US5053135A
Expired / Lapsed
US
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Composite polymers, their preparation and their use in liquid chromatography
Assignee: I B F
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Filing: 1990-05-11
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Granted: 1991-10-01
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Expires: 2010-05-11
Abstract
Abstract A homogeneous composite polymer containing, in an interpenetrated form, 20% to 80% by weight of silica and 80% to 20% by weight of a three-dimensional crosslinked acrylic, vinyl and/or allyl copolymer comprising, in a copolymerized form, 98% to 70% by weight of at least one monofunctional acrylic, vinyl or allyl monomer and 2 % to 30% by weight of a difunctional acrylic or allyl crosslinking monomer is useful in liquid chromatography.
Inventors
- 👤 Egisto Boschetti
- 👤 Pierre Girot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:47
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; B; B01; B01D; B01D15/00; B01D15/08; B01J; B01J20/00; B01J20/22; B01J20/26; C08F; C08F2/00; C08F2/44; Y; Y10; Y10S; Y10S524/00; Y10S524/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A process for separating components of a liquid mixture by liquid chromatography, wherein the liquid mixture is brought into contact with a homogeneous composite hydrophilic polymer containing, in an interpenetrated form, 20% to 80% by weight of silica and 80% to 20% by weight of a three-dimensional cross-linked vinyl copolymer formed by copolymerization, in an aqueous sodium silicate medium, of 98% to 70% by weight of at least one monofunctional vinyl monomer and 2% to 30% by weight of a difunctional vinyl crosslinking monomer selected from the class consisting of difunctional acrylic and allyl cross-linking monomers.
Claim 2
Dependent Claim
96 words
A process for separating components of a liquid mixture by liquid chromatography, wherein the liquid mixture is brought into contact with a homogeneous composite hydrophilic polymer containing, in an interpenetrated form, 20% to 80% by weight of silica and 80% to 20% by weight of a three-dimensional cross-linked vinyl copolymer formed by copolymerization, in an aqueous sodium silicate medium, of 98% to 70% by weight of at least one monofunctional vinyl monomer and 2% to 30% by weight of a difunctional vinyl crosslinking monomer selected from the class consisting of difunctional acrylic and allyl cross-linking monomers.
Claim 3
Dependent Claim
33 words
A liquid chromatographic process as defined in claim 1, wherein the hydrophylic polymer contains 20% to 50% by weight of silica and 50% to 80% by weight of the three-dimensional crosslinked vinyl copolymer.
Claim 4
Dependent Claim
51 words
A liquid chromatographic process as defined in claim 1, wherein in the three-dimensional crosslinked copolymer the mono-functional vinyl monomer is acrylamide, methacrylamide, N-(tris(hydroxymethyl)methyl)acrylamide, N-tris(hydroxymethyl)methyl)methacrylamide, methylolacrylamide, polyethylene glycol acrylate, N-acryloyl- or N-methacryloyl-2-amino-2-hydroxymethyl-1,3-propanediol, morpholinoethylacrylamide, diethylaminoethylacrylamide, diethylaminoethylmethacrylamide, triethylaminoethyl-acrylamide, trimethylaminopropylmethacrylamide, acrylic acid, methacrylic acid, 6-acrylamidohexanoic acid, acryloylglycine, acryloylalanine, acrylamidomethyl-propanesulphonic acid, acryloylphosphocholamine, acrolein, vinylpyrrolidone or allylamine.
Claim 5
Dependent Claim
28 words
A liquid chromatographic process as defined in claim 1, wherein in the three-dimensional crosslinked copolymer the crosslinking monomer is N,N'-diallyltartardiamide, N,N'-methylene-bisacrylamide, N,N'-hexamethylenebisacrylamide, N,N'-methylenebishydroxymethylacrylamide, glyoxalbisacrylamide, or polyethylene glycol diacrylate.
Claim 6
Dependent Claim
63 words
A liquid chromatographic process as defined in claim 1, wherein the said crosslinked vinyl copolymer comprises, in copolymerized form, 98% to 70% by weight of at least one monofunctional vinyl monomer selected from the class consisting of acrylic and allyl monomers and 2% to 30% by weight of a difunctional vinyl crosslinking monomer selected from the class consisting of difunctional acrylic crosslinking monomers.
Claim 7
Dependent Claim
21 words
A liquid chromatographic process as defined in claim 1, wherein the liquid mixture undergoing separation comprises a mixture of biological compounds.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |