US4046750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionene modified small polymeric beads
Assignee: California Institute of Technology
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Filing: 1974-09-30
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Granted: 1977-09-06
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Expires: 1994-09-30
Abstract
Abstract Linear ionene polyquaternary cationic polymeric segments are bonded by means of the Menshutkin reaction (quaternization) to biocompatible, extremely small, porous particles containing halide or tertiary amine sites which are centers for attachment of the segments. The modified beads in the form of emulsions or suspensions offer a large, positively-charged surface area capable of irreversibly binding polyanions such as heparin, DNA, RNA or bile acids to remove them from solution or of reversibly binding monoanions such as penicillin, pesticides, sex attractants and the like for slow release from the suspension.
Inventors
- 👤 Alan Rembaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:33
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/51; A61K9/5107; A61K9/513; A61K9/5138; C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
A composition of matter comprising: small, synthetic, organic, polymeric spherical particles having a diameter from 100 A. to 100 microns which are the cross-linked, addition polymerization product of a mono-unsaturated, acrylic monomer substituted with ionene reactive chloro, bromo, iodo or tertiary amine sites with 0.1 to 30% by weight of a diene or triene capable of addition polymerization with the unsaturated group of the acrylic monomer and having covalently bonded to at least one of said sites linear, polyquaternary ionene segments having an average charge of at least one intrapolymeric quaternary nitrogen for an average of every twelve chain atoms such that the halogen content of the segments is from 1 meg to 30 meg per gram of particle to form a particle of the structure: ##STR9## where R 11 is methyl, R 9 and R 10 are divalent aliphatic, aromatic or heterocyclic groups containing at least 3 carbon atoms, or R 9 combined with R 11 form a cyclic group, W is chloro, bromo, or iodo and n is an integer.
Claim 2
Dependent Claim
172 words
A composition of matter comprising: small, synthetic, organic, polymeric spherical particles having a diameter from 100 A. to 100 microns which are the cross-linked, addition polymerization product of a mono-unsaturated, acrylic monomer substituted with ionene reactive chloro, bromo, iodo or tertiary amine sites with 0.1 to 30% by weight of a diene or triene capable of addition polymerization with the unsaturated group of the acrylic monomer and having covalently bonded to at least one of said sites linear, polyquaternary ionene segments having an average charge of at least one intrapolymeric quaternary nitrogen for an average of every twelve chain atoms such that the halogen content of the segments is from 1 meg to 30 meg per gram of particle to form a particle of the structure: ##STR9## where R 11 is methyl, R 9 and R 10 are divalent aliphatic, aromatic or heterocyclic groups containing at least 3 carbon atoms, or R 9 combined with R 11 form a cyclic group, W is chloro, bromo, or iodo and n is an integer.
Claim 3
Dependent Claim
18 words
A composition according to claim 1 in which the particle has a diameter form 500A. to 2 microns.
Claim 4
Dependent Claim
73 words
A composition according to claim 1 in which the acrylic monomer is present in an amount of from 2-30% by weight of the particle and is selected from compounds of the formula: ##STR10## where R 1 is hydrogen or lower alkyl of 1-8 carbon atoms, R 2 is alkylene of 1-12 carbon atoms and Z is chloro, bromo, iodo or ##STR11## where R 3 and R 4 are alkyl of 1-3 carbon atoms.
Claim 5
Dependent Claim
17 words
A composition according to claim 3 in which the acrylic monomer is selected from dimethylaminoethylmethacrylate and 2-bromoethylmethacrylate.
Claim 6
Dependent Claim
41 words
A composition according to claim 3 in which the particle contains up to 97% by weight of at least one compatible comonomer selected from lower alkyl methacrylate, acrylic acid, methacrylic acid, styrene, vinyl toluene, acrylamide, hydroxyalkyl acrylate, or amino alkyl acrylates.
Claim 7
Dependent Claim
67 words
A composition according to claim 5 in which the comonomer is selected from compounds of the formula: ##STR12## where R 5 is hydrogen or lower alkyl of 1-8 carbon atoms, R 6 is alkylene of 1-12 carbon atoms and Y is OH or ##STR13## where R 7 is hydrogen and R 8 is hydrogen, lower alkyl of 1-8 carbon atoms or lower alkoxy of 1-8 carbon atoms
Claim 8
Dependent Claim
17 words
A composition according to claim 6 in which the comonomer is selected from hydroxyethylmethacrylate, hydroxypropylmethacrylate and 2-aminoethylmethacrylate.
Claim 9
Dependent Claim
32 words
A composition according to claim 1 in which R 9 and R 10 are alkylene from 3 to 16 carbon atoms and said segments have a molecular weight from 1,500 to 60,000.
References Cited (Backward Citations)
US3043822A
Cited
US3054782A
Cited
US3644225A
Cited
US3689470A
Cited
US3808158A
Cited
US3857824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |