US3900688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile substrate having coatings of polycarbonate-polyurea elastomer
Assignee: Bayer AG
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Filing: 1973-10-23
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Granted: 1975-08-19
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Expires: 1993-10-23
Abstract
Abstract This invention relates to bonding coats and top coats made of aliphatic, segmented polycarbonate-polyurea elastomers for coating textile substrates. The coats are applied to the substrates from their solutions by the reverse roll coating process. The coating used has the advantage of providing resistance to hydrolysis, light fastness, unlimited pot life and can be prepared with inexpensive and physiologically harmless solvents. The synthetic leather has a high abrasion resistance, high folding strength, high flexibility in the cold and resistance to alcohol.
Inventors
- 👤 Wilhelm Thoma
- 👤 Klaus Noll
- 👤 Josef Pedain
- 👤 Hans Joachim Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08G18/70; C08G18/72; C08G18/74; C08G18/75; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/507; D06M15/513; D06M15/564; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2549; Y10T442/259; Y10T442/273
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
35 words
LAMINATES COMPRISING A TEXTILE SUBSTRATE WHICH IS A WOVEN OR KNITTED FABRIC OR FLEECE AND HAVING BONDED THERETO A BONDING COAT AND A TOP COAT OF AN ALIPHATIC, SEGMENTED POLYCARBONATE-POLYREA ELASTOMER OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
35 words
LAMINATES COMPRISING A TEXTILE SUBSTRATE WHICH IS A WOVEN OR KNITTED FABRIC OR FLEECE AND HAVING BONDED THERETO A BONDING COAT AND A TOP COAT OF AN ALIPHATIC, SEGMENTED POLYCARBONATE-POLYREA ELASTOMER OF THE GENERAL FORMULA:
Claim 3
Dependent Claim
38 words
The laminate of claim 1 wherein in the general formula the group A is derived from diols selected from the group consisting of hexane-1,6-diol, heptane-1,7-diol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, hexaethylene glycol, heptaethylene glycol and octaethylene glycol.
Claim 4
Dependent Claim
22 words
The laminate of claim 1 wherein the radicals R'', R'''', R'''''' and RIV are derived from hexanediisocyanate, 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethylcyclohexane, 4,4''-diaminodicyclohexylmethane and hydrazine hydrate.
Claim 5
Dependent Claim
31 words
The laminate of claim 1 wherein in the bonding coat A is from about 40 to 100 wt. % of -CH2-CH2-O)p CH2-CH2- and about 60 to 0 wt. % of -CH2)q.
Claim 6
Dependent Claim
32 words
The laminate of claim 4 wherein in the top coat A is from about 90 to 100 wt. % of -CH2)q and from about 10 to 0 wt. % of -CH2-CH2-O)p CH2-CH2-.
Claim 7
Dependent Claim
31 words
The laminate of claim 5 wherein in the bonding coat A is from about 60 to 100 wt. % of -CH2-CH2-O)p CH2-CH2- and about 40 to 0 wt. % of -CH2)q.
References Cited (Backward Citations)
US3586525A
Cited
US3622526A
Cited
US3715326A
Cited
US3678011A
Cited
US3751290A
Cited
US3734894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |