US4310449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of stable dispersions
Assignee: Bayer AG
•
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, by a process which comprises reacting 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia in 3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and wherein the starting components are reacted together in the presence of more than 4% by weight of water, based on the reaction mixture including water, the process being characterized in that the polyisocyanate polyaddition reaction is carried out in the presence of a polymer latex or in the solution of an ionic, linear polyurethane. If desired, the water is subsequently removed in known manner. The invention also relates to the use of the dispersions made by this process in preparing polyurethane resins.
Inventors
- 👤 Artur Reischl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84; C08G18/08; C08G18/0804; C08G18/10; C08G18/12; C08G18/28; C08G18/30; C08G18/302
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
In a process for "in situ" preparation of stable dispersions of non-ionic polyisocyanate polyaddition products in compounds with hydroxyl groups as dispersing agents which comprises reacting 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia in 3. compounds having at least one hydroxyl group, wherein compounds (3) having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and wherein the components are reacted together in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water, the water being subsequently removed in known manner if desired the improvement which comprises reacting said components in the presence of a polymer latex or solution of an ionic polyurethane.
Claim 2
Dependent Claim
124 words
In a process for "in situ" preparation of stable dispersions of non-ionic polyisocyanate polyaddition products in compounds with hydroxyl groups as dispersing agents which comprises reacting 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia in 3. compounds having at least one hydroxyl group, wherein compounds (3) having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and wherein the components are reacted together in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water, the water being subsequently removed in known manner if desired the improvement which comprises reacting said components in the presence of a polymer latex or solution of an ionic polyurethane.
Claim 3
Dependent Claim
36 words
The process of claim 1, wherein an aqueous polymer latex or the aqueous solution of an ionic polyurethane is added to the hydroxyl containing dispersing agent and the polyisocyanate polyaddition products are thereafter prepared in situ.
Claim 4
Dependent Claim
25 words
The process of claim 2, wherein an aqueous polymer dispersion having a solids content of between 5% by weight and 55% by weight is used.
Claim 5
Dependent Claim
40 words
The process of claim 1, wherein the dispersion of a vinyl polymer or of a polycondensation product in the hydroxyl containing dispersing agent is first prepared in situ and the polyisocyanate polyaddition reaction thereafter proceeds in the presence of water.
Claim 6
Dependent Claim
34 words
The process of claim 1, wherein the polymer dispersed in a non-aqueous organic medium is added to the hydroxyl containing dispersing agent and thereafter the polyisocyanate polyaddition reaction proceeds after the addition of water.
Claim 7
Dependent Claim
156 words
In a process for the production of polyurethane resins in which polyisocyanates are reacted with compounds containing active-hydrogen atoms and other known additives and the active hydrogen containing compound is a stable dispersion of polyisocyanate polyaddition products in hydroxyl containing compounds as dispersing agents which are formed by the process which comprises reacting in situ 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia in 3. compounds having at least one hydroxyl group, wherein compounds (3) having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and wherein the components are reacted together in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water, the water being subsequently removed in known manner if desired the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or solution of an ionic polyurethane.
Claim 8
Dependent Claim
156 words
In a process for the production of polyurethane resins in which polyisocyanates are reacted with compounds containing active-hydrogen atoms and other known additives and the active hydrogen containing compound is a stable dispersion of polyisocyanate polyaddition products in hydroxyl containing compounds as dispersing agents which are formed by the process which comprises reacting in situ 1. organic polyisocyanates with 2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia in 3. compounds having at least one hydroxyl group, wherein compounds (3) having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and wherein the components are reacted together in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water, the water being subsequently removed in known manner if desired the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or solution of an ionic polyurethane.
Claim 9
Dependent Claim
36 words
The process of claim 6, wherein an aqueous polymer latex or the aqueous solution of an ionic polyurethane is added to the hydroxyl containing dispersing agent and the polyisocyanate polyaddition products are thereafter prepared in situ.
Claim 10
Dependent Claim
25 words
The process of claim 6, wherein an aqueous polymer dispersion having a solids content of between 5% by weight and 55% by weight is used.
Claim 11
Dependent Claim
40 words
The process of claim 6, wherein the dispersion of a vinyl polymer or of a polycondensation product in the hydroxyl containing dispersing agent is first prepared in situ and the polyisocyanate polyaddition reaction thereafter proceeds in the presence of water.
Claim 12
Dependent Claim
34 words
The process of claim 6, wherein the polymer dispersed in a non-aqueous organic medium is added to the hydroxyl containing dispersing agent and thereafter the polyisocyanate polyaddition reaction proceeds 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 |