US4089835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable polyurethane dispersions and process for production thereof
Assignee: Bayer AG
•
Filing: 1976-05-28
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Granted: 1978-05-16
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Expires: 1996-05-28
Abstract
Abstract The instant invention is directed to stable dispersions and the process of their manufacture. The stable dispersions of the instant invention comprise polyureas and/or polyhydrazo-dicarbonamides as the disperse phase in an hydroxyl group containing material selected from the group consisting of polyethers, polyesters, polyester amides, polycarbonates, and mixtures thereof, and are produced by reacting (1) organic polyisocyanates with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides in (3) the hydroxyl group containing material. Component (3) may also contain relatively low molecular weight polyols and/or inert organic solvents. Components (1), (2) and (3) are continuously introduced into a flow mixer in such a quantity that the average residence time in the mixer is less than ten minutes.
Inventors
- 👤 Klaus Konig
- 👤 Manfred Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:22
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0871; C08G18/0876; C08G18/10; C08G18/2805; C08G18/30; C08G18/32; C08G18/3225; C08G18/40; C08G18/409; Y; Y10; Y10S; Y10S516/00; Y10S516/924; Y10S516/928
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
131 words
A process for the in situ production of stable dispersions of polyureas and/or polyhydrazodicarbonamides in a hydroxyl group containing material selected from the group consisting of polyethers, polyesters, polyester amides, polycarbonates and mixtures thereof, by reacting: (1) organic polyisocyanates, with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides, in (3) said hydroxyl group containing material; wherein components (1), (2) and (3) are continuously introduced into a flow mixer in such a quantity that the average residence time in the mixer is less than 10 minutes, the equivalent ratio between components (1) and (2) being from 0.8:1 to 1.05:1, and the reaction product issuing from the flow mixer is subsequently collected in a receiver, said stable dispersions having a solids content of from 1 to 35% by weight.
Claim 2
Dependent Claim
131 words
A process for the in situ production of stable dispersions of polyureas and/or polyhydrazodicarbonamides in a hydroxyl group containing material selected from the group consisting of polyethers, polyesters, polyester amides, polycarbonates and mixtures thereof, by reacting: (1) organic polyisocyanates, with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides, in (3) said hydroxyl group containing material; wherein components (1), (2) and (3) are continuously introduced into a flow mixer in such a quantity that the average residence time in the mixer is less than 10 minutes, the equivalent ratio between components (1) and (2) being from 0.8:1 to 1.05:1, and the reaction product issuing from the flow mixer is subsequently collected in a receiver, said stable dispersions having a solids content of from 1 to 35% by weight.
Claim 3
Dependent Claim
20 words
A process as claimed in claim 1 wherein components (1), (2) and (3) are separately introduced into the flow mixer.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1, wherein component (1) is introduced separately from a mixture of components (2) and (3).
Claim 5
Dependent Claim
27 words
A process as claimed in claim 1, wherein the receiver is maintained at temperatures of from 50° to 150° C, and wherein the components are stirred therein.
Claim 6
Dependent Claim
31 words
A process as claimed in claim 1, wherein said hydroxyl group containing material is a polyether with at least two hydroxyl groups and a molecular weight of from 200 to 16,000.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 1, wherein said hydroxyl group containing material is selected from the group consisting of polyesters, polyester amides, and polycarbonates having molecular weights of from 400 to 16,000.
Claim 8
Dependent Claim
22 words
A process as claimed in claim 1, wherein said hydroxyl group containing material has a molecular weight of from 500 to 12,000.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 7, wherein component (3) contains an effective amount of polyols having molecular weights up to 400.
Claim 10
Dependent Claim
15 words
A process as claimed in claim 1, wherein component (3) contains an inert organic solvent.
Claim 11
Dependent Claim
20 words
A process as claimed in claim 9, wherein said solvent is removed from said dispersion upon completion of the reaction.
Claim 12
Dependent Claim
27 words
A process as claimed in claim 1, wherein linear polyethers containing one or two terminal amino, semicarbazide or isocyanate groups are used for stabilizing the dispersions formed.
Claim 13
Dependent Claim
122 words
Stable dispersions of polyureas and/or polyhydrazodicarbonamides in hydroxyl group containing materials selected from the group consisting of polyethers, polyesters, polyester amides, polycarbonates and mixtures thereof, obtained by reacting: (1) organic polyisocyanates, with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides in (3) said hydroxyl group containing material, by continuously introducing components (1), (2) and (3) into a flow mixer in such a quantity that the average residence time in the mixer is less than 10 minutes, the equivalent ratio between components (1) and (2) being from 0.8:1 to 1.05:1, and subsequently collecting the reaction product issuing from the flow mixer in a receiver, said stable dispersions having a solids content of from a 1 to 35% by weight.
Claim 14
Dependent Claim
122 words
Stable dispersions of polyureas and/or polyhydrazodicarbonamides in hydroxyl group containing materials selected from the group consisting of polyethers, polyesters, polyester amides, polycarbonates and mixtures thereof, obtained by reacting: (1) organic polyisocyanates, with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides in (3) said hydroxyl group containing material, by continuously introducing components (1), (2) and (3) into a flow mixer in such a quantity that the average residence time in the mixer is less than 10 minutes, the equivalent ratio between components (1) and (2) being from 0.8:1 to 1.05:1, and subsequently collecting the reaction product issuing from the flow mixer in a receiver, said stable dispersions having a solids content of from a 1 to 35% by weight.
Claim 15
Dependent Claim
29 words
Stable dispersions produced as in claim 12 with the additional steps of storing and diluting said reaction product with hydroxyl containing material and/or storing and dehydrating said reaction product.
Claim 16
Dependent Claim
19 words
Dispersions as claimed in claim 12, wherein components (1), (2) and (3) are separately introduced into the flow mixer.
Claim 17
Dependent Claim
20 words
Dispersions as claimed in claim 12, wherein component (1) is introduced separately from a mixture of components (2) and (3).
Claim 18
Dependent Claim
26 words
Dispersions as claimed in claim 12, wherein the receiver is maintained at temperatures of from 50° to 150° C, and wherein the components are stirred therein.
Claim 19
Dependent Claim
17 words
Dispersions as claimed in claim 12, containing from 1 to 35% by weight, of polyureas and/or polyhydrazodicarbonamides.
Claim 20
Dependent Claim
24 words
Dispersions as claimed in claim 12, having a viscosity of less than 2500 cP/25° C at a solids content of approximately 10% by weight.
Claim 21
Dependent Claim
24 words
Dispersions as claimed in claim 12, wherein said hydroxyl group containing material is a polyether having a molecular weight of from 200 to 16,000.
Claim 22
Dependent Claim
58 words
The process of claim 1 wherein, in addition to components (1), (2) and (3), a compound selected from the group consisting of monofunctional organic isocyanates, monofunctional primary amines, monofunctional secondary amines and monofunctional hydrazine derivatives and monofunctional hydrazides are introduced into the flow mixer in a quantity of up to 40 mol%, based on components (1) and (2).
Claim 23
Dependent Claim
36 words
The process of claim 1 wherein, in addition to components (1), (2) and (3), an alkanolamine is introduced into the flow mixer in a quantity of up to 40 mol% based on components (1) and (2).
Claim 24
Dependent Claim
29 words
A process as claimed in claim 1 comprising the further steps of storing and diluting said reaction product with hydroxyl containing material and/or storing and dehydrating said reaction product.
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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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |