US4532316A
Expired / Lapsed
US
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Phase separating polyurethane prepolymers and elastomers prepared by reacting a polyol having a molecular weight of 600-3500 and isocyanate and a low molecular weight chain extender in which the ratios of reactants have a limited range
Assignee: W.L. Gore and Associates Inc
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Filing: 1984-05-29
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Granted: 1985-07-30
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Expires: 2004-05-29
Abstract
Abstract Reactive, 100 percent solids, segmented, phase-separating polyurethane prepolymers are provided, being the reaction products of: (i) a polyol (A) having a number average molecular weight of from about 600 to about 3500 and having a functionality of at least 2; (ii) an isocyanate (B) having a functionality of at least 2; and (iii) a low molecular weight chain extender (C) having a molecular weight in a range lower than about 500 and having a functionality of at least 2, characterized in that the above reactants are employed in such proportions as to satisfy the following equations: <IMAGE> (a) EqOH>/=EqCE (b) EqCE>O, (c) wherein EqNCO is the equivalents of the isocyanate species employed, and EqOH and EqCE denote the equivalents, respectively, of the polyol and chain extender. This invention provides the aforesaid novel prepolymers, the processing made possible by the prepolymers, the polyurethane elastomers resulting from the prepolymers and the products made from those elastomers.
Inventors
- 👤 Robert L. Henn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/65; C08G2270/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/3158
Claims Analysis
Total Claims: 60
Claim 1
Independent Claim
195 words
A reactive, 100 percent solids, storage stable segmented, phase-separating polyurethane prepolymer having soft segments and suitable hard segments comprising the reaction product of: (i) a polyol (A) having a number average molecular weight of from about 600 to about 3500 and having a functionality of at least 2; (ii) an isocyanate (B) having a functionality of at least 2; and (iii) a low molecular weight chain extender (C) having a molecular weight in a range lower than about 500 and having a functionality of at least 2, wherein the reactants are employed in such proportions so as to satisfy the following equations: ##EQU5## Eq.sub.OH ≧Eq.sub.CE (b) Eq.sub.CE >O, (c) wherein Eq NCO denotes the equivalents of the isocyanate species employed, and Eq OH and Eq CE denote the respective molar equivalents of the polyol and chain extender employed, said soft segments provided by the polyol and said suitable hard segments provided by the reaction product of the isocyanate and chain extender and which induce phase-separation of said hard and soft segments in said prepolymer as a result of thermodynamic incompatibility between said hard and soft segments, said prepolymer being an opaque solid at room temperature.
Claim 2
Dependent Claim
195 words
A reactive, 100 percent solids, storage stable segmented, phase-separating polyurethane prepolymer having soft segments and suitable hard segments comprising the reaction product of: (i) a polyol (A) having a number average molecular weight of from about 600 to about 3500 and having a functionality of at least 2; (ii) an isocyanate (B) having a functionality of at least 2; and (iii) a low molecular weight chain extender (C) having a molecular weight in a range lower than about 500 and having a functionality of at least 2, wherein the reactants are employed in such proportions so as to satisfy the following equations: ##EQU5## Eq.sub.OH ≧Eq.sub.CE (b) Eq.sub.CE >O, (c) wherein Eq NCO denotes the equivalents of the isocyanate species employed, and Eq OH and Eq CE denote the respective molar equivalents of the polyol and chain extender employed, said soft segments provided by the polyol and said suitable hard segments provided by the reaction product of the isocyanate and chain extender and which induce phase-separation of said hard and soft segments in said prepolymer as a result of thermodynamic incompatibility between said hard and soft segments, said prepolymer being an opaque solid at room temperature.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein said polyol is selected from the group consisting of poly(alkylene ethers), polyesters, polycaprolactones, hydroxyl terminated polyester-amides, polycarbonates, polybutadienes or copolymers thereof.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein said polyol is a poly(alkylene ether).
Claim 5
Dependent Claim
8 words
An adhesive of the composition of claim 1.
Claim 6
Dependent Claim
8 words
A sealant of the composition of claim 1.
Claim 7
Dependent Claim
11 words
A coating on a substrate of the composition of claim 1.
Claim 8
Dependent Claim
9 words
The coating of claim 6 on a fabric substrate.
Claim 9
Dependent Claim
9 words
A shaped article of the composition of claim 1.
Claim 10
Dependent Claim
13 words
The shaped article of claim 8 having green strength exceeding about 0.5 pli.
Claim 11
Dependent Claim
9 words
The shaped article of claim 8 obtained by molding.
Claim 12
Dependent Claim
12 words
The shaped article of claim 8 in the form of a film.
Claim 13
Dependent Claim
12 words
The shaped article of claim 8 in the form of a tube.
Claim 14
Dependent Claim
12 words
The shaped article of claim 8 in the form of a rod.
Claim 15
Dependent Claim
9 words
Electrical cable jacketing including the composition of claim 1.
Claim 16
Dependent Claim
9 words
The prepolymer of claim 1 which is melt processible.
Claim 17
Dependent Claim
11 words
The prepolymer of claim 1 which is low temperature melt processible.
Claim 18
Dependent Claim
14 words
The cured polymer comprising the product obtained by curing the prepolymer of claim 1.
Claim 19
Dependent Claim
8 words
The adhesive of claim 4 which is cured.
Claim 20
Dependent Claim
8 words
The sealant of claim 5 which is cured.
Claim 21
Dependent Claim
11 words
The coated substrate of claim 6 wherein said coating is cured.
Claim 22
Dependent Claim
11 words
The coated fabric of claim 7 wherein the coating is cured.
Claim 23
Dependent Claim
9 words
The shaped article of claim 8 which is cured.
Claim 24
Dependent Claim
12 words
The shaped article of claim 10, 12 or 13 which is cured.
Claim 25
Dependent Claim
8 words
The film of claim 11 which is cured.
Claim 26
Dependent Claim
17 words
The film of claim 24 having a tensile strength in at least one direction exceeding 500 psi.
Claim 27
Dependent Claim
12 words
The film of claim 24 having an elongation greater than 200 percent.
Claim 28
Dependent Claim
9 words
The film of claim 24 having high abrasion resistance.
Claim 29
Dependent Claim
13 words
The film of claim 24 having a tear initiation strength exceeding 170 pli.
Claim 30
Dependent Claim
17 words
The film of claim 24 having a tear propagation strength exceeding 0.10 lbs at 0.30 mm thickness.
Claim 31
Dependent Claim
25 words
The film of claim 24 wherein said polyol is polyoxyethylene, said film having a moisture vapor transmission rate exceeding 5000 gms/m 2 ·24 hours·2 mils.
Claim 32
Dependent Claim
25 words
The film of claim 24 wherein said polyol is polyoxyethylene, said film having a moisture vapor transmission rate exceeding 10000 gms/m 2 ·24 hours·2 mils.
Claim 33
Dependent Claim
25 words
The film of claim 24 wherein said polyol is polyoxyethylene, said film having a moisture vapor transmission rate exceeding 15000 gms/m 2 ·24 hours·2 mils.
Claim 34
Dependent Claim
26 words
The coated fabric of claim 21 wherein said polyol is polyoxyethylene, said coated fabric having a moisture vapor transmission rate exceeding 3000 gms/m 2 ·24 hours.
Claim 35
Dependent Claim
28 words
The coated fabric of claim 21 wherein said polyol is polyoxyethylene, said coated fabric having a moisture vapor transmission rate exceeding 50 percent that of said fabric alone.
Claim 36
Dependent Claim
28 words
The coated fabric of claim 21 wherein said polyol is polyoxyethylene, said coated fabric having a moisture vapor transmission rate exceeding 75 percent that of said fabric alone.
Claim 37
Dependent Claim
25 words
The coated fabric of claim 21 wherein said polyol is polyoxyethylene, said coated fabric having a moisture vapor transmission rate comparable to the fabric alone.
Claim 38
Dependent Claim
12 words
The prepolymer of claim 15 wherein said chain extender is a glycol.
Claim 39
Dependent Claim
13 words
The prepolymer of claim 15 wherein said chain extender is an aromatic diamine.
Claim 40
Dependent Claim
12 words
The prepolymer of claim 15 wherein said chain extender is an alkanolamine.
Claim 41
Dependent Claim
13 words
The prepolymer of claim 15 wherein said chain extender is a hydroxy arylamine.
Claim 42
Dependent Claim
13 words
The prepolymer of claim 15 wherein said chain extender is an aliphatic diamine.
Claim 43
Dependent Claim
30 words
The prepolymer of claim 15 wherein said chain extender is a combination of chain extenders selected from the class consisting of aromatic diamines, aliphatic diamines, glycols, alkanolamines and hydroxy acylamines.
Claim 44
Dependent Claim
12 words
The coated substrate of claim 6 wherein said substrate is expanded polytetrafluoroethylene.
Claim 45
Dependent Claim
26 words
The cured polymer of claim 17 being a thermoplastic polyurethane having a melt processing temperature substantially in excess of the melt processing temperature of said prepolymer.
Claim 46
Dependent Claim
17 words
The film of claim 27 wherein the polyol is polyoxyethylene and said abrasion resistance exceeds 1000 cycles.
Claim 47
Dependent Claim
11 words
The prepolymer of claim 1 having storage stability exceeding one month.
Claim 48
Dependent Claim
12 words
The electrical cable jacketing of claim 14 wherein said composition is cured.
Claim 49
Dependent Claim
52 words
The prepolymer of claim 1 comprising the reaction product of: (i) a polyol (A) having a number average molecular weight of from about 600 to about 3500; (ii) a diisocyanate (B); and (III) a low molecular weight bifunctional chain extender (C) having a molecular weight in a range lower than about 500.
Claim 50
Dependent Claim
14 words
The cured polymer comprising the product obtained by curing the prepolymer of claim 48.
Claim 51
Dependent Claim
53 words
The prepolymer of claim 1 comprising the reaction product of: (a) a poly(alkylene ether)glycol (A) having a number average molecular weight of from about 600 to about 3500; (ii) a diisocyanate (B); and (iii) a low molecular weight bifunctional chain extender (C) having a molecular weight in a range lower than about 500.
Claim 52
Dependent Claim
14 words
The cured polymer comprising the product obtained by curing the prepolymer of claim 50.
Claim 53
Dependent Claim
12 words
The coated substrate of claim 20 wherein said substrate is expanded polytetrafluoroethylene.
Claim 54
Dependent Claim
17 words
The film of claim 27 wherein the polyol is polyoxyethylene and said abrasion resistance exceeds 4000 cycles.
Claim 55
Dependent Claim
17 words
The film of claim 24 having a tensile strength in at least one direction exceeding 1000 psi.
Claim 56
Dependent Claim
17 words
The film of claim 24 having a tensile strength in at least one direction exceeding 2000 psi.
Claim 57
Dependent Claim
17 words
The film of claim 24 having a tensile strength in at least one direction exceeding 5000 psi.
Claim 58
Dependent Claim
18 words
The shaped article of claim 22 having a tensile strength in at least one direction exceeding 500 psi.
Claim 59
Dependent Claim
17 words
The film of claim 24 having a tear propagation strength exceeding 0.02 lbs at 0.20 mm thickness.
Claim 60
Dependent Claim
18 words
The shaped article of claim 22 having a tensile strength in at least one direction exceeding 5000 psi.
References Cited (Backward Citations)
US2917486A
Cited
US3164565A
Cited
US3471445A
Cited
US3915937A
Cited
US3901852A
Cited
US4273911A
Cited
US4239879A
Cited
US4367327A
Cited
US4377645A
Cited
US4321333A
Cited
US4381388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |