US5151329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of patent leather and patent leather prepared therefrom
Assignee: Bayer AG
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Filing: 1989-06-26
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Granted: 1992-09-29
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Expires: 2009-06-26
Abstract
Abstract The present invention is directed to a process for the production of high-gloss patent leather from two-component polyurethane compositions by reacting hydroxyl group-containing oligourethanes with polyisocyanates, characterized in that the oligourethanes have been synthesized from A) at least 2 macrodiols in a molar ratio of about 1:6 to 6:1 wherein 1) the first macrodiol has an average molecular weight of 254 to about 650 and contains an aromatic ring or a saturated or unsaturated cycloaliphatic ring and 2) the second macrodiol has an average molecular weight of about 1,200 to 3,000, provided that the molecular weight of macrodiol A/2 is at least 3 times the molecular weight of macrodiol A/1, and B) at least one diisocyanate, wherein the macrodiol:diisocyanate molar ratio is about 1.0:0.9 to 1.0:0.3. The present invention is also directed to the high-gloss patent leather prepared in accordance with the above process.
Inventors
- 👤 Klaus Noll
- 👤 Josef Pedain
- 👤 Bruno Zorn
- 👤 Rosemarie Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:52
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; C14C11/006; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/28; C08G18/40; C08G18/42; C08G18/4202; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31558
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
141 words
A process for the production of a high-gloss patent leather which comprises applying to a leather substrate a reactive mixture of a polyisocyanate with a hydroxyl group-containing oligourethane which comprises the reaction product of A) 1) at least one macrodiol having an average molecular weight of 254 to about 650 and comprising a member selected from the group consisting of an aromatic ring, a saturated cycloaliphatic ring and an unsaturated cycloaliphatic ring and 2) at least one macrodiol having an average molecular weight of about 1,200 to 3,000, provided that the molecular weight of macrodiol A/2 is at least 3 times the molecular weight of macrodiol A/1, wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:6 to 6:1 with B) at least one diisocyanate, wherein the macrodiol A:diisocyanate B molar ratio is about 1.0:0.9 to 1.0:0.3.
Claim 2
Dependent Claim
141 words
A process for the production of a high-gloss patent leather which comprises applying to a leather substrate a reactive mixture of a polyisocyanate with a hydroxyl group-containing oligourethane which comprises the reaction product of A) 1) at least one macrodiol having an average molecular weight of 254 to about 650 and comprising a member selected from the group consisting of an aromatic ring, a saturated cycloaliphatic ring and an unsaturated cycloaliphatic ring and 2) at least one macrodiol having an average molecular weight of about 1,200 to 3,000, provided that the molecular weight of macrodiol A/2 is at least 3 times the molecular weight of macrodiol A/1, wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:6 to 6:1 with B) at least one diisocyanate, wherein the macrodiol A:diisocyanate B molar ratio is about 1.0:0.9 to 1.0:0.3.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the macrodiol A:diisocyanate B molar ratio is about 1.0:0.7 to 1.0:0.4.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:3 to 3:1.
Claim 5
Dependent Claim
21 words
The process of claim 2 wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:3 to 3:1.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 7
Dependent Claim
18 words
The process of claim 2 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 8
Dependent Claim
18 words
The process of claim 3 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 9
Dependent Claim
18 words
The process of claim 4 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 10
Dependent Claim
141 words
A high gloss patent leather which is prepared by a process which comprises applying to a leather substrate a reactive mixture of a polyisocyanate with a hydroxyl group-containing oligourethane which comprises the reaction product of A) 1) at least one macrodiol having an average molecular weight of 254 to 650 and comprising a member selected from the group consisting of an aromatic ring, a saturated cycloaliphatic ring and an unsaturated cycloaliphatic ring and 2) at least one macrodiol having an average molecular weight of about 1,200 to 3,000, provided that the molecular weight of macrodiol A/2 is at least 3 times the molecular weight of macrodiol A/1, wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:6 to 6:1 with B) at least one diisocyanate, wherein the macrodiol A:diisocyanate B molar ratio is about 1.0:0.9 to 1.0:0.3.
Claim 11
Dependent Claim
141 words
A high gloss patent leather which is prepared by a process which comprises applying to a leather substrate a reactive mixture of a polyisocyanate with a hydroxyl group-containing oligourethane which comprises the reaction product of A) 1) at least one macrodiol having an average molecular weight of 254 to 650 and comprising a member selected from the group consisting of an aromatic ring, a saturated cycloaliphatic ring and an unsaturated cycloaliphatic ring and 2) at least one macrodiol having an average molecular weight of about 1,200 to 3,000, provided that the molecular weight of macrodiol A/2 is at least 3 times the molecular weight of macrodiol A/1, wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:6 to 6:1 with B) at least one diisocyanate, wherein the macrodiol A:diisocyanate B molar ratio is about 1.0:0.9 to 1.0:0.3.
Claim 12
Dependent Claim
18 words
The patent leather of claim 9 wherein the macrodiol A:diisocyanate B molar ratio is about 1.0:0.7 to 1.0:0.4.
Claim 13
Dependent Claim
22 words
The patent leather of claim 9 wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:3 to 3:1.
Claim 14
Dependent Claim
22 words
The patent leather of claim 10 wherein macrodiols A/1 and A/2 are present in a molar ratio of about 1:3 to 3:1.
Claim 15
Dependent Claim
19 words
The patent leather of claim 9 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 16
Dependent Claim
19 words
The patent leather of claim 10 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 17
Dependent Claim
19 words
The patent leather of claim 11 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
Claim 18
Dependent Claim
19 words
The patent leather of claim 12 wherein macrodiol A/1 has an average molecular weight of about 350 to 600.
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) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |