US3785848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plasticized topcoat for leather and method
Assignee: Rohm and Haas Co
•
Filing: 1969-09-04
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Granted: 1974-01-15
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Expires: 1989-09-04
Abstract
Abstract The present invention is concerned with improved coating compositions based on hard polymers, specifically, cellulose acetate butyrate plasticized with diisocyanate-extended polyesters. The diisocyanate-extended polyesters are formed in situ in the coating of the invention, which is a final top coating for the products of the invention. The invention also includes flexible products, such as full grain leather and substitute leather having topcoatings thereon of outstanding flexibility made from these compositions, and methods for their preparation.
Inventors
- 👤 V Mattei
- 👤 C Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:13
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/12; C; C09; C09D; C09D101/00; C09D101/08; C09D101/10; C09D101/14; C09D175/00; C09D175/04; C09D175/06; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/31504; Y10T428/31551; Y10T428/31558; Y10T428/31786; Y10T428/31971
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
The method of claim 1 in which the cellulose ester has 24 to 28 percent butyryl and 19 to 22 percent acetyl.
Claim 2
Dependent Claim
26 words
The method of claim 1 in which the polyol of said polyester is one which has a secondary hydroxyl group or a stearically hindered hydroxyl group.
Claim 3
Dependent Claim
26 words
The method of claim 2 in which the polyol of said polyester is one which has a secondary hydroxyl group or a stearically hindered hydroxyl group.
Claim 4
Dependent Claim
14 words
Leather or porous artificial leather prepared in accordance with the method of claim 1.
Claim 5
Dependent Claim
14 words
Leather or porous artificial leather prepared in accordance with the method of claim 2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |