US4789718A
Expired / Lapsed
US
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Polyurethanes soluble or dissolved in aromatic hydrocarbons, a process for their preparation and their use
Assignee: Bayer AG
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Filing: 1985-05-03
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Granted: 1988-12-06
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Expires: 2005-05-03
Abstract
Abstract The present invention is directed to substantially linear polyurethanes obtained from 1 mol of relatively high molecular weight macrodiols such as polyesters, polyethers and polycarbonates having a molecular weight of 400 to 5000, preferably about 500 to 3000, about 1.5 to 16.5 mols of aromatic diisocyanates, optionally about 0.01 to 1 mol of chain breaking agents in the form of compounds which are monofunctional in their reaction with isocyanates, and about 0.5 to 15 mols of low molecular weight, difunctional chain lengthening agents, characterized in that at least 10 mol-% of the chain lengthening agents is 2,2,4-trimethylpentanediol-(1,3) and the remaining chain lengthening agents, having molecular weights of 62 to 399 (preferably 62 to 250), are preferably diols. The present invention also relates to a process for the preparation of these polyurethanes and to their use for the production of coatings on flexible or non-flexible substrates, wherein the coatings are optionally filled, preferably with magnetizable pigments, and are optionally cross-linked.
Inventors
- 👤 Klaus Noll
- 👤 Josef Pedain
- 👤 Manfred Schonfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/28; C08G18/2805; C08G18/65; C08G18/66; C08G18/6603; C08G18/6607; C09; C09D; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
104 words
A substantially linear polyurethane which is soluble in aromatic hydrocarbons or mixtures containing aromatic hydrocarbons and comprises the reaction product of (i) 1 mol of a macrodiol having a molecular weight of 400 to 5000, (ii) about 0.5 to 15 mols of a chain lengthening agent having a molecular weight of 62 to 399 wherein 10 to 100 mol-% of said chain lengthening agent is 2,2,4-trimethylpentane-diol-(1,3), (iii) optionally about 0.01 to 1 mol of a chain breaking compound which is monofunctional in the isocyanate polyaddition reaction and (iv) about 1.5 to 16.5 mol of an organic polyisocyanate which consists essentially of an aromatic diisocyanate.
Claim 2
Dependent Claim
104 words
A substantially linear polyurethane which is soluble in aromatic hydrocarbons or mixtures containing aromatic hydrocarbons and comprises the reaction product of (i) 1 mol of a macrodiol having a molecular weight of 400 to 5000, (ii) about 0.5 to 15 mols of a chain lengthening agent having a molecular weight of 62 to 399 wherein 10 to 100 mol-% of said chain lengthening agent is 2,2,4-trimethylpentane-diol-(1,3), (iii) optionally about 0.01 to 1 mol of a chain breaking compound which is monofunctional in the isocyanate polyaddition reaction and (iv) about 1.5 to 16.5 mol of an organic polyisocyanate which consists essentially of an aromatic diisocyanate.
Claim 3
Dependent Claim
25 words
The polyurethane of claim 1 wherein said chain lengthening agent contains 40 to 100 mol-% of 2,2,4-trimethylpentanediol-(1,3) and up to 60 mol-% of other diols.
Claim 4
Dependent Claim
25 words
The polyurethane of claim 1 wherein said chain lengthening agent contains 75 to 100 mol-%, of 2,2,4-trimethylpentanediol-(1,3) and up to 25 mol-% of other diols.
Claim 5
Dependent Claim
14 words
The polyurethane of claim 1 wherein said macrodiol is a polyester and/or polyether diol.
Claim 6
Dependent Claim
25 words
The polyurethane of claim 4 wherein said chain lengthening agent contains 75 to 100 mol-% of 2,2,4-trimethylpentanediol-(1,3) and up to 25 mol-% of other diols.
Claim 7
Dependent Claim
131 words
A process for the preparation of a linear polyurethane which is soluble in aromatic hydrocarbons or mixtures containing aromatic hydrocarbons which comprises reacting at temperatures of about 50° to 180° C. (i) 1 mol of a macrodiol having a molecular weight of 400 to 5000, (ii) about 0.1 to 15 mol of a difunctional chain lengthening agent having a molecular weight of 62 to 399 wherein 10 to 100 mol-% of said chain lengthening agent is 2,2,4-trimethylpentanediol(1,3), and (iii) optionally about 0.1 to 1 mol of a chain breaking compound which is monofunctional in the polyisocyanate polyaddition reaction with (iv) about 1.5 to 16.5 mol of an organic polyisocyanate which consists essentially of an aromatic diisocyanate, (v) optionally in the presence of a solvent or solvent mixture containing an aromatic hydrocarbon.
Claim 8
Dependent Claim
131 words
A process for the preparation of a linear polyurethane which is soluble in aromatic hydrocarbons or mixtures containing aromatic hydrocarbons which comprises reacting at temperatures of about 50° to 180° C. (i) 1 mol of a macrodiol having a molecular weight of 400 to 5000, (ii) about 0.1 to 15 mol of a difunctional chain lengthening agent having a molecular weight of 62 to 399 wherein 10 to 100 mol-% of said chain lengthening agent is 2,2,4-trimethylpentanediol(1,3), and (iii) optionally about 0.1 to 1 mol of a chain breaking compound which is monofunctional in the polyisocyanate polyaddition reaction with (iv) about 1.5 to 16.5 mol of an organic polyisocyanate which consists essentially of an aromatic diisocyanate, (v) optionally in the presence of a solvent or solvent mixture containing an aromatic hydrocarbon.
Claim 9
Dependent Claim
14 words
The process of claim 6 wherein said macrodiol is a polyester and/or polyether diol.
Claim 10
Dependent Claim
19 words
The process of claim 6 wherein said chain lengthening agent contains up to about 90 mol-% of other diols.
Claim 11
Dependent Claim
16 words
The process of claim 6 wherein said chain breaking compound has 1 to 18 carbon atoms.
Claim 12
Dependent Claim
23 words
A process for the production of a coated substrate which comprises coating a flexible or non-flexible substrate with the polyurethane of claim 1.
Claim 13
Dependent Claim
13 words
The process of claim 10 wherein said polyurethane is pigmented with magnetizable pigments.
Claim 14
Dependent Claim
29 words
The process of claim 10 wherein said polyurethane is applied in the form of a solution in an aromatic hydrocarbon or in a solvent mixture containing an aromatic hydrocarbon.
Claim 15
Dependent Claim
29 words
The process of claim 10 wherein said polyurethane is applied in the form of a solution in an aromatic hydrcarbon or in a solvent mixture containing an aromatic hydrocarbon.
Claim 16
Dependent Claim
43 words
The process of claim 10 wherein said polyurethane is cross-linked with a melamine hexamethylol ether, an unblocked or blocked polyisocyanate, an isocyanate prepolymer, a polyaziridine compound or a melamine or urea formaldehyde resin which is partially or completely etherified with a monohydric alcohol.
Claim 17
Dependent Claim
43 words
The process of claim 11 wherein said polyurethane is cross-linked with a melamine hexamethylol ether, an unblocked or blocked polyisocyanate, an isocyanate prepolymer, a polyaziridine compound or a melamine or urea formaldehyde resin which is partially or completely etherified with a monohydric alcohol.
Claim 18
Dependent Claim
43 words
The process of claim 12 wherein said polyurethane is cross-linked with a melamine hexamethylol ether, an unblocked or blocked polyisocyanate, an isocyanate prepolymer, a polyaziridine compound or a melamine or urea formaldehyde resin which is partially or completely etherified with a monohydric alcohol.
Claim 19
Dependent Claim
43 words
The process of claim 13 wherein said polyurethane is cross-linked with a melamine hexamethylol ether, an unblocked or blocked polyisocyanate, an isocyanate prepolymer, a polyaziridine compound or a melamine or urea formaldehyde resin which is partially or completely etherified with a monohydric alcohol.
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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 |