US4745135A
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Polyurethanes prepared from liquid crystal-containing polyols
Assignee: Dow Chemical Co
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Filing: 1987-07-14
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Granted: 1988-05-17
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Expires: 2007-07-14
Abstract
Abstract Polyurethanes are prepared from a polyol which itselve contains liquid crystalline moieties or which contains dispersed or dissolved liquid crystalline polymers. The use of this polyol is found to provide improved properties to polyurethanes, especially flexible polyurethane foams, which exhibit improved load bearing.
Inventors
- 👤 Oomman P. Thomas
- 👤 Robert B. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:21
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/635; C08G18/638; C08G18/70; C08G18/81; C08G18/8108; C08G18/8116; C08L; C08L75/00; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3885; C08G2250/00; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 56
Claim 1
Independent Claim
25 words
A solution or colloidal dispersion of a liquid crystalline polymer in an active hydrogen-containing compound having an average of at least two active hydrogen-containing moieties.
Claim 2
Dependent Claim
25 words
A solution or colloidal dispersion of a liquid crystalline polymer in an active hydrogen-containing compound having an average of at least two active hydrogen-containing moieties.
Claim 3
Dependent Claim
20 words
The solution or dispersion of claim 1 wherein the active hydrogen-containing compound contains at least two hydroxyl groups per molecule.
Claim 4
Dependent Claim
23 words
The solution or dispersion of claim 1 wherein the active hydrogen-containing compound contains at least two primary or secondary amine groups per molecule.
Claim 5
Dependent Claim
39 words
The solution or dispersion of claim 1 wherein said liquid crystalline polymer is dissolved in the active hydrogen containing compound, and the solution contains about 1-20 parts of the liquid crystal-containing polymer per 100 parts of active hydrogen-containing compound.
Claim 6
Dependent Claim
35 words
The solution of claim 4 wherein the active hydrogen-containing compound comprises a polyether polyol having an average equivalent weight of about 800 to about 3000 and an average functionality of about 2 to about 4.
Claim 7
Dependent Claim
19 words
The solution of claim 5 wherein the active hydrogen-containing compound further comprises a glycol and/or aromatic amine chain extender.
Claim 8
Dependent Claim
31 words
The solution of claim 4 wherein the active hydrogen-containing compound has an average equivalent weight of about 31 to about 400 and an average functionality of about 3 to about 8.
Claim 9
Dependent Claim
40 words
The solution or dispersion of claim 1 wherein said liquid crystalline polymer is colloidally dispersed in the active hydrogen-containing compound, and the dispersion contains about 3 to about 60 parts of liquid crystalline polymer per 100 parts active hydrogen-containing compound.
Claim 10
Dependent Claim
35 words
The dispersion of claim 8 wherein the active hydrogen-containing compound comprises a polyether polyol having an average equivalent weight of about 800 to about 3000 and an average functionality of about 2 to about 4.
Claim 11
Dependent Claim
19 words
The dispersion of claim 9 wherein the active hydrogen-containing compound further comprises a glycol and/or aromatic amine chain extruder.
Claim 12
Dependent Claim
31 words
The dispersion of claim 8 wherein the active hydrogen-containing compound has an average equivalent weight of about 31 to about 400 and an average functionality of about 3 to about 8.
Claim 13
Dependent Claim
23 words
The solution or dispersion of claim 1 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated derivative of benzoic acid.
Claim 14
Dependent Claim
22 words
The solution or dispersion of claim 1 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated Schiff base derivative.
Claim 15
Dependent Claim
20 words
The solution or dispersion of claim 1 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated steroid.
Claim 16
Dependent Claim
21 words
The solution or dispersion of claim 14 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated cholesterol derivative.
Claim 17
Dependent Claim
25 words
The solution or dispersion of claim 15 wherein said liquid crystalline polymer is a polymer of the reaction product of an unsaturated isocyanate and cholesterol.
Claim 18
Dependent Claim
33 words
The solution or dispersion of claim 16 wherein said liquid crystalline polymer is a copolymer of the reaction product of an unsaturated isocyanate and cholesterol, and at least one other non-mesogenic copolymerizable monomer.
Claim 19
Dependent Claim
41 words
The solution or dispersion of claim 12, 13, 14 or 17 wherein said active hydrogen-containing compound comprises a polyether polyol having an average equivalent weight of about 800 to about 3000 and an average functionality of about 2 to about 4.
Claim 20
Dependent Claim
37 words
The solution or dispersion of claim 12, 13, 14 or 17 wherein said active hydrogen-containing compound has an average equivalent weight from about 31 to about 400 and an average functionality from about 3 to about 8.
Claim 21
Dependent Claim
40 words
A polyurethane and/or polyurea polymer prepared by reacting a polyisocyanate with a liquid crystal-containing polyol or a solution or dispersion of a liquid crystalline polymer in an active hydrogen-containing compound having an average of least two isocyanate-reactive groups per molecule.
Claim 22
Dependent Claim
40 words
A polyurethane and/or polyurea polymer prepared by reacting a polyisocyanate with a liquid crystal-containing polyol or a solution or dispersion of a liquid crystalline polymer in an active hydrogen-containing compound having an average of least two isocyanate-reactive groups per molecule.
Claim 23
Dependent Claim
37 words
The polyurethane and/or polyurea of claim 20 wherein the polyisocyanate is reacted with a solution or dispersion of a liquid crystalline polymer in an active-containing compound having an average of at least two isocyanate-reactive groups per molecule.
Claim 24
Dependent Claim
22 words
The polyurethane and/or polyurea polymer of claim 21 wherein wherein the active hydrogen-containing compound contains at least two hydroxyl groups per molecule.
Claim 25
Dependent Claim
24 words
The polyurethane and/or polyurea polymer of claim 21 wherein the active hydrogen-containing compound contains at least two primary or secondary amine groups per molecule.
Claim 26
Dependent Claim
40 words
The polyurethane and/or polyurea polymer of claim 21 herein said liquid crystalline polymer is dissolved in the active hydrogen containing compound, and the solution contains about 1-20 parts of the liquid crystal-containing polyol per 100 parts of active hydrogen-containing compound.
Claim 27
Dependent Claim
38 words
The polyurethane and/or polyurea polymer of claim 24 wherein the active hydrogen-containing compound comprises a polyether polyol having an average equivalent weight of about 800 to about 3000 and an average functionality of about 2 to about 4.
Claim 28
Dependent Claim
22 words
The polyurethane and/or polyurea polymer of claim 25 wherein the active hydrogen-containing compound further comprises a glycol and/or aromatic amine chain extender.
Claim 29
Dependent Claim
34 words
The polyurethane and/or polyurea polymer of claim 24 wherein the active hydrogen-containing compound has an average equivalent weight of about 31 to about 400 and an average functionality of about 3 to about 8.
Claim 30
Dependent Claim
41 words
The polyurethane and/or polyurea polymer of claim 21 wherein said liquid crystalline polymer is colloidally dispersed in the active hydrogen-containing compound, and the dispersion contains about 3 to about 60 parts of liquid crystalline polymer per 100 parts active hydrogen-containing compound.
Claim 31
Dependent Claim
38 words
The polyurethane and/or polyurea polymer of claim 28 wherein the active hydrogen-containing compound comprises a polyether polyol having an average equivalent weight of about 800 to about 3000 and an average functionality of about 2 to about 4.
Claim 32
Dependent Claim
22 words
The polyurethane and/or polyurea polymer of claim 29 wherein the active hydrogen-containing compound further comprises a glycol and/or aromatic amine chain extender.
Claim 33
Dependent Claim
34 words
The polyurethane and/or polyurea polymer of claim 28 wherein the active hydrogen-containing compound has an average equivalent weight of about 31 to about 400 and an average functionality of about 3 to about 8.
Claim 34
Dependent Claim
24 words
The polyurethane and/or polyurea polymer of claim 21 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated derivative of benzoic acid.
Claim 35
Dependent Claim
23 words
The polyurethane and/or polyurea polymer of claim 22 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated Schiff base derivative.
Claim 36
Dependent Claim
21 words
The polyurethane and/or polyurea polymer of claim 21 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated steroid.
Claim 37
Dependent Claim
22 words
The polyurethane and/or polyurea polymer of claim 34 wherein said liquid crystalline polymer is a polymer of an ethylenically unsaturated cholesterol derivative.
Claim 38
Dependent Claim
26 words
The polyurethane and/or polyurea polymer of claim 35 wherein said liquid crystalline polymer is a polymer of the reaction product of an unsaturated isocyanate and cholesterol.
Claim 39
Dependent Claim
34 words
The polyurethane and/or polyurea polymer of claim 36 wherein said liquid crystalline polymer is a copolymer of the reaction product of an unsaturated isocyanate and cholesterol, and at least one other non-mesogenic copolymerizable monomer.
Claim 40
Dependent Claim
42 words
The polyurethane and/or polyurea polymer of claim 32, 33, 34, or 37 wherein said active hydrogen-containing compound comprises a polyether polyol having an average equivalent weight of about 800 to about 3000 and an average functionality of about 2 to about 4.
Claim 41
Dependent Claim
13 words
The polyurethane and/or polyurea polymer of claim 38 which is a flexible foam.
Claim 42
Dependent Claim
31 words
The polyurethane and/or polyurea polymer of claim 38 wherein said polyisocyanate is reacted with said solution or dispersion in the presence of a blowing agent, a catalyst, and a silicone surfactant.
Claim 43
Dependent Claim
20 words
The polyurethane and/or polyurea polymer of claim 40 wherein said polyisocyanate comprises toluene-diisocyanate, diphenylmethanediisocyanate, or a derivative or prepolymer thereof.
Claim 44
Dependent Claim
18 words
The polyurethane and/or polyurea polymer of claim 20 wherein said polyisocyanate is reacted with a liquid crystal-containing polyol.
Claim 45
Dependent Claim
17 words
The polyurethane and/or polyurea polymer of claim 42 wherein said liquid crystal-containing polyol is a hydroxyalkylcellulose-initiated polyether.
Claim 46
Dependent Claim
40 words
The polyurethane and/or polyurea polymer of claim 42 wherein said liquid crystal-containing polyol is the reaction product of an ethylenically unsaturated polyether, an ethylenically unsaturated liquid crystalline monomer and a secondary monomer containing both ethylenic unsaturation and an isocyanate-reactive group.
Claim 47
Dependent Claim
14 words
A crosslinked, noncellular or microcellular polyurethane and/or polyurea polymer containing a liquid crystalline polymer.
Claim 48
Dependent Claim
14 words
A crosslinked, noncellular or microcellular polyurethane and/or polyurea polymer containing a liquid crystalline polymer.
Claim 49
Dependent Claim
17 words
A crosslinked, noncellular or microcellular polyurethane and/or polyurea polymer which is prepared from a liquid crystal-containing polyol.
Claim 50
Dependent Claim
17 words
A crosslinked, noncellular or microcellular polyurethane and/or polyurea polymer which is prepared from a liquid crystal-containing polyol.
Claim 51
Dependent Claim
17 words
The polyurethane and/or polyurea polymer of claim 46 which is prepared by a reaction injection molding process.
Claim 52
Dependent Claim
16 words
The polyurethane and/or polyurea polymer of claim 46 which is prepared by a solventless casting process.
Claim 53
Dependent Claim
10 words
A polyurethane and/or polyurea foam containing a liquid crystalline polymer.
Claim 54
Dependent Claim
10 words
A polyurethane and/or polyurea foam containing a liquid crystalline polymer.
Claim 55
Dependent Claim
13 words
A polyurethane and/or polyurea foam which is prepared from a liquid crystal-containing polyol.
Claim 56
Dependent Claim
13 words
A polyurethane and/or polyurea foam which is prepared from a liquid crystal-containing polyol.
References Cited (Backward Citations)
US3872050A
Cited
JPS56152830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |