JP6121062B2 - 熱可塑性エラストマー組成物およびその製造方法 - Google Patents
熱可塑性エラストマー組成物およびその製造方法 Download PDFInfo
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- JP6121062B2 JP6121062B2 JP2016544493A JP2016544493A JP6121062B2 JP 6121062 B2 JP6121062 B2 JP 6121062B2 JP 2016544493 A JP2016544493 A JP 2016544493A JP 2016544493 A JP2016544493 A JP 2016544493A JP 6121062 B2 JP6121062 B2 JP 6121062B2
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- thermoplastic elastomer
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
- 150000005671 trienes Chemical class 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
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Description
エチレン・α−オレフィン・非共役ポリエン共重合体(A)と、
ポリオレフィン樹脂(B)と、
前記共重合体(A)と樹脂(B)との合計100質量部あたり1〜200質量部の軟化剤(C)と、
架橋剤(D)とを、
バッチ式ミキサーを用い、下記条件(1)〜(4)を満たす条件下で動的架橋して得られる。
(1) 50≦P1≦300
(ここで、P1は下記式(i)で定義される。
(2) 900≦P2≦1450
(ここで、P2は下記式(ii)で定義される。
(3) −2.5≦P3≦ 1.5
(ここで、P3は下記式(iii)で定義される。
(4)バッチ式ミキサーに、エチレン・α−オレフィン・非共役ポリエン共重合体(A)、ポリオレフィン樹脂(B)および軟化剤(C)を投入した後に架橋剤(D)を投入する。
エチレン・α−オレフィン・非共役ポリエン共重合体(A)と、
ポリオレフィン樹脂(B)と、
前記共重合体(A)と樹脂(B)との合計100質量部あたり1〜200質量部の軟化剤(C)と、
架橋剤(D)とを、
バッチ式ミキサーを用い、下記条件(1)〜(4)を満たす条件下で動的架橋する。
(1) 50≦P1≦300
(ここで、P1は下記式(i)で定義される。
(2) 900≦P2≦1450
(ここで、P2は下記式(ii)で定義される。
(3) −2.5≦P3≦1.5
(ここで、P3は下記式(iii)で定義される。
(4)バッチ式ミキサーに、エチレン・α−オレフィン・非共役ポリエン共重合体(A)、ポリオレフィン樹脂(B)および軟化剤(C)を投入した後に架橋剤(D)を投入する。
本発明の熱可塑性エラストマー組成物は、
エチレン・α−オレフィン・非共役ポリエン共重合体(A)と、
ポリオレフィン樹脂(B)と、
前記共重合体(A)と樹脂(B)との合計100質量部あたり1〜200質量部の軟化剤(C)と、
架橋剤(D)とを、
バッチ式ミキサーを用い、下記条件(1)〜(4)を満たす条件下で動的架橋して得られる。
このような噛合式ロータを有するバッチ型密閉式混練装置としては、たとえば、Harburg−Freudenberger Maschinenbau GmbH社製のIntermeshing Mixer(インターメッシングミキサー)を挙げることができる。
ここで、P1は下記式(i)で定義される。
ここで、P2は下記式(ii)で定義される。
ここで、P3は下記式(iii)で定義される。
[物性測定]
〔メルトフローレート(MFR)〕
メルトフローレートは、ASTM D1238に準拠し、230℃、10kg荷重下で測定した。
熱可塑性エラストマー組成物を210℃でプレス成形して、縦200mm、横200mm、厚さ2mmのプレスシートを作製し、このプレスシートを打ち抜いてダンベル状(JIS−3号)試験片を作製した。JIS K6251(2010)に準拠して、この試験片を用いて引張速度500mm/minで引張り強さ(TB)および伸び(EB)を測定した。
熱可塑性エラストマー組成物からプレス成形機により作製したプレス成形シートを、JIS K6262に準拠して、スペーサーを用いて25%圧縮し、70℃で24時間熱処理を行い、処理後23℃の恒温室で30分放置した後、厚さを測定し、下記式から圧縮永久歪(CS)を求めた。
CS=[(t0−t1)/(t0−t2)]×100
CS:圧縮永久歪み率(%)
t0:プレス成形シートの原厚(mm)
t1: 30分放置した後のプレス成形シートの厚さ(mm)
t2:圧縮ひずみを加えた状態でのプレス成形シートの厚さ(mm)
〔Δ溶融密度〕
熱可塑性エラストマー組成物を、JIS K6262に準拠して、200℃で溶融密度を測定し、23℃での密度を用いて、以下の式でΔ溶融密度(200℃)を算出した。
熱可塑性エラストマー組成物を、開口部に25mm×1mmのダイスを取り付けた、スクリュー径が50mm、L/Dが31、圧縮比が3.1であるフルフライト型スクリューを有する1軸押し出し機に供給し、前記押し出し機の導入部からダイス出口までの設定温度を160℃〜200℃として、熱可塑性エラストマーを36秒間押し出し、押し出された組成物の重量より1時間当たりの押出量を計算した。
上記押出量の試験において押し出し機から押し出された平板ベルトの成形品表面に現れた直径0.8mm以上の突起の数を成形品の長さ1m当りで計測し、その個数で成形体の外観を評価した。
エチレン・α−オレフィン・非共役ポリエン共重合体ゴム(EPDM)(商品名:三井EPT 3072EPM(三井化学(株)製))78質量部、結晶性ポリオレフィン系樹脂(PP−1)(商品名:EL−Pro P740J(SCG Chemicals製))22質量部及び結晶性ポリオレフィン系樹脂(PP−2)(商品名:ポリプロピレン樹脂B241(プライムポリマー(株)製))15質量部をインターメッシングミキサー(harburg-Freudenberger Maschinenbau GmbH社製、INTERMIX(登録商標) GK45E)に投入し、混練しながら室温から175℃まで昇温し、樹脂・ゴム組成物を調製した。
[実施例2]
有機過酸化物系架橋剤として、パーヘキサ25Bに替えてパーヘキシン25B(商品名、日油(株)製)を用いたこと以外は、実施例1と同様の条件で、熱可塑性エラストマー組成物を得た。このときのP3は−1.6であった。
[比較例1]
実施例1と同様に樹脂・ゴム組成物を調製した。
[比較例2〜7]
パラメーターP1, P2, P3が表1に示した数値になるように混練条件を変更したこと以外は実施例1と同様の配合、条件にて熱可塑性エラストマーを得た。
Claims (4)
- エチレン・α−オレフィン・非共役ポリエン共重合体(A)と、
ポリオレフィン樹脂(B)と、
前記共重合体(A)と樹脂(B)との合計100質量部あたり1〜200質量部の軟化剤(C)と、
架橋剤(D)とを、
バッチ式ミキサーを用い、下記条件(1)〜(4)を満たす条件下で動的架橋することを特徴とする、熱可塑性エラストマー組成物の製造方法。
(1) 50≦P1≦300
(ここで、P1は下記式(i)で定義される。
(2) 900≦P2≦1450
(ここで、P2は下記式(ii)で定義される。
(3) −2.5≦P3≦1.5
(ここで、P3は下記式(iii)で定義される。
(4)バッチ式ミキサーに、エチレン・α−オレフィン・非共役ポリエン共重合体(A)、ポリオレフィン樹脂(B)および軟化剤(C)を投入した後に架橋剤(D)を投入する。 - 前記エチレン・α−オレフィン・非共役ポリエン共重合体(A)と、ポリオレフィン樹脂(B)との質量比((A)/(B))が90/10〜10/90であることを特徴とする、請求項1に記載の熱可塑性エラストマー組成物の製造方法。
- 前記架橋剤(D)が有機過酸化物であり、かつ、前記架橋剤(D)の配合量が前記共重合体(A)と樹脂(B)との合計100質量部あたり0.01〜3.0質量部であることを特徴とする、請求項1または2に記載の熱可塑性エラストマー組成物の製造方法。
- 前記バッチ式ミキサーがIntermeshing Mixerであることを特徴とする、請求項1〜3のいずれかに記載の熱可塑性エラストマー組成物の製造方法。
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