US3941733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silanol-containing urethane dispersions
Assignee: 3M Co
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Filing: 1975-01-02
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Granted: 1976-03-02
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Expires: 1995-01-02
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
2026-10-23 20:13
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; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; 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; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
An aqueous dispersion of poly(urethane-urea) characterized in having a poly(urethane-urea) backbone containing interspersed bound water-solubilizing ionic groups pendant from said backbone and terminal mutually interractive silyl groups.
Claim 2
Dependent Claim
27 words
An aqueous dispersion of poly(urethane-urea) characterized in having a poly(urethane-urea) backbone containing interspersed bound water-solubilizing ionic groups pendant from said backbone and terminal mutually interractive silyl groups.
Claim 3
Dependent Claim
100 words
An aqueous dispersion of curable poly(urethane-urea) characterized in having a poly(urethane-urea) backbone containing interspersed bound solubilizing ionic moieties pendant from said backbone and terminal mutually interreactive silyl moieties, said solubilizing moieties being present to an extent of about one per 800 to 20,000 daltons and the silyl group of said silyl moieties being of the general form Y 3 Si- where Y is a labile group and said silyl moieties further being present to an extent of about two per 1000 to 125,000 daltons and there being no more than one prepolymer-derived cross-link per 3000 daltons in said curable poly(urethane-urea).
Claim 4
Dependent Claim
100 words
An aqueous dispersion of curable poly(urethane-urea) characterized in having a poly(urethane-urea) backbone containing interspersed bound solubilizing ionic moieties pendant from said backbone and terminal mutually interreactive silyl moieties, said solubilizing moieties being present to an extent of about one per 800 to 20,000 daltons and the silyl group of said silyl moieties being of the general form Y 3 Si- where Y is a labile group and said silyl moieties further being present to an extent of about two per 1000 to 125,000 daltons and there being no more than one prepolymer-derived cross-link per 3000 daltons in said curable poly(urethane-urea).
Claim 5
Dependent Claim
29 words
An aqueous dispersion of curable poly(urethane-urea) according to claim 2 wherein the silyl group is (QO) 3 Si-wherein Q is H or alkyl of 1 to 4 carbon atoms.
Claim 6
Dependent Claim
80 words
Process for production of an aqueous dispersion of poly(urethane-urea) comprising the steps of 1. reacting polymeric polyol with a stoichiometric excess of polyisocyanate to produce isocyanate-terminated prepolymer, 2. reacting said prepolymer with less than stoichiometric amounts of isocyanate-reactive X 3 Si- compound and water solubilizing ionic compound, X being H, alkoxy, acyloxy, halogen or amino, to obtain an isocyanate containing prepolymer and thereafter, 3. mixing said isocyanate-containing prepolymer with water under agitation thereby obtaining a stable dispersion of silyl-terminated poly(urethane-urea).
Claim 7
Dependent Claim
80 words
Process for production of an aqueous dispersion of poly(urethane-urea) comprising the steps of 1. reacting polymeric polyol with a stoichiometric excess of polyisocyanate to produce isocyanate-terminated prepolymer, 2. reacting said prepolymer with less than stoichiometric amounts of isocyanate-reactive X 3 Si- compound and water solubilizing ionic compound, X being H, alkoxy, acyloxy, halogen or amino, to obtain an isocyanate containing prepolymer and thereafter, 3. mixing said isocyanate-containing prepolymer with water under agitation thereby obtaining a stable dispersion of silyl-terminated poly(urethane-urea).
Claim 8
Dependent Claim
24 words
An at least partially siloxane cross-linked self-supporting film of poly(urethane-urea) comprising interspersed bound water solubilizing ionic groups pendent from the backbone of said poly(urethane-urea).
Claim 9
Dependent Claim
24 words
An at least partially siloxane cross-linked self-supporting film of poly(urethane-urea) comprising interspersed bound water solubilizing ionic groups pendent from the backbone of said poly(urethane-urea).
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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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |