US3983291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silanol-containing urethane dispersions
Assignee: 3M Co
•
Filing: 1975-12-04
•
Granted: 1976-09-28
•
Expires: 1995-12-04
Abstract
Abstract Dispersions of poly(urethane-urea) terminated by hydrolyzable or hydrolyzed silyl groups form self-supporting films and coatings on webs. Leather coated with one of these compositions has excellent wear-resistance.
Inventors
- 👤 Joe H-S Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:16
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; C14C11/006; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/10; C08G18/83; C08G18/831; C08G18/832; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/643; D06M15/653; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31558; Y10T428/31591; Y10T428/31598; Y10T428/31601; Y10T428/31605; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T442/00; Y10T442/20; Y10T442/2369; Y10T442/273
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
In combination, a substrate and a coating thereon of poly(urethane-urea) said poly(urethane-urea) being characterized in having a poly(urethane-urea) backbone containing interspersed bound water-solubilizing ionic groups pendent from said backbone and in being at least partially siloxane cross-linked by mutually interreacted silyl groups.
Claim 2
Dependent Claim
42 words
In combination, a substrate and a coating thereon of poly(urethane-urea) said poly(urethane-urea) being characterized in having a poly(urethane-urea) backbone containing interspersed bound water-solubilizing ionic groups pendent from said backbone and in being at least partially siloxane cross-linked by mutually interreacted silyl groups.
Claim 3
Dependent Claim
11 words
The combination according to claim 1 wherein the substrate is porous.
Claim 4
Dependent Claim
54 words
The combination according to claim 1 wherein water-solubilizing groups are present in moieties to an extent of about one said moiety per 800 to 20,000 daltons and silicon atoms are present to an extent of about two per 1000 to 125,000 daltons and there is no more than one prepolymer-derived cross-links per 3,000 daltons.
Claim 5
Dependent Claim
11 words
The combination of claim 2 wherein the porous substrate is leather.
Claim 6
Dependent Claim
11 words
The combination of claim 2 wherein the porous substrate is fabric.
Claim 7
Dependent Claim
11 words
The combination of claim 2 wherein the porous substrate is paper.
Claim 8
Dependent Claim
10 words
The combination of claim 1 wherein the substrate is non-porous.
Claim 9
Dependent Claim
10 words
The combination of claim 7 wherein the substrate is glass.
Claim 10
Dependent Claim
10 words
The combination of claim 7 wherein the substrate is metal.
Claim 11
Dependent Claim
52 words
A process for enhancing the oil and water repellency of a porous substrate comprising applying to said substrate a composition comprising an aqueous dispersion of poly(urethane-urea), said poly(urethane-urea) being characterized in having a poly(urethane-urea) backbone containing interspersed bound water solubilizing ionic groups pendent from said backbone and terminal mutually interreactive silyl groups.
Claim 12
Dependent Claim
52 words
A process for enhancing the oil and water repellency of a porous substrate comprising applying to said substrate a composition comprising an aqueous dispersion of poly(urethane-urea), said poly(urethane-urea) being characterized in having a poly(urethane-urea) backbone containing interspersed bound water solubilizing ionic groups pendent from said backbone and terminal mutually interreactive silyl groups.
References Cited (Backward Citations)
US3179713A
Cited
US3632557A
Cited
US3622527A
Cited
US3640924A
Cited
US3814716A
Cited
US3627722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |