JP3976113B2 - Method for producing branched silicone oil for condensation and equilibration at room temperature - Google Patents

Method for producing branched silicone oil for condensation and equilibration at room temperature Download PDF

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JP3976113B2
JP3976113B2 JP33669599A JP33669599A JP3976113B2 JP 3976113 B2 JP3976113 B2 JP 3976113B2 JP 33669599 A JP33669599 A JP 33669599A JP 33669599 A JP33669599 A JP 33669599A JP 3976113 B2 JP3976113 B2 JP 3976113B2
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Prior art keywords
organopolysiloxane
chemical formula
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silicone oil
branched silicone
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JP2001151889A (en
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良隆 青木
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Shin Etsu Chemical Co Ltd
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Shin Etsu Chemical Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、分岐型シリコーンオイルの製造方法に関し、特に物性的に安定な分岐型シリコーンオイルを簡便に製造する方法に関する。
【0002】
【従来の技術】
分岐型シリコーンオイルは、優れた低温特性を有するのみならず、一分子中に3単位以上の末端官能基を持たせることができるので、従来からブレーキ油等の作動油、硬化型シリコーンのべースオイル等に利用されている(例えば、特公昭55−21781、同59−43515、同59−41394)。また近年では、シリコーン消泡剤の組成成分として使用することにより消泡持続性を大幅に向上させることも行われている(特開平5−271689)。
【0003】
従来、分岐型シリコーンオイルの製造方法としては、アルキルトリクロロシランの加水分解物とジアルキルポリシロキサンとを、平衡化触媒を用いて縮合させる方法(欧州特許第31532号公報)、RSiO1/2単位とSiO単位からなる水酸基を有するオルガノポリシロキサンと両末端にシラノール基を有するジオルガノポリシロキサンとを、縮合触媒や平衡化触媒で反応させる方法(同第217501号)、並びにジオルガノポリシロキサンとビニルモノマーあるいはビニル基を有するジオルガノポリシロキサンとを混合しラジカル開始触媒を用いて反応させる方法(同第273448号)などが知られている。
【0004】
しかしながら、これらの製造方法は、反応の性質上仕上がり粘度にばらつきが生じるので、オイルの特性が一定しないなどの欠点がある。また、アルキルトリメトキシシランあるいはそれらの加水分解縮合物をRSiO3/2単位源とし、ジアルキルポリシロキサンと平衡化反応を行う方法もあるが、この方法では未反応のアルコキシ基が残るためゲル化し易く、目的生成物を安定に得ることができないという欠点がある。また反応物に水素−ケイ素結合をもつものを使用する場合、触媒に塩基性触媒を用いて反応を行うと、水素ガスが発生するため、水素−ケイ素結合を有する分岐型シリコーンオイルの製造法は特に難しかった。
【0005】
【発明が解決しようとする課題】
本発明の目的は、アルコキシ基等の反応性基を含まないため安定な物性を有する分岐型シリコーンオイル、特に水素−ケイ素結合を有する分岐型シリコーンオイルを安易かつ安定に製造するための方法を提供することである。
【0006】
【課題を解決するための手段】
本発明の主題は、下記化学式1
【化1】

Figure 0003976113
下記化学式2
【化2】
Figure 0003976113
下記化学式3
【化3】
Figure 0003976113
及び下記化学式4
【化4】
Figure 0003976113
から成る群から選択される少なくとも1種の化学式で表される第1オルガノポリシロキサン並びに下記化学式5
【化5】
Figure 0003976113
で表される第2オルガノポリシロキサンを、第1オルガノポリシロキサン100重量部に対する第2オルガノポリシロキサンの重量割合が0.1〜100重量部となるように混合し、酸性触媒を添加し、室温でこのオルガノポリシロキサン混合物を主に縮合した後、残りの酸性触媒を添加し、室温で前記オルガノポリシロキサン混合物を平衡化させる分岐型シリコーンオイルの製造方法であって、前記酸性触媒の合計添加重量を、前記第1オルガノポリシロキサン及び前記第2オルガノポリシロキサン全体の0.5〜10質量%とする分岐型シリコーンオイルの製造方法(式中、R1、R2、R3、R4及びR5は、それぞれ同じか又は異なっていてもよく、炭素数1〜20の一価炭化水素基、mは3〜7、kは1〜7、1は0〜6、n及びpはそれぞれ0以上、qは1以上、iは1〜100、jは0〜100である。)である。
【0007】
更に前記iが2であり、前記jが0であってもよい。また、上記製造方法において、前記酸性触媒が、硫酸、塩酸、及び有機スルホン酸から成る群から選択される少なくとも1種の酸性触媒であって、前記縮合及び平衡化反応を室温において行った後、更に前記酸性触媒を中和する工程を含んでもよい。更に、前記第1オルガノポリシロキサンが前記化学式2及び前記化学式4から成る群から選択される少なくとも1種の化学式で表されるオルガノポリシロキサンを少なくとも0.1重量部含んでもよい。また本発明は、一官能性[RSiO1/2]/二官能性([RSiO2/2]及び[RHSiO2/2])/三官能性[RSiO3/2]=0.5〜15/70〜99/0.5〜15(ケイ素の原子比(%))の構造を有する分岐型シリコーンオイル(式中、Rは、それぞれ同じか又は異なっていてもよく、原料のオルガノポリシロキサンにより定まる基である。)を製造するための上記の製造方法である。
【0008】
【発明の実施の形態】
以下更に本発明を詳細に説明する。
上記化学式1〜4で代表されるオルガノポリシロキサンは工業的に製造されており商業的に入手可能であり、例えば、化学式1として信越化学工業(株)製Sx−4、化学式2として信越化学工業(株)製KF−9902、化学式3として信越化学工業(株)製KF−9701及び化学式4として信越化学工業(株)製KF−99等がある。
化学式5で表されるオルガノポリシロキサンは、例えば上記化学式4で表されるオルガノポリシロキサンを、パラジウム−カーボン触媒の存在下で、水と脱水素反応させる等の公知の方法によって製造することができる。
【0009】
詳細には、これら化学式1〜5におけるR、R、R、R、及びRは、それぞれ同じか又は異なっていてもよく、メチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ドデシル基、テトラデシル基、ヘキサデシル基、オクタデシル基などのアルキル基、シクロヘキシル基などのシクロアルキル基、ビニル基、アリル基などのアルケニル基、フェニル基、トリル基などのアリール基、またはこれらの基の炭素原子に結合している水素原子の一部または全部をハロゲン原子、シアノ基などで置換したクロロメチル基、3−クロロデロピル基、3,3,3−トリフルオロプロピル基、シアノエチル基などから選択される少なくとも一種の炭素数1〜20の非置換または置換の1価有機基であり、好ましくはこの1価有機基の90モル%以上がメチル基である。
【0010】
更に、n及びp+qはそれぞれ10〜1,000であることが好ましい。iは1〜100であるが、これは100より大きいものは粘度が高く、取り扱いが困難となるためであり、本発明では、特に、2〜10であることが望ましい。また、jは0〜100であるが、これは100よりも大きいと上記化学式5のR(0H)SiO−単位の含有量が相対的に低下し、配合量を増加させる必要が生じるので効率的でないためである。特には0〜10であることが好ましい。
【0011】
化学式5で表される第2オルガノポリシロキサンの配合量は、第1オルガノポリシロキサン100重量部に対して0.01〜100重量部、好ましくは0.5〜15重量部である。0.01重量部より少ないと得られる分岐型シリコーンオイルの低温特性や消泡特性が不十分なものとなり、100重量部より多いと微細なゲル状物質が副生するからである。
【0012】
最終的に得られる分岐型シリコーンオイルの構造を、一官能性[RSiO1/2]/二官能性([RSiO2/2]及び[RHSiO2/2])/三官能性[RSiO3/2]=0.5〜15/70〜99/0.5〜15(ケイ素の原子比(%)、また式中、Rは、それぞれ同じか又は異なっていてもよく、原料のオルガノポリシロキサンにより定まる基である。)となるように設定することが好ましい。このようにすることによって、低温特性及び消泡特性に優れた特性を示す分岐型オルガノポリシロキサンを得ることができる。この場合に得られる分岐型オルガノポリシロキサンの粘度としては、25℃で約10〜50,000mPa・Sである。
【0013】
本発明における反応には、酸性触媒の存在下で、室温において縮合及び平衡化反応を行う段階、並びに更に酸性触媒を中和する段階が含まれる。これらの酸性触媒は、主に水酸基の縮合反応及び付随する平衡化反応を行わせるものであるが、この酸性触媒としては、硫酸、塩酸等の無機酸、及び有機スルホン酸、カルボン酸等の有機酸等から成る群から選択される少なくとも1種の酸性触媒、好ましくは硫酸、塩酸及び有機スルホン酸、より好ましくは硫酸が用いられる。オルガノポリシロキサン全体に対するこの酸性触媒の添加重は0.5〜10重量%、好ましくは1〜7重量%である。
【0014】
触媒は、微細なゲル状物質が副生することを防ぐため、2回以上に分けて添加することが好ましい。すなわちシロキサンに対し、初めに少量の上記酸性触媒を添加し、室温で1〜5時間撹拌し、主に縮合反応を行わせた後に、残りの酸性触媒を添加し、室温で1〜10時間撹拌する方法である。この場合、初めに添加する酸性触媒の量は通常0.02〜2重量部、好ましくは0.05〜1重量部である。
【0015】
酸性触媒をすべて添加して1〜10時間撹拌した後、水を添加する。これはシロキサンの末端基にスルホニル基が結合しているため、これを水酸基に変換し、さらに縮合させるためである。この水の添加量は、酸性触媒に対して少なすぎても、多すぎても上記の反応が起こりにくくなるため、酸性触媒100重量部に対して20〜60重量部、好ましくは30〜50重量部である。水添加後さらに0.5〜3時間、室温で撹拌し、縮合反応を終了させる。廃酸を分離した後、残った酸性触媒の中和脱水を行う。中和剤はこの目的に合うものであれば特に限定されないが、炭酸ナトリウム、水酸化ナトリウム、炭酸水素ナトリウム、炭酸カリウム、水酸化カリウムなどが好ましい。又、この時、硫酸ナトリウムなどの脱水剤を加えることも、その後の濾過精製には場合により有効である。
【0016】
【発明の効果】
本発明によれば、末端基となり得る変換され難いアルコキシ基等が含まれていないので、安定な物性を有する分岐型シリコーンオイルを得ることができ、しかも簡便な方法である。また、塩基性触媒を用いた場合には得難い、水素−ケイ素結合を有する分岐型シリコーンオイルを得ることができる。
【0017】
【実施例】
以下実施例を挙げて本発明を詳細に例証するが、本発明をこれらに限定することを意図するものではない。尚、特に記載のない限り、「%」は「重量%」を意味する。
実施例1
オルガノポリシロキサンとして、1,1,1,3,5,7,7,7−オクタメチル−3,5−ジヒドロキシテトラシロキサン62.9g、オクタメチルシクロテトラシロキサン400g及び平均構造式が下記化学式6
【0018】
【化6】
Figure 0003976113
【0019】
で表されるメチルヒドロシロキサン38.7gを用いて、室温にて酸性触媒として97%硫酸(石津製薬株式会社製)を1.5g加え、2時間撹拌後、さらに97%硫酸13.5g加え、室温にて6時間撹拌した。その後、水7.5g加え、室温にて2時間撹絆後、廃酸を分離した後、炭酸水素ナトリウム15g、硫酸ナトリウム15g加え、さらに2時間撹拌した。PH試験紙で中性を確認した後、加圧濾過し、25℃における粘度が60mPa・Sの水素−ケイ素結合を有する分岐型シリコーンオイルを得た。これを29Si−NMRで構造解析したところ[(CHSiO1/2]/[(CHSiO2/2]/[CHHSiO2/2]/[CHSiO3/2]=6.4/79.0/8.8/5.8(モル%)の組成であった。
【0020】
実施例2
オルガノポリシロキサンとして、1,1,1,3,5,7,7,7−オクタメチル−3,5−ジヒドロキシテトラシロキサンを33.7g、及びオクタメチルシクロテトラシロキサン429.5gを用いた以外は実施例1と同様にして、25℃における粘度が200mPa・Sの水素一ケイ素結合を有する分岐型シリコーンオイルを得た。これを29Si−NMRで構造解析したところ[(CHSiO1/2]/[(CHSiO2/2]/[CHHSiO2/2]/[CHSiO3/2]=3.5/84.2/9.2/3.1(モル%)の組成であった。
【0021】
実施例3
オルガノポリシロキサンとして、1,1,1,3,5,7,7,7−オクタメチル3,5−ジヒドロキシテトラシロキサン33.7g、及びオクタメチルシクロテトラシロキサン470.5gを用いた以外は実施例1と同様にして、25℃における粘度が200mPa・Sの分岐型シリコーンオイルを得た。これを29Si−NMRで構造解析したところ[(CHSiO1/2]/[(CHSiO2/2]/[CHSiO3/2]=3.4/93.2/3.4(モル%)の組成であった。
【0022】
比較例1
オルガノポリシロキサンとして、1,1,1,3,5,7,7,7−オクタメチル3,5−ジヒドロキシテトラシロキサン62.9g、オクタメチルシクロテトラシロキサン400g及び平均構造式が上記化学式6のメチルヒドロシロキサン38.7gを用い、水酸化カリウム0.2gを混合して、150〜160℃で撹拌したところ、30分後にゲル化した。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a branched silicone oil, and particularly relates to a method for easily producing a branched silicone oil that is physically stable.
[0002]
[Prior art]
Branched silicone oils not only have excellent low-temperature properties, but also can have a terminal functional group of 3 units or more in one molecule, so that hydraulic oils such as brake oils and curable silicone base oils have been used in the past. (For example, Japanese Patent Publication Nos. 55-21817, 59-43515, 59-41394). In recent years, the defoaming sustainability has been greatly improved by using it as a composition component of a silicone antifoaming agent (Japanese Patent Laid-Open No. 5-271690).
[0003]
Conventionally, as a method for producing a branched silicone oil, a method of condensing a hydrolyzate of alkyltrichlorosilane and a dialkylpolysiloxane using an equilibration catalyst (European Patent No. 31532), R 3 SiO 1/2 A method in which an organopolysiloxane having a hydroxyl group consisting of a unit and SiO 2 unit and a diorganopolysiloxane having silanol groups at both ends are reacted with a condensation catalyst or an equilibration catalyst (No. 217501), and diorganopolysiloxane A method of mixing a vinyl monomer or a diorganopolysiloxane having a vinyl group and reacting them using a radical initiation catalyst (Japanese Patent No. 273448) is known.
[0004]
However, these production methods have disadvantages such that the finished viscosity varies due to the nature of the reaction, and the oil characteristics are not constant. In addition, there is a method in which alkyltrimethoxysilane or a hydrolysis condensate thereof is used as an RSiO 3/2 unit source and an equilibration reaction with a dialkylpolysiloxane is carried out. However, there is a drawback that the target product cannot be obtained stably. In addition, when a reaction product having a hydrogen-silicon bond is used, hydrogen gas is generated when the reaction is performed using a basic catalyst as the catalyst. Therefore, a method for producing a branched silicone oil having a hydrogen-silicon bond is as follows. It was particularly difficult.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a method for easily and stably producing a branched silicone oil having a stable physical property because it does not contain a reactive group such as an alkoxy group, particularly a branched silicone oil having a hydrogen-silicon bond. It is to be.
[0006]
[Means for Solving the Problems]
The subject of the present invention is the following chemical formula 1
[Chemical 1]
Figure 0003976113
The following chemical formula 2
[Chemical formula 2]
Figure 0003976113
The following chemical formula 3
[Chemical 3]
Figure 0003976113
And the following chemical formula 4
[Formula 4]
Figure 0003976113
A first organopolysiloxane represented by at least one chemical formula selected from the group consisting of:
[Chemical formula 5]
Figure 0003976113
Is mixed so that the weight ratio of the second organopolysiloxane to 100 parts by weight of the first organopolysiloxane is 0.1 to 100 parts by weight, an acid catalyst is added, and In the method for producing a branched silicone oil in which the organopolysiloxane mixture is mainly condensed and then the remaining acidic catalyst is added, and the organopolysiloxane mixture is equilibrated at room temperature. Is a method for producing a branched silicone oil in which the total amount of the first organopolysiloxane and the second organopolysiloxane is 0.5 to 10% by mass (wherein R1, R2, R3, R4 and R5 are the same) Or a monovalent hydrocarbon group having 1 to 20 carbon atoms, m is 3 to 7, k is 1 to 7, 1 is 0 to 6, n and Each 0 or more, q is 1 or more, i is 1 to 100, j is 0 to 100.).
[0007]
Further, i may be 2 and j may be 0. In the above production method, the acidic catalyst is at least one acidic catalyst selected from the group consisting of sulfuric acid, hydrochloric acid, and organic sulfonic acid, and after the condensation and equilibration reactions are performed at room temperature, Furthermore, a step of neutralizing the acidic catalyst may be included. Furthermore, the first organopolysiloxane may include at least 0.1 part by weight of an organopolysiloxane represented by at least one chemical formula selected from the group consisting of the chemical formula 2 and the chemical formula 4. The present invention also provides monofunctional [R 3 SiO 1/2 ] / bifunctional ([R 3 SiO 2/2 ] and [RHSiO 2/2 ]) / trifunctional [RSiO 3/2 ] = 0. Branched silicone oil having a structure of 5-15 / 70-99 / 0.5-15 (silicon atomic ratio (%)) (wherein R may be the same or different, This is the production method described above for producing a group determined by polysiloxane.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
The organopolysiloxanes represented by the above chemical formulas 1 to 4 are industrially produced and commercially available, for example, Sx-4 manufactured by Shin-Etsu Chemical Co., Ltd. as Chemical Formula 1, and Shin-Etsu Chemical Industry as Chemical Formula 2. KF-9902 manufactured by Shin-Etsu Chemical Co., Ltd., KF-9701 manufactured by Shin-Etsu Chemical Co., Ltd., and KF-99 manufactured by Shin-Etsu Chemical Co., Ltd. as Chemical Formula 4 are available.
The organopolysiloxane represented by Chemical Formula 5 can be produced, for example, by a known method such as dehydrogenation reaction of the organopolysiloxane represented by Chemical Formula 4 with water in the presence of a palladium-carbon catalyst. .
[0009]
Specifically, R 1 , R 2 , R 3 , R 4 , and R 5 in these chemical formulas 1 to 5 may be the same or different, and may be a methyl group, an ethyl group, a propyl group, a butyl group, or pentyl. Group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, dodecyl group, alkyl group such as tetradecyl group, hexadecyl group, octadecyl group, cycloalkyl group such as cyclohexyl group, alkenyl group such as vinyl group, allyl group , A phenyl group, a tolyl group and other aryl groups, or a chloromethyl group, a 3-chlorodelopyl group, 3 or a part of the hydrogen atoms bonded to carbon atoms of these groups substituted with a halogen atom, a cyano group, etc. , 3,3-trifluoropropyl group, cyanoethyl group, etc. Is a monovalent organic group substituted, preferably 90 mol% or more methyl groups of the monovalent organic group.
[0010]
Furthermore, n and p + q are each preferably 10 to 1,000. i is 1 to 100. This is because a viscosity larger than 100 is high in viscosity and difficult to handle. In the present invention, it is particularly preferably 2 to 10. Further, j is 0 to 100, but if this is larger than 100, the content of the R (0H) SiO- unit of the above chemical formula 5 is relatively lowered, and it is necessary to increase the blending amount. Because it is not. In particular, j is preferably 0-10.
[0011]
The compounding quantity of the 2nd organopolysiloxane represented by Chemical formula 5 is 0.01-100 weight part with respect to 100 weight part of 1st organopolysiloxane, Preferably it is 0.5-15 weight part. This is because if it is less than 0.01 part by weight, the low temperature characteristics and defoaming characteristics of the resulting branched silicone oil will be insufficient, and if it is more than 100 parts by weight, a fine gel-like substance will be produced as a by-product.
[0012]
The structure of the branched silicone oil finally obtained is expressed as monofunctional [R 3 SiO 1/2 ] / bifunctional ([R 2 SiO 2/2 ] and [RHSiO 2/2 ]) / trifunctional [ RSiO 3/2] = 0.5~15 / 70~99 / 0.5~15 ( silicon atomic ratio (%), also in the formula, R may be the same or different, the raw material of the organo It is preferable to set so that it is a group determined by polysiloxane. By doing in this way, the branched organopolysiloxane which shows the characteristic which was excellent in the low temperature characteristic and the defoaming characteristic can be obtained. The viscosity of the branched organopolysiloxane obtained in this case is about 10 to 50,000 mPa · S at 25 ° C.
[0013]
The reaction in the present invention includes a step of performing a condensation and equilibration reaction at room temperature in the presence of an acidic catalyst, and further a step of neutralizing the acidic catalyst. These acidic catalysts mainly perform hydroxyl group condensation reaction and accompanying equilibration reaction. As the acidic catalyst, inorganic acids such as sulfuric acid and hydrochloric acid, and organic acids such as organic sulfonic acid and carboxylic acid are used. At least one acidic catalyst selected from the group consisting of acids and the like, preferably sulfuric acid, hydrochloric acid and organic sulfonic acids, more preferably sulfuric acid is used. The addition weight of this acidic catalyst with respect to the whole organopolysiloxane is 0.5 to 10% by weight, preferably 1 to 7% by weight.
[0014]
The catalyst is preferably added in two or more portions in order to prevent the formation of a fine gel-like substance as a by-product. That is, a small amount of the above acidic catalyst is first added to the siloxane and stirred at room temperature for 1 to 5 hours. After mainly allowing the condensation reaction to occur, the remaining acidic catalyst is added and stirred at room temperature for 1 to 10 hours. It is a method to do. In this case, the amount of the acid catalyst added first is usually 0.02 to 2 parts by weight, preferably 0.05 to 1 part by weight.
[0015]
Add all acidic catalyst and stir for 1-10 hours, then add water. This is because the sulfonyl group is bonded to the terminal group of the siloxane, so that it is converted into a hydroxyl group and further condensed. If the amount of water added is too small or too large relative to the acidic catalyst, the above reaction hardly occurs, so 20 to 60 parts by weight, preferably 30 to 50 parts by weight with respect to 100 parts by weight of the acidic catalyst. Part. Stir at room temperature for a further 0.5-3 hours after the addition of water to complete the condensation reaction. After separating the spent acid, the remaining acidic catalyst is neutralized and dehydrated. The neutralizing agent is not particularly limited as long as it meets this purpose, but sodium carbonate, sodium hydroxide, sodium bicarbonate, potassium carbonate, potassium hydroxide and the like are preferable. At this time, addition of a dehydrating agent such as sodium sulfate is also effective in subsequent filtration purification.
[0016]
【The invention's effect】
According to the present invention, it is possible to obtain a branched silicone oil having stable physical properties because it does not contain an alkoxy group that cannot be easily converted and can be converted into a terminal group, and is a simple method. Further, it is possible to obtain a branched silicone oil having a hydrogen-silicon bond, which is difficult to obtain when a basic catalyst is used.
[0017]
【Example】
The following examples illustrate the invention in detail, but are not intended to limit the invention. Note that “%” means “% by weight” unless otherwise specified.
Example 1
As the organopolysiloxane, 1,1,1,3,5,7,7,7-octamethyl-3,5-dihydroxytetrasiloxane 62.9 g, octamethylcyclotetrasiloxane 400 g and an average structural formula of the following chemical formula 6
[0018]
[Chemical 6]
Figure 0003976113
[0019]
1.5 g of 97% sulfuric acid (Ishizu Pharmaceutical Co., Ltd.) was added as an acidic catalyst at room temperature using 38.7 g of methylhydrosiloxane represented by the formula: Stir at room temperature for 6 hours. Thereafter, 7.5 g of water was added, and after stirring for 2 hours at room temperature, the spent acid was separated. Then, 15 g of sodium hydrogen carbonate and 15 g of sodium sulfate were added, and the mixture was further stirred for 2 hours. After confirming neutrality with PH test paper, pressure filtration was performed to obtain a branched silicone oil having a hydrogen-silicon bond having a viscosity at 25 ° C. of 60 mPa · S. When this was analyzed by 29 Si-NMR, [(CH 3 ) 3 SiO 1/2 ] / [(CH 3 ) 2 SiO 2/2 ] / [CH 3 HSiO 2/2 ] / [CH 3 SiO 3 / 2 ] = 6.4 / 79.0 / 8.8 / 5.8 (mol%).
[0020]
Example 2
Except for using 31.7 g of 1,1,1,3,5,7,7,7-octamethyl-3,5-dihydroxytetrasiloxane and 429.5 g of octamethylcyclotetrasiloxane as the organopolysiloxane. In the same manner as in Example 1, a branched silicone oil having a hydrogen-silicon bond having a viscosity at 25 ° C. of 200 mPa · S was obtained. When this was analyzed by 29 Si-NMR, [(CH 3 ) 3 SiO 1/2 ] / [(CH 3 ) 2 SiO 2/2 ] / [CH 3 HSiO 2/2 ] / [CH 3 SiO 3 / 2 ] = 3.5 / 84.2 / 9.2 / 3.1 (mol%).
[0021]
Example 3
Example 1 with the exception that 33.7 g of 1,1,1,3,5,7,7,7-octamethyl 3,5-dihydroxytetrasiloxane and 470.5 g of octamethylcyclotetrasiloxane were used as the organopolysiloxane. In the same manner, a branched silicone oil having a viscosity of 200 mPa · S at 25 ° C. was obtained. When this was analyzed by 29 Si-NMR, [(CH 3 ) 3 SiO 1/2 ] / [(CH 3 ) 2 SiO 2/2 ] / [CH 3 SiO 3/2 ] = 3.4 / 93. The composition was 2 / 3.4 (mol%).
[0022]
Comparative Example 1
The organopolysiloxane includes 1,1,1,3,5,7,7,7-octamethyl 3,5-dihydroxytetrasiloxane 62.9 g, octamethylcyclotetrasiloxane 400 g, When 38.7 g of siloxane was used and 0.2 g of potassium hydroxide was mixed and stirred at 150 to 160 ° C., gelation occurred after 30 minutes.

Claims (5)

下記化学式1
Figure 0003976113
下記化学式2
Figure 0003976113
下記化学式3
Figure 0003976113
及び下記化学式4
Figure 0003976113
から成る群から選択される少なくとも1種の化学式で表される第1オルガノポリシロキサン並びに下記化学式5
Figure 0003976113
で表される第2オルガノポリシロキサンを、第1オルガノポリシロキサン100重量部に
対する第2オルガノポリシロキサンの重量割合が0.1〜100重量部となるように混合し、酸性触媒を添加し、室温でこのオルガノポリシロキサン混合物を主に縮合した後、残りの酸性触媒を添加し、室温で前記オルガノポリシロキサン混合物を平衡化させる分岐型シリコーンオイルの製造方法であって、前記酸性触媒の合計添加重量を、前記第1オルガノポリシロキサン及び前記第2オルガノポリシロキサン全体の0.5〜10質量%とする分岐型シリコーンオイルの製造方法(式中、R1、R2、R3、R4及びR5は、それぞれ同じか又は異なっていてもよく、炭素数1〜20の一価炭化水素基、mは3〜7、kは1〜7、1は0〜6、n及びpはそれぞれ0以上、qは1以上、iは1〜100、jは0〜100である。)。
The following chemical formula 1
Figure 0003976113
The following chemical formula 2
Figure 0003976113
The following chemical formula 3
Figure 0003976113
And the following chemical formula 4
Figure 0003976113
A first organopolysiloxane represented by at least one chemical formula selected from the group consisting of:
Figure 0003976113
Is mixed so that the weight ratio of the second organopolysiloxane to 100 parts by weight of the first organopolysiloxane is 0.1 to 100 parts by weight, an acid catalyst is added, and In the method for producing a branched silicone oil in which the organopolysiloxane mixture is mainly condensed and then the remaining acidic catalyst is added, and the organopolysiloxane mixture is equilibrated at room temperature. Is a method for producing a branched silicone oil in which the total amount of the first organopolysiloxane and the second organopolysiloxane is 0.5 to 10% by mass (wherein R1, R2, R3, R4 and R5 are the same) Or a monovalent hydrocarbon group having 1 to 20 carbon atoms, m is 3 to 7, k is 1 to 7, 1 is 0 to 6, n and Each 0 or more, q is 1 or more, i is 1 to 100, j is 0 to 100.).
前記iが2であり、前記jが0である請求項1に記載の製造方法。The manufacturing method according to claim 1, wherein i is 2 and j is 0. 前記酸性触媒が、硫酸、塩酸、及び有機スルホン酸から成る群から選択される少なくとも1種の酸性触媒であって、前記縮合及び平衡化反応を室温において行った後、更に前記酸性触媒を中和する工程を含む請求項1又は2に記載の製造方法。The acidic catalyst is at least one acidic catalyst selected from the group consisting of sulfuric acid, hydrochloric acid, and organic sulfonic acid, and after the condensation and equilibration reactions are performed at room temperature, the acidic catalyst is further neutralized. The manufacturing method of Claim 1 or 2 including the process to do. 前記第1オルガノポリシロキサンが前記化学式2及び前記化学式4から成る群から選択される少なくとも1種の化学式で表されるオルガノポリシロキサンを少なくとも0.1重量部含む請求項1〜3のいずれか一項に記載の製造方法。The said 1st organopolysiloxane contains at least 0.1 weight part of organopolysiloxane represented by the at least 1 sort (s) of chemical formula selected from the group which consists of the said Chemical formula 2 and the said Chemical formula 4. The production method according to item. 一官能性[RSiO1/2]/二官能性([RSiO2/2]及び[RHSiO2/2])/三官能性[RSiO3/2]=0.5〜15/70〜99/0.5〜15(ケイ素の原子比(%))の構造を有する分岐型シリコーンオイル(式中、Rは、それぞれ同じか又は異なっていてもよく、原料のオルガノポリシロキサンにより定まる基である。)を製造するための請求項1〜4のいずれか一項に記載の製造方法。Monofunctional [R 3 SiO 1/2 ] / bifunctional ([R 2 SiO 2/2 ] and [RHSiO 2/2 ]) / trifunctional [RSiO 3/2 ] = 0.5 to 15/70 Branched silicone oil having a structure of ˜99 / 0.5 to 15 (atomic ratio (%) of silicon) (wherein R may be the same or different, and is determined by the starting organopolysiloxane) The manufacturing method as described in any one of Claims 1-4 for manufacturing.
JP33669599A 1999-11-26 1999-11-26 Method for producing branched silicone oil for condensation and equilibration at room temperature Expired - Fee Related JP3976113B2 (en)

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WO2014050751A1 (en) 2012-09-27 2014-04-03 富士フイルム株式会社 Image formation method
EP3050930A1 (en) 2015-01-29 2016-08-03 Fujifilm Corporation Ink set and image forming method

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DE102005018629A1 (en) 2005-04-21 2006-10-26 Wacker Chemie Ag Process for the preparation of triorganosiloxy-containing organopolysiloxanes
DE102005018628A1 (en) 2005-04-21 2006-10-26 Wacker Chemie Ag Process for the preparation of silanol-containing organopolysiloxanes
US20220340713A1 (en) 2019-09-03 2022-10-27 Dow Silicones Corporation Method for producing organopolysiloxane

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WO2014050751A1 (en) 2012-09-27 2014-04-03 富士フイルム株式会社 Image formation method
EP3050930A1 (en) 2015-01-29 2016-08-03 Fujifilm Corporation Ink set and image forming method

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