US5277978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric stabilizers for emulsion polymerization
Assignee: Henkel AG and Co KGaA
•
Filing: 1990-11-23
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Granted: 1994-01-11
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Expires: 2010-11-23
Abstract
Abstract The process of producing a stable polymer dispersion by aqueous emulsion polymerization of an ethylenically unsaturated monomer in the presence of a stabilizer selected from a polyester or polyamide containing a sulfate or sulfonate group.
Inventors
- 👤 Dieter Feustel
- 👤 Karl-Heinz Stritzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:46
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/26; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
89 words
The process of producing a stable polymer dispersion by aqueous emulsion polymerization of an ethylenically unsaturated monomer, comprising conducting said emulsion polymerization in the presence of a stabilizer selected from the group consisting of a difunctional polyester containing a sulfate or sulfonate group and a difunctional polyamide containing a sulfate or sulfonate group, said polyester and said polyamide having been obtained by condensation of a dicarboxylic acid, its anhydride or ester, with a diamine or a diol and having an average molecular weight of about 2,000 to about 100,000
Claim 2
Dependent Claim
89 words
The process of producing a stable polymer dispersion by aqueous emulsion polymerization of an ethylenically unsaturated monomer, comprising conducting said emulsion polymerization in the presence of a stabilizer selected from the group consisting of a difunctional polyester containing a sulfate or sulfonate group and a difunctional polyamide containing a sulfate or sulfonate group, said polyester and said polyamide having been obtained by condensation of a dicarboxylic acid, its anhydride or ester, with a diamine or a diol and having an average molecular weight of about 2,000 to about 100,000
Claim 3
Dependent Claim
5 words
The product of claim 1.
Claim 4
Dependent Claim
13 words
A process as in claim 1 wherein said stabilizer has a linear structure.
Claim 5
Dependent Claim
5 words
The product of claim 3.
Claim 6
Dependent Claim
31 words
A process as in claim 1 wherein from about 0.5 to about 10% by weight of said stabilizer, based on the weight of said monomer, is present during said emulsion polymerization.
Claim 7
Dependent Claim
5 words
The product of claim 5.
Claim 8
Dependent Claim
13 words
A process as in claim 1 wherein said diamine comprises a primary diamine.
Claim 9
Dependent Claim
5 words
The product of claim 7.
Claim 10
Dependent Claim
13 words
A process as in claim 1 wherein said diol comprises a polyether diol.
Claim 11
Dependent Claim
5 words
The product of claim 9.
Claim 12
Dependent Claim
19 words
A process as in claim 9 wherein said polyether diol contains from about 1 to about 50 alkoxy units.
Claim 13
Dependent Claim
5 words
The product of claim 11.
Claim 14
Dependent Claim
30 words
A process as in claim 1 wherein said diol is selected from the group consisting of a difunctional alcohol containing an aliphatic, alicyclic or aromatic radical, and a primary alcohol.
Claim 15
Dependent Claim
20 words
A process as in claim 1 wherein said stabilizer has an average molecular weight of about 4,000 to about 20,000.
Claim 16
Dependent Claim
18 words
A process as in claim 1 wherein said stabilizer has an acid value of less than about 50.
Claim 17
Dependent Claim
23 words
A process as in claim 1 wherein said monomer is selected from the group consisting of vinyl compounds, styrenes, acrylates and derivatives thereof.
Claim 18
Dependent Claim
5 words
The product of claim 16.
Claim 19
Dependent Claim
32 words
A process as in claim 1 wherein said emulsion polymerization is conducted in the presence of a conventional component selected from the group consisting of a catalyst, an accelerator, and a buffer.
Claim 20
Dependent Claim
52 words
A stable polymer dispersion containing from about 20 to about 65% by weight of a polymer prepared by the process of claim 1, about 0.1 to about 6.5% by weight of a stabilizer according to claim 1, and the balance water, all weights being based on the weight of said polymer dispersion.
Claim 21
Dependent Claim
24 words
A polymer dispersion as in claim 19 wherein the polymer particles have an average particle diameter of from about 0.05 to about 3 microns.
References Cited (Backward Citations)
DE2540468A1
Cited
US4540807A
Cited
US4525525A
Cited
DE3519678A1
Cited
EP0212184A1
Cited
EP0281838A2
Cited
US4859374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-10 | 1997-07-12 | 1998-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-10 | 2001-07-12 | 2002-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-10 | 2005-07-12 | 2006-01-11 | $7700.00 | Window Closed / Lapsed |