US3944690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nonwoven fabrics
Assignee: BASF SE
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Filing: 1975-01-30
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Granted: 1976-03-16
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Expires: 1995-01-30
Abstract
Abstract Nonwovens of natural and synthetic fibers which are bonded uniformly over the whole cross-section are obtained by using as binders aqueous polymer dispersions containing as heat-sensitizing agents alkoxylated amines having inverse solubility and a pH of less than 6.
Inventors
- 👤 Dieter Distler
- 👤 Kurt Wendel
- 👤 Andreas Einwiller
- 👤 Knut Oppenlaender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:43
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/372; B; B01; B01D; B01D39/00; B01D39/14; C; C08; C08C; C08C1/00; C08C1/14; C08C1/145; C08F; C08F6/00; C08F6/14; C08F6/22; C08J; C08J3/00; C08J3/12; C08J3/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
In a process for binding nonwoven fabrics by impregnating the fabrics with anionic or non-ionic aqueous heat-sensitized polymer dispersions and drying the impregnated fabrics at elevated temperature in the usual manner, the improvement of using a polymer dispersion containing 2 to 10 percent by weight, based on the polymer, of a polyalkoxylated aliphatic amine containing from 1 to 10 amino groups and being alkoxylated with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, and both ethylene and propylene oxides, said polyalkoxylated amine having inverse solubility and a mean molecular weight of from 200 to 15,000, as measured by the hydroxyl number determined by the acetic anhydride method, and said polymer dispersion containing said polyalkoxylated amine having a pH below 6.
Claim 2
Dependent Claim
125 words
In a process for binding nonwoven fabrics by impregnating the fabrics with anionic or non-ionic aqueous heat-sensitized polymer dispersions and drying the impregnated fabrics at elevated temperature in the usual manner, the improvement of using a polymer dispersion containing 2 to 10 percent by weight, based on the polymer, of a polyalkoxylated aliphatic amine containing from 1 to 10 amino groups and being alkoxylated with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, and both ethylene and propylene oxides, said polyalkoxylated amine having inverse solubility and a mean molecular weight of from 200 to 15,000, as measured by the hydroxyl number determined by the acetic anhydride method, and said polymer dispersion containing said polyalkoxylated amine having a pH below 6.
Claim 3
Dependent Claim
44 words
Aa processs as claimed in claim 1, wherein said alkoxylated amine is a polyoxypropylated aliphatic amine having 1 to 4 carbon atoms and 1 to 3 amino groups, said polyoxypropylated amine having a mean molecular weight of from 800 to 6000, as measured aforesaid.
Claim 4
Dependent Claim
66 words
A process as claimed in claim 1, wherein said alkoxylated amine is an aliphatic amine with 1 to 4 carbon atoms and 1 to 3 amino groups and the oxyalkylene groups thereof are those of both ethylene oxide and propylene oxide in a molar ration between 1:10 and 1:1, respectively, said polyalkoxylated amine having a mean molecular weight of from 800 to 6,000 as measured aforesaid.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1, wherein said aliphatic amine has more than 4 carbon atoms and 1 to 3 amino groups.
Claim 6
Dependent Claim
45 words
A process as claimed in claim 1, wherein said alkoxylated amine is ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine or dipropylene triamine which is oxyalkylated with both ethylene oxide and propylene oxide in a mole ratio of said oxides of 1:10 to 1:1, respectively.
Claim 7
Dependent Claim
17 words
A process as claimed in claim 1, wherein said alkoxylated amine is polyoxypropylated triethanolamine, diethanolamine, or ethanolamine.
Claim 8
Dependent Claim
15 words
A process as claimed in claim 1, wherein said alkoxylated amine is polyoxypropylated ethylene diamine.
Claim 9
Dependent Claim
36 words
A process as claimed in claim 1, wherein said oxyalkylated amine is ethylene diamine which is oxyalkylated with both ehtylene oxide and propylene oxide in a mole ratio of said oxides of 1:10 to 1:1, respectively.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |