Patent US4789720A successfully refreshed from Google Patents.
US4789720A
Expired / Lapsed
US
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Hydrophilic polyurethanes prepared from mixed oxyalkylene glycols
Assignee: Tyndale Plains Hunter Ltd
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Filing: 1988-03-09
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Granted: 1988-12-06
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Expires: 2008-03-09
Abstract
Abstract A hydrophilic, thermoplastic polyurethane polymer of improved dimensional stability and mechanical strength having an average molecular weight of from about 10,000 to about 200,000 produced by reacting (A) an organic diisocyanate with (B) a blend of glycol components comprising (i) ethylene glycol and/or diethylene glycol, (ii) a polyoxyethylene glycol having an average molecular weight of from about 400 to about 20,000 and (iii) a polyoxypropylene glycol having an average molecular weight of from about 200 to about 2500, and (C) water in an amount up to about 0.5% by weight of the reaction mixture. The polymers are particularly useful in the form of a film product such as gloves and condoms. Other uses are as low friction coatings, body implants and active agent release media.
Inventors
- 👤 John M. Teffenhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:04
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/08; A61K; A61K8/00; A61K8/02; A61K8/0208; A61K8/18; A61K8/72; A61K8/84; A61K8/87; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/2853; A61K9/48; A61K9/4891; A61K9/70; A61K9/7015; A61L; A61L27/00; A61L27/28; A61L27/34; A61L29/00; A61L29/08; A61L29/085; A61L31/00; A61L31/08; A61L31/10; A61Q15/00; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/302; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; Y; Y10; Y10S; Y10S528/00; Y10S528/904
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
158 words
A hydrophilic, thermoplastic polyurethane polymer, of improved dimensional stability and mechanical strength, said polymer having an average molecular weight of from about 10,000 to about 200,000 and comprising the reaction product of: A. a diol blend comprising (i) from about 2 to about 15 parts by weight of an alkylene glycol selected from ethylene glycol and diethylene glycol, (ii) from about 10 to about 80 parts by weight of a polyoxyethylene glycol having an average molecular weight of from about 400 to about 20,000, and (iii) from about 10 to about 60 parts by weight of a polyoxypropylene glycol having an average molecular weight of from about 200 to about 2500; B. an organic diisocyanate, the ratio of NCO to OH being from about 0.95:1 to about 0.98:1; and C. water in an amount of no more than about 0.5 parts by weight, the sum of A, B and C being on a 100 parts by weight basis.
Claim 2
Dependent Claim
158 words
A hydrophilic, thermoplastic polyurethane polymer, of improved dimensional stability and mechanical strength, said polymer having an average molecular weight of from about 10,000 to about 200,000 and comprising the reaction product of: A. a diol blend comprising (i) from about 2 to about 15 parts by weight of an alkylene glycol selected from ethylene glycol and diethylene glycol, (ii) from about 10 to about 80 parts by weight of a polyoxyethylene glycol having an average molecular weight of from about 400 to about 20,000, and (iii) from about 10 to about 60 parts by weight of a polyoxypropylene glycol having an average molecular weight of from about 200 to about 2500; B. an organic diisocyanate, the ratio of NCO to OH being from about 0.95:1 to about 0.98:1; and C. water in an amount of no more than about 0.5 parts by weight, the sum of A, B and C being on a 100 parts by weight basis.
Claim 3
Dependent Claim
17 words
The polymer of claim 1 wherein the polyoxypropylene glycol has an average molecular weight of about 1025.
Claim 4
Dependent Claim
26 words
The polyurethane polymer of claim 1 wherein the diisocyanate is an aliphatic diisocyanate selected from methylene bis(cyclohexyl-4 isocyanate), trimethyl hexamethylene diisocyanate, isophorone diisocyanate and cyclohexyl diisocyanate.
Claim 5
Dependent Claim
13 words
The polyurethane polymer of claim 1 wherein the diisocyanate is methylene bis(cyclohexyl-4 -isocyanate).
Claim 6
Dependent Claim
20 words
A carrier system comprising an active agent and as a carrier vehicle therefor, the hydrophilic polyurethane polymer of claim 1.
Claim 7
Dependent Claim
14 words
The carrier system of claim 5 wherein the same is a nonleachable carrier system.
Claim 8
Dependent Claim
14 words
The carrier system of claim 5 wherein the same is a leachable medium system.
Claim 9
Dependent Claim
18 words
The carrier system of claim 7 wherein the leachable carrier system is an aqueous medium, leachable carrier system.
Claim 10
Dependent Claim
16 words
The carrier system of claim 8 wherein the carrier system is disposed in a liquid medium.
Claim 11
Dependent Claim
14 words
The carrier system of claim 9 wherein the liquid medium is a body fluid.
Claim 12
Dependent Claim
16 words
The carrier system of claim 5 wherein the carrier system is disposed in a gaseous medium.
Claim 13
Dependent Claim
12 words
The carrier system of claim 11 wherein the gaseous medium is air.
Claim 14
Dependent Claim
20 words
The carrier system of claim 5 wherein the polymer carrying the active agent is in the shape of a film.
Claim 15
Dependent Claim
20 words
The carrier system of claim 5 wherein the polymer carrying the active agent is in the shape of a rod.
Claim 16
Dependent Claim
22 words
A bodily implant comprising the rod-shaped polymer of claim 14 and wherein the active agent is leachable in contact with bodily fluids.
Claim 17
Dependent Claim
18 words
The carrier system of claim 5 wherein the active agent is a drug for human or veterinary use.
Claim 18
Dependent Claim
15 words
The carrier system of claim 13 wherein the film is a wound or burn dressing.
Claim 19
Dependent Claim
13 words
The carrier system of claim 13 wherein the active agent is a fragrance.
Claim 20
Dependent Claim
15 words
The carrier system of claim 13 wherein the active agent is a deodorant or antiperspirant.
Claim 21
Dependent Claim
12 words
A water absorbent coating comprising the hydrophilic polyurethane polymer of claim 1.
Claim 22
Dependent Claim
14 words
A low friction, water absorbent coating comprising the hydrophilic polyurethane polymer of claim 1.
Claim 23
Dependent Claim
12 words
The coating of claim 20 wherein the same is an antifogging coating.
Claim 24
Dependent Claim
20 words
The coating of claim 20 wherein the same is adapted for application to a boat hull for reduced friction flow.
Claim 25
Dependent Claim
22 words
The coating of claim 20 wherein the same is adapted for application to the inside of a duct for reduced friction flow.
Claim 26
Dependent Claim
16 words
The coating of claim 20 wherein the same is adapted for application to a medical device.
Claim 27
Dependent Claim
13 words
The coating of claim 25 wherein the medical device is a body implant.
Claim 28
Dependent Claim
12 words
The coating of claim 25 wherein the medical device is a cannula.
Claim 29
Dependent Claim
12 words
The coating of claim 25 wherein the medical device is a catheter.
Claim 30
Dependent Claim
18 words
As an article of manufacture, a shaped, three-dimensional structure formed of the hydrophilic, polyurethane polymer of claim 1.
Claim 31
Dependent Claim
15 words
The article of manufacture as defined in claim 29 wherein the structure is a film.
Claim 32
Dependent Claim
19 words
The article of manufacture as defined in claim 30 wherein the film is in the form of a glove.
Claim 33
Dependent Claim
20 words
The article of manufacture as defined in claim 30 wherein the film is in the form of a denture liner.
Claim 34
Dependent Claim
19 words
The article of manufacture as defined in claim 30 wherein the film is in the form of a condom.
Claim 35
Dependent Claim
24 words
A film forming cosmetic composition for application as a wrinkle patch comprising a solution of the polymer of claim 1 in an evaporable solvent.
Claim 36
Dependent Claim
44 words
A deodorant delivery system for applying an odor-controlling, moisture vapor permeable, but water impermeable, film to the skin, comprising a film-forming solution of the polymer of claim 1 in an evaporative solvent, and means for delivering the film-forming solution to the desired skin area.
Claim 37
Dependent Claim
17 words
The deodorant delivery system as defined in claim 35 wherein the delivery means is an aerosol vessel.
Claim 38
Dependent Claim
16 words
The article of manufacture as defined in claim 29 wherein the structure is a contact lens.
Claim 39
Dependent Claim
16 words
The article of manufacture as defined in claim 29 wherein the structure is an extruded shape.
Claim 40
Dependent Claim
15 words
The article of manufacture as defined in claim 29 wherein the structure is a tube.
Claim 41
Dependent Claim
19 words
The article of manufacture as defined in claim 29 wherein the structure is in the form of a bead.
Claim 42
Dependent Claim
16 words
The article of manufacture as defined in claim 39 wherein the structure is an intravenous catheter.
Claim 43
Dependent Claim
15 words
The article of manufacture as defined in claim 39 wherein the structure is a cannula.
Claim 44
Dependent Claim
16 words
The article of manufacture as defined in claim 39 wherein the cannula is a feeding tube.
Claim 45
Dependent Claim
16 words
The article of manufacture as defined in claim 29 wherein the structure is an intrauterine device.
Claim 46
Dependent Claim
16 words
The article of manufacture as defined in claim 29 wherein the structure is a body implant.
References Cited (Backward Citations)
US3822238A
Cited
US3975350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |