Patent US4810251A successfully refreshed from Google Patents.
US4810251A
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US
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Fatliquoring solution dispersion or emulsion and a process for treating leather therewith
Assignee: Bayer AG
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Filing: 1986-05-01
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Granted: 1989-03-07
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Expires: 2006-05-01
Abstract
Abstract Aqueous fatliquoring solutions, dispersions or emulsions are made with (a) polyethers having at least two hydroxyl groups and a molecular weight of from 200 to 20,000 and/or (b) polyester containing at least two hydroxyl groups and a molecular weight of from 200 to 20,000 and/or (c) polycarbonates containing at least two hydroxyl groups and a molecular weight of from 200 to 20,000 and/or mixtures thereof. These fatliquoring agents are used to treat tanned leathers until from 0.1 to 20 wt % has been taken up. The thus-treated leather is particularly useful in the production of leather-polyurethane compositions such as shoes without the use of an adhesive.
Inventors
- 👤 Harro Traubel
- 👤 Helmut Woynar
- 👤 Hans-Werner Muller
- 👤 Hans J. Focks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:57
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C14; C14C; C14C9/00; C14C9/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
158 words
A process for treating tanned leathers in which tanned leather is treated with an aqueous fatiquoring solution, emulsion or dispersion containing (a) 20-100 wt. % of a hydroxypolyether containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (b) 20-100 wt. % of a hydroxypolyester containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (c) 20-100 wt. % of a hydroxypolycarbonate containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (d) 20-100 wt. % of a mixture of (a) and (b), (b) and (c), (a) and (c) or (a), (b) and (c) as fatliquoring agent, (e) the balance being water, until from 0.1 to 20 wt. % (based on the pared weight of the leather) of the fatliquoring solution, emulsion or dispersion has been taken up.
Claim 2
Dependent Claim
158 words
A process for treating tanned leathers in which tanned leather is treated with an aqueous fatiquoring solution, emulsion or dispersion containing (a) 20-100 wt. % of a hydroxypolyether containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (b) 20-100 wt. % of a hydroxypolyester containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (c) 20-100 wt. % of a hydroxypolycarbonate containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (d) 20-100 wt. % of a mixture of (a) and (b), (b) and (c), (a) and (c) or (a), (b) and (c) as fatliquoring agent, (e) the balance being water, until from 0.1 to 20 wt. % (based on the pared weight of the leather) of the fatliquoring solution, emulsion or dispersion has been taken up.
Claim 3
Dependent Claim
19 words
The process of claim 1 in which the aqueous fatliquoring solution, emulsion or dispersion contains a water miscible solvent.
Claim 4
Dependent Claim
23 words
The process of claim 1 in which the aqueous fatliquoring solution, emulsion or dispersion is used in conjunction with another different fatliquoring agent.
Claim 5
Dependent Claim
21 words
The process of claim 1 in which (a) and/or (b) and/or (c) has a molecular weight of from 400 to 10,000.
Claim 6
Dependent Claim
29 words
The process of claim 1 in which the tanned leather is treated until from 0.2 to 10 wt % of the fatliquoring solution, emulsion or dispersion is taken up.
Claim 7
Dependent Claim
21 words
The process of claim 5 in which (a) and/or (b) and/or (c) has a molecular weight of from 800 to 3000.
Claim 8
Dependent Claim
21 words
The process of claim 1 in which (a) and/or (b) and/or (c) has a molecular weight of from 800 to 3000.
Claim 9
Dependent Claim
45 words
The process of claim 1 in which the aqueous fatliquoring solution, emulsion or dispersion contains a hydroxyppolyether formed from a starter component selected from the group consisting of water, diols, polyols and mixtures thereof with an oxirane and/or oxolane and/or oxethane and/or a mixture thereof.
Claim 10
Dependent Claim
27 words
The process of claim 1 in which the aqueous fatliquoring solution, emulsion or dispersion contains a hydrophilic hydroxypolyether in which at least 30% oxyethylene groups are present.
Claim 11
Dependent Claim
26 words
The process of claim 1 in which the aqueous fatliquoring solution, emulsion or dispersion contains a hydrophilic hydroxypolyester and/or hydroxypolycarbonate formed from di- or poly-ethylene glycols.
Claim 12
Dependent Claim
125 words
An aqueous fatliquoring solution, emulsion or dispersion made up of (a) 20-100 wt. % of a hydroxypolyether containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (b) 20-100 wt. % of a hydroxypolyester containing at least two hydroxy groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (c) 20-100 wt. % of a hydroxypolycarbonate containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (d) 20-100 wt. % of a mixture of (a) and (b) or (b) and (c) or (a) and (c) or (a) , (b) and (c) as fatilquoring agent and (e) the balance being water.
Claim 13
Dependent Claim
125 words
An aqueous fatliquoring solution, emulsion or dispersion made up of (a) 20-100 wt. % of a hydroxypolyether containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (b) 20-100 wt. % of a hydroxypolyester containing at least two hydroxy groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (c) 20-100 wt. % of a hydroxypolycarbonate containing at least two hydroxyl groups and having a molecular weight of from 200 to 20,000 as fatliquoring agent or (d) 20-100 wt. % of a mixture of (a) and (b) or (b) and (c) or (a) and (c) or (a) , (b) and (c) as fatilquoring agent and (e) the balance being water.
Claim 14
Dependent Claim
12 words
The composition of claim 11 which further includes a water miscible solvent.
Claim 15
Dependent Claim
21 words
The composition of claim 11 in which (a) and/or (b) and/or (c) has a molecular weight of from 800 to 3000.
Claim 16
Dependent Claim
18 words
The composition of claim 11 in which a hydrophilic hydroxypolyether having at least 30% oxyethylene groups is present.
Claim 17
Dependent Claim
21 words
The composition of claim 11 in which a hydrophilc hydroxypolyester and/or hydrophilic hydroxypolyarbonate formed from di- or poly-ethylene glycols is present.
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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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |