Patent US3957431A successfully refreshed from Google Patents.
US3957431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for easy-care finishing cellulosics
Assignee: BASF SE
•
Filing: 1975-03-28
•
Granted: 1976-05-18
•
Expires: 1995-03-28
Abstract
Abstract Process for the easy-care finishing of cellulosics involving low formaldehyde release, wherein the cellulosics, after having been impregnated with a solution of aminoplast-forming substances and dried, are sprayed with a solution of urea.
Inventors
- 👤 Panemangalore S. Pai
- 👤 Harro Petersen
- 👤 Friedrich Klippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
In a process for the easy-care finishing of cellulosic textile material by impregnating said material with an aqueous solution of aminoplast-forming substances and drying and fixation, the improvement which comprises diminishing the release of free formaldehyde from the finished material by spraying or slop padding said material, after impregnation and drying, with an effective amount of an essentially aqueous 2 to 60% strength by weight solution of a formaldehyde acceptor in the form of a compound which has a molecular weight of less than 200 and contains the group ##EQU2## wherein X is --0--, --NH-- or --CH 2 -- and Y is 0, NH or S.
Claim 2
Dependent Claim
106 words
In a process for the easy-care finishing of cellulosic textile material by impregnating said material with an aqueous solution of aminoplast-forming substances and drying and fixation, the improvement which comprises diminishing the release of free formaldehyde from the finished material by spraying or slop padding said material, after impregnation and drying, with an effective amount of an essentially aqueous 2 to 60% strength by weight solution of a formaldehyde acceptor in the form of a compound which has a molecular weight of less than 200 and contains the group ##EQU2## wherein X is --0--, --NH-- or --CH 2 -- and Y is 0, NH or S.
Claim 3
Dependent Claim
19 words
The improvement as claimed in claim 1, wherein the formaldehyde acceptor contains the group ##EQU3## in a five-membered ring.
Claim 4
Dependent Claim
32 words
The improvement as claimed in claim 1, wherein the post-cure process is used and the textiles are impregnated, dried, sprayed or slop padded with the formaldehyde acceptor solution and only then fixed.
Claim 5
Dependent Claim
31 words
The improvement as claimed in claim 1, wherein the pre-cure process is used and the textiles are finished and after fixation are sprayed or slop padded with the formaldehyde acceptor solution.
Claim 6
Dependent Claim
37 words
The improvement as claimed in claim 1, wherein the formaldehyde acceptor employed is one of the following: urea, ethyleneurea, 4-methylethyleneurea, 4,5-dimethylethyleneurea, 4,5-dihydroxyethyleneurea, 1,3-oxazolidin-2-one, pyrrolidone-2, propyleneurea, monomethylurea, dimethylurea, thiourea, a guanidine salt of a mineral acid and dicyandiamide.
Claim 7
Dependent Claim
14 words
The improvement as claimed in claim, wherein urea is employed as the formaldehyde acceptor.
Claim 8
Dependent Claim
25 words
The improvement as claimed in claim 1, wherein from 2.0 to 4 per cent by weight of formaldehyde acceptor is applied to the fibrous material.
Claim 9
Dependent Claim
24 words
The improvement as claimed in claim 6, wherein from 0.2 to 4 per cent by weight of urea are applied to the fibrous material.
References Cited (Backward Citations)
US3617198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |