JP2012102153A - Method for producing modified silicone-based foam - Google Patents
Method for producing modified silicone-based foam Download PDFInfo
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本発明は体積収縮の小さい変成シリコン系発泡体の製造方法に関する。 The present invention relates to a method for producing a modified silicon foam having a small volume shrinkage.
従来から、液状樹脂を発泡成形してなる軟質発泡体は、柔軟性、緩衝性、軽量性等に優れていることや、製品に対する原料樹脂の使用量を減らすことができるという経済性の高さから、様々な分野で広く使用されている。 Conventionally, a soft foam formed by foaming a liquid resin is excellent in flexibility, cushioning properties, lightness, etc., and economically high in that it can reduce the amount of raw material resin used in products. Are widely used in various fields.
特に、アスカーＦＰ型硬度計で測定した硬度が１０度以下になるような超軟質発泡体は、極めて柔軟で、応力追従性、衝撃や振動の吸収、緩和、分散性に優れることからベッド、マット、枕、クッション、パッドのように人体各部に当てて使用する製品などへの需要が増加している。このような超軟質発泡体の一つとして特許文献１には変成シリコン系発泡体が開示されている。
In particular, an ultra-soft foam having a hardness measured by an Asker FP hardness tester of 10 degrees or less is extremely soft and has excellent stress following ability, absorption of shock and vibration, relaxation, and dispersibility. There is an increasing demand for products that are applied to various parts of the human body, such as pillows, cushions, and pads. As such an ultra-soft foam,
変性シリコン系発泡体は柔軟性が高く、切断や打抜き等の後工程を行う際に発泡体が変形するため安定した寸法での加工が難しい。このことから変性シリコン系発泡体はモールド成形により製造されることが多いが、硬度を低くする目的から、架橋密度が低く抑えられており、そのため成形時の発泡体の体積収縮により寸法安定性が低くなるという問題があった。 The modified silicon-based foam has high flexibility and is difficult to process with a stable dimension because the foam is deformed when a subsequent process such as cutting or punching is performed. For this reason, modified silicon-based foams are often produced by molding, but for the purpose of lowering hardness, the crosslink density is kept low, so that the dimensional stability is reduced by volume shrinkage of the foam during molding. There was a problem of being lowered.
本発明は、上記した問題点に注目し、簡便な方法で従来より体積収縮を抑えた変成シリコン系発泡体の製造方法の開発を課題とするものである。 The present invention pays attention to the above-mentioned problems, and an object of the present invention is to develop a method for producing a modified silicon foam having a volumetric shrinkage suppressed by a simple method.
本発明は、前記課題の解決のため鋭意研究を重ねた結果、以下の構成による製法により体積収縮を抑えた変成シリコン系発泡体を得ることが出来る。 In the present invention, as a result of intensive studies for solving the above-mentioned problems, a modified silicon-based foam with reduced volume shrinkage can be obtained by a production method having the following constitution.
１）． （Ａ）分子鎖中に少なくとも１個のアルケニル基を有し、主鎖を構成する繰り返し単位が飽和炭化水素系単位、または、オキシアルキレン系単位からなる重合体、（Ｂ）分子鎖中に少なくとも２個のヒドロシリル基を有する硬化剤、（Ｃ）ヒドロシリル基と反応して水素を発生するＯＨ基を有する発泡剤、（Ｄ）アルケニル基とＯＨ基を有する発泡助剤、（Ｅ）ヒドロシリル化触媒、を含んでなる発泡性材料のうち、発泡剤（Ｃ）と発泡助剤（Ｄ）の添加量を｛発泡剤（Ｃ）および発泡助剤（Ｄ）のヒドロシリル基と反応して水素を発生するＯＨ基のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を０．８から１．２の範囲となるように調整することを特徴とする変成シリコン系発泡体の製造方法。 1). (A) a polymer having at least one alkenyl group in the molecular chain, wherein the repeating unit constituting the main chain is a saturated hydrocarbon unit or an oxyalkylene unit, (B) at least in the molecular chain A curing agent having two hydrosilyl groups, (C) a blowing agent having an OH group that reacts with the hydrosilyl group to generate hydrogen, (D) a blowing aid having an alkenyl group and an OH group, and (E) a hydrosilylation catalyst The amount of the foaming agent (C) and the foaming aid (D) added in the foamable material comprising {, reacts with the hydrosilyl group of the foaming agent (C) and the foaming aid (D) to generate hydrogen. The total number of moles of OH groups to be prepared} / {number of moles of hydrosilyl groups of the curing agent (B)} is adjusted to be in the range of 0.8 to 1.2. Production method.
２）．発泡助剤（Ｄ）の添加量を｛発泡助剤（Ｄ）のヒドロシリル基と反応して水素を発生するＯＨ基のモル数｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を０．２２から０．３０の範囲になるように調整することを特徴とする１）に記載の変成シリコン系発泡体の製造方法。 2). The amount of the foaming aid (D) added is {the number of moles of OH groups that react with the hydrosilyl group of the foaming aid (D) to generate hydrogen} / {number of moles of the hydrosilyl group of the curing agent (B)}. The method for producing a modified silicon-based foam according to 1), which is adjusted to be in a range of .22 to 0.30.
３）． （Ａ）分子鎖中に少なくとも１個のアルケニル基を有し、主鎖を構成する繰り返し単位が飽和炭化水素系単位、または、オキシアルキレン系単位からなる重合体、（Ｂ）分子鎖中に少なくとも２個のヒドロシリル基を有する硬化剤、（Ｃ）ヒドロシリル基と反応して水素を発生するＯＨ基を有する発泡剤、（Ｄ）アルケニル基とＯＨ基を有する発泡助剤、（Ｅ）ヒドロシリル化触媒、を含んでなる発泡性材料のうち、発泡剤（Ｃ）と発泡助剤（Ｄ）の添加量を｛発泡剤（Ｃ）および発泡助剤（Ｄ）のヒドロシリル基と反応して水素を発生するＯＨ基のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を０．８から１．２の範囲となるように調整した発泡性材料を発泡した変成シリコン系発泡体。 3). (A) a polymer having at least one alkenyl group in the molecular chain, wherein the repeating unit constituting the main chain is a saturated hydrocarbon unit or an oxyalkylene unit, (B) at least in the molecular chain A curing agent having two hydrosilyl groups, (C) a blowing agent having an OH group that reacts with the hydrosilyl group to generate hydrogen, (D) a blowing aid having an alkenyl group and an OH group, and (E) a hydrosilylation catalyst The amount of the foaming agent (C) and the foaming aid (D) added in the foamable material comprising {, reacts with the hydrosilyl group of the foaming agent (C) and the foaming aid (D) to generate hydrogen. Modified silicon foam obtained by foaming a foamable material in which the total number of moles of OH groups to be produced / {number of moles of hydrosilyl groups of curing agent (B)} is adjusted to be in the range of 0.8 to 1.2 .
４）． 発泡助剤（Ｄ）の添加量を｛発泡助剤（Ｄ）のヒドロシリル基と反応して水素を発生するＯＨ基のモル数｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を０．２２から０．３０の範囲になるように調整することを特徴とする３）に記載の変成シリコン系発泡体。 4). The amount of the foaming aid (D) added is {the number of moles of OH groups that react with the hydrosilyl group of the foaming aid (D) to generate hydrogen} / {number of moles of the hydrosilyl group of the curing agent (B)}. The modified silicon-based foam according to 3), which is adjusted to be in a range of .22 to 0.30.
本発明によれば従来より体積収縮を抑えた変成シリコン系発泡体を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the modified silicon type foam which suppressed volume shrinkage conventionally can be provided.
以下、本発明につき、さらに詳細に説明する。
変成シリコン系発泡体は分子鎖中に少なくとも平均して１個のアルケニル基を有し、主鎖を構成する繰り返し単位が飽和炭化水素系単位、または、オキシアルキレン系単位からなる重合体（Ａ）（以下、単に、重合体（Ａ）と称す場合がある）に、ヒドロシリル基と反応して水素を発生するＯＨ基を有する発泡剤（Ｃ）、片方の末端がアルケニル基、もう一方の末端がヒドロシリル基と反応して水素を発生するＯＨ基を有する発泡助剤（Ｄ）、ヒドロシリル化触媒（Ｅ）、を添加し攪拌混合を行い、その後に分子鎖中に平均して少なくとも２個のヒドロシリル基を有する硬化剤（Ｂ）（以下、単に、硬化剤（Ｂ）と称す場合がある）を添加し、攪拌混合を行って作製した発泡性材料を発泡、硬化することで製造することができる。
Hereinafter, the present invention will be described in more detail.
The modified silicon-based foam has a polymer chain (A) having at least one alkenyl group on average in the molecular chain, and the repeating unit constituting the main chain is a saturated hydrocarbon-based unit or an oxyalkylene-based unit (Hereinafter simply referred to as the polymer (A)), a foaming agent (C) having an OH group that reacts with a hydrosilyl group to generate hydrogen, one end is an alkenyl group, and the other end is A foaming aid (D) having an OH group that reacts with a hydrosilyl group to generate hydrogen and a hydrosilylation catalyst (E) are added and mixed with stirring, and then, on average, at least two hydrosilyl groups in the molecular chain It can be produced by adding a curing agent (B) having a group (hereinafter sometimes simply referred to as a curing agent (B)), and foaming and curing a foamable material produced by stirring and mixing. .
本発明では、発泡剤（Ｃ）と発泡助剤（Ｄ）の添加量を、｛発泡剤（Ｃ）および発泡助剤（Ｄ）のヒドロシリル基と反応して水素を発生するＯＨ基（ヒドロキシル基）のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝が０．８から１．２の範囲になるように調整することで体積収縮を１５％以下まで小さくすることができる。好ましくは、０．９〜１．２の範囲になるように調整することで体積収縮を１４％以下まで小さくすることも可能である。 In the present invention, the addition amount of the foaming agent (C) and the foaming aid (D) is changed to {an OH group (hydroxyl group) which reacts with the hydrosilyl group of the foaming agent (C) and the foaming aid (D) to generate hydrogen. ) Of the total number of moles} / {number of moles of hydrosilyl group of the curing agent (B)} is adjusted to be in the range of 0.8 to 1.2, thereby reducing the volume shrinkage to 15% or less. it can. Preferably, the volume shrinkage can be reduced to 14% or less by adjusting to be in the range of 0.9 to 1.2.
好ましくは、さらに発泡助剤（Ｄ）の添加量を｛発泡助剤（Ｄ）のヒドロシリル基と反応して水素を発生するＯＨ基のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝が０．２２から０．３０の範囲になるように調整することで、体積収縮を１０％以下まで、さらには０．２３〜０．２９の範囲になるように調整することで、体積収縮を９％以下まで小さくすることができる。なお、体積収縮率の下限値は特に限定はないが、金型と同じ大きさすなわち、ゼロであると収縮率の考慮をしなくても金型と同じ成型体がえられるので好ましいが、実際には難しい面もあり、強いて下限値を例示するなら２％以上、４％以上、５％以上の値を挙げることができる。 Preferably, the amount of the foaming aid (D) added is {the total number of moles of OH groups that react with the hydrosilyl group of the foaming aid (D) to generate hydrogen} / {the hydrosilyl group of the curing agent (B). Is adjusted so that the volume shrinkage is in the range of 0.22 to 0.30, the volume shrinkage is adjusted to 10% or less, and further in the range of 0.23 to 0.29. , Volume shrinkage can be reduced to 9% or less. The lower limit value of the volume shrinkage rate is not particularly limited, but it is preferable that the same size as the mold, that is, zero, because the same molded body as the mold can be obtained without considering the shrinkage rate. There is also a difficult aspect, and if the lower limit value is exemplified, a value of 2% or more, 4% or more, and 5% or more can be given.
本発明における重合体（Ａ）は分子鎖中に平均して少なくとも１個のアルケニル基を有し、主鎖を構成する繰り返し単位が飽和炭化水素系単位、または、オキシアルキレン系単位からなる重合体であれば、特に限定するものではない。 The polymer (A) in the present invention has an average of at least one alkenyl group in the molecular chain, and the repeating unit constituting the main chain is a saturated hydrocarbon unit or an oxyalkylene unit. If it is, it will not specifically limit.
重合体（Ａ）は、硬化剤（Ｂ）とヒドロシリル化反応して硬化する成分であり、分子鎖中に少なくとも１個のアルケニル基を有するため、ヒドロシリル化反応が起こって高分子状となり、硬化する。重合体（Ａ）に含まれるアルケニル基の数は、硬化剤（Ｂ）とヒドロシリル化反応する点から少なくとも平均して１個以上であることが必要である。重合体（Ａ）に該当するものとしては、カネカサイリル（株式会社カネカ製）として販売されているものを用いることが出来る。 The polymer (A) is a component that is cured by a hydrosilylation reaction with the curing agent (B). Since the polymer (A) has at least one alkenyl group in the molecular chain, the hydrosilylation reaction takes place and becomes a polymer. To do. The number of alkenyl groups contained in the polymer (A) needs to be at least one on average on average from the point of hydrosilylation reaction with the curing agent (B). As what corresponds to a polymer (A), what is marketed as Kaneka Silyl (made by Kaneka Corporation) can be used.
硬化剤（Ｂ）は、重合体（Ａ）の硬化剤として作用する。硬化剤（Ｂ）は、ヒドロシリル基を有し、そのため、それぞれのヒドロシリル基が重合体（Ａ）に存在するアルケニル基と反応して硬化する。分子鎖中には平均して少なくとも２個のヒドロシリル基を有するが、ヒドロシリル基の上限は５０個以下が好ましい。 The curing agent (B) acts as a curing agent for the polymer (A). The curing agent (B) has a hydrosilyl group, so that each hydrosilyl group reacts with an alkenyl group present in the polymer (A) to be cured. Although the molecular chain has an average of at least two hydrosilyl groups, the upper limit of hydrosilyl groups is preferably 50 or less.
なお、本発明において、ヒドロシリル基を１個有するとは、ＳｉＨ結合を１個有することを言い、ＳｉＨ２の場合にはヒドロシリル基を２個有することになるが、１つのＳｉに結合するＨの数は、１つであるほうが硬化性は良くなり、また、柔軟性の点からも好ましい。本発明において「分子鎖中に平均して１個のヒドロシリル基」とは、１ｇあたりのヒドロシリル基量にその物質の数平均分子量をかけたものである。本発明においては、ヒドロシリル基以外の官能基についても特に断りのない限り同様に、分子鎖中の官能基数を計算したものを示す。 In the present invention, having one hydrosilyl group means having one SiH bond. In the case of SiH 2 , it has two hydrosilyl groups. A number of 1 is preferable from the viewpoint of flexibility because the curability is improved. In the present invention, “average of one hydrosilyl group in a molecular chain” is obtained by multiplying the amount of hydrosilyl group per gram by the number average molecular weight of the substance. In the present invention, the number of functional groups in the molecular chain is similarly calculated for functional groups other than hydrosilyl groups unless otherwise specified.
前記のごとく硬化剤（Ｂ）の構造については分子鎖中には少なくとも２個のヒドロシリル基を有する以外特に制限はないが、例えば、炭化水素硬化剤やポリシロキサン系硬化剤が例示できる。 As described above, the structure of the curing agent (B) is not particularly limited except that the molecular chain has at least two hydrosilyl groups, and examples thereof include hydrocarbon curing agents and polysiloxane curing agents.
本発明における発泡剤（Ｃ）としては、ヒドロシリル基と反応して水素を発生するＯＨ基を含有する化合物である。具体的には１級飽和炭化水素アルコール、カルボン酸または水が挙げられる。 The foaming agent (C) in the present invention is a compound containing an OH group that reacts with a hydrosilyl group to generate hydrogen. Specific examples include primary saturated hydrocarbon alcohols, carboxylic acids, and water.
本発明における発泡助剤（Ｄ）としては、ヒドロシリル基と反応して水素を発生するＯＨ基とアルケニル基を有する化合物であれば特に限定はないが、分子末端にヒドロシリル基と反応して水素を発生するＯＨ基を含有し、もう一方の末端にアルケニル基を有する化合物が好ましい。具体的にはエチレングリコールモノアリルエーテル、ポリエチレングリコールモノアリルエーテル、ポリプロピレングリコールモノアリルエーテル、エチレングリコールプロピレングリコール共重合体のモノアリルエーテル、グリセリンモノアリルエーテル、グリセリンジアリルエーテルなどが挙げられる。 The foaming aid (D) in the present invention is not particularly limited as long as it is a compound having an OH group and an alkenyl group that react with a hydrosilyl group to generate hydrogen, but reacts with a hydrosilyl group at the molecular end to generate hydrogen. A compound containing the generated OH group and having an alkenyl group at the other end is preferred. Specific examples include ethylene glycol monoallyl ether, polyethylene glycol monoallyl ether, polypropylene glycol monoallyl ether, ethylene glycol propylene glycol copolymer monoallyl ether, glycerin monoallyl ether, and glyceryl diallyl ether.
本発明のヒドロシリル化触媒（Ｅ）としては、ヒドロシリル化触媒として働くものである限り、特に制限はなく、任意のものを使用する。ヒドロシリル化触媒としての具体例としては、白金の担体、アルミナ、シリカ、カーボンブラックなどの担体に固体白金を担持させたもの、塩化白金酸、塩化白金酸とアルコール、アルデヒド、ケトンなどとの錯体、白金−オレフィン錯体、白金−ビニルシロキサン錯体、白金−ホスフィン錯体、白金−ホスファイト錯体、ジカルボニルジクロロ白金などが挙げられる。 The hydrosilylation catalyst (E) of the present invention is not particularly limited as long as it functions as a hydrosilylation catalyst, and an arbitrary one is used. Specific examples of hydrosilylation catalysts include platinum carriers, alumina, silica, carbon black and other carriers supported with solid platinum, chloroplatinic acid, complexes of chloroplatinic acid and alcohols, aldehydes, ketones, etc. Examples include platinum-olefin complexes, platinum-vinylsiloxane complexes, platinum-phosphine complexes, platinum-phosphite complexes, and dicarbonyldichloroplatinum.
その他に本発明の効果をなくさない程度であれば、充填材、貯蔵安定剤、可塑剤、増粘剤など、必要に応じて添加してもよい。 In addition, fillers, storage stabilizers, plasticizers, thickeners and the like may be added as necessary as long as the effects of the present invention are not lost.
本発明の方法により、体積収縮が１５％以下まで抑制され、従来より寸法安定性の高い変成シリコン系発泡体を製造することができる。 By the method of the present invention, volumetric shrinkage is suppressed to 15% or less, and a modified silicon-based foam having higher dimensional stability than conventional ones can be produced.
本願発明の方法により得られた変性シリコン系発泡体は軽量であり、柔軟性に優れるため、クッションやパッドに好適に用いられる。 The modified silicon-based foam obtained by the method of the present invention is lightweight and excellent in flexibility, and thus is suitably used for cushions and pads.
以下に実施例を挙げて本発明をさらに詳しく説明するが、本発明はこれらの実施例に限定されたものではない。 The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
＜モールド型＞
図１に示す、表面を厚さ５０マイクロメートルのＰＴＦＥでコーティングしたアルミ製の金型１（内寸法：５２０ｍｍ×３５０ｍｍ×深さ５０ｍｍ）に表面を厚さ５０マイクロメートルのＰＴＦＥでコーティングした鉄製の上蓋２（寸法：５５０ｍｍ×３８０ｍｍ×厚み１．５ｍｍ、注入口：内径３０ｍｍ）を取り付けてモールド型を組み立てた。
実施例および比較例においてはこのモールド型を用いた。
<Mold mold>
As shown in FIG. 1, an aluminum mold 1 (inner dimensions: 520 mm × 350 mm × depth 50 mm) coated with PTFE having a thickness of 50 μm on the surface is made of iron and coated with PTFE having a thickness of 50 μm on the surface. An upper lid 2 (size: 550 mm × 380 mm × thickness 1.5 mm, injection port: inner diameter 30 mm) was attached to assemble a mold.
This mold was used in Examples and Comparative Examples.
＜使用化合物＞
実施例においては表１に示す化合物を用いた。
<Compound used>
In the examples, the compounds shown in Table 1 were used.
（実施例１）
ディスポーザブルカップの中にトータル１２００ｇになるように、１００重量部の重合体（Ａ）に対して、発泡剤（Ｃ）を９．１重量部、発泡助剤（Ｄ）を１６．１重量部、触媒（Ｅ）を０．１３重量部加えて攪拌混合を行い、さらに硬化剤（Ｂ）を１３重量部添加してすばやく攪拌混合を行って発泡性材料を作製した。
Example 1
9.1 parts by weight of the foaming agent (C) and 16.1 parts by weight of the foaming aid (D) with respect to 100 parts by weight of the polymer (A) so that the total amount is 1200 g in the disposable cup. 0.13 parts by weight of catalyst (E) was added and stirred and mixed, and 13 parts by weight of curing agent (B) was further added and rapidly stirred and mixed to prepare a foamable material.
次に、前記モールド型に注入口から発泡性材料を１ｋｇ注入した。注入完了後、注入口をキャビティー内部ガスの排気口にするために、注入口はそのまま開放状態にした。このモールド型をファンが設けられた加熱炉内に置き、５０℃で６０分間加熱して発泡性材料を発泡させてキャビティー内に充満させつつ、硬化させた。加熱終了後にモールド型を加熱炉から取り出し、モールド型から脱型して発泡体を得た。 Next, 1 kg of foamable material was injected into the mold from the injection port. After the completion of the injection, the inlet was left open to make the inlet an exhaust port for the gas inside the cavity. The mold was placed in a heating furnace provided with a fan, and heated at 50 ° C. for 60 minutes to foam the foamable material and fill the cavity to be cured. After the heating, the mold was removed from the heating furnace and removed from the mold to obtain a foam.
（実施例２）
発泡剤（Ｃ）を８．５重量部、発泡助剤（Ｄ）を２１．６重量部とした以外は、全て実施例１と同じ工程で発泡体を作製し、実施例２とした。
(Example 2)
Except that the foaming agent (C) was 8.5 parts by weight and the foaming aid (D) was 21.6 parts by weight, a foam was produced in the same steps as in Example 1 to obtain Example 2.
（比較例）
発泡剤（Ｃ）を１３．０重量部とした以外は、全て実施例１と同じ工程で発泡体を作製した。
実施例の測定、評価は次の条件・方法により行った。評価結果を表２に示す。
(Comparative example)
Except that the foaming agent (C) was 13.0 parts by weight, a foam was produced in the same steps as in Example 1.
The measurement and evaluation of the examples were performed under the following conditions and methods. The evaluation results are shown in Table 2.
＜発泡倍率＞
発泡倍率については、下記
発泡倍率（倍）＝発泡体体積（ｃｍ３）／同重量の（未発泡の）発泡性材料の体積（ｃｍ３）
の計算式から算出した。
<Foaming ratio>
Regarding the expansion ratio, the following expansion ratio (times) = foam volume (cm 3 ) / volume of the foam material with the same weight (unfoamed) (cm 3 )
It was calculated from the following formula.
＜体積収縮率＞
体積収縮率については、下記
体積収縮率（％）＝１００×｛１−（発泡体の体積／使用する金型のキャビティー体積）｝
の計算式から算出した。
<Volume shrinkage>
For volume shrinkage, the following volume shrinkage (%) = 100 × {1− (volume of foam / cavity volume of mold used)}
It was calculated from the following formula.
表２のように、｛発泡剤（Ｃ）および発泡助剤（Ｄ）のヒドロキシル基のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を１．１０にした実施例１の発泡体は体積収縮率１２．８％となり、｛発泡剤（Ｃ）および発泡助剤（Ｄ）のヒドロキシル基のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を１．５にした比較例の発泡体（体積収縮率２５．０％）よりも、体積収縮が小さくなった。 As shown in Table 2, {the total number of moles of hydroxyl groups of the foaming agent (C) and foaming aid (D)} / {number of moles of hydrosilyl groups of the curing agent (B)} was 1.10 1 foam volume shrinkage of 12.8%, {total number of moles of hydroxyl groups of foaming agent (C) and foaming aid (D)} / {number of moles of hydrosilyl groups of curing agent (B)} The volume shrinkage was smaller than that of the foam of Comparative Example (volume shrinkage rate: 25.0%) having a ratio of 1.5.
また、｛発泡剤（Ｃ）および発泡助剤（Ｄ）のヒドロキシル基のモル数の合計｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を１．１０に、｛発泡助剤（Ｄ）のヒドロキシル基のモル数｝／｛硬化剤（Ｂ）のヒドロシリル基のモル数｝を０．２５にした実施例２の発泡体は体積収縮率８．２％となり、実施例１の発泡体よりも、さらに体積収縮が小さくなった。 Also, {total number of moles of hydroxyl groups of foaming agent (C) and foaming aid (D)} / {number of moles of hydrosilyl group of curing agent (B)} is 1.10, {foaming aid (D ) Of hydroxyl group} / {number of moles of hydrosilyl group of curing agent (B)} was 0.25, the foam of Example 2 had a volume shrinkage of 8.2%, and the foam of Example 1 The volume shrinkage was further reduced.
Claims (4)
The amount of the foaming aid (D) added is {the number of moles of OH groups that react with the hydrosilyl group of the foaming aid (D) to generate hydrogen} / {number of moles of the hydrosilyl group of the curing agent (B)}. The modified silicon-based foam according to claim 3, wherein the modified silicon-based foam is adjusted to be in a range of .22 to 0.30.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160319071A1 (en) * | 2015-05-01 | 2016-11-03 | Shin-Etsu Chemical Co., Ltd. | Fluoropolyether-containing polymer-modified silane, surface treating agent, and article |
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|---|---|---|---|---|
| JP2002187969A (en) * | 2000-12-20 | 2002-07-05 | Ge Toshiba Silicones Co Ltd | Silicone foaming material and foamed product |
| WO2008032697A1 (en) * | 2006-09-11 | 2008-03-20 | Kaneka Corporation | Foam and process for producing the same |
| JP2009074041A (en) * | 2007-08-30 | 2009-04-09 | Kaneka Corp | Foam and its production method |
| JP2010270242A (en) * | 2009-05-22 | 2010-12-02 | Kaneka Corp | Modified silicone resin soft foam and bedclothes comprising the foam |
| JP2011079937A (en) * | 2009-10-06 | 2011-04-21 | Kaneka Corp | Modified silicone resin foam |
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|---|---|---|---|---|
| JP2002187969A (en) * | 2000-12-20 | 2002-07-05 | Ge Toshiba Silicones Co Ltd | Silicone foaming material and foamed product |
| WO2008032697A1 (en) * | 2006-09-11 | 2008-03-20 | Kaneka Corporation | Foam and process for producing the same |
| JP2009074041A (en) * | 2007-08-30 | 2009-04-09 | Kaneka Corp | Foam and its production method |
| JP2010270242A (en) * | 2009-05-22 | 2010-12-02 | Kaneka Corp | Modified silicone resin soft foam and bedclothes comprising the foam |
| JP2011079937A (en) * | 2009-10-06 | 2011-04-21 | Kaneka Corp | Modified silicone resin foam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160319071A1 (en) * | 2015-05-01 | 2016-11-03 | Shin-Etsu Chemical Co., Ltd. | Fluoropolyether-containing polymer-modified silane, surface treating agent, and article |
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