US4642267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic polymer blend
Assignee: Hydromer Inc
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Filing: 1985-05-06
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Granted: 1987-02-10
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Expires: 2005-05-06
Abstract
Abstract A hydrophilic polymer blend is disclosed which comprises a first polymer component which is an organic solvent-soluble, thermoplastic polyurethane and a second polymer component which is a hydrophilic poly(N-vinyl lactam), e.g., a water soluble polyvinylpyrrolidone. The blend demonstrates slipperiness is aqueous environments and, among other applications, is useful in low-friction coatings for a wide variety of substrates.
Inventors
- 👤 Walter S. Creasy
- 👤 Donald H. Lorenz
- 👤 Robert G. LaCasse
- 👤 Salvatore A. Malagreca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:35
CPC Classifications
C; C08; C08L; C08L39/00; C08L39/04; C08L39/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31551; Y10T428/31554; Y10T428/31573; Y10T428/31605
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
55 words
A stable hydrophilic polymer blend which consists essentially of a first polymer component which is an organic solvent-soluble, preformed, thermoplastic polyurethane having no reactive isocynate groups and a second polymer component which is a hydrophilic poly (N-vinyl lactam), said blend capable of withstanding exposure to water without significant loss of said hydrophilic poly (N-vinyl lactam).
Claim 2
Dependent Claim
55 words
A stable hydrophilic polymer blend which consists essentially of a first polymer component which is an organic solvent-soluble, preformed, thermoplastic polyurethane having no reactive isocynate groups and a second polymer component which is a hydrophilic poly (N-vinyl lactam), said blend capable of withstanding exposure to water without significant loss of said hydrophilic poly (N-vinyl lactam).
Claim 3
Dependent Claim
19 words
The polymer blend of claim 1 wherein the polyurethane is derived from an aromatic polyisocyanate and a polyether polyol.
Claim 4
Dependent Claim
19 words
The polymer blend of claim 1 wherein the polyurethane is derived from an aliphatic polyisocyanate and a polyether polyol.
Claim 5
Dependent Claim
19 words
The polymer blend of claim 1 wherein the polyurethane is derived from an aromatic polyisocyanate and a polyester polyol.
Claim 6
Dependent Claim
19 words
The polymer blend of claim 1 wherein the polyurethane is derived from an aliphatic polyisocyanate and a polyester polyol.
Claim 7
Dependent Claim
16 words
The polymer blend of claim 1 wherein the poly(N-vinyl lactam) is a water soluble polyvinylpyrrolidone homopolymer.
Claim 8
Dependent Claim
15 words
The polymer blend of claim 1 wherein the poly(N-vinyl lactam) is a poly(N-vinyl caprolactam) homopolymer.
Claim 9
Dependent Claim
17 words
The polymer blend of claim 1 containing at least one additional polymer component which is compatible therewith.
Claim 10
Dependent Claim
44 words
The polymer blend of claim 6 wherein the additional polymer component is a homopolymer or copolymer of at least one monomer selected from the group consisting of alpha-olefin, vinyl chloride, vinylidene chloride, hydroxyethylmethacrylate, acrylic acid, methacrylic acid, vinyl acetate, vinyl alcohol and vinyl ether.
Claim 11
Dependent Claim
12 words
The polymer blend of claim 1 in the form of a solid.
Claim 12
Dependent Claim
12 words
The polymer blend of claim 1 in the form of a foam.
Claim 13
Dependent Claim
10 words
A solvent solution of the polymer blend of claim 1.
Claim 14
Dependent Claim
21 words
A coating obtained from application of the solvent solution of claim 12 to a substrate followed by evaporation of the solvent.
Claim 15
Dependent Claim
12 words
A film or sheet prepared from the polymer blend of claim 1.
Claim 16
Dependent Claim
21 words
The polymer blend of claim 1 in which the polyurethane component is crosslinked during or subsequent to fabrication of the blend.
Claim 17
Dependent Claim
32 words
The polymer blend of claim 1 in which the poly(N-vinyl lactam) component is combined with a substance which forms a complex therewith prior to, during, or subsequent to fabrication of the blend.
Claim 18
Dependent Claim
22 words
The polymer blend of claim 1 containing up to 20 weight percent of one or a mixture of compatible or compatibilized polymers.
Claim 19
Dependent Claim
12 words
The polymer blend of claim 1 containing one or more additional ingredients.
Claim 20
Dependent Claim
20 words
The polymer blend of claim 18 in which the additional ingredient is one which is releasable from the polymer blend.
Claim 21
Dependent Claim
18 words
The polymer blend of claim 19 in which the releasable material is a bio-effecting or body treating material.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |