JPS6330937B2 - - Google Patents
Info
- Publication number
- JPS6330937B2 JPS6330937B2 JP7630882A JP7630882A JPS6330937B2 JP S6330937 B2 JPS6330937 B2 JP S6330937B2 JP 7630882 A JP7630882 A JP 7630882A JP 7630882 A JP7630882 A JP 7630882A JP S6330937 B2 JPS6330937 B2 JP S6330937B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- ethylene
- polymer
- propylene
- 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
Links
- -1 aromatic vinyl compound Chemical class 0.000 claims description 28
- 229920001971 elastomer Polymers 0.000 claims description 22
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 15
- 229920000098 polyolefin Polymers 0.000 claims description 12
- 239000004711 α-olefin Substances 0.000 claims description 10
- 239000003431 cross linking reagent Substances 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000010559 graft polymerization reaction Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 14
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- 229920001155 polypropylene Polymers 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 150000001993 dienes Chemical class 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- VYXHVRARDIDEHS-QGTKBVGQSA-N (1z,5z)-cycloocta-1,5-diene Chemical compound C\1C\C=C/CC\C=C/1 VYXHVRARDIDEHS-QGTKBVGQSA-N 0.000 description 2
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
- RYPKRALMXUUNKS-UHFFFAOYSA-N 2-Hexene Natural products CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- 229920001893 acrylonitrile styrene Polymers 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- ZQMIGQNCOMNODD-UHFFFAOYSA-N diacetyl peroxide Chemical compound CC(=O)OOC(C)=O ZQMIGQNCOMNODD-UHFFFAOYSA-N 0.000 description 2
- 239000012933 diacyl peroxide Substances 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- DPUXQWOMYBMHRN-UHFFFAOYSA-N hexa-2,3-diene Chemical compound CCC=C=CC DPUXQWOMYBMHRN-UHFFFAOYSA-N 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- XHAFIUUYXQFJEW-UHFFFAOYSA-N 1-chloroethenylbenzene Chemical compound ClC(=C)C1=CC=CC=C1 XHAFIUUYXQFJEW-UHFFFAOYSA-N 0.000 description 1
- BTOVVHWKPVSLBI-UHFFFAOYSA-N 2-methylprop-1-enylbenzene Chemical compound CC(C)=CC1=CC=CC=C1 BTOVVHWKPVSLBI-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- GYZVXZFJARZDRY-UHFFFAOYSA-N ClCCCl.C=CC#N Chemical compound ClCCCl.C=CC#N GYZVXZFJARZDRY-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、寸法安定性、塗装性、耐候性ならび
に耐熱劣化性に優れるエラストマー組成物に関す
るものである。
近年、エチレン―プロピレン系ゴムとα―オレ
フイン重合体とを架橋剤により部分架橋した組成
物が開発されている。この組成物は従来のポリプ
ロピレン、ポリスチレン等の熱可塑性樹脂と異な
りゴム弾性を有するエラストマー組成物であり、
さらには耐候性にも優れた組成物であるため広範
な用途が期待されている。
しかしながら、この組成物は一般の熱可塑性樹
脂に比べ著しく寸法安定性が悪く（成形収縮率
大）成形品外観、特にヒケ、ソリの現象が目立
つ、また塗装性に劣るといつた重大な欠点を有し
ている。
本発明者等は、かかる問題点に鑑み、寸法安定
性ならびに塗装性に優れるエラストマー組成物に
つき鋭意研究した結果、エチレン―プロピレン系
ゴムとα―オレフイン重合体との部分架橋物(A)と
エチレン―プロピレン系ゴムをベースとするグラ
フト重合体(B)とを混合することにより、優れた組
成物が得られることを見出し本発明に到達したも
のである。
即ち、本発明は、エチレン―プロピレン系ゴム
（ａ−１）10〜90重量部およびα―オレフイン重
合体（ａ−２）90〜10重量部とをエチレン―プロ
ピレン系ゴム（ａ−１）とα―オレフイン重合体
（ａ−２）の総量100重量部当り0.01〜５重量部の
架橋剤の存在下、加熱および／または機械的混合
することにより得られる部分架橋物(A)20〜80重量
％とエチレン―プロピレン系ゴム（ｂ−１）５〜
60重量％に芳香族ビニル化合物55〜85重量％、シ
アン化ビニル化合物および／または不飽和カルボ
ン酸アルキルエステル化合物45〜15重量％からな
る化合物（ｂ−２）95〜40重量％をグラフト重合
して得られた重合体(B)80〜20重量％からなる寸法
安定性、塗装性、耐候性ならびに耐熱劣化性に優
れるエラストマー組成物を提供するものである。
本発明における部分架橋物(A)とは、エチレン―
プロピレン系ゴム（ａ−１）10〜90重量部および
α―オレフイン重合体（ａ−２）90〜10重量部と
をエチレン―プロピレン系ゴム（ａ−１）とα―
オレフイン重合体（ａ−２）の総量100重量部当
り0.01〜５重量部の架橋剤の存在下、加熱およ
び／または機械的混合することに得られたもので
ある。
部分架橋物(A)を構成するエチレン―プロピレン
系ゴム（ａ−１）とは、エチレンおよびプロピレ
ンのみからなるエチレン―プロピレンゴムだけで
なく、これに第３成分として非共役ジエン、たと
えばジシクロペンタジエン、エチリデンノルボル
ネン、1.4―ヘキサジエン、1.5―ヘキサジエン、
1.4シクロヘプタジエン、1.5―シクロオクタジエ
ン等およびこれらの混合物などを含むエチレン―
プロピレン―非共役ジエンターポリマーも含むも
のである。
α―オレフイン重合体としては、ポリプロピレ
ン、エチレン―プロピレンブロツク重合体、アタ
クチツク成分を含む低結晶性ポリプロピレン等が
挙げられ、ポリプロピレンが好ましい。
架橋剤としては、ジアセチルパーオキサイド、
ジベンゾイルパーオキサイド等の芳香族ジアシル
パーオキサイド、脂肪族ジアシルパーオキサイ
ド、二塩基性酸パーオキサイド、ケトンパーオキ
サイド、アルキルパーオキシエステル、アルキル
ハイドロパーオキサイド等が挙げられる。
部分架橋物(A)におけるエチレン―プロピレン系
ゴム（ａ−１）とα―オレフイン重合体（ａ−
２）との組成比はエチレン―プロピレン系ゴム
（ａ−１）10〜90重量部およびα―オレフイン重
合体（ａ−２）90〜10重量部であり、好ましくは
エチレン―プロピレン系ゴム（ａ−１）50〜80重
量部およびα―オレフイン重合体（ａ−２）50〜
20重量部である。
又、架橋剤の使用量は、エチレン―プロピレン
系ゴム（ａ−１）とα―オレフイン重合体（ａ−
２）の総量100重量部当り0.01〜５重量部であり、
好ましくは0.1〜１重量部である。
また、重合体(B)を構成するエチレン―プロピレ
ン系ゴム（ｂ−１）としてはエチレンおよびプロ
ピレンのみからなるエチレン―プロピレンゴムだ
けでなく、これに第３成分として、たとえばジシ
クロペンタジエン、エチリデンノルボルネン、
1.4―ヘキサジエン、1.5―ヘキサジエン、1.4―シ
クロヘプタジエン、1.5―シクロオクタジエン等
およびこれらの混合物などを含むエチレン―プロ
ピレン―ポリマーも含むものである。
ゴム共重合体中のエチレンとプロピレンのモル
比は５：１〜１：３の範囲であることが好まし
い。また、エチレン―プロピレンターポリマーの
場合の不飽和基の割合はヨウ素価４〜50の範囲で
あるものが好ましい。
芳香族ビニル化合物としては、スチレン、α―
メチルスチレン、α―クロルスチレン、ジメチル
スチレンなどが挙げられ、スチレンが好ましい。
シアン化ビニル化合物としては、アクリロニト
リル、メタアクリロニトリルなどが挙げられ、ア
クリロニトリルが好ましい。
不飽和カルボン酸アルキルエステル化合物とし
ては、メチル、エチル、プロピル、ブチル、ベン
ジル、ヘキシルなどの（メタ）アクリル酸エステ
ル化合物が挙げられ、メタクリル酸メチルが好ま
しい。
これら重合体(B)を構成する化合物（ｂ−２）
は、芳香族ビニル化合物55〜85重量％、シアン化
ビニル化合物および／または不飽和カルボン酸ア
ルキルエステル化合物45〜15重量％からなり、特
に、芳香族ビニル化合物60〜80重量％およびシア
ン化ビニル化合物40〜20重量％であることが好ま
しい、また、かかる化合物（ｂ−２）とゴム（ｂ
−１）との重量比は、化合物（ｂ−２）95〜40重
量％およびゴム（ｂ−１）５〜60重量％である。
重合体(B)は塊状重合法、乳化重合法、溶液重合
法、懸濁重合法等により製造される。
本発明のエラストマー組成物は、部分架橋物(A)
20〜80重量％と重合体(B)80〜20重量％からなる。
部分架橋物(A)が20重量％未満の場合は、ゴム弾性
を殆んど示さず、エラストマーというより硬質の
樹脂組成物に近くなり、エラストマーとしての特
徴を失う。一方、80重量％を越す場合は、寸法安
定性および塗装性は改善されない。
本発明のエラストマー組成物は、200％以上の
伸び率（ASTM―D638）を有する。
部分架橋物(A)と重合体(B)との混合は、バンバリ
ーミキサー、押出機等の公知の方法で行なうこと
ができる。また混合時に安定剤、可塑剤、帯電防
止剤、滑剤、染顔料、充填剤等の添加剤、さらに
は耐候性、耐熱劣化性に影響を与えない範囲で、
AS（アクリロニトリル―スチレン）樹脂、MS
（メチルメタアクリレート―スチレン）樹脂、
ABS樹脂、MBS樹脂等を添加することも可能で
ある。
以下に本発明を実施例により詳細に説明する。
実施例ならびに比較例
表―１に示す配合比率に基づき、部分架橋物(A)
と重合体(B)とをバンバリーミキサーにて混合し、
各種試験片を作成した。得られた組成物の物性を
表―１に示す。
本実施例ならびに比較例において用いられた部
分架橋物(A)、重合体(B)、は以下の方法により作ら
れた。
なお、試料番号６においては、架橋剤を用いず
単にエチレン―プロピレン系ゴム（エチレン―プ
ロピレン―エチリデンノルボルネンゴム）70重量
部とポリオレフイン（ポリプロピレン）30重量部
を混合した未架橋物を用いた。
部分架橋物(A)―１
エチレン―プロピレン―エチリデンノルボルネ
ンゴム70重量部とポリプロピレン30重量部を架橋
剤（ジクミルパーオキサイド）0.6重量部の存在
下、バンバリーミキサーで180℃約７分間混練し、
部分架橋物を得た。
エチレン―プロピレン―エチリデンノルボルネ
ンゴム80重量部とポリプロピレン20重量部を架橋
剤（ジクミルパーオキサイド）0.4重量部の存在
下、バンバリーミキサーで180℃、約７分間混練
し、部分架橋物を得た。
Γ重合体(B)―１
ヨウ素価8.5、ムーニー粘度61、プロピレン含
有率46重量％、ジエン成分としてエチリデンノル
ボルネンを含むエチレン―プロピレンゴム300重
量部をｎ―ヘキサン2000重量部および二塩化エチ
レン1500重量部に溶解し、アクリロニトリル300
重量部、スチレン700重量部および過酸化ベンゾ
イル10重量部を仕込んだ後、67℃で10時間窒素雰
囲気600r.p.mの撹拌下で重合した。
重合液を大過剰のメタノールと接触させ、折出
した沈澱物を分離乾燥後ゴム含有量28.2％の重合
体(B)―１を得た。
Γ重合体(B)―２
ゴム300重量部を400重量部に、アクリロニトリ
ル300重量部を200重量部に、またスチレン700重
量部を600重量部に変更した以外は重合体(B)―１
の処方に基づきゴム含有量33.3％のグラフト体を
得た。さらに別途製造されたスチレン―アクリロ
ニトリル共重合体（スチレン70重量％）と混合
し、ゴム含有量28.2％の重合体(B)―２を得た。
The present invention relates to an elastomer composition that has excellent dimensional stability, paintability, weather resistance, and heat deterioration resistance. In recent years, compositions in which ethylene-propylene rubber and α-olefin polymer are partially crosslinked with a crosslinking agent have been developed. This composition is an elastomer composition that has rubber elasticity, unlike conventional thermoplastic resins such as polypropylene and polystyrene.
Furthermore, since the composition has excellent weather resistance, it is expected to have a wide range of uses. However, this composition has serious drawbacks such as significantly poor dimensional stability (high mold shrinkage rate) compared to general thermoplastic resins, noticeable appearance of molded products, especially sink marks and warpage, and poor paintability. have. In view of these problems, the present inventors have conducted extensive research on elastomer compositions with excellent dimensional stability and paintability, and have found that a partially crosslinked product (A) of ethylene-propylene rubber and an -The present invention was achieved by discovering that an excellent composition can be obtained by mixing a propylene rubber-based graft polymer (B). That is, in the present invention, 10 to 90 parts by weight of ethylene-propylene rubber (a-1) and 90 to 10 parts by weight of α-olefin polymer (a-2) are combined with ethylene-propylene rubber (a-1). Partially crosslinked product (A) obtained by heating and/or mechanical mixing in the presence of 0.01 to 5 parts by weight of a crosslinking agent per 100 parts by weight of the total amount of α-olefin polymer (a-2) (20 to 80 parts by weight) % and ethylene-propylene rubber (b-1) 5~
Graft polymerization of 95 to 40% by weight of a compound (b-2) consisting of 55 to 85% by weight of an aromatic vinyl compound and 45 to 15% by weight of a vinyl cyanide compound and/or an unsaturated carboxylic acid alkyl ester compound to 60% by weight. The object of the present invention is to provide an elastomer composition comprising 80 to 20% by weight of the polymer (B) obtained by the method, which has excellent dimensional stability, paintability, weather resistance, and heat deterioration resistance. The partially crosslinked product (A) in the present invention refers to ethylene-
The ethylene-propylene rubber (a-1) and α-
It is obtained by heating and/or mechanical mixing in the presence of 0.01 to 5 parts by weight of a crosslinking agent per 100 parts by weight of the total amount of olefin polymer (a-2). The ethylene-propylene rubber (a-1) constituting the partially crosslinked product (A) is not only an ethylene-propylene rubber consisting only of ethylene and propylene, but also a non-conjugated diene, such as dicyclopentadiene, as a third component. , ethylidene norbornene, 1.4-hexadiene, 1.5-hexadiene,
Ethylene, including 1.4-cycloheptadiene, 1.5-cyclooctadiene, etc., and mixtures thereof, etc.
It also includes propylene-nonconjugated diene terpolymers. Examples of the α-olefin polymer include polypropylene, ethylene-propylene block polymer, and low crystallinity polypropylene containing an atactic component, with polypropylene being preferred. As a crosslinking agent, diacetyl peroxide,
Examples include aromatic diacyl peroxides such as dibenzoyl peroxide, aliphatic diacyl peroxides, dibasic acid peroxides, ketone peroxides, alkyl peroxy esters, and alkyl hydroperoxides. Ethylene-propylene rubber (a-1) and α-olefin polymer (a-
2) is 10 to 90 parts by weight of the ethylene-propylene rubber (a-1) and 90 to 10 parts by weight of the α-olefin polymer (a-2), preferably ethylene-propylene rubber (a-2). -1) 50 to 80 parts by weight and α-olefin polymer (a-2) 50 to 80 parts by weight
It is 20 parts by weight. In addition, the amount of crosslinking agent used is determined between ethylene-propylene rubber (a-1) and α-olefin polymer (a-1).
2) is 0.01 to 5 parts by weight per 100 parts by weight,
Preferably it is 0.1 to 1 part by weight. In addition, the ethylene-propylene rubber (b-1) constituting the polymer (B) is not only an ethylene-propylene rubber consisting only of ethylene and propylene, but also a third component such as dicyclopentadiene, ethylidenenorbornene, etc. ,
Also included are ethylene-propylene polymers including 1.4-hexadiene, 1.5-hexadiene, 1.4-cycloheptadiene, 1.5-cyclooctadiene, etc., and mixtures thereof. The molar ratio of ethylene to propylene in the rubber copolymer is preferably in the range of 5:1 to 1:3. Further, in the case of an ethylene-propylene terpolymer, the proportion of unsaturated groups preferably has an iodine value in the range of 4 to 50. Examples of aromatic vinyl compounds include styrene, α-
Examples include methylstyrene, α-chlorostyrene, dimethylstyrene, and styrene is preferred. Examples of the vinyl cyanide compound include acrylonitrile and methacrylonitrile, with acrylonitrile being preferred. Examples of the unsaturated carboxylic acid alkyl ester compound include (meth)acrylic ester compounds such as methyl, ethyl, propyl, butyl, benzyl, and hexyl, with methyl methacrylate being preferred. Compound (b-2) constituting these polymers (B)
consists of 55-85% by weight of an aromatic vinyl compound, 45-15% by weight of a vinyl cyanide compound and/or an unsaturated carboxylic acid alkyl ester compound, in particular 60-80% by weight of an aromatic vinyl compound and a vinyl cyanide compound. The amount of such compound (b-2) and rubber (b) is preferably 40 to 20% by weight.
-1) is 95 to 40% by weight of compound (b-2) and 5 to 60% by weight of rubber (b-1). The polymer (B) is produced by a bulk polymerization method, an emulsion polymerization method, a solution polymerization method, a suspension polymerization method, or the like. The elastomer composition of the present invention comprises a partially crosslinked product (A)
20 to 80% by weight and 80 to 20% by weight of polymer (B).
If the content of the partially crosslinked product (A) is less than 20% by weight, it exhibits almost no rubber elasticity, becomes more like a hard resin composition than an elastomer, and loses its characteristics as an elastomer. On the other hand, when it exceeds 80% by weight, dimensional stability and paintability are not improved. The elastomer composition of the present invention has an elongation (ASTM-D638) of 200% or more. The partially crosslinked product (A) and the polymer (B) can be mixed by a known method such as a Banbury mixer or an extruder. In addition, additives such as stabilizers, plasticizers, antistatic agents, lubricants, dyes and pigments, and fillers are added during mixing, as long as they do not affect weather resistance and heat deterioration resistance.
AS (acrylonitrile-styrene) resin, MS
(methyl methacrylate-styrene) resin,
It is also possible to add ABS resin, MBS resin, etc. The present invention will be explained in detail below using examples. Examples and Comparative Examples Based on the blending ratio shown in Table 1, partially crosslinked product (A)
and polymer (B) are mixed in a Banbury mixer,
Various test pieces were created. Table 1 shows the physical properties of the obtained composition. The partially crosslinked product (A) and polymer (B) used in the present examples and comparative examples were produced by the following method. In sample No. 6, an uncrosslinked product was used in which 70 parts by weight of ethylene-propylene rubber (ethylene-propylene-ethylidene norbornene rubber) and 30 parts by weight of polyolefin (polypropylene) were simply mixed without using a crosslinking agent. Partially crosslinked product (A)-1 70 parts by weight of ethylene-propylene-ethylidene norbornene rubber and 30 parts by weight of polypropylene were kneaded in a Banbury mixer at 180°C for about 7 minutes in the presence of 0.6 parts by weight of a crosslinking agent (dicumyl peroxide).
A partially crosslinked product was obtained. 80 parts by weight of ethylene-propylene-ethylidene norbornene rubber and 20 parts by weight of polypropylene were kneaded in a Banbury mixer at 180°C for about 7 minutes in the presence of 0.4 parts by weight of a crosslinking agent (dicumyl peroxide) to obtain a partially crosslinked product. Γ Polymer (B)-1 Iodine number 8.5, Mooney viscosity 61, propylene content 46% by weight, 300 parts by weight of ethylene-propylene rubber containing ethylidene norbornene as the diene component, 2000 parts by weight of n-hexane and 1500 parts by weight of ethylene dichloride Acrylonitrile dissolved in 300 parts
After charging 700 parts by weight of styrene and 10 parts by weight of benzoyl peroxide, polymerization was carried out at 67° C. for 10 hours under stirring at 600 rpm in a nitrogen atmosphere. The polymerization solution was brought into contact with a large excess of methanol, and the precipitate precipitated was separated and dried to obtain Polymer (B)-1 with a rubber content of 28.2%. Γ Polymer (B)-2 Polymer (B)-1 except that 300 parts by weight of rubber was changed to 400 parts by weight, 300 parts by weight of acrylonitrile was changed to 200 parts by weight, and 700 parts by weight of styrene was changed to 600 parts by weight.
A graft body with a rubber content of 33.3% was obtained based on the formulation. Furthermore, it was mixed with a separately manufactured styrene-acrylonitrile copolymer (styrene 70% by weight) to obtain polymer (B)-2 with a rubber content of 28.2%.
【表】【table】
【表】
※ ウレタン２液型塗料を使用し、密着強度の良好な
ものを○、不良なものを×と判定した。
[Table] *Using a two-component urethane paint, those with good adhesion strength were rated as ○, and those with poor adhesion strength were rated as ×.
Claims (1)
90重量部とα―オレフイン重合体（ａ−２）90〜
10重量部とをエチレン―プロピレン系ゴム（ａ−
１）とα―オレフイン重合体（ａ−２）の総量
100重量部当り0.01〜５重量部の架橋剤の存在下、
加熱および／または機械的混合することにより得
られる部分架橋物(A)20〜80重量％とエチレン―プ
ロピレン系ゴム（ｂ−１）５〜60重量％に芳香族
ビニル化合物55〜85重量％、シアン化ビニル化合
物および／または不飽和カルボン酸アルキルエス
テル化合物45〜15重量％からなる化合物（ｂ−
２）95〜40重量％をグラフト重合して得られた重
合体(B)80〜20重量％からなることを特徴とするエ
ラストマー組成物。1 Ethylene-propylene rubber (a-1) 10~
90 parts by weight and α-olefin polymer (a-2) 90~
10 parts by weight of ethylene-propylene rubber (a-
1) and the total amount of α-olefin polymer (a-2)
In the presence of 0.01 to 5 parts by weight of crosslinking agent per 100 parts by weight,
20 to 80% by weight of the partially crosslinked product (A) obtained by heating and/or mechanical mixing, 5 to 60% by weight of the ethylene-propylene rubber (b-1), and 55 to 85% by weight of the aromatic vinyl compound. A compound (b-
2) An elastomer composition comprising 80 to 20% by weight of a polymer (B) obtained by graft polymerization of 95 to 40% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7630882A JPS58191737A (en) | 1982-05-06 | 1982-05-06 | Elastomer composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7630882A JPS58191737A (en) | 1982-05-06 | 1982-05-06 | Elastomer composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58191737A JPS58191737A (en) | 1983-11-09 |
| JPS6330937B2 true JPS6330937B2 (en) | 1988-06-21 |
Family
ID=13601738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7630882A Granted JPS58191737A (en) | 1982-05-06 | 1982-05-06 | Elastomer composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58191737A (en) |
-
1982
- 1982-05-06 JP JP7630882A patent/JPS58191737A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58191737A (en) | 1983-11-09 |
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