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US4301053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resin coating composition
Assignee: Von Roll Isola USA Inc
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Filing: 1980-01-29
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Granted: 1981-11-17
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Expires: 2000-01-29
Abstract
Abstract Two-package waterborne polyurethane resin coating compositions which, when applied to a solid substrate produce an adherent, abrasion resistant coating thereon, are disclosed herein. The coating compositions essentially include a small amount of N-methylpyrrolidone to improve adhesion to non-polar thermoplastic substances and are prepared by providing a carboxyl group-containing polyurethane in aqueous dispersion and, optionally, a water dispersible acrylic, as a first part; and using a trifunctional aziridine compound to make the second part of the two package system.
Inventors
- 👤 Austin A. Wolfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/833; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/16; C08K5/34; C08L; C08L33/00; C08L33/04; C08L33/06; C08L75/00; C08L75/04; C09; C09D; C09D175/00; C09D175/04; Y; Y10; Y10S; Y10S524/00; Y10S524/906; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31565; Y10T428/31573; Y10T428/31576; Y10T428/31605
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A two-package aqueous coating composition comprising as Part A (i) a carboxyl group-containing urethane prepolymer, said prepolymer being dispersed in (ii) a polar liquid medium comprising predominantly water; and as Part B a trifunctional aziridine compound, said compound being adapted to react with said urethane prepolymer to cross-link the same; and a minor, effective amount of N-methylpyrrolidone, sufficient to enhance the adhesion of a coating prepared from such composition to a non-polar thermoplastic substrate.
Claim 2
Dependent Claim
74 words
A two-package aqueous coating composition comprising as Part A (i) a carboxyl group-containing urethane prepolymer, said prepolymer being dispersed in (ii) a polar liquid medium comprising predominantly water; and as Part B a trifunctional aziridine compound, said compound being adapted to react with said urethane prepolymer to cross-link the same; and a minor, effective amount of N-methylpyrrolidone, sufficient to enhance the adhesion of a coating prepared from such composition to a non-polar thermoplastic substrate.
Claim 3
Dependent Claim
32 words
A coating composition as defined in claim 1 wherein the amount of N-methylpyrrolidone comprises from about 1 to about 7 parts by weight per 100 parts by weight of the total composition.
Claim 4
Dependent Claim
29 words
A coating composition as defined in claim 1 wherein Part A also includes up to 74.0% by weight, solids basis, of (iii) a water dispersible thermoplastic carboxylated acrylic polymer.
Claim 5
Dependent Claim
19 words
An article comprising solid substrate having at least one surface coated with the aqueous coating composition of claim 1.
Claim 6
Dependent Claim
18 words
An article as defined in claim 4 wherein the solid substrate is comprised of a synthetic organic polymer.
Claim 7
Dependent Claim
18 words
An article as defined in claim 5 wherein said polymer is an aromatic polycarbonate or a polyphenylene ether.
Claim 8
Dependent Claim
14 words
An article as defined in claim 4 wherein said solid substrate is a metal.
Claim 9
Dependent Claim
14 words
An article as defined in claim 5 wherein said polymer is a foamed polymer.
Claim 10
Dependent Claim
15 words
An article as defined in claim 6 wherein said aromatic polycarbonate is a poly(bisphenol-A carbonate).
Claim 11
Dependent Claim
13 words
An article as defined in claim 6 wherein said polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene)ether.
Claim 12
Dependent Claim
22 words
An article as defined in claim 6 wherein the aqueous coating composition has been cured on said surface of said solid substrate.
References Cited (Backward Citations)
US3632556A
Cited
US4183836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |