KR20170010479A - Preparing method of filler endcapped highly with a good acid resisting and filler and packing column using same - Google Patents

Preparing method of filler endcapped highly with a good acid resisting and filler and packing column using same Download PDF

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KR20170010479A
KR20170010479A KR1020150102170A KR20150102170A KR20170010479A KR 20170010479 A KR20170010479 A KR 20170010479A KR 1020150102170 A KR1020150102170 A KR 1020150102170A KR 20150102170 A KR20150102170 A KR 20150102170A KR 20170010479 A KR20170010479 A KR 20170010479A
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organic
filler
group
silica gel
silanol
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KR1020150102170A
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Korean (ko)
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이수창
박형석
유정환
김경희
김영훈
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(주) 영진바이오크롬
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    • G01N30/48
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/281Sorbents specially adapted for preparative, analytical or investigative chromatography
    • B01J20/282Porous sorbents
    • B01J20/283Porous sorbents based on silica

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The present invention relates to a method for preparing hydrocarbon-based filler for HPLC, which carries out a high-degree of endcapping of the silanol groups on the surface of silica gel so that polar compounds may not be adsorbed thereto, and provides filler with improved durability under a condition in which a strongly acidic solvent is used. The present invention also relates to filler and a filled column obtained by the method. The method for preparing hydrocarbon-based silica gel filler comprises the steps of: a coupling step in which silica gel is allowed to react with a C2-C30 alkyl or aryl group-containing chlorosilane or alkoxysilane; and a first step in which the unreacted chloro or alkoxy groups after the coupling step are substituted with silanol groups.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for producing a high end capping filler having excellent acid resistance, a filler and a packing column prepared using the same,

The present invention relates to a method for producing end capping filler, a filler and a fill column manufactured using the same, and more particularly to a method for manufacturing an end capping filler excellent in acid resistance and a filler and a fill column manufactured using the method.

Reversed phase chromatography fillers, in which functional groups are hydrocarbon based, are mostly used as silica gel fillers for HPLC. However, these fillers irreversibly interact with ionic compounds, especially basic compounds, and when used under strong acidic conditions, the durability of the column is rapidly deteriorated There is a problem such as. In particular, the effects are more pronounced when they are used for analyzing or sorting compounds such as peptides, proteins and nucleic acid bases.

It is known that the irreversible interaction is caused by silanol groups remaining after the reaction and trace amounts of metal ions remaining in the silica gel matrix (see Non-Patent Documents 1 and 2). In recent years, the purity of the silica gel for chromatography has been considerably improved, so that the effect on the coordination compound produced by the metal ion of the silica gel is considerably reduced.

One of the most well-known general methods is to add an organic base such as pyridine and reflux in a toluene solvent to remove the residual silanol groups. Trimethylchlorosilane (hereinafter referred to as 'TMS') (see Non-Patent Documents 3 and 4).

In addition, a method of reacting in a gas phase (see Patent Document 1) and a method of reacting in a supercritical fluid (see Patent Document 2 ) Are known. It is also known that two different kinds of organic bases are used for the reaction and the endcapping is divided into two or more times (see Patent Document 3).

As described above, many end capping methods have been disclosed, but a lot of reaction reagents, especially silylation reagents (see Non-Patent Document 6), have been much more.

Further, after C18 is bonded to the silica gel, TMS and hexamethyldisilazane (hereinafter referred to as "HMDS") are added at the same time to perform secondary end capping, and then TMS is used for the tertiary end capping (see Patent Document 4 ), Or a method in which end-capping is carried out in a gas phase using cyclosiloxane or HMDS at a temperature of 250 ° C or higher (see Patent Document 5).

Although there are many HPLC fillers prepared with the endcapping process disclosed in this prior art, it is difficult to say that any of the methods completely endcapped the remaining silanol groups. End capping is performed by dimethylsilylation of the silanol groups on the silica gel surface using TMS, HMDS, and cyclosiloxanes crosslinked at high temperatures, which are used as endcapping reagents. However, in practice, end capping of all silanol groups takes into consideration the three- It is difficult to see.

[Non-Patent Document]

- Non-Patent Document 1: M. Vezel and C. Dewaele, Chromatographia, 18 (1984) 314.

- Non-Patent Document 2: K. Kimata, N.Tanaka and T. Arai, J. Chromatogr., 594 (1992) 87.

Non-Patent Document 3: C.H. Lochmueller, and D. B. Marshall, Analitica Chimica Acta, 142 (1982) 63.

Non-Patent Document 4: N. Nagae, Y. Hatano and D. Ishi, Chromatography, 14 (1993) 45R.

Non-Patent Document 5: Y.Sakai, D.Hamakawa and S.Ohta, the 2 nd Technoplaza Proceedings, BP2 (1995) 51.

- Non-Patent Document 6: K.Sakaki, Separation Sciences, '94 Proceedings, 21P (1994).

[Patent Literature]

- Patent Document 1: Japanese Patent Publication No. 2611545 (Feb. 27, 1997)

- Patent Document 2: Japanese Patent Publication No. 2818857 (Aug. 28, 1998)

- Patent Document 3: JP-A-2003-172733 (Jun. 2003)

- Patent Document 4: JP-A-2008-232802 (2008.10.02)

- Patent Document 5: JP-A-1992-212058 (1992.08.03)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a hydrocarbon-based filler for HPLC which is capable of highly endcapping a silanol group on the surface of a silica gel to prevent a polar compound from being adsorbed, A method for producing an improved filler, and a filler and a packed column manufactured using the same.

According to an aspect of the present invention, there is provided a method for producing a hydrocarbon-based silica gel filler, comprising the steps of: (1) mixing silica gel with chlorosilane or alkoxysilane containing an alkyl group or aryl group having 2 to 30 carbon atoms; and a first step of reacting an unreacted chloro group or an alkoxy group with a silanol group after the coupling step of reacting the compound with an alkoxysilane, do.

Also, in the coupling step, the unreacted silanol groups and the silanol groups remaining on the surface of the silica gel may be replaced with an organic hydrogenation silane, an organic hydrogenation siloxane, an organic chlorosilane, , A second step of reacting with an organic alkoxysiloxane, an organic chlorosiloxane, an organic alkoxysilane or an organic alkoxysiloxane to form a multi-stage silanol layer.

Also included is a third step of crosslinking the formed multistage silanol groups with organic chlorosiloxane, organic hydrogenation cyclosiloxane or organic cyclosiloxane having two crosslinking points to cover the silicon with silicon The method comprising the steps of:

Also, when the above reaction is carried out with an organic hydrogenation silane, an organic hydrogenation siloxane or an organic hydrogenation cyclosiloxane, an alkene having 1 to 30 carbon atoms is added to form a hydrocarbon functional group And a fourth step of introducing a further step.

And a fifth step of end capping the unreacted silanol group by adding an end capping reagent to the filler into which the hydrocarbon functional group is introduced.

In order to solve the above-mentioned other problems, the present invention provides a filler produced by the above method.

In order to solve the above-mentioned problem, the present invention provides a packing column filled with the filler.

According to the present invention, in the preparation of fillers for HPLC, a silane coupling reagent having a hydrocarbon-based functional group usable for an HPLC filler is reacted with a silica gel to bind a functional group, and then a silanol group And residual silanol groups on the surface of the silica gel are further treated with an organic hydrogenation silane, an organic hydrogenation siloxane, an organic chlorosilane, an organic chlorosiloxane, an organic alkoxysilane ) Or organic alkoxysiloxane to form a new multistage silanol layer followed by an organic chlorosiloxane with two crosslinking points, an organic hydrogenation cyclosiloxane or an organic cyclosiloxane ), Followed by coating with silicone An organic hydrogenation silane, an organic hydrogenation siloxane or an organic hydrogenation cyclosiloxane to further introduce hydrocarbon functional groups, followed by end-capping the remaining silanol groups, that is, The present invention can provide a method for producing a filler that is highly end-capped and does not adsorb a polar compound and is excellent in acid resistance, and a filler and a packed column manufactured using the method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method for producing a hydrocarbon-based silica gel filler, which comprises the steps of: coupling silica gel with chlorosilane or alkoxysilane containing an alkyl group having 2 to 30 carbon atoms or an aryl group; And a first step of replacing the unreacted chloro group or alkoxy group with a silanol group after the coupling step.

In the first step, preferably, the unreacted chloro group or alkoxy group is converted into a silanol group, and the subsequent steps are surely proceeded, whereby the hydrocarbon-based silica gel filler can be efficiently produced.

The organic silane coupling reagent which can be used in the first step is not particularly limited. For example, in the case of commonly used C18, octadecyldimethylchlorosilane, octadecylmethyldichlorosilane, But are not limited to, octadecyltrichlorosilane, octadecyltrimethoxysilane, octadecyltriethoxysilane, 1,3,5,7-tetraoctadecyl-1,3,5,7-tetra 1,3,5,7-tetramethylcyclotetrasiloxane and the like can be preferably used, and more preferably, Octadecyltrimethoxysilane may be used.

Similarly, in the case of C8, octyldimethylchlorosilane, octylmethyldichlorosilane, octyltrichlorosilane, octyltrimethoxysilane, octyltriethoxysilane, and the like may be used. And more preferably, octyltrichlorosilane or octyltrimethoxysilane can be used.

Similarly, in the case of C4, various silane agents in which the alkyl group is n-butyl can be preferably used, and more preferably n-butyltrichlorosilane or butyl Butyltrimethoxysilane may be used.

In addition, group wherein the alkyl group is an aryl, such as phenyl ethyl (phenylethyl) group (C 6 H 5 - (CH 2) 2 - group; 2-Phenyl) or phenyl-hexyl (phenylhexyl) group (C 6 H 5 - (CH 2) 6 6-phenyl) chlorosilane or alkoxysilane may be preferably used, and trichlorosilane or trimethoxysilane may be more preferably used.

Also, 3-cyanopropyldimethylchlorosilane, 3-cyanopropylmethylchlorosilane, 3-cyanopropyltrichlorosilane, and the like, each having a cyanopropyl group, Can be used, and preferably 3-cyanopropyltrichlorosilane can be used.

The organosilane coupling reagent may be a hydrocarbon compound having a double bond or a triple bond in addition to the above, and is not necessarily limited to the above compounds.

In the present invention, the unreacted silanol groups and the silanol groups remaining on the surface of the silica gel in the coupling process may be replaced with organic hydrogenation silanes, organic hydrogenation siloxanes, organic chlorosilanes (organic and a second step of forming a multistage silanol layer by reacting with chlorosilane, organic chlorosiloxane, organic alkoxysilane or organic alkoxysiloxane.

By forming a new multistage silanol layer according to the second process, the hydrocarbon-based silica gel filler can be efficiently produced by making silicon bridging and end capping more convenient.

The organic hydrogenation silane or organic hydrogenation siloxane having 8 or less carbon atoms is not particularly limited and preferably trichlorosilane, dichlorosilane, dichloromethylsilane, For example, dichloroethylsilane, trimethoxysilane, dimethoxysilane, dimethoxymethylsilane, dimethoxyethylsilane, triethoxysilane, diethoxysilane, diethoxysilane, diethoxymethylsilane, diethoxyethylsilane, or 1,1-dichloro-3,3-dimethylpropanedisiloxane may be used as the organic solvent. And more preferably dichloromethylsilane or dialkoxymethylsilane is used. There.

Also, it is not particularly limited as to the organic chlorosilane, organic chlorosiloxane, organic alkoxysilane or organic alkoxysiloxane having a carbon number of 8 or less, but it is preferably tetrachlorosilane (such as tetrachlorosilane, ethyltrichlorosilane, dimethyldichlorosilane, ethyltrichlorosilane, diethyldichlorosilane, 1,2-dichlorotetramethyldisilane, ), 1,3-dichloro-1,1,3,3-tetramethyldisiloxane, 1,5-dichloro-1,1,3, 1,5-dichloro-1,1,3,3,5,5-hexamethyltrisiloxane, tetramethoxysilane, trimethoxymethylsilane, dimethoxymethylsilane, Dimethoxydimethylsilane, tetra Tetraethoxysilane, triethoxymethylsilane or diethoxydimethylsilane can be used. More preferably, dimethyldichlorosilane or dimethoxydimethylsilane can be used.

Here, a compound having two or more chloro groups or alkoxy groups capable of reacting with a silanol group by a functional group and capable of converting unreacted functional groups into silanol groups after the reaction can be used more effectively.

The reaction of the silanol group remaining in the second step with the organic hydrogenated silane or the organic hydrogenated siloxane having a carbon number of 8 or less can be carried out in a liquid phase process involving a chloro group in the presence of a volatile benzene, dichloromethane, 10% by weight or less of a silicon compound solution dissolved in chloroform or the like is added in an amount of 0.001 to 0.2 part by weight per 1 part by weight of the carrier prepared in the first step and the mixture is heated in an inert gas atmosphere at a temperature of 50 to 200 占 폚 Stirring for 2 hours or more, and adding 0.001 to 0.1 part by weight of a base such as pyridine to react.

In the liquid phase method involving an alkoxy group, the reaction is carried out in the same manner as above, or without removing a base such as pyridine, while refluxing in an inert gas atmosphere while removing the alcohol. If the reaction does not proceed well, add a small amount of weak acid (such as acetic acid) or weak base (such as ammonium hydroxide). Each is filtered, washed with chloroform and tetrahydrofuran (THF), and an alcohol aqueous solution is added after the alcohol is replaced to convert the unreacted group to a silanol group. The organic chlorosilane, organic chlorosiloxane, organic alkoxysilane or organic alkoxysiloxane having 8 or less carbon atoms can also be reacted in the same manner as described above to convert an unreacted group into a silanol group.

The present invention relates to a third step of crosslinking the formed multistage silanol groups with an organic chlorosiloxane, an organic hydrogenation cyclosiloxane or an organic cyclosiloxane having two crosslinking points, . ≪ / RTI >

The silanol groups formed in multiple steps according to the third step may be crosslinked, that is, coated with silicon, to efficiently produce a highly end-capped hydrocarbon-based silica gel filler.

Examples of the organic hydrogenation cyclosiloxane or organic cyclosiloxane used in the silicon coating in the third step include 1,3,5-trimethyl trihydrogenation (1,3,5-trimethyl trihydrogenation) cyclotrisiloxane, 1,3,5,7-tetramethyl tetrahydrogenation cyclotetrasiloxane, 1,3,5,7,9-pentamethylpenta-hydrogenated cyclopentasiloxane ( Cyclosiloxane such as 1,3,5,7,9-pentamethyl pentahydrogenation cyclopentasiloxane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentanesiloxane, and the like. Can be preferably used, and tetramethyl tetrahydrogenation cyclotetrasiloxane (1,3,5,7-tetramethylcyclot etrasiloxane and hexamethylcyclotrisiloxane are particularly preferably used.

Examples of the organic chlorosiloxane include 1,3-dichloro-1,1,3,3-tetramethyldisiloxane, 1,5-dichloro-1,1,3,3-tetramethyldisiloxane, - 1,5-dichloro-1,1,3,3,5,5-hexamethyltrisiloxane or 1,1-dichloro-3,3-dichloro-1,1,3,3,5,5-hexamethyltrisiloxane. (1,1-dichloro-3,3-dimethylpropanedisiloxane) can be preferably used.

Also, organic chlorosilane can be used, and 1,2-dichlorotetramethylsilane, 1,3-dichlorohexamethyltrisilane, 1,4-dichlorohexamethyltrisilane, 1,4-dichlorooctamethyltetrasilane or 1,5-dichlorodecamethylpentasilane can be preferably used.

In the present invention, when an organic hydrogenation silane, an organic hydrogenation siloxane or an organic hydrogenation cyclosiloxane is reacted with an alkene having 1 to 30 carbon atoms, And a fourth step of further introducing a functional group.

According to the fourth step, an alkyl group is further introduced using an alkene having 1 to 30 carbon atoms, whereby a filler having a large number of functional groups can be efficiently produced.

In the second step and the third step, a method of bonding a functional group to a SiH group of a carrier reacted with an organic hydrogenation silane or an organic hydrogenation siloxane can be carried out by using a known method such as 1-butene (1 butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-octadecene, 1-isoalkenes such as 1-alkene and 4-methyl-1-heptene, such as 1-decene, Platinum or the like is added as a catalyst with 1-aromatic alkene such as 1-alkenylbenzene and reacted in dry toluene at 50 to 300 ° C for 2 hours or more in an inert gas atmosphere The hydrocarbon-based functional group can be newly introduced by the fourth step.

The palladium compound used as the catalyst is not particularly limited, but palladium (II) chloride, tetraammine palladium (II) chloride, palladium hydroxide (II) chloride, (II) (platinum chloride (II)), platinum tetrachloride (II), and platinum tetrachloride (II) are preferably used. ), Platinum hexachloride (IV), platinum hydroxide (II), and the like can be suitably used.

The carrier prepared in the fourth step is sufficiently washed with chloroform or THF after the filtration, and after the alcohol substitution, an alcohol aqueous solution is added to convert the whole into a silanol group, and vacuum drying can be performed at 105 ° C for 2 hours or more.

The present invention may include a fifth step of end-capping unreacted silanol groups by adding an end-capping reagent to the filler into which the hydrocarbon-based functional group is introduced.

According to the fifth step, a highly end-capped filler having excellent acid resistance can be efficiently produced. Specifically, a filler prepared according to the first to third steps, that is, a silicon-coated filler obtained by reacting an organic silane or an organic siloxane, or a filler prepared according to the first to fourth steps , That is, after the silicon coating, the filler having a hydrocarbon functional group introduced thereinto is end-capped with an end capping agent containing trimethylsilyl group to reduce the unreacted silanol group.

Since a small amount of silanol groups remaining in the carrier prepared according to the first step to the third step or the first step to the fourth step is formed in a multistage manner and the steric hindrance is small, End capping is possible. On the other hand, if the silanol groups are ideally formed in multiple stages in the second step, the process may proceed directly to the next step.

The carrier prepared in the fifth step is sufficiently washed with chloroform or THF after filtration, and can be vacuum-dried at 105 ° C for 2 hours or more in an inert gas atmosphere.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.

Claims (7)

In the method for producing a hydrocarbon-based silica gel filler,
A coupling process in which silica gel is reacted with chlorosilane or alkoxysilane containing an alkyl group or an aryl group having 2 to 30 carbon atoms and an unreacted chloro ) Group or an alkoxy group with a silanol group.
The method according to claim 1,
In the coupling step, unreacted silanol groups and silanol groups remaining on the surface of the silica gel are reacted with an organic hydrogenation silane, an organic hydrogenation siloxane, an organic chlorosilane, And a second step of forming a multi-stage silanol layer by reacting with an organic chlorosiloxane, an organic alkoxysilane or an organic alkoxysiloxane.
3. The method of claim 2,
And a third step of crosslinking the formed multistage silanol groups with an organic chlorosiloxane, an organic hydrogenation cyclosiloxane or an organic cyclosiloxane having two crosslinking points to cover the silicon ≪ / RTI >
The method of claim 3,
When an organic hydrogenation silane, an organic hydrogenation siloxane or an organic hydrogenation cyclosiloxane is reacted, an alkene having 1 to 30 carbon atoms is added to form a hydrocarbon functional group And a fourth step of introducing the compound.
5. The method of claim 4,
And a fifth step of end-capping the unreacted silanol group by adding an end capping reagent to the filler into which the hydrocarbon-based functional group is introduced.
A filler produced by the method of any one of claims 1 to 5. A packed column packed with the filler of claim 6.
KR1020150102170A 2015-07-20 2015-07-20 Preparing method of filler endcapped highly with a good acid resisting and filler and packing column using same KR20170010479A (en)

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