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CA1175596A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Hydrophilic polyurethane diacrylate composition
Assignee: Tyndale Plains Hunter Ltd
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Filing: 1981-10-07
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Granted: 1984-10-02
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Expires: 2001-10-07
Abstract
Abstract Abstract of the Invention: Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 30 to about 95 weight percent of a hydrophilic polyurethane resin. The resulting products will form a hydrogel upon immersion in water and are permeable to gases, ions and other low molecular weight species. The hydrophilic polyurethane diacrylate com-positions may be molded to form shaped products that are dimensionally stable after repeated exposure to boiling water and exhibit memory.
Inventors
- 👤 Christian W. Johnston
- 👤 Francis E. Gould
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 13:05
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2031; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61L15/42; A61L15/60; A61L17/00; A61L17/04; A61L27/00; A61L27/14; A61L27/16; B; B01; B01D; B01D71/00; B01D71/06; B01D71/54; B01D71/76; B01D71/78; C; C08; C08F; C08F283/00; C08F283/006; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; A61F; A61F2/00; A61F2/0004; C08G2210/00; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S521/00; Y10S521/905; Y10S528/00; Y10S528/904
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
101 words
A hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water; is permeable to gases, ions and other low molecular weight species; is dimensionally stable and exhibits memory; obtained by the reaction of from about 5 to about 70 weight percent of a diacrylate having the formula: wherein R is selected from the group consisting of hydrogen and the methyl radical and n is a whole number, such that the average molecular weight of said diacrylate is no greater than 1588; in the presence of from about 95 to about 30 weight percent of a hydrophilic polyurethane resin.
Claim 2
Dependent Claim
101 words
A hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water; is permeable to gases, ions and other low molecular weight species; is dimensionally stable and exhibits memory; obtained by the reaction of from about 5 to about 70 weight percent of a diacrylate having the formula: wherein R is selected from the group consisting of hydrogen and the methyl radical and n is a whole number, such that the average molecular weight of said diacrylate is no greater than 1588; in the presence of from about 95 to about 30 weight percent of a hydrophilic polyurethane resin.
Claim 3
Dependent Claim
13 words
The polyurethane diacrylate composition of claim 1 wherein said diacrylate is a dimethacrylate.
Claim 4
Dependent Claim
22 words
The polyurethane diacrylate composition of claim 1 wherein said diacrylate is from about 10 to about 45 weight percent of said composition.
Claim 5
Dependent Claim
14 words
The polyurethane diacrylate composition of claim 1 wherein said diacrylate is diethylene glycol diacrylate.
Claim 6
Dependent Claim
23 words
The polyurethane diacrylate composition of claim 2 wherein said diacrylate is a polyethylene glycol dimethacrylate having an average molecular weight of about 1586.
Claim 7
Dependent Claim
23 words
The polyurethane diacrylate composition of claim 1 wherein said diacrylate is a polyethylene glycol diacrylate having an average molecular weight of about 508.
Claim 8
Dependent Claim
18 words
The polyurethane diacrylate composition of claim 1 wherein said diacrylate is about 20 weight percent of said composition.
Claim 9
Dependent Claim
14 words
The polyurethane diacrylate composition of claim 7 wherein said diacrylate is diethylene glycol di-acrylate.
Claim 10
Dependent Claim
20 words
The polyurethane diacrylate composition of claim 1 wherein said polyurethane is derived from a mixture of polyols and a diisocyanate.
Claim 11
Dependent Claim
15 words
The polyurethane diacrylate composition of claim 9 wherein one of said polyols is diethylene glycol.
Claim 12
Dependent Claim
28 words
The polyurethane diacrylate composition of claim 9 wherein one of said polyols is a polyethylene glycol characterized by an average molecular weight between about 1450 and about 7500.
Claim 13
Dependent Claim
29 words
The polyurethane diacrylate composition of claim 9 wherein said mixture of polyols is a mixture of di-ethylene glycol and polyethylene glycol having an average molecular weight of about 7500.
Claim 14
Dependent Claim
12 words
A surgical suture extruded from the polyurethane diacrylate composition of claim 1.
Claim 15
Dependent Claim
18 words
The suture of claim 13 wherein said hydrophilic polyurethane diacrylate composition is in the form of a mono-filament.
Claim 16
Dependent Claim
19 words
The suture of claim 13 wherein said hydrophilic polyurethane diacrylate composition is in the form of a braided multifilament.
Claim 17
Dependent Claim
15 words
The suture of claim 13 having present in said hydrophilic polyurethane diacrylate composition a medicament.
Claim 18
Dependent Claim
10 words
The suture of claim 16 wherein said medicament is iodine.
Claim 19
Dependent Claim
18 words
A burn dressing comprising the hydrophilic polyurethane diacrylate composition of claim 1 in the form of a film.
Claim 20
Dependent Claim
16 words
The burn dressing of claim 18 having present in said hydrophilic polyurethane diacrylate composition a medicament.
Claim 21
Dependent Claim
11 words
The burn dressing of claim 19 wherein said medicament is sulfadiazine.
Claim 22
Dependent Claim
15 words
An implant comprising the hydrophilic poly-urethane diacrylate composition of claim 1 and containing a medicament.
Claim 23
Dependent Claim
12 words
The implant of claim 21 wherein said medicament is an anti-tubercular drug.
Claim 24
Dependent Claim
12 words
The implant of claim 21 wherein said medicament is a drug protagonist.
Claim 25
Dependent Claim
11 words
The implant of claim 21 wherein said medicament is a hormone.
Claim 26
Dependent Claim
11 words
The implant of claim 21 wherein said medicament is a steroid.
Claim 27
Dependent Claim
12 words
The implant of claim 21 wherein said medicament is a vitamin. kh/mg
Claim 28
Dependent Claim
12 words
An intrauterine device comprising a hydro-philic polyurethane diacrylate composition of claim 1.
Claim 29
Dependent Claim
12 words
The intrauterine device of claim 27 in the shape of a diaphragm.
Claim 30
Dependent Claim
14 words
The intrauterine device of claim 27 having distributed throughout said polyurethane polymer a contra-ceptive.
Claim 31
Dependent Claim
12 words
The intrauterine device of claim 29 wherein the contraceptive is lactic acid.
Claim 32
Dependent Claim
17 words
A canula, the walls of which are formed of the hydrophilic polyurethane diacrylate composition of claim 1.
Claim 33
Dependent Claim
17 words
The canula of claim 31 wherein said hydrophilic polyurethane diacrylate has distributed throughout its mass a medicament.
Claim 34
Dependent Claim
10 words
The canula of claim 31 wherein said medicament is iodine.
Claim 35
Dependent Claim
19 words
A vascular prosthesis comprising the hydrophilic polyurethane diacrylate composition of claim 1 extruded in the form of a tube.
Claim 36
Dependent Claim
18 words
The vascular prosthesis of claim 34 wherein said polyurethane diacrylate composition has distributed throughout its mass a medicament.
Claim 37
Dependent Claim
23 words
An oral delivery system comprising a pharma-cologically active agent and the hydrophilic polyurethane diacrylate composition of claim 1 as a carrier vehicle there-for.
Claim 38
Dependent Claim
15 words
A battery separator plate formed of the hydro-philic polyurethane diacrylate composition of claim 1. kh/mg
Claim 39
Dependent Claim
14 words
A gas permeable membrane formed of the hydro-philic polyurethane diacrylate composition of claim 1.
Claim 40
Dependent Claim
12 words
A corneal prosthesis comprising the hydrophilic polyurethane diacrylate composition of claim 1.
Claim 41
Dependent Claim
27 words
A method of imparting moisture to a dry gas which comprises passing the gas through a tube formed of the hydrophilic polyurethane diacrylate composition of claim 1.
Claim 42
Dependent Claim
15 words
A surgical drape comprising a film of the hydro-philic polyurethane diacrylate composition of claim 1.
Claim 43
Dependent Claim
13 words
A dialysis membrane formed of the hydrophilic polyurethane diacrylate composition of claim 1.
Claim 44
Dependent Claim
17 words
A carbon dioxide - oxygen exchange membrane formed of the hydrophilic polyurethane diacrylate composition of claim 1.
Claim 45
Dependent Claim
13 words
A contact lens comprising the molded hydrophilic polyurethane diacrylate composition of claim 1.
Claim 46
Dependent Claim
17 words
The polyurethane diacrylate composition of claim 1 which has been molded to form a desired shape. kh/mg
Claim 47
Dependent Claim
104 words
A process for preparing a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon im-mersion in water; is permeable to gases, ions and other low molecular weight species; is dimensionally stable and exhi-bits memory; said process comprising: reacting from about 5 to about 70 weight percent of a diacrylate having the formula: wherein R is selected from the group consisting of hydrogen and the methyl radical and n is a whole number, such that the average molecular weight of said diacrylate is no greater than 1588; in the presence of from about 95 to about 30 weight percent of a hydrophilic polyurethane resin.
Claim 48
Dependent Claim
104 words
A process for preparing a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon im-mersion in water; is permeable to gases, ions and other low molecular weight species; is dimensionally stable and exhi-bits memory; said process comprising: reacting from about 5 to about 70 weight percent of a diacrylate having the formula: wherein R is selected from the group consisting of hydrogen and the methyl radical and n is a whole number, such that the average molecular weight of said diacrylate is no greater than 1588; in the presence of from about 95 to about 30 weight percent of a hydrophilic polyurethane resin.
Claim 49
Dependent Claim
19 words
The method of claim 46 wherein the reaction of said diacrylate is initiated by an isopropyl percarbonate catalyst. mab/??
References Cited (Backward Citations)
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