Patent US3870663A successfully refreshed from Google Patents.
US3870663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous styrene polyfunctional methacrylate polymers
Assignee: Rohm and Haas Co
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Filing: 1974-02-27
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Granted: 1975-03-11
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Expires: 1994-02-27
Abstract
Abstract A porous copolymer resin containing a major amount of styrene, or other aromatic vinyl constituent, and cross-linked with a minor amount of an aliphatic polyfunctional methacrylate having at least three methacrylate groups such as trimethylolpropane trimethacrylate. The resin is prepared by suspension polymerization and is thereafter given a chloromethylation and aminolysis treatment to convert it into a strong base resin. Other methods of preparing the strong base resins not involving direct chloromethylation can also be used. The resin shows unusual physical stability and is particularly useful in stringent applications such as the recovery of uranium complexes from acidic leach liquors.
Inventors
- 👤 David H Clemens
- 👤 Herman C Hamann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/286; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
A PORUS, RESINOUS POLYMER CONSISTING ESSENTIALLY OF A POLYMERIZED MIXTURE OF FROM 60 PERCENT TO 99.9 PERCENT BY WEIGHT OF STYRENE AND FROM 0.1 PERCENT TO 40 PERCENT OF A METHACRYLATE MONOMER SELECTED FROM THE CLASS CONSISTING OF TRIMETHYLOPROPANE TRIMETHACRYLATE, PENTAERITHRITOL TRIMETHACRYLATE, PENTAREITHRITOL TETRAMETHACRYLATE, AND GLYCEROL TRIMETHACRYLATE OR MIXTURE OF SAID METHACRYLATE MONOMER WITH A MINOR AMOUNT OF DIVINYLBENZENE.
Claim 2
Dependent Claim
59 words
A PORUS, RESINOUS POLYMER CONSISTING ESSENTIALLY OF A POLYMERIZED MIXTURE OF FROM 60 PERCENT TO 99.9 PERCENT BY WEIGHT OF STYRENE AND FROM 0.1 PERCENT TO 40 PERCENT OF A METHACRYLATE MONOMER SELECTED FROM THE CLASS CONSISTING OF TRIMETHYLOPROPANE TRIMETHACRYLATE, PENTAERITHRITOL TRIMETHACRYLATE, PENTAREITHRITOL TETRAMETHACRYLATE, AND GLYCEROL TRIMETHACRYLATE OR MIXTURE OF SAID METHACRYLATE MONOMER WITH A MINOR AMOUNT OF DIVINYLBENZENE.
Claim 3
Dependent Claim
60 words
A porous, resinous polymer consisting essentially of a polymerized mixture of from 60 percent to 99.9 percent by weight of styrene and from 0.1 percent to 40 percent of a methacrylate monomer selected from the class consisting of trimethylolpropane trimethacrylate, pentaerithritol trimethacrylate, pentaerithritol tetramethacrylate, and glycerol trimethacrylate or a mixture of said methacrylate monomer with a minor amount of divinylbenzene.
Claim 4
Dependent Claim
60 words
A porous, resinous polymer consisting essentially of a polymerized mixture of from 60 percent to 99.9 percent by weight of styrene and from 0.1 percent to 40 percent of a methacrylate monomer selected from the class consisting of trimethylolpropane trimethacrylate, pentaerithritol trimethacrylate, pentaerithritol tetramethacrylate, and glycerol trimethacrylate or a mixture of said methacrylate monomer with a minor amount of divinylbenzene.
Claim 5
Dependent Claim
14 words
A polymer as claimed in claim 1 wherein the polymer has a gelular nature.
Claim 6
Dependent Claim
14 words
A polymer as claimed in claim 1 wherein the polymer has a macroreticular structure.
Claim 7
Dependent Claim
14 words
A polymer as claimed in claim 1 wherein the methacrylate monomer is trimethylolpropane trimethacrylate.
Claim 8
Dependent Claim
31 words
A polymer as claimed in claim 4 wherein the mixture contains about 90 percent to 99.5 percent styrene by weight and 0.5 percent to 10 percent by weight of trimethylolpropane trimethacrylate.
Claim 9
Dependent Claim
31 words
A polymer as claimed in claim 4 wherein the mixture contains 95 percent to 99 percent by weight of styrene and 1 percent to 5 percent by weight of trimethylolpropane trimethacrylate.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |