US4933372A
Expired / Lapsed
US
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Porous rigid resins and process of preparation
Assignee: Sigma-Aldrich Co LLC
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Filing: 1989-11-07
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Granted: 1990-06-12
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Expires: 2009-11-07
Abstract
Abstract Porous, rigid resin particles are prepared having a predetermined particle size distribution, surface area and porosity by polymerizing in the pores of porous inorganic template particles a reaction mixture comprising monovinyl monomers, polyvinyl crosslinking monomers and a polymerization initiator in a liquid medium in which the monomers and initiator are phase separable and extractable therefrom into the pores of the template particles. The extracted mixture is polymerized in the pores of the template particles, and the template particles are removed without destruction of the polymerizate. The isolated polymerizate mirrors the characteristics of the template particles. The surface of the polymerizate may be modified in various ways to contain desired functionality. The particles of the invention are useful in chromatography, adsorption, ion exchange, and in catalysis.
Inventors
- 👤 Binyamin Feibush
- 👤 Nai-Hong Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; B01J20/00; B01J20/22; B01J20/26; B01J20/28; B01J20/28014; B01J20/28026; B01J20/2803; B01J20/28054; B01J20/28057; B01J20/28069; B01J20/28078; B01J20/28095; B01J20/28097; B01J31/00; B01J31/02; B01J31/06; B01J31/063; B01J31/067; B01J31/08; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; C; C08; C08J; C08J9/00; C08J9/26; C08J2201/00; C08J2201/04; C08J2201/044; C08J2201/0442; C08J2325/00; C08J2325/02; C08J2325/04; C08J2333/00; C08J2333/04; C08J2333/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
93 words
A porous, rigid resin comprising particles of crosslinked copolymer derived from monoethylenically unsaturated monomers and polyethylenically unsaturated crosslinking monomers, said copolymer resulting from polymerization, in the pores of porous inorganic template particles, of a reaction mixture comprising said monomers and a polymerization initiator in a liquid medium in which the monomers and initiator are phase separable and extractable therefrom into the pores of the template particles, followed by removal of the template particles without destruction of the copolymer, whereby the isolated copolymer mirrors the size, surface area and porosity of the template particles.
Claim 2
Dependent Claim
93 words
A porous, rigid resin comprising particles of crosslinked copolymer derived from monoethylenically unsaturated monomers and polyethylenically unsaturated crosslinking monomers, said copolymer resulting from polymerization, in the pores of porous inorganic template particles, of a reaction mixture comprising said monomers and a polymerization initiator in a liquid medium in which the monomers and initiator are phase separable and extractable therefrom into the pores of the template particles, followed by removal of the template particles without destruction of the copolymer, whereby the isolated copolymer mirrors the size, surface area and porosity of the template particles.
Claim 3
Dependent Claim
24 words
The resin of claim 1 wherein the template particles are selected from a porous silica gel, alumina, zirconia, a mineral, and a refractory material.
Claim 4
Dependent Claim
24 words
The resin of claim 1 wherein the monomers, the initiator and the template particles are hydrophobic, and the reaction mixture comprises an aqueous medium.
Claim 5
Dependent Claim
25 words
The resin of claim 1 wherein the monomers, the initiator and the template particles are hydrophilic, and the reaction mixture comprises a hydrophobic suspending medium.
Claim 6
Dependent Claim
20 words
The resin of claim 3 wherein the template particles comprise silanized silica gel particles and the reaction medium is aqueous.
Claim 7
Dependent Claim
19 words
The resin of claim 5 wherein the silanization is effected with a trialkyl (C 1 -C 18 ) halosilane.
Claim 8
Dependent Claim
40 words
The resin of claim 5 wherein the silica gel has an average pore size from about 3 to about 2000 nm, a porosity of at least 30% and a surface area from about 5 to about 1000 m 2 /g.
Claim 9
Dependent Claim
11 words
The resin of claim 1 wherein the copolymer carries polar functionality.
Claim 10
Dependent Claim
12 words
The resin of claim 8 where in the polar functionality is cationic.
Claim 11
Dependent Claim
13 words
The templated resin of claim 9 wherein the cationic functionality comprises pyridinyl groups.
Claim 12
Dependent Claim
11 words
The resin of claim 8 wherein the polar functionality is anionic.
Claim 13
Dependent Claim
24 words
The resin of claim 1 wherein the monoethylenically unsaturated monomers are selected from aromatic monomers, acrylic monomers, or mixtures of aromatic and acrylic monomers.
Claim 14
Dependent Claim
12 words
The resin of claim 1 wherein the copolymer is a styrenic copolymer.
Claim 15
Dependent Claim
16 words
The resin of claim 1 wherein the styrenic copolymer is a copolymer of styrene and divinylbenzene.
Claim 16
Dependent Claim
12 words
The resin of claim 1 wherein the copolymer is an acrylic copolymer.
Claim 17
Dependent Claim
24 words
The resin of claim 1 wherein the acrylic copolymer is copolymer of divinylbenzene and an alkyl (C 1 -C 8 ) acrylate of methacrylate.
References Cited (Backward Citations)
US1113630A
Cited
US3007896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |