US4879032A
Expired / Lapsed
US
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Fluid separatory devices having improved potting and adhesive compositions
Assignee: Castall Inc
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Filing: 1984-06-04
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Granted: 1989-11-07
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Expires: 2004-06-04
Abstract
Abstract Fluid separatory devices containing novel polyurethane potting and adhesive compositions comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the beta -diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, said catalyst being present in an amount effective to substantially increase the cure rate and prevent bubble formation. Nontoxic metallo-organic catalysts based on zinc, iron, and copper are preferred for use in separatory devices for blood dialysis and water purification.
Inventors
- 👤 John C. Zemlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; B; B01; B01D; B01D63/00; B01D63/02; B01D63/021; B01D63/022; B01D63/023; B01D65/00; B01D65/003; C08G18/08; C08G18/16; C08G18/22; C09; C09J; C09J175/00; C09J175/04; C09J175/12
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
160 words
A hollow-fiber, fluid separatory device comprising a bundle of fine hollow fibers whose end portions are potted in a tube-sheet and whose open fiber ends terminate in a tube-sheet face, the bundle being sealed within a casing to form a separatory cell having one or more fluid ports which allow for the passage of one fluid through the fibers and another around the fibers without mixing of the two fluids, said tube-sheet comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said composition comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 2
Dependent Claim
160 words
A hollow-fiber, fluid separatory device comprising a bundle of fine hollow fibers whose end portions are potted in a tube-sheet and whose open fiber ends terminate in a tube-sheet face, the bundle being sealed within a casing to form a separatory cell having one or more fluid ports which allow for the passage of one fluid through the fibers and another around the fibers without mixing of the two fluids, said tube-sheet comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said composition comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 3
Dependent Claim
37 words
The device of claim 1 wherein said composition has a ratio of NCO/OH of from about 0.5 to about 1.5 and said metallo-organic catalyst comprises of from about 0.001 to about 5.0% by weight of said composition.
Claim 4
Dependent Claim
97 words
The device of claim 2 wherein: said aliphatic polyisocyanate has the formula: R.sub.1 (NCO).sub.X (A) were R 1 has from 2 to 36 C atoms, said --NCO groups are not directly bonded to an aromatic ring, and X is an integer of at least 2; and said propoxylated polyether amine has the formula: ##STR6## where R 2 is a linear or slightly branched predominantly polyisopropoxy chain having a molecular weight of from about to about 8000, R 3 is selected from the group consisting of isoproproxy and diisopropoxy, and Y is an integer of at least 2.
Claim 5
Dependent Claim
26 words
The device of claim 3 wherein said metallo-organic catalyst is selected from the organic acid salts and the β-diketonates of zinc, iron, copper, and mixtures thereof.
Claim 6
Dependent Claim
26 words
The device of claim 4 wherein said metallo-organic catalyst is selected from the group consisting of the acetyl acetonates of zinc, iron, copper, and mixtures thereof.
Claim 7
Dependent Claim
13 words
The device of claim 5 wherein said metallo-organic catalyst is zinc acetyl acetonate.
Claim 8
Dependent Claim
151 words
A scroll-type fluid separatory device comprising a central permeate tube around which is wrapped a mesh spacer and a sandwich bag, said sandwich bag including a plurality of layers joined along their edges by an adhesive composition and said layers including a first semipermeable membrane, a first backing, a permeate carrier, a second backing, and a second semipermeable membrane, said adhesive composition comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said polyurethane composition comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metello-organic catalyst selected from the group consisting f the organic acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 9
Dependent Claim
151 words
A scroll-type fluid separatory device comprising a central permeate tube around which is wrapped a mesh spacer and a sandwich bag, said sandwich bag including a plurality of layers joined along their edges by an adhesive composition and said layers including a first semipermeable membrane, a first backing, a permeate carrier, a second backing, and a second semipermeable membrane, said adhesive composition comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said polyurethane composition comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metello-organic catalyst selected from the group consisting f the organic acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 10
Dependent Claim
37 words
The device of claim 7 wherein said composition has a ratio of NCO/OH of from about 0.5 to about 1.5 and said metallo-organic catalyst comprises of from about 0.001 to about 5.0% by weight of said composition.
Claim 11
Dependent Claim
98 words
The device of claim 8 wherein: said aliphatic polyisocyanate has the formula: R.sub.1 (NCO).sub.X (A) where R 1 has from 2 to 36 C atoms, said --NCO groups are not directly bonded to an aromatic ring, and X is an integer of at least 2; and said propoxylated polyether amine has the formula: ##STR7## where R 2 is a linear or slightly branched predominantly polyisopropoxy chain having a molecular weight of from about 200 to about 8000, R 3 is selected from the group consisting of isoproproxy and diisopropoxy, and Y is an integer of at least 2.
Claim 12
Dependent Claim
30 words
The device of claim 9 wherein said metallo-organic catalyst is selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, and mixtures thereof.
Claim 13
Dependent Claim
26 words
The device of claim 10 wherein said metallo-organic catalyst is selected from the group consisting of the acetyl acetonates of zinc, iron, copper, and mixtures thereof.
Claim 14
Dependent Claim
13 words
The device of claim 11 wherein said metallo-organic catalyst is copper acetyl acetonate.
Claim 15
Dependent Claim
97 words
A polyurethane potting and adhesive composition comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said polyurethane composition consisting essentially of the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, maganese, mercury, lead, and mixture thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 16
Dependent Claim
97 words
A polyurethane potting and adhesive composition comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said polyurethane composition consisting essentially of the reaction product of an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, maganese, mercury, lead, and mixture thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 17
Dependent Claim
46 words
The composition of claim 13 wherein said aliphatic polyisocyanate is from about 10 to about 50% by weight of said composition, said propoxylated polyether amine is from about 20 to about 90% by weight, and said metallo-organic catalyst is from about 0.001 to 5.0% by weight.
Claim 18
Dependent Claim
47 words
The composition of claim 14 wherein said aliphatic polyisocyanate is from about 15 to about 40% by weight of said composition, said propoxylated polyether amine is from about 20 to about 85% by weight, and said metallo-organic catalyst is from about 0.005 to about 3.0% by weight.
Claim 19
Dependent Claim
47 words
The composition of claim 15 wherein said aliphatic polyisocyanate is from about 17 to about 35% by weight of said composition, said propoxylated polyether amine is from about 20 to about 80% by weight, and said metallo-organic catalyst is from about 0.01 to about 0.5% by weight.
Claim 20
Dependent Claim
98 words
The composition of claim 13 wherein: said aliphatic polyisocyanate has the formula: R.sub.1 (NCO).sub.X (A) where R 1 has from 2 to 36 C atoms, said --NCO groups are not directly bonded to an aromatic ring, and X is an integer of at least 2; and said propoxylated polyether amine has the formula ##STR8## where R 2 is a linear or slightly branched predominantly polyisopropoxy chain having a molecular weight of from about 200 to about 8000, R 3 is selected from the group consisting of isoproproxy and diisopropoxy, and Y is an integer of at least 2.
Claim 21
Dependent Claim
18 words
The composition of claim 17 wherein said propoxylated polyether amine is completely isoproxy and predominantly a tertiary amine.
Claim 22
Dependent Claim
48 words
The composition of claim 18 wherein said aliphatic polyisocyanate is selected from the group consisting of isophorone diisocyanate, ethylene diisocyanate, propylene diisocyanate, hexamethylene diisocyanate, decamethylene diisocyanate, cyclohexylene diisocyanate, 2,4'-methylene bis (cyclohexyl isocyanate), 4,4'-methylene bis (cyclohexyl isocyanate), the biuret of hexamethylene diisocyanate, trimethyl hexamethylene diisocyanate, and tetramethyl xylene diisocyanate.
Claim 23
Dependent Claim
12 words
The composition of claim 19 wherein said aliphatic polyisocyanate is isophorone diisocyanate.
Claim 24
Dependent Claim
26 words
The composition of claim 20 wherein said metallo-organic catalyst is selected from the group consisting of the acetyl acetonates of zinc, iron, copper, and mixtures thereof.
Claim 25
Dependent Claim
26 words
The composition of claim 21 further including a low molecular weight chain-extender polyol in an amount effective to substantially increase the hardness of the cured composition.
Claim 26
Dependent Claim
14 words
The composition of claim 22 wherein said low molecular weight chain-extender polyol is tetrahydroxypropylethylenediamine.
Claim 27
Dependent Claim
47 words
The composition of claim 21 further including of from about 5 to about 30% by weight of said composition of an adhesion-improving polyol having a molecular weight of at least about 200 in an amount effective to substantially increase the adhesion of said composition to cellulosic substrates.
Claim 28
Dependent Claim
24 words
The composition of claim 24 wherein the peel strength of said composition bonded to wet cellulose acetate film is greater than about 0.2 lbs/inch.
Claim 29
Dependent Claim
24 words
The composition of claim 25 wherein said adhesion-improving polyol is selected from the group consisting of polycaprolactones, adipic acid derived polyesters, and mixtures thereof.
Claim 30
Dependent Claim
29 words
The composition of claim 26 wherein said adhesion-improving polyol is selected from the group consisting of polycaprolactone diols and triols having a molecular weight of less than about 1000.
Claim 31
Independent Claim
85 words
A method for preparing a polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said method comprising reacting an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 32
Independent Claim
85 words
A method for preparing a polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said method comprising reacting an aliphatic polyisocyanate with a propoxylated polyether amine in the presence of a metallo-organic catalyst selected from the group consisting of the acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 33
Dependent Claim
55 words
The method of claim 28 further including the addition of an adhesion-improving polyol having a molecular weight of at least about 200 in an amount effective to substantially increase the adhesion of said composition to cellulosic substrates, said method including the initial step of preparing a prepolymer of said adhesion-improving polyol and said a polyisocyanate.
Claim 34
Dependent Claim
38 words
The method of claim 29 wherein said adhesion-improving polyol is selected from the group consisting of polycaprolactones, adipic acid derived polyesters, and mixtures thereof, and comprises of from about 5 to about 30% by weight of said composition.
Claim 35
Dependent Claim
100 words
A cellulosic substrate adhered to an adhesive composition, said adhesive composition comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said polyurethane composition comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether arine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 36
Dependent Claim
100 words
A cellulosic substrate adhered to an adhesive composition, said adhesive composition comprising a cured polyurethane composition which is substantially bubble-free although cured in the presence of moisture, said polyurethane composition comprising the reaction product of an aliphatic polyisocyanate with a propoxylated polyether arine in the presence of a metallo-organic catalyst selected from the group consisting of the organic acid salts and the β-diketonates of zinc, iron, copper, manganese, mercury, lead, and mixtures thereof, and said catalyst being present in an amount effective to substantially increase the cure rate and permit curing in the presence of moisture without significant bubble formation.
Claim 37
Dependent Claim
26 words
The cellulosic substrate of claim 31 wherein said substrate is selected from the group consisting of cellulose, regenerated cellulose, cellulose esters, cellulose ethers, and nitrated cellulose.
Claim 38
Dependent Claim
21 words
The cellulosic substrate of claim 32 wherein said substrate is selected from the group consisting of regenerated cellulose and cellulose acetate.
Claim 39
Dependent Claim
47 words
The cellulosic substrate of claim 31 wherein said aliphatic polyisocyanate is from about 10 to about 50% by weight of said composition, said propoxylated polyether amine is from about 20 to about 90% by weight, and said metallo-organic catalyst is from about 0.001 to 5.0% by weight.
Claim 40
Dependent Claim
49 words
The cellulosic substrate of claim 34 wherein said composition further includes of from about 5 to about 30% by weight of said composition of an adhesion-improving polyester polyol having a molecular weight of at least about 200 to substantially increase the adhesion of said composition to said cellulosic substrate.
Claim 41
Dependent Claim
26 words
The cellulosic substrate of claim 35 wherein said adhesion-improving polyester polyol is selected from the group consisting of polycaprolactones, adipic acid derived polyesters, and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |