US5135649A
Expired / Lapsed
US
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Column packing material with both hydrophobic and hydrophilic groups and process for production thereof
Assignee: Shiseido Co Ltd
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Filing: 1990-09-25
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Granted: 1992-08-04
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Expires: 2010-09-25
Abstract
Abstract A column packing material comprising a porous support coated with a silicone polymer having an Si--R bond, wherein R is a hydrocarbon group having 1 to 18 carbon atoms, and an Si--R' bond, wherein R' is a hydrophilic group having one or more of polyoxyalkylene group or hydroxyl group at the terminal end, of which column packing material is produced by: modifying a porous support by bonding hydrocarbon groups to the porous support; eliminating a part of the hydrocarbon groups from the modified porous support; and modifying the porous support by bonding hydrophilic groups thereto.
Inventors
- 👤 Taketoshi Kanda
- 👤 Atsuo Sakamoto
- 👤 Tadao Ohta
- 👤 Yutaka Ohtsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/262; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28014; B01J20/28016; B01J20/28019; B01J20/28054; B01J20/28057; B01J20/28078; B01J20/2808; B01J20/281; B01J20/286; B01J20/30; B01J20/3092; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/321; B01J20/3212; B01J20/3231; B01J20/3234; B01J20/3242; B01J20/3268; B01J20/3272; B01J20/3289; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/58
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A column packing material comprising: (i) a silicone polymer having an Si--R bond, wherein R is a hydrocarbon group having 1 to 18 carbon atoms and an Si--R' group, wherein R' is a hydrophilic group having at least one group selected from the group consisting of polyoxyalkylene group and hydroxyl group at the terminal end thereof and; (ii) a porous support coated therewith.
Claim 2
Dependent Claim
63 words
A column packing material comprising: (i) a silicone polymer having an Si--R bond, wherein R is a hydrocarbon group having 1 to 18 carbon atoms and an Si--R' group, wherein R' is a hydrophilic group having at least one group selected from the group consisting of polyoxyalkylene group and hydroxyl group at the terminal end thereof and; (ii) a porous support coated therewith.
Claim 3
Dependent Claim
26 words
A column packing material as claimed in claim 1, wherein the porous support is one of a silica gel, alumina, glass bead, zeolite, hydroxyapatite, and graphite.
Claim 4
Dependent Claim
27 words
A column packing material as claimed in claim 1, wherein the porous support is a composite powder comprising a synthetic resin coated with a fine inorganic powder.
Claim 5
Dependent Claim
23 words
A column packing material as claimed in claim 1, wherein the porous support has an average particle size of 2 to 200 μm.
Claim 6
Dependent Claim
25 words
A column packing material as claimed in claim 1, wherein the porous support has a specific surface area of 200 to 800 m 2 /g.
Claim 7
Dependent Claim
23 words
A column packing material as claimed in claim 1, wherein the porous support has a pore size of 40 Å to 120 Å.
Claim 8
Dependent Claim
169 words
A column packing material as claimed in claim 1, wherein the silicone polymer is obtained from a silicone compound having the formula (I): (R.sup.1 HSiO).sub.a (R.sup.2 R.sup.3 SiO).sub.b (R.sup.4 R.sup.5 R.sup.6 SiO.sub.1/2).sub.c (I) wherein R 1 , R 2 and R 3 are each independently a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms which may be substituted with at least one halogen atom, with a proviso that R 1 , R 2 and R 3 cannot be hydrogen atoms at the same time; R 4 , R 5 and R 6 are each independently a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms which may be substituted with at least one halogen atom; a is an integer of 0 or one or more, b is an integer of 0 or one or more, and c is 0 or 2, with a proviso that, when c is 0, the sum of a and b is an integer of 3 or more.
Claim 9
Dependent Claim
53 words
A process for producing a column packing material comprising: modifying a porous support by bonding hydrocarbon groups to the porous support; eliminating a part of the hydrocarbon groups from the modified porous support; and modifying the porous support by bonding hydrophilic groups thereto, wherein the porous support is coated with a silicone polymer.
Claim 10
Dependent Claim
53 words
A process for producing a column packing material comprising: modifying a porous support by bonding hydrocarbon groups to the porous support; eliminating a part of the hydrocarbon groups from the modified porous support; and modifying the porous support by bonding hydrophilic groups thereto, wherein the porous support is coated with a silicone polymer.
Claim 11
Dependent Claim
36 words
A process as claimed in claim 8, wherein a treatment with a Lewis acid is carried out in the hydrocarbon group eliminating step to effect cleavage of Si-hydrocarbon bonds of said part of the hydrocarbon groups.
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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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |