JP2019189804A5 - - Google Patents

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JP2019189804A5
JP2019189804A5 JP2018086956A JP2018086956A JP2019189804A5 JP 2019189804 A5 JP2019189804 A5 JP 2019189804A5 JP 2018086956 A JP2018086956 A JP 2018086956A JP 2018086956 A JP2018086956 A JP 2018086956A JP 2019189804 A5 JP2019189804 A5 JP 2019189804A5
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すなわち、本発明は、以下を要旨とする;
(1)ポリオール成分、イソシアネート成分、フィラー、発泡剤、触媒、整泡剤を含むポリウレタン原料からなるポリウレタンフォームであって、前記ポリオール成分が、数平均分子量が300以上3500以下、平均官能基数が2、及び平均水酸基価が35mgKOH/g以上200mgKOH/g以下のポリテトラメチレンエーテルグリコールを含み、前記フィラーが、比重0.25g/cm以上1.0g/cm未満であり、JIS K 7222に準拠して測定されたポリウレタンフォームの密度が0.25g/cm以上0.35g/cm以下であり、JIS K 7312に準拠し、アスカーゴム硬度計C型を用いて測定されたポリウレタンフォームの硬度が50以上65以下であり
、耐屈曲性を備えたことを特徴とするポリウレタンフォーム。
(2)前記フィラーの平均粒子径が10μm以上60μm未満である、上記(1)に記載のポリウレタンフォーム。
(3)前記フィラーの添加量が、前記ポリオール成分100質量部に対し、5質量部以上20質量部未満である、上記(1)又は(2)に記載のポリウレタンフォーム。
(4)縦が120mm、横が60mm、且つ、厚みが6mmとなるように形成されたポリウレタンフォームを準備し、該ポリウレタンフォームに厚さが2mmの樹脂含浸ボードを接着した複合体を作成し、該複合体を縦方向に沿った中央位置で複合体の半分を90°折り曲げる操作と該複合体の半分を元の位置に戻す操作で構成される曲げ戻し操作を144回/分の速度で繰り返した場合に、ポリウレタンフォームに亀裂の発生が認められるまでの曲げ戻し操作の回数が2万回以上である、上記(1)から(3)のいずれかに記載のポリウレタンフォーム。
(5)JIS K 6262に準拠して測定されたポリウレタンフォームの圧縮永久歪率が20%以下である、上記(1)から(4)のいずれかに記載のポリウレタンフォーム。
(6)前記イソシアネート成分は、i)数平均分子量が500以上2000以下、平均官能基数が2以上3以下、イソシアネート基含有率が3〜10質量%のイソシアネート基末端プレポリマーと、ii)イソシアネート基含有率が25〜33質量%の変性MDIとを含む、上記(1)から(5)のいずれかに記載のポリウレタンフォーム。
(7)厚みが12.5mmとなるように形成されたポリウレタンフォームからなる試験片を準備し、該試験片に5.1kgの錘を50mmの高さから衝突させた場合に、試験片への最大衝撃荷重が0.9kN以下である、上記(1)から(6)のいずれかに記載のポリウレタンフォーム。
(8)JIS K 6255に準拠して測定されたポリウレタンフォームの反発弾性率が60%以上である、上記(1)から(7)のいずれかに記載のポリウレタンフォーム。
(9)モールド成型体である、上記(1)から(8)のいずれかに記載のポリウレタンフォーム。
(10)上記(1)から(9)のいずれかに記載のポリウレタンフォームを用いたことを特徴とする靴底部材。
That is, the present invention has the following gist;
(1) A polyurethane foam made of a polyurethane raw material containing a polyol component, an isocyanate component, a filler, a foaming agent, a catalyst, and a foam stabilizer, wherein the polyol component has a number average molecular weight of 300 or more and 3500 or less and an average number of functional groups of 2. , And a polytetramethylene ether glycol having an average hydroxyl value of 35 mgKOH / g or more and 200 mgKOH / g or less, and the filler has a specific gravity of 0.25 g / cm 3 or more and less than 1.0 g / cm 3 , and conforms to JIS K 7222. The density of the polyurethane foam measured in the above is 0.25 g / cm 3 or more and 0.35 g / cm 3 or less, and the hardness of the polyurethane foam measured using the Asker rubber hardness tester C type in accordance with JIS K 7312 is A polyurethane foam having a bending resistance of 50 or more and 65 or less.
(2) The polyurethane foam according to (1) above, wherein the average particle size of the filler is 10 μm or more and less than 60 μm.
(3) The polyurethane foam according to (1) or (2) above, wherein the amount of the filler added is 5 parts by mass or more and less than 20 parts by mass with respect to 100 parts by mass of the polyol component.
(4) A polyurethane foam formed so as to have a length of 120 mm, a width of 60 mm, and a thickness of 6 mm was prepared, and a composite was prepared by adhering a resin-impregnated board having a thickness of 2 mm to the polyurethane foam. The bending back operation consisting of the operation of bending half of the complex by 90 ° at the central position along the vertical direction and the operation of returning the half of the complex to the original position is repeated at a speed of 144 times / minute. The polyurethane foam according to any one of (1) to (3) above, wherein the number of bending back operations until cracks are observed in the polyurethane foam is 20,000 or more.
(5) The polyurethane foam according to any one of (1) to (4) above, wherein the polyurethane foam has a compression set of 20% or less measured in accordance with JIS K 6262.
(6) The isocyanate components include i) an isocyanate group-terminated prepolymer having a number average molecular weight of 500 or more and 2000 or less, an average number of functional groups of 2 or more and 3 or less, and an isocyanate group content of 3 to 10% by mass, and ii) an isocyanate group. The polyurethane foam according to any one of (1) to (5) above, which comprises a modified MDI having a content of 25 to 33% by mass.
(7) A test piece made of polyurethane foam formed so as to have a thickness of 12.5 mm is prepared, and when a 5.1 kg weight is made to collide with the test piece from a height of 50 mm, the test piece is subjected to. The polyurethane foam according to any one of (1) to (6) above, wherein the maximum impact load is 0.9 kN or less.
(8) The polyurethane foam according to any one of (1) to (7) above, wherein the rebound resilience of the polyurethane foam measured according to JIS K 6255 is 60% or more.
(9) The polyurethane foam according to any one of (1) to (8) above, which is a molded body.
(10) A shoe sole member using the polyurethane foam according to any one of (1) to (9) above.

本発明のポリオール成分としては、数平均分子量が300以上3500以下、平均官能基数が2、及び平均水酸基価が35mgKOH/g以上200mgKOH/g以下のポリテトラメチレンエーテルグリコール(以下、第1のPTMGと言う)を用いる。
なお、本発明では、数平均分子量が異なるPTMGを2種以上混合して用いてもよい。
The polyol component of the present invention includes polytetramethylene ether glycol having a number average molecular weight of 300 or more and 3500 or less, an average number of functional groups of 2, and an average hydroxyl value of 35 mgKOH / g or more and 200 mgKOH / g or less (hereinafter referred to as the first PTMG). Say) is used.
In the present invention, two or more types of PTMGs having different number average molecular weights may be mixed and used.

PTMGの数平均分子量が300未満だったり、平均水酸基価が200mgKOH/gを超える場合には、得られるポリウレタンフォームのセルサイズが不均一になったり、柔軟性が損なわれやすく、所望の耐屈曲性が得られない。
一方、数平均分子量が3500を超えたり、平均水酸基価が35mgKOH/g未満の場合では、ポリオールの粘度が上昇してしまい成型が困難となる。
好ましい範囲としては、数平均分子量が1000以上2500以下、平均官能基数が2、及び平均水酸基価が50mgKOH/g以上100mgKOH/g以下である。
When the number average molecular weight of PTMG is less than 300 or the average hydroxyl value exceeds 200 mgKOH / g, the cell size of the obtained polyurethane foam tends to be non-uniform, the flexibility is easily impaired, and the desired bending resistance is obtained. Cannot be obtained.
On the other hand, when the number average molecular weight exceeds 3500 or the average hydroxyl value is less than 35 mgKOH / g, the viscosity of the polyol increases and molding becomes difficult.
The preferred range is that the number average molecular weight is 1000 or more and 2500 or less, the average number of functional groups is 2, and the average hydroxyl value is 50 mgKOH / g or more and 100 mgKOH / g or less.

イソシアネートに反応させるポリオールについて、上記(α)、(β)、(γ)に示すものは単独でまたは2種以上混合したものでもよい。イソシアネートに反応させるポリオールは、上記(α)、(β)、(γ)に示すものの中でも、ポリエーテルポリオールが好ましく、より好ましくはポリテトラメチレンエーテルグリコール(以下、これを第2のPTMGと言う)である。なお、第2のPTMGの範囲には、「第1のPTMG(数平均分子量が300以上3500以下、平均官能基数が、及び平均水酸基価が35mgKOH/g以上200mgKOH/g以下のポリテトラメチレンエーテルグリコール)」、及び、「数平均分子量と平均官能基数と平均水酸基価のうちの少なくとも一種が第1のPTMGに該当するための条件となる範囲から外れているようなポリテトラメチレンエーテルグリコール」が含まれる。
Regarding the polyol to be reacted with isocyanate, those shown in (α), (β) and (γ) above may be used alone or in combination of two or more. Among the polyols shown in (α), (β), and (γ) above, the polyol to be reacted with isocyanate is preferably a polyether polyol, more preferably a polytetramethylene ether glycol (hereinafter, this is referred to as a second PTMG). Is. The range of the second PTMG includes "a first PTMG (polytetramethylene ether having a number average molecular weight of 300 or more and 3500 or less, an average number of functional groups of 2 , and an average hydroxyl value of 35 mgKOH / g or more and 200 mgKOH / g or less". Glycol) ”and“ Polytetramethylene ether glycol in which at least one of the number average molecular weight, the average number of functional groups, and the average hydroxyl value is out of the range of conditions for falling under the first PTMG ”. included.

Claims (1)

ポリオール成分、ポリイソシアネート成分、フィラー、発泡剤、触媒、整泡剤を含むポリウレタン原料からなるポリウレタンフォームであって、
前記ポリオール成分が、数平均分子量が300以上3500以下、平均官能基数が2、及び平均水酸基価が35mgKOH/g以上200mgKOH/g以下のポリテトラメチレンエーテルグリコールを含み、
前記フィラーが、比重0.25g/cm以上1.0g/cm未満であり、
JIS K 7222に準拠して測定されたポリウレタンフォームの密度が0.25g/cm以上0.35g/cm以下であり、
JIS K 7312に準拠し、アスカーゴム硬度計C型を用いて測定されたポリウレタンフォームの硬度が50以上65以下であり、
耐屈曲性を備えたことを特徴とするポリウレタンフォーム。
A polyurethane foam made of a polyurethane raw material containing a polyol component, a polyisocyanate component, a filler, a foaming agent, a catalyst, and a foam stabilizer.
The polyol component contains polytetramethylene ether glycol having a number average molecular weight of 300 or more and 3500 or less, an average number of functional groups of 2, and an average hydroxyl value of 35 mgKOH / g or more and 200 mgKOH / g or less.
The filler has a specific gravity of 0.25 g / cm 3 or more and less than 1.0 g / cm 3.
The density of polyurethane foam measured according to JIS K 7222 is 0.25 g / cm 3 or more and 0.35 g / cm 3 or less.
According to JIS K 7312, the hardness of the polyurethane foam measured using the Asker rubber hardness tester C type is 50 or more and 65 or less.
Polyurethane foam characterized by bending resistance.
JP2018086956A 2018-04-27 2018-04-27 Polyurethane foam Active JP7045257B2 (en)

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JP2019189804A5 true JP2019189804A5 (en) 2021-07-26
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JPWO2021193363A1 (en) * 2020-03-27 2021-09-30
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