Patent US3903050A successfully refreshed from Google Patents.
US3903050A
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US
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Permanent press fabric resin from crotonylidenediurea-glyoxal-formaldehyde aminoplast material
Assignee: Celanese Corp
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Filing: 1973-07-20
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Granted: 1975-09-02
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Expires: 1993-07-20
Abstract
Abstract Crotonylidenediurea is reacted with glyoxal and the resulting adduct methylolated with formaldehyde to produce the corresponding trimethylolated derivative which exhibits very desirable properties as a permanent press resin for fabrics.
Inventors
- 👤 Thomas M Powanda
- 👤 Lawrence B Holzman
- 👤 James E Tracy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:22
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C08G12/26; C08G12/28; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR THE PREPARATION OF AN AMINOPLAST MATERIAL COMPRISING REACTING CROTONYLIDENEDIUREA WITH AN ABOUT EQUIMOLAR PROPORTION OF GLYOXAL IN A HYDROXYLIC MEDIUM AT AN ELEVATED TEMPERATURE OF FROM ABOUT 40*C TO ABOUT ATMOSPHERIC REFLUX TO FORM A 1, 2-HYDROXYETHYL-SUBSTITUTED CROTONYLIDENEDIUREA ADDUCT, AND REACTING SAID ADDUCT WITH BETWEEN ABOUT 2.80 AND ABOUT 5.0 MOLAR PROPORTIONS OF FORMALDEHYDE IN A HYDROXYLIC MEDIUM AT AN ELEVATED TEMPERATURE OF FROM ABOUT 40*C TO ABOUT ATMOSPHERIC REFLUX, AND RECOVERING AN AMINOPLAST MATERIAL.
Claim 2
Independent Claim
79 words
A method for the preparation of an aminoplast material comprising reacting crotonylidenediurea with an about equimolar proportion of glyoxal in a hydroxylic medium at an elevated temperature of from about about 40*C to about atmospheric reflux to form a 1, 2-hydroxyethyl-substituted crotonylidenediurea adduct; and reacting said adduct with between about 2.80 and about 5.0 molar proportions of formaldehyde in a hydroxylic medium at an elevated temperature of from about 40*C to about atmospheric reflux; and recovering an aminoplast material.
References 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) | 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 |