US3948866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization with the aid of macromolecule having both a monomer soluble portion and suspension soluble portion
Assignee: Roehm GmbH Darmstadt
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Filing: 1971-02-18
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Granted: 1976-04-06
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Expires: 1991-02-18
Abstract
Abstract A process for the suspension polymerization of ethylenically unsaturated monomers -- particularly for the preparation of water-soluble polymers -- wherein a liquid monomer phase is polymerized while suspended in a liquid organic suspending medium in the presence of a macromolecular stabilizing or suspending agent having a macromolecular portion or portions solvated by the liquid monomer phase and another macromolecular portion or portions solvated by the liquid organic suspending medium. Water-soluble suspension polymers, preparable by this process, comprising quaternization products or salts of dialkylaminoalkyl esters or of dialkylaminoalkyl amides of acrylic acid or of methacrylic acid.
Inventors
- 👤 Horst Pennewiss
- 👤 Helmut Knoell
- 👤 Juergen Masanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:06
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
In a process for the polymerization of ethylenically unsaturated monomers in a liquid monomer phase suspended in a liquid organic suspending medium, in the presence of a free radical forming initiator and of a suspension stabilizer, the improvement wherein said suspension stabilizer is a graft copolymer or block copolymer formed between at least two different vinyl, vinylidene, or alkylene oxide monomers, said graft or block copolymer having at least one macromolecular portion which is solvated by said liquid monomer phase and at least one macromolecular portion which is solvated by said liquid organic suspending medium.
Claim 2
Dependent Claim
95 words
In a process for the polymerization of ethylenically unsaturated monomers in a liquid monomer phase suspended in a liquid organic suspending medium, in the presence of a free radical forming initiator and of a suspension stabilizer, the improvement wherein said suspension stabilizer is a graft copolymer or block copolymer formed between at least two different vinyl, vinylidene, or alkylene oxide monomers, said graft or block copolymer having at least one macromolecular portion which is solvated by said liquid monomer phase and at least one macromolecular portion which is solvated by said liquid organic suspending medium.
Claim 3
Dependent Claim
22 words
A process as in claim 1, wherein said liquid monomer phase is a monomer or monomer mixture liquid at the polymerization temperature.
Claim 4
Dependent Claim
60 words
A process as in claim 1 wherein said liquid monomer phase is a solution of (A) a monomer or monomer mixture insoluble or of only limited solubility in the liquid organic suspending medium at the polymerization temperature in (B) a liquid which is imiscible or is of only limited miscibility with the liquid organic suspending medium at the polymerization temperature.
Claim 5
Dependent Claim
21 words
A process as in claim 3 wherein said liquid monomer phase is an aqueous solution of a monomer or monomer mixture.
Claim 6
Dependent Claim
53 words
A process as in claim 1 wherein the sum of molecular weights of the macromolecular portions of said macromolecular suspension stabilizer solvated by the liquid monomer phase to the sum of the molecular weights of its macromolecular portions solvated by the liquid organic suspending medium is in the ratio of 10:1 to 1:10.
Claim 7
Dependent Claim
26 words
A process as in claim 1 wherein the density of the liquid organic suspending medium and the density of the monomer phase are substantially the same.
Claim 8
Dependent Claim
25 words
A process as in claim 1 wherein said liquid organic suspending medium is a mixture of an aliphatic or aromatic hydrocarbon and an aliphatic chlorohydrocarbon.
Claim 9
Dependent Claim
21 words
A process as in claim 7 wherein said liquid organic suspending medium is a mixture of an aliphatic hydrocarbon and perchloroethylene.
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |