Patent US4847324A successfully refreshed from Google Patents.
US4847324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic polyvinylbutyral alloys
Assignee: Hydromer Inc
•
Filing: 1988-04-25
•
Granted: 1989-07-11
•
Expires: 2008-04-25
Abstract
Abstract A hydrophilic polymer blend is disclosed which comprises a first polymer component which is an organic solvent-soluble, thermoplastic polyvinylbutyral (PVB) and a second polymer component which is a hydrophilic poly (N-vinyl lactam), e.g., a water soluble polyvinylpyrrolidone. The blend demonstrates slipperiness in aqueous environments and, among other applications, is useful in low-friction coatings for a wide variety of substrates. A method for providing the coating is also described.
Inventors
- 👤 Walter S. Creasy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08L; C08L29/00; C08L29/14; C08L39/00; C08L39/04; C08J2329/00; C08J2329/14; C08J2339/00; C08J2339/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A stable hydrophilic polymer blend which comprises a first polymer component which is an organic solvent soluble performed thermoplastic, polyvinylbutyral (PvB) resin and a second polymer component which is a hydrophilic poly (N-vinyl lactam), said blend having been prepared in a solvent selected from the group consisting of isopropanol, methyl ethyl ketone, diacetone alcohol, ethyl lactate, methylene chloride, trichloroethylene, N-methyl pyrrolidone, mono and di-ethylene glycol ethers, and blends thereof, and said hydrophilic polymer blend being capable of withstanding exposure to water without significant loss of said hydrophilic poly (N-vinyl lactam).
Claim 2
Dependent Claim
90 words
A stable hydrophilic polymer blend which comprises a first polymer component which is an organic solvent soluble performed thermoplastic, polyvinylbutyral (PvB) resin and a second polymer component which is a hydrophilic poly (N-vinyl lactam), said blend having been prepared in a solvent selected from the group consisting of isopropanol, methyl ethyl ketone, diacetone alcohol, ethyl lactate, methylene chloride, trichloroethylene, N-methyl pyrrolidone, mono and di-ethylene glycol ethers, and blends thereof, and said hydrophilic polymer blend being capable of withstanding exposure to water without significant loss of said hydrophilic poly (N-vinyl lactam).
Claim 3
Dependent Claim
16 words
The polymer blend of claim 1 wherein the poly(N-vinyl lactam) is a water soluble polyvinylpyrrolidone homopolymer.
Claim 4
Dependent Claim
17 words
The polymer blend of claim 1 wherein the poly (N-vinyl lactam) is a poly (N-vinyl caprolactam) homopolymer.
Claim 5
Dependent Claim
28 words
The polymer blend of claim 1 wherein the poly(N-vinyl lactam) is selected from the group consisting of homopolymer of N-vinyl lactam, copolymer of N-vinyl lactam or blends thereof.
Claim 6
Dependent Claim
11 words
The polymer blend of claim in the form of a solid.
Claim 7
Dependent Claim
12 words
The polymer blend of claim 1 in the form of a foam.
Claim 8
Dependent Claim
10 words
A solvent solution of the polymer blend of claim 1.
Claim 9
Dependent Claim
12 words
A film or sheet prepared from the polymer blend of claim 1.
References Cited (Backward Citations)
US4100309A
Cited
US4119094A
Cited
US4481326A
Cited
US4373009A
Cited
US4478927A
Cited
US4472467A
Cited
US4642267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |