US4987182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic polyvinybutyral alloys
Assignee: Hydromer Inc
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Filing: 1989-02-23
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Granted: 1991-01-22
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Expires: 2009-02-23
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 coatings is also described.
Inventors
- 👤 Walter S. Creasy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:07
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: 15
Claim 1
Independent Claim
60 words
A stable hydrophilic coating to be applied to a substrate, said coating made with a 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 coating capable of withstanding exposure to water without loss of said hydrophilic poly(N-vinyl lactam).
Claim 2
Dependent Claim
60 words
A stable hydrophilic coating to be applied to a substrate, said coating made with a 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 coating capable of withstanding exposure to water without loss of said hydrophilic poly(N-vinyl lactam).
Claim 3
Dependent Claim
15 words
The coating of claim 1 wherein the poly(N-vinyl lactam) is a water soluble polyvinylpyrrolidone homopolymer.
Claim 4
Dependent Claim
15 words
The coating of claim 1 wherein the poly(N-vinyl lactam) is a poly (N-vinyl caprolactam) homopolymer.
Claim 5
Dependent Claim
20 words
The coating of claim 1 wherein the polymer blend contains at least one additional polymer component which is compatible therewith.
Claim 6
Dependent Claim
27 words
The coating 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 7
Dependent Claim
11 words
The coating of claim 1 in the form of a solid.
Claim 8
Dependent Claim
11 words
The coating of claim 1 in the form of a foam.
Claim 9
Dependent Claim
14 words
The coating of claim 1 wherein the polymer blend is in a solvent solution.
Claim 10
Dependent Claim
21 words
A coating obtained from application of the solvent solution of claim 8 to a substrate followed by evaporation of the solvent.
Claim 11
Dependent Claim
11 words
A film or sheet prepared from the coating of claim 1.
Claim 12
Dependent Claim
20 words
The coating of claim 1 in which the polyvinylbutyral component is crosslinked during or subsequent to fabrication of the blend.
Claim 13
Dependent Claim
23 words
The coating of claim 1 further comprising up to about 20 weight percent of one or a mixture of compatible or compatibilized polymers.
Claim 14
Dependent Claim
43 words
The coating of claim 1 containing one or more additional ingredients selected from the group consisting of organic and inorganic salts, alcohols, amines, acids, polymer latices, resin dispersions, wax dispersions, fillers, fibers, cellulosics, surfactants, pigments, dyes, bio-effecting or body treating materials and fragrances.
Claim 15
Dependent Claim
18 words
The coating of claim 13 in which the additional ingredient is one which is releasable from the coating.
References Cited (Backward Citations)
US4642267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |