US3861937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing suede-like synthetic leathers
Assignee: Occidental Chemical Corp
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Filing: 1972-07-03
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Granted: 1975-01-21
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Expires: 1992-07-03
Abstract
Abstract An artificial suede-like leather is produced by (1) coating an elastomeric polymer composition onto a temporary carrier member, (2) laminating a napped fabric or other suitable material onto the polymer coating, (3) drying and partially curing the polymer coating, (4) peeling the temporary carrier member from the coating, leaving a layer of the polymer coating on the surface of the carrier member and (5) subsequently curing the polymer layer remaining on the fabric to form an unitary article comprised of the fabric and the polymer layer. The elastomeric polymer can be a curable polyurethane elastomer or a mixture of other polymers with a curable elastomer. Alternately, a napped fabric can be coated in step (1) and a temporary carrier can be laminated onto the polymer coating in step (2) followed by steps (3-5) to produce an artifical suede leather.
Inventors
- 👤 George Hanneken
- 👤 Christian Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:24
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29C59/025; B44; B44F; B44F9/00; B44F9/12; D; D06; D06N; D06N3/00; D06N3/0086; D06N3/0095; D06N3/12; D06N3/14; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/26
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
58 words
APPLYING A CURABLE ELASTOMERIC COATING COMPOSITION CONSISTING OF (A) A CURABLE ELASTOMERIC COMPOSITION CONCROSS-LINKING AGENT DISSOLVED IN SOLVENT OR (B) A LIQUID CURABLE MIXTURE COMPRISING A POLYURETHANE PREPOLYMER, A POLYESTER POLYOL AND A HYDROXY REACTIVE COMPOUND ONTO A TEMPORARY PAPER OR METAL WEB CARRIER WHICH IS WET BY THE ELASTOMER TO FORM A COATING LAYER OF SAID COMPOSITION;
Claim 2
Dependent Claim
58 words
APPLYING A CURABLE ELASTOMERIC COATING COMPOSITION CONSISTING OF (A) A CURABLE ELASTOMERIC COMPOSITION CONCROSS-LINKING AGENT DISSOLVED IN SOLVENT OR (B) A LIQUID CURABLE MIXTURE COMPRISING A POLYURETHANE PREPOLYMER, A POLYESTER POLYOL AND A HYDROXY REACTIVE COMPOUND ONTO A TEMPORARY PAPER OR METAL WEB CARRIER WHICH IS WET BY THE ELASTOMER TO FORM A COATING LAYER OF SAID COMPOSITION;
Claim 3
Dependent Claim
15 words
LAMINATING A NAPPED FABRIC SUBSTRATE TO THE RESULTING COATED LAYER TO FORM A COMPOSITE ARTICLE;
Claim 4
Dependent Claim
15 words
LAMINATING A NAPPED FABRIC SUBSTRATE TO THE RESULTING COATED LAYER TO FORM A COMPOSITE ARTICLE;
Claim 5
Dependent Claim
15 words
laminating a napped fabric substrate to the resulting coated layer to form a composite article;
Claim 6
Dependent Claim
15 words
laminating a napped fabric substrate to the resulting coated layer to form a composite article;
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said curable elastomeric coating composition has a thickness of from about 5 to about 25 mils.
Claim 8
Dependent Claim
38 words
The method of claim 2 wherein said curable elastomeric composition (a) comprises a curable elastomeric polyurethane polymer of from about 10 to about 60 percent solids by weight and has a viscosity of between 1,000 and 12,000 centipoises.
Claim 9
Dependent Claim
14 words
heating said composite article in an oven to dry and partially cure said coating;
Claim 10
Dependent Claim
14 words
heating said composite article in an oven to dry and partially cure said coating;
Claim 11
Dependent Claim
14 words
HEATING SAID COMPOSITE ARTICLE IN AN OVEN TO DRY AND PARTIALLY CURE SAID COATING:
Claim 12
Dependent Claim
14 words
HEATING SAID COMPOSITE ARTICLE IN AN OVEN TO DRY AND PARTIALLY CURE SAID COATING:
Claim 13
Dependent Claim
36 words
PEELING SAID SUBSTRATE FROM SAID TEMPORARY CARRIER WHEREBY A LAYER OF SAID COATING COMPOSITION REMAINS ON SAID CARRIER AND WHEREBY A LAYER OF SAID COATING COMPOSITION HAVING A SUEDE-LIKE LEATHER APPEARANCE REMAINS ON SAID SUBSTRATE, AND
Claim 14
Dependent Claim
36 words
PEELING SAID SUBSTRATE FROM SAID TEMPORARY CARRIER WHEREBY A LAYER OF SAID COATING COMPOSITION REMAINS ON SAID CARRIER AND WHEREBY A LAYER OF SAID COATING COMPOSITION HAVING A SUEDE-LIKE LEATHER APPEARANCE REMAINS ON SAID SUBSTRATE, AND
Claim 15
Dependent Claim
36 words
peeling said substrate from said temporary carrier whereby a layer of said coating composition remains on said carrier and whereby a layer of said coating composition having a suede-like leather appearance remains on said substrate, and
Claim 16
Dependent Claim
36 words
peeling said substrate from said temporary carrier whereby a layer of said coating composition remains on said carrier and whereby a layer of said coating composition having a suede-like leather appearance remains on said substrate, and
Claim 17
Dependent Claim
17 words
The method of claim 1 wherein said suede-like-leather obtained in step (4) is embossed prior to curing.
Claim 18
Dependent Claim
31 words
The method of claim 1 wherein said polyester polyol is present in the amount by weight based upon the weight of said polyurethane prepolymer of from about 20 to 70 percent.
Claim 19
Dependent Claim
11 words
completing the cure of said coating composition remaining on said substrate.
Claim 20
Dependent Claim
11 words
completing the cure of said coating composition remaining on said substrate.
Claim 21
Dependent Claim
11 words
COMPLETING THE CURE OF SAID COATING COMPOSITION REMAINING ON SAID SUBSTRATE.
Claim 22
Dependent Claim
11 words
COMPLETING THE CURE OF SAID COATING COMPOSITION REMAINING ON SAID SUBSTRATE.
Claim 23
Dependent Claim
25 words
The method of claim 2 wherein said curable elastomeric composition (a) comprises a mixturE of a solid curable elastomeric polyurethane polymer and a curable rubber.
Claim 24
Dependent Claim
45 words
The method of claim 2 wherein said curable elastomeric composition (a) comprises a mixture of a solid curable elastomeric polyurethane, a curable rubber, and a polymer of suitable pliability selected from the group consisting of vinyl polymers and copolymers, poly-alpha-methyl styrene, polyamides, polyester-amides and polyesters.
Claim 25
Dependent Claim
42 words
The method of claim 2 wherein said curable elastomeric composition (a) comprises a mixture of a solid curable elastomeric polyurethane and a polymer of suitable pliability selected from the group consisting of vinyl polymers and copolymers, poly-alpha-methyl styrene, polyamides, polyester-amides and polyesters.
Claim 26
Dependent Claim
19 words
The method of claim 1 wherein said solvent comprises a combination of an aromatic hydrocarbon and an aliphatic ketone.
Claim 27
Dependent Claim
11 words
A synthetic suede-like leather produced by the method of claim 1.
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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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |