Patent US4310448A successfully refreshed from Google Patents.
US4310448A
Expired / Lapsed
US
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Process for the preparation of stable ionic dispersions
Assignee: Bayer AG
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Filing: 1977-06-08
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Granted: 1982-01-12
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Expires: 1997-06-08
Abstract
Abstract The present invention relates to a process for the "in situ" preparation of stable dispersions of polyisocyanate polyaddition products in hydroxyl containing compounds as dispersing agents which comprises reacting 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in 3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and at least one of the components 1 or 2 having ionic groups and/or groups capable of salt formation, in the presence of from 2 to 50% by weight of water, based on the total quantity of reaction mixture, the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or the solution of an ionic polyurethane. The invention also relates to the use of the stable dispersions made by the above process in making polyurethane resins.
Inventors
- 👤 Artur Reischl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84; C08G18/08; C08G18/0804; C08G18/10; C08G18/12; C08G18/28; C08G18/40; C08G18/409
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
In a process for the "in situ" preparation of stable dispersions of polyisocyanate polyaddition products in hydroxyl containing compounds as dispersing agents which comprises reacting 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in 3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and at least one of the components 1 or 2 having ionic groups and/or groups capable of salt formation, in the presence of from 2 to 50% by weight of water, based on the total quantity of reaction mixture the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or the solution of an ionic polyurethane.
Claim 2
Dependent Claim
126 words
In a process for the "in situ" preparation of stable dispersions of polyisocyanate polyaddition products in hydroxyl containing compounds as dispersing agents which comprises reacting 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in 3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and at least one of the components 1 or 2 having ionic groups and/or groups capable of salt formation, in the presence of from 2 to 50% by weight of water, based on the total quantity of reaction mixture the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or the solution of an ionic polyurethane.
Claim 3
Dependent Claim
37 words
The process of claim 1, wherein an aqueous polymer latex or the aqueous solution of an ionic polyurethane is added to the dispersing agent containing hydroxyl groups, and the polyisocyanate polyaddition products are thereafter prepared in situ.
Claim 4
Dependent Claim
23 words
The process of claim 2, wherein an aqueous polymer dispersion having a solid content of between 5 and 55% by weight is used.
Claim 5
Dependent Claim
46 words
The process of claim 1, wherein the dispersion of a vinyl polymer or of a polycondensation product in the dispersing agent containing hydroxyl groups is first prepared in situ in known manner and the polyisocyanate polyaddition reaction is thereafter carried out in the presence of water.
Claim 6
Dependent Claim
37 words
The process of claim 1, wherein the polymer dispersed in a non-aqueous organic medium is added to the dispersing agent containing hydroxyl groups and thereafter the polyisocyanate polyaddition reaction is carried out after the addition of water.
Claim 7
Dependent Claim
137 words
In a process for the production of polyurethane resins in which polyisocyanates are reacted with compounds containing active hydrogen atoms wherein the active hydrogen containing compound is produced from a reaction which comprises reacting in situ 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in 3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and at least one of the components 1 or 2 having ionic groups and/or groups capable of salt formation, in the presence of from 2 to 50% by weight of water, based on the total quantity of reaction mixture the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or the solution of an ionic polyurethane.
Claim 8
Dependent Claim
137 words
In a process for the production of polyurethane resins in which polyisocyanates are reacted with compounds containing active hydrogen atoms wherein the active hydrogen containing compound is produced from a reaction which comprises reacting in situ 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in 3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and at least one of the components 1 or 2 having ionic groups and/or groups capable of salt formation, in the presence of from 2 to 50% by weight of water, based on the total quantity of reaction mixture the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or the solution of an ionic polyurethane.
Claim 9
Dependent Claim
37 words
The process of claim 6, wherein an aqueous polymer latex or the aqueous solution of an ionic polyurethane is added to the dispersing agent containing hydroxyl groups, and the polyisocyanate polyaddition products are thereafter prepared in situ.
Claim 10
Dependent Claim
23 words
The process of claim 6, wherein an aqueous polymer dispersion having a solid content of between 5 and 55% by weight is used.
Claim 11
Dependent Claim
46 words
The process of claim 6, wherein the dispersion of a vinyl polymer or of a polycondensation product in the dispersing agent containing hydroxyl groups is first prepared in situ in known manner and the polyisocyanate polyaddition reaction is thereafter carried out in the presence of water.
Claim 12
Dependent Claim
37 words
The process of claim 6, wherein the polymer dispersed in a non-aqueous organic medium is added to the dispersing agent containing hydroxyl groups and thereafter the polyisocyanate polyaddition reaction is carried out after the addition of water.
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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) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |