Patent US3637535A successfully refreshed from Google Patents.
US3637535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion exchanger with sponge structure
Assignee: Bayer AG
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Filing: 1958-03-04
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Granted: 1972-01-25
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Expires: 1978-03-04
Abstract
Abstract 1. A process which comprises (a) dissolving a major amount of styrene and a minor amount of divinyl benzene in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent, said solvent being present in an amount sufficient to impart a spongelike porosity to the copolymer formed therein; (b) incorporating said solution into an excess of water to form a dispersion of droplets; and (c) copolymerizing said styrene and said divinyl benzene while suspended in said aqueous medium and in the presence of said inert organic liquid, the resulting copolymer being recovered in the form of opaque resin beads. 3. A method for producing anion-exchange resins which comprises haloalkylating and aminating the product formed in the process of claim 2.
Inventors
- 👤 Herbert Corte
- 👤 Alfred Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/286; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; B01J47/00; B01J47/018; C08F; C08F8/00; C08F8/30; C08F8/32; C08J2325/00; C08J2325/02; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
125 words
A PROCESS WHICH COMPRISES (A) DISSOLVING A MAJOR AMOUNT OF STYRENE AND A MINOR AMOUNT OF DIVINYL BENEZENE IN AN INERT ORGANIC LIQUID WHICH IS A SOLVENT FOR STYRENE BUT NOT FOR LINEAR POLYSTYRENE, SAID INERT ORGANIC LIQUID BEING SELECTED FROM THE GROUP CONSISTING OF AN INERT ALIPHATIC OXYGEN-CONTAINING SOLVENT AND AN INERT ALIPHATIC HYDROCARBON SOLVENT, SAID SOLVENT BEING PRESENT IN AN AMOUNT SUFFICIENT TO IMPART A SPONGELIKE POROSITY TO THE COPOLYMER FORMED THEREIN; (B) INCORPORATING SAID SOLUTION INTO AN EXCESS OF WATER TO FORM A DISPERSION OF DROPLETS; AND (C) COPOLYMERIZING SAID STYRENE AND SAID DIVINYL BENZENE WHILE SUSPENDED IN SAID AQUEOUS MEDIUM AND IN THE PRESENCE OF SAID INERT ORGANIC LIQUID, THE RESULTING COPOLYMER BEING RECOVERED IN THE FORM OF OPAQUE RESIN BEADS.
Claim 2
Dependent Claim
125 words
A PROCESS WHICH COMPRISES (A) DISSOLVING A MAJOR AMOUNT OF STYRENE AND A MINOR AMOUNT OF DIVINYL BENEZENE IN AN INERT ORGANIC LIQUID WHICH IS A SOLVENT FOR STYRENE BUT NOT FOR LINEAR POLYSTYRENE, SAID INERT ORGANIC LIQUID BEING SELECTED FROM THE GROUP CONSISTING OF AN INERT ALIPHATIC OXYGEN-CONTAINING SOLVENT AND AN INERT ALIPHATIC HYDROCARBON SOLVENT, SAID SOLVENT BEING PRESENT IN AN AMOUNT SUFFICIENT TO IMPART A SPONGELIKE POROSITY TO THE COPOLYMER FORMED THEREIN; (B) INCORPORATING SAID SOLUTION INTO AN EXCESS OF WATER TO FORM A DISPERSION OF DROPLETS; AND (C) COPOLYMERIZING SAID STYRENE AND SAID DIVINYL BENZENE WHILE SUSPENDED IN SAID AQUEOUS MEDIUM AND IN THE PRESENCE OF SAID INERT ORGANIC LIQUID, THE RESULTING COPOLYMER BEING RECOVERED IN THE FORM OF OPAQUE RESIN BEADS.
Claim 3
Dependent Claim
16 words
The spongelike bead copolymer of styrene and divinyl benzene prepared by the process of claim 1.
Claim 4
Dependent Claim
20 words
A METHOD FOR PRODUCING ANION-EXCHANGE RESINS WHICH COMPRISES HALOALKYLATING AND AMINATING THE PRODUCT FORMED IN THE PROCESS OF CLAIM 2.
Claim 5
Dependent Claim
14 words
An anion-exchange resin consisting of the product produced by the process of claim 3.
Claim 6
Dependent Claim
134 words
A process which comprises (a) dissolving a major amount of a monovinyl carbocyclic aromatic compound and a minor amount of a copolymerizable polyethylenically unsaturated monomer in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent and being present in an amount sufficient to impart a sponge-like porosity to the copolymer formed therein, (b) incorporating said solution into an excess of water to form a dispersion of droplets and (c) copolymerizing said monovinyl carbocyclic aromatic compound and said polyethylenically unsaturated monomer while suspended in said aqueous medium and in the presence of said organic liquid and recovering the resulting copolymer in the form of opaque resin beads.
Claim 7
Dependent Claim
134 words
A process which comprises (a) dissolving a major amount of a monovinyl carbocyclic aromatic compound and a minor amount of a copolymerizable polyethylenically unsaturated monomer in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent and being present in an amount sufficient to impart a sponge-like porosity to the copolymer formed therein, (b) incorporating said solution into an excess of water to form a dispersion of droplets and (c) copolymerizing said monovinyl carbocyclic aromatic compound and said polyethylenically unsaturated monomer while suspended in said aqueous medium and in the presence of said organic liquid and recovering the resulting copolymer in the form of opaque resin beads.
Claim 8
Dependent Claim
20 words
A method for producing anion-exchange resins which comprises haloalkylating and aminating the product produced by the process of claim 5.
Claim 9
Dependent Claim
10 words
The anion-exchange resin produced by the process of claim 6.
Claim 10
Dependent Claim
100 words
A process which comprises (a) dissolving a major amount of a monovinyl carbocyclic aromatic compound and a minor amount of a copolymerizable polyethylenically unsaturated monomer in an inert organic liquid selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent, said liquid being a solvent for styrene but not for linear polystyrene and being present in an amOunt sufficient to impart a spongelike porosity to the copolymer formed therein (b) copolymerizing said monovinyl carbocyclic aromatic compound and said polyethylenically unsaturated monomer in said organic liquid and recovering the copolymer as an opaque resin.
Claim 11
Dependent Claim
100 words
A process which comprises (a) dissolving a major amount of a monovinyl carbocyclic aromatic compound and a minor amount of a copolymerizable polyethylenically unsaturated monomer in an inert organic liquid selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent, said liquid being a solvent for styrene but not for linear polystyrene and being present in an amOunt sufficient to impart a spongelike porosity to the copolymer formed therein (b) copolymerizing said monovinyl carbocyclic aromatic compound and said polyethylenically unsaturated monomer in said organic liquid and recovering the copolymer as an opaque resin.
Claim 12
Dependent Claim
25 words
A process according to claim 8 wherein said polyethylenically unsaturated monomer is present in an amount of above 0.5 percent based on the total monomers.
Claim 13
Dependent Claim
30 words
A process according to claim 8 wherein said inert organic liquid is present in an amount of at least 20 percent by weight based on the weight of the monomers.
Claim 14
Dependent Claim
20 words
A method for producing anion-exchange resins which comprises haloalkylating and aminating the product produced by the process of claim 8.
Claim 15
Dependent Claim
20 words
A method for producing anion-exchange resins which comprises haloalkylating and aminating the product produced by the process of claim 9.
Claim 16
Dependent Claim
20 words
A method for producing anion-exchange resins which comprises haloalkylating and aminating the product produced by the process of claim 10.
Claim 17
Dependent Claim
14 words
The anion-exchange resin consisting of the product produced by the process of claim 11.
Claim 18
Dependent Claim
68 words
A process of producing cross-linked copolymers of sponge structure which comprises copolymerizing a monovinyl carbocyclic aromatic compound and a polyethylenically unsaturated monomer which is copolymerizable therewith in an inert aliphatic organic liquid which is a solvent for said monomers but not for linear polymers of monovinyl carbocyclic aromatic compounds, said organic liquid being employed in amounts of at least 20 percent based on the weight of said monomers.
Claim 19
Dependent Claim
68 words
A process of producing cross-linked copolymers of sponge structure which comprises copolymerizing a monovinyl carbocyclic aromatic compound and a polyethylenically unsaturated monomer which is copolymerizable therewith in an inert aliphatic organic liquid which is a solvent for said monomers but not for linear polymers of monovinyl carbocyclic aromatic compounds, said organic liquid being employed in amounts of at least 20 percent based on the weight of said monomers.
References Cited (Backward Citations)
US2591574A
Cited
US3147214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |