-formaldehyde cellulose reactant
Assignee: FREEDOM TEXTILE CHEMICALS Co
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Filing: 1973-05-02
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Granted: 1975-09-02
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Expires: 1993-05-02
Abstract
Abstract A process for preparing stable aqueous solutions of a watersoluble urea-formaldehyde-glyoxal condensation product in which urea, glyoxal and formaldehyde are reacted under very slightly acidic conditions of pH and at a temperature of from 40* to 90*C., further reacted under more acidic conditions of pH and at a temperature of from 40* to 90*C., and then adjusted to very slightly acidic conditions of pH.
Inventors
- 👤 Tsai Hsiang Chao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:57
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/40; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A PROCESS FOR PREPARING AN AQUEOUS SOLUTION OF A WATERSOLUBLE UREA-FORMALDEHYDE-GLYOXAL CONDENSATION PRODUCT COMPRISING REACTING IN AN AQUEOUS MEDIUM ABOUT 1.0 MOLE OF UREA, ABOUT 1.0 MOL OF GLYCOXAL AND LESS THAN 2.0 MOLES OF FORMALDEHYDE AT A PH MAINTAINED BETWEEN 6.2 AND 6.7 AND AT A TEMPERATURE OF 40* TO 90*C UNTIL THE FORMATION OF 1,3-DIMETHYLOL-4,5 DIHYDROXY 2-IMIDAZOLIDINONE IS ESSENTIALLY COMPLETED, ADDING AN ACIDIC MATERIAL TO THE REACTION SOLUTION TO ADJUST THE PH BETWEEN 2.0 AND 3.0, MAINTAINING THE PH BETWEEN 2.0 AND 3.0 AND AT A TEMPERATURE BETWEEN 40*C AND 90*C FOR A PERIOD OF AT LEAST 0.5 TO 3.0 HOURS AND ADDING A BASE TO THE SOLUTION TO ADJUST THE FINAL PH OF THE SOLUTION BETWEEN 5.0 AND 7.0.
Claim 2
Dependent Claim
122 words
A PROCESS FOR PREPARING AN AQUEOUS SOLUTION OF A WATERSOLUBLE UREA-FORMALDEHYDE-GLYOXAL CONDENSATION PRODUCT COMPRISING REACTING IN AN AQUEOUS MEDIUM ABOUT 1.0 MOLE OF UREA, ABOUT 1.0 MOL OF GLYCOXAL AND LESS THAN 2.0 MOLES OF FORMALDEHYDE AT A PH MAINTAINED BETWEEN 6.2 AND 6.7 AND AT A TEMPERATURE OF 40* TO 90*C UNTIL THE FORMATION OF 1,3-DIMETHYLOL-4,5 DIHYDROXY 2-IMIDAZOLIDINONE IS ESSENTIALLY COMPLETED, ADDING AN ACIDIC MATERIAL TO THE REACTION SOLUTION TO ADJUST THE PH BETWEEN 2.0 AND 3.0, MAINTAINING THE PH BETWEEN 2.0 AND 3.0 AND AT A TEMPERATURE BETWEEN 40*C AND 90*C FOR A PERIOD OF AT LEAST 0.5 TO 3.0 HOURS AND ADDING A BASE TO THE SOLUTION TO ADJUST THE FINAL PH OF THE SOLUTION BETWEEN 5.0 AND 7.0.
Claim 3
Dependent Claim
78 words
A process according to claim 1 wherein the mole ratios of formaldehyde employed relative to one mole of urea and one mole of glyoxal are between 1.7 and 1.9, the acidic material is an organic carboxylic acid, the pH of the reaction solution is adjusted with the acid to a pH between 2.4 and 3.0 and maintained at that pH range at a temperature between 55*C. and 65*C. for a period of at least 1.5 to 3 hours.
Claim 4
Dependent Claim
14 words
A process according to claim 2 wherein the carboxylic acid is a citric acid.
Claim 5
Dependent Claim
105 words
A process according to claim 3 wherein the mole ratios of formaldehyde employed relative to one mole of urea and one mole of glyoxal is about 1.8, the pH is adjusted to between 6.2 and 6.6 at a temperature maintained between 50*C. and 60*C. for a period of 3 3/4 hours, citric acid is added to the reaction solution to lower the pH to between 2.2 and 2.8, the pH is maintained between 2.2 and 2.8 and the temperature between 55*C. and 65*C. for a period of 3 hours, and sodium hydroxide is added to the solution to adjust the pH between 6.2 and 6.6.
Claim 6
Dependent Claim
18 words
Compositions useful for finishing cellulosic textile materials comprising aqueous solutions prepared according to the process of claim 1.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |