JP3804759B2 - Water repellent gravel and method for producing the same - Google Patents

Water repellent gravel and method for producing the same Download PDF

Info

Publication number
JP3804759B2
JP3804759B2 JP2001044579A JP2001044579A JP3804759B2 JP 3804759 B2 JP3804759 B2 JP 3804759B2 JP 2001044579 A JP2001044579 A JP 2001044579A JP 2001044579 A JP2001044579 A JP 2001044579A JP 3804759 B2 JP3804759 B2 JP 3804759B2
Authority
JP
Japan
Prior art keywords
gravel
weight
sio
water
repellent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001044579A
Other languages
Japanese (ja)
Other versions
JP2002241743A (en
Inventor
芳人 大沢
憲一 磯部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Priority to JP2001044579A priority Critical patent/JP3804759B2/en
Publication of JP2002241743A publication Critical patent/JP2002241743A/en
Application granted granted Critical
Publication of JP3804759B2 publication Critical patent/JP3804759B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
  • Paints Or Removers (AREA)
  • Silicon Polymers (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、撥水砂利及びその製造方法に関する。更に詳しくは、道路、鉄道線路、駐車場、化学プラント、公園、庭園、病院、工場、学校、遊園地、墓地等の砂利に利用した場合、撥水性が付与されているため、水はけがよくなる撥水砂利及びその製造方法に関する。
【0002】
【従来の技術】
従来より、道路、鉄道線路、駐車場、化学プラント、公園、庭園、病院、工場、学校、遊園地、墓地等に砂利が敷かれている場合が多いが、水はけをよくするためにも撥水性を付与することが望まれている。そこで、従来より土や砂などを撥水性にする方法として、シリコーンエマルジョンで土壌を撥水処理する方法(特開平6−206755号公報、特開平7−279176号公報、特開平9−67571号公報、特開平9−255403号公報、特開平11−269463号公報)、Si−H結合含有オルガノポリシロキサンで土壌表面を処理する方法(特開平1−319585号公報、特開平10−279346号公報)、撥水性物質で土壌を処理する方法(特開平5−192033号公報)、シリコーン処理した撥水砂を利用する方法(特開平6−62660号公報、特開平6−101224号公報、特開平6−113673号公報)、クロロシランで無機質材料を処理する方法(特開平7−48559号公報)、Si−H結合含有オルガノポリシロキサンと硬化触媒のエマルジョンを芝生面に散布する方法(特開平9−157117号公報)、アルキド樹脂とシリコーン撥水剤をコーティングする方法(特開2000−23559号公報)などが提案されている。
【0003】
しかしながら、従来の方法では効果が弱かったり、持続性が弱いといった欠点があった。
【0004】
【発明が解決しようとする課題】
本発明は、上記事情に鑑みなされたもので、撥水性が良好であり、かつその持続性に優れた撥水砂利及びその製造方法を提供することを目的とする。
【0005】
【課題を解決するための手段及び発明の実施の形態】
本発明者らは、上記目的を達成するため鋭意検討を重ねた結果、Si−H結合含有オルガノポリシロキサンと白金触媒とを含有した組成物を砂利に塗布、熱処理することが、撥水性及びその持続性の点から有効であることを見出した。
【0006】
即ち、従来のシリコーン処理剤としては、Si−H結合含有オルガノポリシロキサン単独で熱処理したり、硬化触媒としてスズ化合物、亜鉛化合物、鉄化合物などの縮合触媒を併用するものであり、硬化触媒として白金化合物を用いた方法はなかったが、本発明者らは、(A)下記一般式で表される1分子中にSi−H結合を少なくとも3個含有するオルガノポリシロキサン及び(B)白金触媒を主成分としてなる組成物、好ましくは、更に(C)反応制御剤を含有した組成物を砂利に付着させ、熱処理することにより、撥水性が良好であり、かつその持続性に優れた撥水砂利が得られることを知見し、本発明をなすに至ったものである。
【0007】
従って、本発明は、
(A)下記一般式で表される1分子中にSi−H結合を少なくとも3個含有するオルガノポリシロキサン 100重量部
[SiO2p[RSiO3/2q[R2SiO]r[R3SiO1/2s
(式中、Rは水素原子又は炭素数1〜20の脂肪族不飽和結合を含有しない非置換若しくは置換の1価炭化水素基、p、q、sはそれぞれ0以上の整数、rは3以上の整数である。)
(B)白金触媒 0.0001〜10重量部
(C)必要により反応制御剤 0.01〜10重量部
を含有してなる組成物を砂利に付着させて加熱処理してなることを特徴とする撥水砂利、及びその製造方法を提供する。
【0008】
以下、本発明につき更に詳しく説明する。
本発明の撥水砂利の撥水成分となる組成物は、(A)上記一般式で表される1分子中にSi−H結合を少なくとも3個含有するオルガノポリシロキサン及び(B)白金触媒、又はこれらと(C)反応制御剤とを主成分としてなるものである。
【0009】
本発明の組成物に用いられる(A)成分のオルガノポリシロキサンは、下記一般式で表される1分子中にSi−H結合を少なくとも3個含有するものである。
[SiO2p[RSiO3/2q[R2SiO]r[R3SiO1/2s
【0010】
上記式中、Rは水素原子又は炭素数1〜20、好ましくは1〜12の脂肪族不飽和結合を含有しない非置換若しくは置換の1価炭化水素基であり、このようなRとしては、例えば水素原子、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、へプチル基、オクチル基、デシル基、テトラデシル基、オクタデシル基等のアルキル基、シクロヘキシル基等のシクロアルキル基、フェニル基、トリル基、ナフチル基等のアリール基、又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又は全部をヒドロキシ基、シアノ基、ハロゲン原子などで置換したヒドロキシプロピル基、シアノエチル基、1−クロロプロピル基、3,3,3−トリフルオロプロピル基などから選択されるものが例示されるが、好ましくはメチル基である。また、Rは互いに同一でも異なっていてもよいが、Rの少なくとも3個は水素原子である。
【0011】
また、p、q、sはそれぞれ0以上の整数、rは3以上の整数であり、好ましくは、pは0〜5、qは0〜10、sは0〜50、rは3〜1,000の整数、更に好ましくは、pは0〜2、qは0〜5、sは0〜10、rは3〜500の整数である。
【0012】
本発明の組成物において、基材に対する密着性は、ケイ素原子に結合した水素原子によって発現していると考えられるため、上記オルガノポリシロキサンは、水素原子が直結しているケイ素原子の割合が全体の50重量%以上であることが好ましく、特に70重量%以上であることが好ましい。なお、水素原子が直結しているケイ素原子の割合は100重量%であってもよい。
【0013】
このオルガノポリシロキサンの分子構造については、特に制限はなく、鎖状、分岐状、環状のいずれであってもよいが、作業性の観点から25℃における粘度が5〜50,000cP、より好ましくは5〜5,000cPであることが望ましい。
【0014】
このようなオルガノポリシロキサンの具体例としては、下記のものを挙げることができる。
【化1】

Figure 0003804759
(式中、rは上記と同じ。但し、bは3以上の整数である。)
【0015】
上記オルガノポリシロキサンは、公知の方法によって合成することができる。例えば硫酸のような触媒の存在下に、Si−H結合含有環状シロキサンとオクタメチルシクロテトラシロキサン等の環状シロキサン、ヘキサメチルジシロキサン、1,1,3,3−テトラメチルジシロキサンなどを平衡化反応させることにより得られる。また、メチルジクロロシラン、トリメチルクロロシラン、ジメチルクロロシラン等の共加水分解縮合反応による従来公知の方法により合成することもできる。
【0016】
次に、(B)成分である白金触媒は、(A)成分のSi−H結合含有オルガノポリシロキサンを架橋硬化させるために配合するものであり、従来より公知の白金化合物を使用することができるが、具体的には、例えば塩化白金酸、アルコール変性塩化白金酸、塩化白金酸−ビニルシロキサン錯体等が挙げられる。これら白金化合物の中でも、ビニルシロキサンと白金化合物との錯体、これを更にアルコール変性したものが好ましく、特に特公昭33−9969号公報に記載された塩化白金酸、又はビニルシロキサンと塩化白金酸との錯体が好ましい。
【0017】
(B)成分の配合量は、(A)成分100重量部に対して0.0001〜10重量部であり、0.0001重量部未満では架橋触媒効果がなく、10重量部を超えても利点はなく、不経済となる。好ましくは0.005〜1重量部である。
【0018】
また、この(A)成分と(B)成分とは、混合と同時に脱水素による架橋反応が進行してしまうため、(C)成分として反応を抑制する反応制御剤を添加することが望ましい。このような反応制御剤としては、アセチレン系アルコールや特公昭44−31476号公報、特公平1−12786号公報に記載されたアセチレン系化合物などが挙げられる。
【0019】
(C)成分の配合量は、(A)成分100重量部に対して0.01〜10重量部、好ましくは0.03〜1重量部であることが望ましい。配合量が0.01重量部未満であると反応制御効果が弱くなる場合があり、また、10重量部より多いと反応制御効果が強すぎて架橋反応が進行しない場合がある。
【0020】
また、本発明の組成物には、上記した成分の他に、本発明の効果を損なわない範囲で従来公知の各種の添加剤を任意成分として配合することができる。
【0021】
本発明の組成物は、上記成分、及び必要に応じて任意成分である添加剤を加えて、公知の方法により混合することで製造することができる。
【0022】
本発明の撥水砂利は、上記組成物を砂利に付着させ、加熱処理してなるものである。ここで、本発明に使用する砂利としては、特に制限されるものではなく、通常用いられている砂利を用いることができる。
【0023】
この砂利の大きさは、表面への均一皮膜形成性の面から直径が1〜15mm、特に2〜10mmのものが好ましい。
【0024】
本発明の撥水砂利の製造方法は、上記組成物を直接又は溶剤で希釈するか、若しくはエマルジョン状態として砂利に塗布又は添加混合後、砂利表面に架橋皮膜を形成させるために50〜250℃で加熱処理する。
【0025】
この際、使用する溶剤に特に制限はないが、Si−H結合含有オルガノポリシロキサンを溶解するものであればよい。また、エマルジョン化する際の乳化剤においても特に制限はなく、例えば非イオン性界面活性剤、アニオン性界面活性剤、カチオン性界面活性剤、両性界面活性剤などを使用することができる。
【0026】
上記組成物の処理量は、砂利に対して0.1〜20重量%、特に0.5〜10重量%であることが好ましい。処理量が0.1重量%より少ないと撥水効果が乏しくなる場合があり、20重量%より多くしてもそれ以上の撥水効果は得られず、不経済となる。
【0027】
本発明の撥水砂利の製造方法における加熱処理温度は、50℃未満では反応に時間がかかりすぎるため、非実用的であり、250℃より高い場合にはシリコーンの分解が起こる可能性があるため、50〜250℃である必要がある。好ましくは70〜200℃である。なお、加熱処理時間は、特に制限されるものではないが、通常15〜150分である。
【0028】
このようにして得られた撥水砂利は、耐久性のある撥水性が付与されているため、道路、鉄道線路、駐車場、化学プラント、公園、庭園、病院、工場、学校、遊園地、墓地等の砂利に利用した場合、水はけが良好であり、またその効果が持続するといった優れた利点を有する。
【0029】
【実施例】
以下、実施例及び比較例を示し、本発明を具体的に説明するが、本発明は下記の実施例に制限されるものではない。
【0030】
[実施例1]
下記式で示されるSi−H結合含有オルガノポリシロキサン20gとエチニルシクロヘキサノールの10%トルエン溶液0.2gを混合し、更に塩化白金酸−ビニルシロキサン錯体の0.5%トルエン溶液0.1gを添加し、処理液を準備した。これを直径2〜7mmの砂利1000gに添加し、よく混合した。更に混合しながら150℃で1時間熱処理を行い、処理砂利(A)を得た。このものの撥水特性を表2に示す。
【0031】
【化2】
Figure 0003804759
【0032】
[比較例1]
実施例と同様のSi−H結合含有オルガノポリシロキサン20gを直径2〜7mmの砂利1000gに添加し、よく混合した。更に混合しながら180℃で1時間熱処理を行い、処理砂利(B)を得た。このものの撥水特性を表2に示す。
【0033】
[比較例2]
実施例と同様のSi−H結合含有オルガノポリシロキサン20gを直径2〜7mmの砂利1000gに添加し、よく混合した。更にジオクチルスズジラウレートの50%トルエン溶液2gを添加し、混合しながら150℃で1時間熱処理を行い、処理砂利(C)を得た。このものの撥水特性を表2に示す。
【0034】
撥水性評価
上記処理砂利及び未処理砂利の吸水率を下記に示す方法により測定することで、撥水性を評価した。更に、下記に示すUVテスターでの促進試験を行い、耐久性を評価した。
【0035】
吸水率測定:
上記処理砂利及び未処理砂利150g(重量▲1▼)をそれぞれ水中に1晩浸漬し、この処理剤の表面に付着した水を拭き取り、重量(重量▲2▼)を測定し、更に105℃の条件下に24時間放置し、その後の重量(重量▲3▼)を測定した。下記式により吸水率を算出した。
吸水率(%)=[(▲2▼−▲3▼)/▲1▼]×100
【0036】
促進試験:
砂利150gを直径68mm、高さ40mmの微小穴空き円筒形容器に入れ、スーパーUVテスター(岩崎電気製SUVW11シャワー付)にて表1に示す条件で500時間経過したものの吸水率を評価した。
【0037】
【表1】
Figure 0003804759
【0038】
【表2】
Figure 0003804759
【0039】
【発明の効果】
本発明によれば、撥水性が良好であり、かつその持続性に優れた撥水砂利を得ることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to water-repellent gravel and a method for producing the same. More specifically, when used for gravel on roads, railroad tracks, parking lots, chemical plants, parks, gardens, hospitals, factories, schools, amusement parks, cemeteries, etc., water repellency is added, so water repellency is improved. The present invention relates to water gravel and a method for producing the same.
[0002]
[Prior art]
Conventionally, gravel is often laid on roads, railway tracks, parking lots, chemical plants, parks, gardens, hospitals, factories, schools, amusement parks, cemeteries, etc., but water repellency is also used to improve drainage. Is desired. Therefore, as a conventional method for making soil and sand water repellent, water repellent treatment with a silicone emulsion (JP-A-6-206755, JP-A-7-279176, JP-A-9-67571) , JP-A-9-255403, JP-A-11-269463), a method of treating a soil surface with Si-H bond-containing organopolysiloxane (JP-A-1-319585, JP-A-10-279346) , A method of treating soil with a water-repellent substance (JP-A-5-192033), a method of using water-repellent sand treated with silicone (JP-A-6-62660, JP-A-6-101224, JP-A-6-6 No. 113673), a method of treating an inorganic material with chlorosilane (Japanese Patent Laid-Open No. 7-48559), an Si—H bond-containing organ A method of spraying an emulsion of polysiloxane and a curing catalyst on the lawn surface (JP-A-9-157117), a method of coating an alkyd resin and a silicone water repellent (JP-A-2000-23559), and the like have been proposed. .
[0003]
However, the conventional methods have drawbacks that the effect is weak and the sustainability is weak.
[0004]
[Problems to be solved by the invention]
This invention is made | formed in view of the said situation, and it aims at providing the water-repellent gravel which was excellent in water repellency, and was excellent in the sustainability, and its manufacturing method.
[0005]
Means for Solving the Problem and Embodiment of the Invention
As a result of intensive studies to achieve the above-mentioned object, the present inventors applied a composition containing a Si-H bond-containing organopolysiloxane and a platinum catalyst to a gravel and heat-treated it. It was found effective from the point of sustainability.
[0006]
That is, as a conventional silicone treating agent, heat treatment is performed with an Si-H bond-containing organopolysiloxane alone, or a condensation catalyst such as a tin compound, a zinc compound, or an iron compound is used in combination as a curing catalyst, and platinum is used as a curing catalyst. Although there was no method using a compound, the present inventors made (A) an organopolysiloxane containing at least three Si-H bonds in one molecule represented by the following general formula and (B) a platinum catalyst. A water repellent gravel having good water repellency and excellent sustainability by adhering a composition comprising the main component, preferably a composition containing (C) a reaction control agent, to the gravel and heat-treating it. Has been found to yield the present invention.
[0007]
Therefore, the present invention
(A) Organopolysiloxane containing at least three Si—H bonds in one molecule represented by the following general formula: 100 parts by weight [SiO 2 ] p [RSiO 3/2 ] q [R 2 SiO] r [R 3 SiO 1/2 ] s
(In the formula, R is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond having 1 to 20 carbon atoms, p, q and s are each an integer of 0 or more, and r is 3 or more. Is an integer.)
(B) Platinum catalyst 0.0001 to 10 parts by weight (C) If necessary, a composition containing 0.01 to 10 parts by weight of a reaction control agent is attached to gravel and heat-treated. Water repellent gravel and a method for producing the same are provided.
[0008]
Hereinafter, the present invention will be described in more detail.
The composition that is the water-repellent component of the water-repellent gravel of the present invention comprises (A) an organopolysiloxane containing at least three Si-H bonds in one molecule represented by the above general formula, and (B) a platinum catalyst, Or these and (C) reaction control agent become a main component.
[0009]
The organopolysiloxane of component (A) used in the composition of the present invention contains at least three Si—H bonds in one molecule represented by the following general formula.
[SiO 2 ] p [RSiO 3/2 ] q [R 2 SiO] r [R 3 SiO 1/2 ] s
[0010]
In the above formula, R is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond having 1 to 20 carbon atoms, preferably 1 to 12 carbon atoms. Hydrogen atom, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, decyl group, tetradecyl group, alkyl group such as octadecyl group, cycloalkyl group such as cyclohexyl group, phenyl Group, aryl group such as tolyl group, naphthyl group, etc., or hydroxypropyl group, cyanoethyl group in which part or all of hydrogen atoms bonded to carbon atoms of these groups are substituted with hydroxy group, cyano group, halogen atom, etc. , 1-chloropropyl group, 3,3,3-trifluoropropyl group and the like are exemplified, That. R may be the same as or different from each other, but at least three of R are hydrogen atoms.
[0011]
P, q, and s are each an integer of 0 or more, and r is an integer of 3 or more. Preferably, p is 0 to 5, q is 0 to 10, s is 0 to 50, r is 3 to 1, 000, more preferably, p is 0 to 2, q is 0 to 5, s is 0 to 10, and r is an integer of 3 to 500.
[0012]
In the composition of the present invention, since the adhesion to the substrate is considered to be expressed by hydrogen atoms bonded to silicon atoms, the organopolysiloxane has a total proportion of silicon atoms directly bonded to hydrogen atoms. Is preferably 50% by weight or more, particularly preferably 70% by weight or more. The proportion of silicon atoms to which hydrogen atoms are directly connected may be 100% by weight.
[0013]
The molecular structure of the organopolysiloxane is not particularly limited, and may be any of a chain, a branched chain, and a ring. From the viewpoint of workability, the viscosity at 25 ° C. is preferably 5 to 50,000 cP, more preferably It is desirable to be 5 to 5,000 cP.
[0014]
Specific examples of such organopolysiloxanes include the following.
[Chemical 1]
Figure 0003804759
(In the formula, r is the same as above, where b is an integer of 3 or more.)
[0015]
The organopolysiloxane can be synthesized by a known method. For example, in the presence of a catalyst such as sulfuric acid, equilibration of cyclic siloxane containing Si-H bond and cyclic siloxane such as octamethylcyclotetrasiloxane, hexamethyldisiloxane, 1,1,3,3-tetramethyldisiloxane, etc. It is obtained by reacting. Moreover, it can also synthesize | combine by the conventionally well-known method by cohydrolysis condensation reaction, such as methyldichlorosilane, trimethylchlorosilane, and dimethylchlorosilane.
[0016]
Next, the platinum catalyst as component (B) is blended for crosslinking and curing the Si-H bond-containing organopolysiloxane of component (A), and conventionally known platinum compounds can be used. Specific examples include chloroplatinic acid, alcohol-modified chloroplatinic acid, chloroplatinic acid-vinylsiloxane complex, and the like. Among these platinum compounds, a complex of vinyl siloxane and a platinum compound, and a compound obtained by further modifying this with alcohol is preferable. In particular, chloroplatinic acid described in Japanese Patent Publication No. 33-9969, or a combination of vinyl siloxane and chloroplatinic acid. Complexes are preferred.
[0017]
The blending amount of the component (B) is 0.0001 to 10 parts by weight with respect to 100 parts by weight of the component (A). No, it becomes uneconomical. Preferably it is 0.005-1 weight part.
[0018]
Moreover, since the crosslinking reaction by dehydrogenation advances simultaneously with mixing with this (A) component and (B) component, it is desirable to add the reaction control agent which suppresses reaction as (C) component. Examples of such a reaction control agent include acetylene alcohols and acetylene compounds described in Japanese Patent Publication No. 44-31476 and Japanese Patent Publication No. 1-1786.
[0019]
Component (C) is blended in an amount of 0.01 to 10 parts by weight, preferably 0.03 to 1 part by weight per 100 parts by weight of component (A). If the blending amount is less than 0.01 parts by weight, the reaction control effect may be weakened, and if more than 10 parts by weight, the reaction control effect is too strong and the crosslinking reaction may not proceed.
[0020]
In addition to the components described above, various conventionally known additives can be blended as optional components in the composition of the present invention within a range not impairing the effects of the present invention.
[0021]
The composition of this invention can be manufactured by adding the said component and the additive which is an arbitrary component as needed, and mixing by a well-known method.
[0022]
The water-repellent gravel of the present invention is obtained by adhering the above composition to gravel and heat-treating it. Here, the gravel used in the present invention is not particularly limited, and commonly used gravel can be used.
[0023]
The gravel has a diameter of 1 to 15 mm, particularly 2 to 10 mm, from the viewpoint of uniform film formation on the surface.
[0024]
The method for producing water-repellent gravel according to the present invention is obtained by diluting the composition directly or with a solvent, or applying or adding to gravel as an emulsion, and then forming a crosslinked film on the gravel surface at 50 to 250 ° C. Heat treatment.
[0025]
At this time, the solvent to be used is not particularly limited as long as it dissolves the Si-H bond-containing organopolysiloxane. The emulsifier used for emulsification is not particularly limited, and for example, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants and the like can be used.
[0026]
The treatment amount of the composition is preferably 0.1 to 20% by weight, particularly 0.5 to 10% by weight, based on gravel. If the treatment amount is less than 0.1% by weight, the water-repellent effect may be poor, and if it exceeds 20% by weight, no further water-repellent effect can be obtained, which is uneconomical.
[0027]
The heat treatment temperature in the method for producing water-repellent gravel of the present invention is less than 50 ° C. because the reaction takes too much time, so it is impractical, and if it is higher than 250 ° C., silicone may be decomposed. 50 to 250 ° C. Preferably it is 70-200 degreeC. The heat treatment time is not particularly limited, but is usually 15 to 150 minutes.
[0028]
The water-repellent gravel thus obtained has a durable water-repellent property, so roads, railway tracks, parking lots, chemical plants, parks, gardens, hospitals, factories, schools, amusement parks, cemeteries When used for gravel, etc., it has an excellent advantage that drainage is good and the effect is sustained.
[0029]
【Example】
EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.
[0030]
[Example 1]
20 g Si-H bond-containing organopolysiloxane represented by the following formula is mixed with 0.2 g 10% toluene solution of ethynylcyclohexanol, and 0.1 g 0.5% toluene solution of chloroplatinic acid-vinylsiloxane complex is added. Then, a treatment liquid was prepared. This was added to 1000 g of gravel having a diameter of 2 to 7 mm and mixed well. Further, heat treatment was performed at 150 ° C. for 1 hour while mixing to obtain treated gravel (A). The water repellency properties of this product are shown in Table 2.
[0031]
[Chemical 2]
Figure 0003804759
[0032]
[Comparative Example 1]
20 g of Si-H bond-containing organopolysiloxane similar to that of the example was added to 1000 g of gravel having a diameter of 2 to 7 mm and mixed well. Further, heat treatment was performed at 180 ° C. for 1 hour while mixing to obtain treated gravel (B). The water repellency properties of this product are shown in Table 2.
[0033]
[Comparative Example 2]
20 g of Si-H bond-containing organopolysiloxane similar to that of the example was added to 1000 g of gravel having a diameter of 2 to 7 mm and mixed well. Further, 2 g of a 50% toluene solution of dioctyltin dilaurate was added and heat-treated at 150 ° C. for 1 hour with mixing to obtain treated gravel (C). The water repellency properties of this product are shown in Table 2.
[0034]
Evaluation of water repellency The water repellency was evaluated by measuring the water absorption of the above-mentioned treated gravel and untreated gravel by the method shown below. Furthermore, the accelerated test with the UV tester shown below was conducted, and durability was evaluated.
[0035]
Water absorption measurement:
150 g (weight (1)) of the above-mentioned treated gravel and untreated gravel are each immersed in water overnight, the water adhering to the surface of this treatment agent is wiped off, and the weight (weight (2)) is measured. The mixture was allowed to stand for 24 hours under the conditions, and then the weight (weight (3)) was measured. The water absorption was calculated according to the following formula.
Water absorption rate (%) = [((2)-(3)) / (1)] × 100
[0036]
Accelerated test:
150 g of gravel was put in a cylindrical container having a diameter of 68 mm and a height of 40 mm, and the water absorption rate of a super UV tester (with SUVW11 shower manufactured by Iwasaki Electric Co., Ltd.) that passed 500 hours under the conditions shown in Table 1 was evaluated.
[0037]
[Table 1]
Figure 0003804759
[0038]
[Table 2]
Figure 0003804759
[0039]
【The invention's effect】
According to the present invention, water-repellent gravel having good water repellency and excellent durability can be obtained.

Claims (6)

(A)下記一般式で表される1分子中にSi−H結合を少なくとも3個含有するオルガノポリシロキサン 100重量部
[SiO2p[RSiO3/2q[R2SiO]r[R3SiO1/2s
(式中、Rは水素原子又は炭素数1〜20の脂肪族不飽和結合を含有しない非置換若しくは置換の1価炭化水素基、p、q、sはそれぞれ0以上の整数、rは3以上の整数である。)
(B)白金触媒 0.0001〜10重量部
を含有してなる組成物を砂利に付着させて加熱処理してなることを特徴とする撥水砂利。
(A) Organopolysiloxane containing at least three Si—H bonds in one molecule represented by the following general formula: 100 parts by weight [SiO 2 ] p [RSiO 3/2 ] q [R 2 SiO] r [R 3 SiO 1/2 ] s
(In the formula, R is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond having 1 to 20 carbon atoms, p, q and s are each an integer of 0 or more, and r is 3 or more. Is an integer.)
(B) Platinum repellent water repellent gravel characterized in that a composition comprising 0.0001 to 10 parts by weight is adhered to gravel and heat-treated.
組成物が、更に反応制御剤を含有するものである請求項1記載の撥水砂利。The water-repellent gravel according to claim 1, wherein the composition further contains a reaction control agent. 上記組成物を直径が1〜15mmの砂利に0.1〜20重量%付着させたものである請求項1又は2に記載の撥水砂利。The water repellent gravel according to claim 1 or 2, wherein the composition is adhered to gravel having a diameter of 1 to 15 mm in an amount of 0.1 to 20% by weight. (A)下記一般式で表される1分子中にSi−H結合を少なくとも3個含有するオルガノポリシロキサン 100重量部
[SiO2p[RSiO3/2q[R2SiO]r[R3SiO1/2s
(式中、Rは水素原子又は炭素数1〜20の脂肪族不飽和結合を含有しない非置換若しくは置換の1価炭化水素基、p、q、sはそれぞれ0以上の整数、rは3以上の整数である。)
(B)白金触媒 0.0001〜10重量部
を含有してなる組成物を砂利に付着させ、50〜250℃で加熱処理したことを特徴とする撥水砂利の製造方法。
(A) Organopolysiloxane containing at least three Si—H bonds in one molecule represented by the following general formula: 100 parts by weight [SiO 2 ] p [RSiO 3/2 ] q [R 2 SiO] r [R 3 SiO 1/2 ] s
(In the formula, R is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond having 1 to 20 carbon atoms, p, q and s are each an integer of 0 or more, and r is 3 or more. Is an integer.)
(B) Platinum catalyst The manufacturing method of the water repellent gravel characterized by attaching the composition containing 0.0001-10 weight part to gravel, and heat-processing at 50-250 degreeC.
組成物が、更に反応制御剤を含有するものである請求項4記載の製造方法。The production method according to claim 4, wherein the composition further contains a reaction control agent. 上記組成物を直径が1〜15mmの砂利に0.1〜20重量%付着させたものである請求項4又は5に記載の製造方法。The method according to claim 4 or 5, wherein the composition is adhered to gravel having a diameter of 1 to 15 mm in an amount of 0.1 to 20% by weight.
JP2001044579A 2001-02-21 2001-02-21 Water repellent gravel and method for producing the same Expired - Fee Related JP3804759B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001044579A JP3804759B2 (en) 2001-02-21 2001-02-21 Water repellent gravel and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001044579A JP3804759B2 (en) 2001-02-21 2001-02-21 Water repellent gravel and method for producing the same

Publications (2)

Publication Number Publication Date
JP2002241743A JP2002241743A (en) 2002-08-28
JP3804759B2 true JP3804759B2 (en) 2006-08-02

Family

ID=18906548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001044579A Expired - Fee Related JP3804759B2 (en) 2001-02-21 2001-02-21 Water repellent gravel and method for producing the same

Country Status (1)

Country Link
JP (1) JP3804759B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011251875A (en) * 2010-06-02 2011-12-15 Shin-Etsu Chemical Co Ltd Electric-resistant stone material and method for manufacturing the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012137976A1 (en) * 2011-04-08 2012-10-11 東レ・ダウコーニング株式会社 Composition for coating film formation purposes
WO2012157507A1 (en) * 2011-05-17 2012-11-22 東亞合成株式会社 Surface-treating agent and surface treatment method
JP7151957B2 (en) * 2018-06-08 2022-10-12 東亜道路工業株式会社 Pedestrian elastic pavement mixture, construction method and hardening material for pedestrian elastic pavement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011251875A (en) * 2010-06-02 2011-12-15 Shin-Etsu Chemical Co Ltd Electric-resistant stone material and method for manufacturing the same
CN102432213A (en) * 2010-06-02 2012-05-02 信越化学工业株式会社 Method for manufacturing electric registance stone

Also Published As

Publication number Publication date
JP2002241743A (en) 2002-08-28

Similar Documents

Publication Publication Date Title
DE69629405T2 (en) Thermosetting silicone resins
JP4230114B2 (en) Capped silicone film and method for producing the same
EP1417252B1 (en) High refractive index polysiloxanes and their preparation
TWI812618B (en) Hydrosilylation curable silicone resin
JPS643907B2 (en)
JPS61162553A (en) Polysiloxane-containing composition generating transparent mixture upon dilution by water
JP2005523980A (en) Organohydrogen silicon compound
JP2010502780A (en) Branched polysiloxane composition
EP3119847B1 (en) Alkoxy group-containing silicones with reactive functional groups of defined reactivity
JP2010502778A (en) Composition having an anti-mist component
EP0157318B1 (en) Process for the preparation of preliminary products for silicon resins
JPH11246662A (en) Production of polyorganosiloxane
KR102163006B1 (en) Crosslinkable substances based on organosilicon compounds
EP0196169A2 (en) Carboxylhydrocarbyl-substituted silicon compounds
JPH0516456B2 (en)
JP3804759B2 (en) Water repellent gravel and method for producing the same
JP4727006B2 (en) Process for the preparation of polydiorganosiloxanes partially blocked with substituted silethylene groups
JP2978421B2 (en) Water repellent composition
EP0389137B1 (en) Siloxane resins and method for making them
JPH0428033B2 (en)
JPH08311346A (en) Silicic and nitrogenous adhesion accelerator and its composition
KR20100100583A (en) Organosilicone compositions and methods for preparing them
JPH1192694A (en) Emulsion composition
EP0768331B1 (en) Sheet and tube siloxane polymers
JPH07252465A (en) Addition-curing cilicone adhesive composition and n-heterocyclic silane adhesion accelerator

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20060203

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060208

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060419

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060502

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 3804759

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120519

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150519

Year of fee payment: 9

LAPS Cancellation because of no payment of annual fees