US3684758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of modified cationic emulsion polymers with cationic polyurethane
Assignee: Bayer AG
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Filing: 1970-10-21
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Granted: 1972-08-15
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Expires: 1990-10-21
Abstract
Abstract A process is provided for the production of stable aqueous polymer dispersions by subjecting vinyl monomers to radical emulsion polymerization in the presence of a stable aqueous dispersion of a high molecular weight cationic polyurethane which is gel-like in character.
Inventors
- 👤 Hans Ludwig Honig
- 👤 Carlhans Suling
- 👤 Dieter Dieterich
- 👤 Artur Reischl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:14
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/006; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
The process of claim 1 wherein the radical emulsion polymerization is carried out in the presence of an inorganic peroxide, an organic peroxide, an alkyl hydroperoxide, a dialkyl peroxide, a peroxy ester or mixtures thereof as catalysts.
Claim 2
Dependent Claim
30 words
The process of claim 2 wherein the catalysts are present in quantities of from 0.01 to about 5 percent by weight based on the total weight of the vinyl monomer.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the radical emulsion polymerization is carried out at a temperature of from about 0* to about 150*C.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the reaction mixture contains an emulsifier.
Claim 5
Dependent Claim
31 words
The process of claim 1 wherein the polyurethane is present in the form of an aqueous dispersion having a solids content of from about 5 to about 60 percent by weight.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the cationic polyurethane cross-linking agent is a trifunctional polyol or a polyisocyanate.
Claim 7
Dependent Claim
12 words
The stable aqueous polymer dispersion prepared by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |