JPH02120334A - Soft foaming resin composition for injection molding - Google Patents
Soft foaming resin composition for injection moldingInfo
- Publication number
- JPH02120334A JPH02120334A JP63270725A JP27072588A JPH02120334A JP H02120334 A JPH02120334 A JP H02120334A JP 63270725 A JP63270725 A JP 63270725A JP 27072588 A JP27072588 A JP 27072588A JP H02120334 A JPH02120334 A JP H02120334A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- pref
- injection molding
- rubber
- pts
- 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.)
- Granted
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 10
- 239000011342 resin composition Substances 0.000 title claims description 6
- 238000005187 foaming Methods 0.000 title description 5
- 229920001971 elastomer Polymers 0.000 claims abstract description 23
- 239000005060 rubber Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 239000004793 Polystyrene Substances 0.000 claims abstract description 7
- 229920002223 polystyrene Polymers 0.000 claims abstract description 7
- 229920001400 block copolymer Polymers 0.000 claims abstract description 6
- 229920000098 polyolefin Polymers 0.000 claims abstract description 6
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 6
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 5
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 3
- 239000006260 foam Substances 0.000 claims description 8
- -1 vinyl aromatic compound Chemical class 0.000 claims description 8
- 229920001195 polyisoprene Polymers 0.000 claims description 6
- 239000005062 Polybutadiene Substances 0.000 claims description 4
- 239000002666 chemical blowing agent Substances 0.000 claims description 4
- 229920002857 polybutadiene Polymers 0.000 claims description 4
- 238000000465 moulding Methods 0.000 abstract description 8
- 229920001684 low density polyethylene Polymers 0.000 abstract description 6
- 239000004702 low-density polyethylene Substances 0.000 abstract description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 abstract description 4
- 235000019399 azodicarbonamide Nutrition 0.000 abstract description 4
- 239000012188 paraffin wax Substances 0.000 abstract description 4
- 239000004156 Azodicarbonamide Substances 0.000 abstract description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004902 Softening Agent Substances 0.000 abstract description 3
- 239000004088 foaming agent Substances 0.000 abstract description 3
- 239000010734 process oil Substances 0.000 abstract description 3
- 150000001993 dienes Chemical class 0.000 abstract description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 abstract description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract 2
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 33
- 239000000203 mixture Substances 0.000 description 18
- 239000004604 Blowing Agent Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 10
- 239000000806 elastomer Substances 0.000 description 8
- 125000003118 aryl group Chemical group 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000010097 foam moulding Methods 0.000 description 6
- 210000004027 cell Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010422 painting Methods 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004040 coloring Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 229940057995 liquid paraffin Drugs 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 210000000497 foam cell Anatomy 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- VDXSNQANJUSVCE-UHFFFAOYSA-N 1-N,4-N-dinitrobenzene-1,4-dicarboxamide Chemical compound [N+](=O)([O-])NC(C1=CC=C(C(=O)N[N+](=O)[O-])C=C1)=O VDXSNQANJUSVCE-UHFFFAOYSA-N 0.000 description 1
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 241000283690 Bos taurus Species 0.000 description 1
- 229920004939 Cariflex™ Polymers 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229920002633 Kraton (polymer) Polymers 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- CAMXVZOXBADHNJ-UHFFFAOYSA-N ammonium nitrite Chemical compound [NH4+].[O-]N=O CAMXVZOXBADHNJ-UHFFFAOYSA-N 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229940021231 clearskin Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229920006038 crystalline resin Polymers 0.000 description 1
- UQLDLKMNUJERMK-UHFFFAOYSA-L di(octadecanoyloxy)lead Chemical compound [Pb+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O UQLDLKMNUJERMK-UHFFFAOYSA-L 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 1
- 229940046892 lead acetate Drugs 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- ALIFPGGMJDWMJH-UHFFFAOYSA-N n-phenyldiazenylaniline Chemical compound C=1C=CC=CC=1NN=NC1=CC=CC=C1 ALIFPGGMJDWMJH-UHFFFAOYSA-N 0.000 description 1
- 150000002832 nitroso derivatives Chemical class 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、風あい、柔軟性および耐熱性などを付与し
た射出成形に適した発泡樹脂組成物に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a foamed resin composition that is suitable for injection molding and has properties such as air, flexibility, and heat resistance.
［従来の技術および問題点］
近年、自動車内装部品、家電部品などの分野で成形加工
性に優れた熱可塑性エラストマーが注目されている。[Prior Art and Problems] In recent years, thermoplastic elastomers with excellent moldability have been attracting attention in the fields of automobile interior parts, home appliance parts, and the like.
これらの熱可塑性エラストマーとしては、現在、ポリオ
レフィン系、ポリウレタン系、ポリエステル系、ポリス
チレン系、ポリ塩化ビニル系などの種々のエラストマー
が開発され市販されている。As these thermoplastic elastomers, various elastomers such as polyolefin-based, polyurethane-based, polyester-based, polystyrene-based, and polyvinyl chloride-based elastomers have been developed and commercially available.
これらの中で、柔軟性、＃熱性のバランスからは、ポリ
スチレン系（ＳＩＳ 、ＳＢＳ 、５ＥＢＳ。Among these, polystyrene types (SIS, SBS, 5EBS) are preferred in terms of flexibility and thermal properties.
５ＥＰＳなど）エラストマーが特に良い、しかし、成形
加工性からみた場合は不十分であり、成形加工改良材を
添加する必要がある。この改良材の添加により、加工性
１機械的強度などは向上する。Elastomers (such as 5EPS) are particularly good, but are insufficient in terms of molding processability, and it is necessary to add a molding process improver. By adding this improving material, workability, mechanical strength, etc. are improved.
しかし、柔軟性は逆に低下する。これを防ぐためには、
ゴム用軟化剤を多量に添加して柔軟性を増大させている
のが現状である。However, flexibility decreases. To prevent this,
Currently, flexibility is increased by adding large amounts of rubber softeners.
これらの組成物は、例えば、特開昭５８−２０６６４４
号、同５８−２２２１４３号１回６０−８６１５４号、
同６１−２８５４８号などに記載されている。These compositions are described, for example, in JP-A-58-206644.
No. 58-222143, 1st issue No. 60-86154,
It is described in No. 61-28548.
これらの成形品は、柔軟性を確保す・る１］的で軟化剤
を多量に添加しているため、成形品へのブリードアウト
が激しく、これによりベトッキが激しくなり、顔料など
で着色して成形を行ない最終製品とした場合、この表面
のベトッキのため商品価値が失われる。また、成形品は
塗装してベトッキを無くしていたが、塗装する際におい
ても塗装性が悪く、経時後、塗料の密着性に問題があっ
た。These molded products contain a large amount of softening agent to ensure flexibility, so bleed-out into the molded product is severe, resulting in excessive stickiness and coloring with pigments. When molded into a final product, the product value is lost due to the sticky surface. In addition, molded products were painted to eliminate stickiness, but the paintability was poor, and there were problems with the adhesion of the paint over time.
成形性についても、このベトッキにより金型よりの離型
性が悪い、さらに、これらの成形品は柔軟性（硬さ）に
おいては問題がないが、感触（風あい）については十分
ではなく、柔軟性、感触の両者を求められる製品には使
用できない欠点がある。In terms of moldability, this sticky material has poor mold release properties from the mold.Furthermore, although these molded products have no problems with flexibility (hardness), they do not have sufficient feel (airiness), and are not flexible enough. It has the disadvantage that it cannot be used in products that require both quality and texture.
本発明者らは、上記の欠点を軟化剤の添加量を極力少な
くして、組成物の内部を発泡させることにより、従来の
軟化剤を多量に添加した組成物の未発泡品ｃ以下エラス
トマーソリンド系という）と回等の柔軟性を得ると同時
に、製品の表面への軟化剤のブリードおよび塗装性、ま
た成形性を改良した射出成形に適した組成物を（りるこ
とにある。The present inventors solved the above drawbacks by reducing the amount of softener added as much as possible and foaming the inside of the composition. The objective is to create a composition that is suitable for injection molding and has improved bleedability of the softener on the surface of the product, coating properties, and moldability, as well as flexibility such as rind type and moldability.
［課題を解決するための手段］
本発明は、上記の課題を、ポリスチレン系熱可塑性エラ
ストマー、改質材（加工性改良剤としてポリオレフィン
系樹脂、柔軟性付与剤として軟化剤）を配合して、射出
発泡成形可能な組成物を得ることにより解決した。[Means for Solving the Problems] The present invention solves the above problems by blending a polystyrene thermoplastic elastomer and a modifier (a polyolefin resin as a processability improver and a softener as a flexibility imparting agent). The solution was to obtain a composition that can be injection foam molded.
すなわち１本発明は、
（Ａ）末端にポリスチレンなどのビニル芳香族化合物の
ブロックを付し中間主鎖にポリブタジェン、ポリイソプ
レン類またはポリオレフィン類を有する熱可塑性ブロッ
ク共重合体である基幹ポリマー４０〜７０重量％
ＣＢ）ポリオレフィン系樹脂１０〜４０重Ｈ，ｔ％（Ｃ
）ゴム用軟化剤５〜２５重間％
（Ｄ）化学発泡剤 上記（Ａ） ＋ （Ｂ） ＋ （Ｃ
）１００１］′！量部に対して０．２〜３重１１部から
なる射出成形用軟質発泡樹脂組成物によって、上記欠点
を解決した。That is, 1 the present invention provides (A) a backbone polymer 40 to 70 which is a thermoplastic block copolymer having a block of a vinyl aromatic compound such as polystyrene at the end and having polybutadiene, polyisoprene, or polyolefin in the intermediate main chain; Weight % CB) Polyolefin resin 10-40 weight H, t% (C
) Rubber softener 5-25% by weight (D) Chemical blowing agent Above (A) + (B) + (C
)1001]'! The above-mentioned drawbacks were solved by a soft foam resin composition for injection molding consisting of 11 parts by weight of 0.2 to 3 parts.
本発明の特徴は、柔軟剤の添加量が少ないこと、また１
発泡させることにより、軟化剤のブリードが発泡セル中
に閉じ込められて表面上までは移行せず、ベトッキが軟
化剤添加量の割には押さえられる。The characteristics of the present invention are that the amount of softener added is small;
By foaming, the bleed of the softener is trapped in the foam cells and does not migrate to the surface, and the stickiness is suppressed relative to the amount of softener added.
さらに、射出発泡成形した際、表面が若干粗面となるこ
とにより、成形品と金型面との接触面積が減り、離型性
に関しては全く問題なくなる。しかも、このベトッキが
激減することにより、材ネ１ノ５色品での成形のｕｌ能
となり、塗装は特に必要ない。また、塗装を考えた場合
においても、塗装性や塗装−１の密着性などの問題は無
くなる。特に、射出発泡成形品は、エラストマーソリッ
ド系成形品に較べて感触が良く１合わせて、柔軟性であ
るところの二つの特性を満足させることができる。Furthermore, when injection foam molding is performed, the surface becomes slightly rough, which reduces the contact area between the molded product and the mold surface, and there is no problem with mold releasability. Furthermore, this drastic reduction in stickiness makes it possible to mold products with one material and five colors, and painting is not particularly necessary. Also, when considering painting, problems such as paintability and adhesion of Paint-1 are eliminated. In particular, injection foam molded products can satisfy the following two characteristics: 1) they have a better feel than elastomer solid molded products, and 1) they have flexibility.
本発明における成分（Ａ）の基幹ポリマーはＸ−Ｙ−Ｘ
タイプのブロック共重合体を指し、Ｘはポリスチレンに
代表されるビニル芳香族化合物のブロックで常温以上の
ガラス転移点を有し常温以下では物理的架橋点となりう
るブロックを表わＹはジエン類、その水惰物あるいはエ
チレン／ブチレンまたはエチレン／プロピレンなどから
なるポリオレフィン類がゴム相を形成するブロックを表
わす。The basic polymer of component (A) in the present invention is X-Y-X
type of block copolymer, where X represents a block of a vinyl aromatic compound represented by polystyrene, which has a glass transition point above room temperature and can become a physical crosslinking point below room temperature, and Y represents a diene, Polyolefins such as water-based products or ethylene/butylene or ethylene/propylene represent the blocks forming the rubber phase.
この）１（幹ポリマーの重量平均分子ＸＩ）は２５．０
００〜２２０．０００の範囲にあり、スチレン量は１０
〜４０％（重量）の範囲にあることが好ましい。This) 1 (weight average molecule XI of the backbone polymer) is 25.0
The range is from 00 to 220.000, and the amount of styrene is 10
It is preferably in the range of ~40% (by weight).
このようなミクロ的に二相形態をとる重合体として、例
えば、シェル化学■が１市している商品名「カリフレッ
クスＴＲ１１０７Ｊ （Ｙ成分ポリブタジェン）、［
カリフレックスＴＲＩＩＩＩＪ（Ｙ成分ポリイソプレン
）、日本合成ゴム■が１市している商品名ｒＳＩＳ−５
０００Ｊ （Ｙ成分ポリイソプレン）、日本ゼオン■
が１市している［フィンタック３４３５Ｊ （Ｙ成分
ポリイソプレン）などがあり、Ｙ成分がポリオレフィン
系としては、シェル化学四が１市している商品名「クレ
イトンＧ１６５２Ｊ （Ｙ成分エチレンーブチレンポ
リマー）などが挙げられる。これらのポリマーは単独で
配合してもよく、また１７４合系で用いても差支えない
、好ましくは、低硬度のＹ成分がポリイソプレンの基幹
ポリマーを混入する方がよい。Examples of such polymers that take a microscopically two-phase form include the product name "Califlex TR1107J (Y component polybutadiene)", which is marketed by Shell Chemical Co., Ltd.
CARIFLEX TRIIIJ (Y component polyisoprene), product name rSIS-5 manufactured by Japan Synthetic Rubber■
000J (Y component polyisoprene), Nippon Zeon■
There are products such as FinTac 3435J (Y component polyisoprene), which has a polyolefin Y component, such as Shell Chemical's product name "Krayton G1652J (Y component ethylene-butylene polymer)", which has one market. These polymers may be blended alone or may be used in a 174 mixture system.It is preferable that the low hardness Y component is mixed with the base polymer of polyisoprene.
配合量は、全配合量の４０〜７０重量％であり、好まし
くは５０〜７０重量％である。４０重量％以下では風あ
い、柔軟性が失われ、７０重量％をこえた配合では、機
械的性質が低下し、また、成形加工性にも問題が生じる
。The blending amount is 40 to 70% by weight, preferably 50 to 70% by weight of the total blending amount. If the content is less than 40% by weight, airiness and flexibility will be lost, and if it exceeds 70% by weight, mechanical properties will deteriorate and problems will arise in moldability.
本発明の成分（Ｂ）のポリオレフィン系樹脂は。The polyolefin resin as component (B) of the present invention is.
エチレン、プロピレン、ブテン−１，ペンテン−１，ヘ
キセン−１，４−メチルペンテン−１などのα−オレフ
ィンを常法により、単独または共重合の形で重合せしめ
て得られる結晶性樹脂である。It is a crystalline resin obtained by polymerizing α-olefins such as ethylene, propylene, butene-1, pentene-1, hexene-1,4-methylpentene-1, etc., either alone or in copolymerization, by a conventional method.
これらの内でも、成分（Ｂ）として特に好ましいものは
、結晶性プロピレン−エチレンランダムまたはブロック
共重合体、あるいは、高圧法低密度ポリエチレン（以下
ＬＤＰＥ）および直鎖状低密度ポリエチレン（以下Ｌ−
ＬＤＰＥ）である。Among these, particularly preferred as component (B) are crystalline propylene-ethylene random or block copolymers, high-pressure low density polyethylene (hereinafter referred to as LDPE) and linear low density polyethylene (hereinafter referred to as L-
LDPE).
これらのポリマーのＭＦＲ（メルトフローレート）は、
１〜１００ｇ７１０分（ＡＳＴＭ Ｄ−１２３８，２
３０℃、２．１６ｋｇ）で、好ましくは１０〜１００ｇ
７１０分である。ＭＦＲが１未満では、射出発泡成形の
際、細部への充填性に悪影響をおよぼし、ＭＦＲが１０
０以上では、押出機、ニーダ−などによる組成物造粒時
、剪断がかかりにくくポリマーの分散性が悪くなり、最
終的に発泡成形品中の微細気泡の維持が困難となる。The MFR (melt flow rate) of these polymers is
1-100g 710 minutes (ASTM D-1238,2
30°C, 2.16 kg), preferably 10 to 100 g
It is 710 minutes. If the MFR is less than 1, it will adversely affect the ability to fill details during injection foam molding, and the MFR will be less than 10.
If it is 0 or more, it is difficult to shear the composition during granulation using an extruder, kneader, etc., resulting in poor dispersibility of the polymer, and ultimately it becomes difficult to maintain fine cells in the foam molded product.
これらのポリマーは、単独または混合系で用いても差支
えない、配合量は、全配合量の１０〜４０重量％であり
、好ましくは１０〜３５重量％である。配合量が１０重
量％以下では、成形加工性に問題が生じ１機械的性質も
低下する。また４０重量％以上では、風あい、柔軟性が
失われる。These polymers may be used alone or in a mixed system, and the blending amount is 10 to 40% by weight, preferably 10 to 35% by weight of the total blending amount. If the blending amount is less than 10% by weight, problems will occur in moldability and mechanical properties will also decrease. Moreover, if it exceeds 40% by weight, the airflow and flexibility will be lost.
本発明における成分（Ｃ）のゴム用軟化剤は、非芳香族
系の鉱物油または液状もしくは低分子量の合成軟化剤が
適している。一般に、ゴムの軟化。As the rubber softener of component (C) in the present invention, a non-aromatic mineral oil or a liquid or low molecular weight synthetic softener is suitable. In general, softening of rubber.
増容、加工性向上に用いられるプロセスオイルまたは、
エクステングーオイルと呼ばれる鉱物系ゴム用軟化剤は
、芳香族環、ナフテン環およびパラフィン鎖の三者が組
合わさった混合物であって、パラフィン鎖の炭素数が全
炭素中５０％以上を占めるものがパラフィン系と呼ばれ
、ナフテンＪフ炭素数が３０〜４５％のものがナフテン
系、また、芳香族炭素数が３０％より多いものが芳香族
系とされる。Process oil used to increase volume and improve processability,
A mineral-based rubber softener called Extengo oil is a mixture of aromatic rings, naphthenic rings, and paraffin chains, where the number of carbon atoms in the paraffin chains accounts for 50% or more of the total carbon. It is called a paraffin type, and those having a naphthene carbon number of 30 to 45% are considered to be naphthene type, and those having more than 30% aromatic carbon number are considered to be aromatic type.
本発明で用いられる鉱物油系ゴム軟化剤は、上記の区分
でナフテン系およびパラフィン系のものが好ましい、芳
香族炭素数が３０％以上の芳香族系のものは、前記成分
（Ａ）との分散性の点で好ましくない、これらの非芳香
族系ゴム用軟化剤の性状は、９８．９℃における動粘度
が２〜４０ａｓｋ 、流動点が−１０〜−３５℃、およ
び引火点が１７０〜３００℃を示す。The mineral oil-based rubber softener used in the present invention is preferably a naphthenic or paraffinic one in the above categories.Aromatic ones with an aromatic carbon number of 30% or more are preferred in combination with the component (A). The properties of these non-aromatic rubber softeners, which are unfavorable in terms of dispersibility, include a kinematic viscosity at 98.9°C of 2 to 40 ask, a pour point of -10 to -35°C, and a flash point of 170 to -35°C. Indicates 300°C.
合成軟化剤としては、ポリブテン、低分子量ポリブタジ
ェンなどが使用可能であるが、上記鉱物油系ゴム用軟化
剤の方が良好な結果を与える。As the synthetic softener, polybutene, low molecular weight polybutadiene, etc. can be used, but the above-mentioned mineral oil-based softeners for rubber give better results.
このゴム用軟化剤の配合には、全配合７ｉｊの５〜２５
重社％であり、好ましくは５〜２０屯量％である。５ｊ
ｌｌＩ）％以下では、風あい１柔軟性の面で全く効果は
表われず、２５重量％以」−では１機械的性質が低下し
、また軟化剤のブリードアウトが生じる。In the formulation of this rubber softener, 5 to 25 of the total formulation 7ij
%, preferably 5 to 20 tonne %. 5j
If it is less than 11% by weight, no effect will be seen in terms of wind resistance and flexibility, and if it is more than 25% by weight, the mechanical properties will deteriorate and the softener will bleed out.
本発明における成分（Ｄ）の化学発泡剤は、無機系また
は有機系の分解型発泡剤の何れでもよい。The chemical blowing agent as component (D) in the present invention may be either an inorganic or an organic decomposable blowing agent.
無機系分解型発泡剤には１重炭酸ナトリウム、炭酸アン
モニウム、亜硝酸アンモニウム、ホウ水素化ナトリウム
などが挙げられる。有機系分解型発泡剤としては、アゾ
ジカルボンアミド、アゾビスホルムアミド、イソブチロ
ニトリル、ジアゾアミノベンゼンなどのアジド化合物、
Ｎ、Ｎ’ −’；ニトロソ・ペンタメチレンテトラ
ミン、 Ｎ、Ｎ’−ジメチル、 Ｎ、Ｎ’−ジニト
ロテレフタルアミドなどのニトロソ化合物などが挙げら
れる。さらに、これらの発泡剤の分解助剤として、一般
に知られている無機系のステアリン酸１１１Ｅ鉛、醋酸
Ｉ＋＋１鉛など、 ｌｆ機系のグリセリン、ジエチレ
ングリコールなと、および混合系で用いてもよい、また
、有機系発泡剤、無機系発泡剤の混合系を用いてもよい
。Examples of inorganic decomposable blowing agents include sodium bicarbonate, ammonium carbonate, ammonium nitrite, and sodium borohydride. Examples of organic decomposable blowing agents include azide compounds such as azodicarbonamide, azobisformamide, isobutyronitrile, and diazoaminobenzene;
N,N'-': Nitroso compounds such as nitroso-pentamethylenetetramine, N,N'-dimethyl, N,N'-dinitroterephthalamide, and the like. Furthermore, as decomposition aids for these blowing agents, commonly known inorganic lead stearate 111E, lead acetate I++1, etc., lf organic glycerin, diethylene glycol, etc. may be used in a mixed system, and A mixed system of , an organic blowing agent, and an inorganic blowing agent may be used.
表面状態、発泡セルの均一性の両者を満足させるには、
有機系／無機系発泡剤の混合系が好ましい、特に、有機
系発泡剤としては永和化成輛が１市している商品名「ビ
ニホールＡＣ＃３Ｊ 、 ｊ−機系発泡剤としては三菱
油化■が１市しているホＩｊ品名「ハイドロセロールコ
ンパウン向の混合系が好ましい。In order to satisfy both the surface condition and the uniformity of the foam cells,
A mixed system of organic/inorganic blowing agents is preferred.In particular, the organic blowing agent is Eiwa Kasei's product name ``Vinihole AC#3J'', and the J-organic blowing agent is Mitsubishi Yuka ■. A mixed system suitable for hydrocerol compounds is preferred.
これらの分解型発泡剤の使用量は、成分（Ａ）＋（ｎ）
＋（Ｃ）１０１）東！４部に夕４Ｌ−（，０，２〜３重
量部であり、好ましくは０．５〜２重量部である。０．
２重量部以下では、発泡倍率が低いため、風あい、柔軟
性が得られず、３ｇＸ量部以上では、独立セルが形成さ
れず連続セルとなり、機械的性質が著しく低下し、さら
に、成形品の表面状態が悪くなる。The amount of these decomposable blowing agents used is Component (A) + (n)
+(C)101) East! 0.2 to 3 parts by weight, preferably 0.5 to 2 parts by weight.
If it is less than 2 parts by weight, the foaming ratio is low, so airiness and flexibility cannot be obtained, and if it is more than 3 g× parts by weight, closed cells will not be formed but will become continuous cells, and the mechanical properties will be significantly reduced, and the molded product surface condition deteriorates.
上記成分（Ａ）、（Ｂ）、（Ｃ）および（Ｄ）からなる
射出成形用軟質発泡樹脂組成物を調製するには１例えば
、単軸押出機、二軸押出機、バンバリー型インターナル
ミキサー、各種ニーダ−などの−射的な溶融混練機を用
いる方法が採用できる。To prepare a soft foam resin composition for injection molding consisting of the above components (A), (B), (C) and (D) 1 For example, a single screw extruder, a twin screw extruder, a Banbury type internal mixer , a method using a shot-like melt kneader such as various kneaders can be adopted.
成分（Ｄ）の添加方法についゴー（ｊ、（Ａ）。Go (j, (A)) regarding the method of adding component (D).
ＣＢ）および（Ｃ）成分によりなる組成物を」−足温練
機による調製造粒後、伸展油（流動パラフィンなど）を
介して、化学発泡剤をトライブレンドして射出成形用軟
質発泡樹脂組成物とすることもできる。A composition consisting of components CB) and (C) is prepared into granules using a foot kneader, and then triblended with a chemical blowing agent via an extender oil (liquid paraffin, etc.) to form a soft foam resin composition for injection molding. It can also be a thing.
上記成分（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）以外に、必要
に応じて各種の添加剤１例えば、酸化防止剤、滑剤２着
色剤、紫外線吸収剤、帯電防止剤。In addition to the above-mentioned components (A), (B), (C), and (D), various additives (1) such as antioxidants, lubricants (2), colorants, ultraviolet absorbers, and antistatic agents may be added as necessary.
分散剤、銅害防止剤などを添加することもできる。A dispersant, a copper damage inhibitor, etc. can also be added.
［実施例］
本発明を実施例によってさらに詳細に説明するが、本発
明がこれらの実施例により限定されるものではない、な
お、これらの実施例および比較例において、射出発泡成
形条件および試験法は以下のとおりである。[Example] The present invention will be explained in more detail by Examples, but the present invention is not limited to these Examples. In these Examples and Comparative Examples, injection foam molding conditions and test methods is as follows.
肚匿＆漁處展条件
成形機；シャットオフノズルを有するスクリューインラ
イン射出成形機
（ＵＢＥ ＭＡＸ Ｄ１５０−１０）シリンダー温
度、２２０’０（最高）
射出圧力；７００ｋｇ／ｃゴ
射出速度；４６ｃｍ’／秒
成形品形状；１６Ｘ１６ｃｍ ５ｍｍｔの発泡平板品
１６Ｘ１６ｃｍ ３ｍｍｔのエラ
ストマーンリット品
臥秩法
試験試料は上記成形品を用いた。Molding machine: Screw in-line injection molding machine with shut-off nozzle (UBE MAX D150-10) Cylinder temperature: 220'0 (maximum) Injection pressure: 700 kg/c Injection speed: 46 cm'/sec Shape of molded product: 16 x 16 cm, 5 mm thick foamed flat plate product, 16 x 16 cm, 3 mm thick elastomer lit product The above molded product was used as the test sample for the rectangular method test.
（１）硬度（度）
ＪＩＳ Ｋ６３０１ Ａタイプ
（２）引張強度（ｋｇ／ｃｒｒｆ）、伸度（％）ＪＩＳ
Ｋ６３０１ 試験片の作成は３弓形ダンベルを用
いた。(1) Hardness (degree) JIS K6301 A type (2) Tensile strength (kg/crrf), elongation (%) JIS
The K6301 test piece was prepared using three arched dumbbells.
（３）引裂強度（ｋｇ／ｃｍ″）
ＪＩＳ Ｋ６３０１ 試験片の作成はＢ形ダンベル
を用いた。(3) Tear strength (kg/cm'') JIS K6301 A type B dumbbell was used to prepare the test piece.
（４）圧縮永久歪（％） ＪＩＳ Ｋ６３０１ ７０℃×２２時間。(4) Compression set (%) JIS K6301 70℃ x 22 hours.
２５％変形後の全残率を求めた。試験片の作成は円形ダ
ンベルを用いた。The total remaining percentage after 25% deformation was determined. A circular dumbbell was used to create the test piece.
（５）発泡倍率
同一組成物による発泡成形品とエラストマーソリッド成
形品の水中置換法による比率で求めた。(5) Expansion ratio It was determined by the ratio of a foam molded product made of the same composition and an elastomer solid molded product by an underwater displacement method.
（６）成形品表面のベタツキ
成形直後の成形品を重ね合わせ、１０Ｏｇｒ／ｃｒｎ’
の荷重を加えて２３℃Ｘ６９ＲＨ％恒温室で２４０時間
放置後の、成形品の分離性で判定した。(6) Stickiness on the surface of the molded product. Overlap the molded products immediately after molding and
The molded product was judged by its separability after being left for 240 hours in a constant temperature room of 23° C. and 69 RH%.
（７）成形品の外観
表面平滑性、発泡剤によるフラッシュ、色ムラなどを目
視により判定した。(7) Appearance of the molded product Surface smoothness, flash caused by the foaming agent, color unevenness, etc. were visually evaluated.
（８）発泡セルの均一性
成形品の中央を切り出し、顕微鏡によりレルの均一性を
判定した。(8) Uniformity of foamed cells The center of the molded product was cut out, and the uniformity of the cells was determined using a microscope.
（９）塗装性能
成形後２４時間後に塗装を行ない１次の項目について塗
装性溌を評価した。(9) Paintability Painting was performed 24 hours after molding, and paintability was evaluated for the following items.
ｌ）ゴバン目テープ試験
塗装２４時間後、ＪＩＳ Ｄ０２０２に基づき、安全
カミソリ刃を使用して１０ｌｏＸｌｏを１００分割して
［１２ｍｍのセロテープにより面と直角方向に剥離し、
非剥敲数を測定した。l) Goban tape test After 24 hours of painting, 10loXlo was divided into 100 parts using a safety razor blade according to JIS D0202 [Peel off in the direction perpendicular to the surface with 12mm cellophane tape,
The number of unpeeled pieces was measured.
２）耐熱性試験
塗装品を、１００℃のギヤーオーブンに２４０時間放置
し、取り出し１時間後にゴバン目テープ試験を行なった
。2) Heat Resistance Test The coated product was left in a gear oven at 100° C. for 240 hours, and 1 hour after taking it out, a cross-cut tape test was conducted.
また、実施例および比較例で用いた各成分は次のとおり
である。Further, each component used in Examples and Comparative Examples is as follows.
或公ユＡ１
（Ａ−１）Ｅ１本合成ゴム社製 ５ＩＳ−５０００ブル
ツクフイ一ルド粘度；２５ｊｎｍ％トルエン溶液で１５
００ｃｐｓ （２５℃）（Ａ−２）シェル化学社製
ＫＲＡＴＯＮ Ｇ〜１６５２
ブルックフィールド粘度；２０ｉＴｕｔｔ％トルエン溶
液で５５０ｃｐｓ （２５℃）
或公Ｘ旦工
（Ｂ−１）宇部興産社製 ＬＤＰＥ Ｊ３５２４密度
０．９２４、ＭＦＲ９０ｇｒ／１０分（２３０℃、２．
１６ｋｇ以下同様）
（Ｂ−２）宇部興産社製
Ｌ−ＬＤＰＥ ＪＬ２５１６
密度０ 、９１６． ＭＦＲ４２ｇ ｒ／ ｌ ｌ）分
（Ｂ−３）宇部興産社製
プロピレンーエチレンランダノ、ハル合体Ｊ ３１５Ｇ
Ｙ
エチレン含量３％、ＭＦＲ１５ｇｒ／１０分成分■旦上
（Ｃ−１）ナフテン系ゴム軟化剤 富士興産社製７−／
：Ｉ−Ｊｌ／ＦＬＥＸ＃２０５ＯＮ動粘度９ 、４２ｃ
ｓｔ （９８、９℃）カーボンタイプ分析ＣＮ＝３９
．Ｏｉ量％ＣＰ＝５５．０％
（Ｃ−２）オレフィン系ゴム軟化剤 出光興産社製 ダ
イアナプロセスオイルＰＷ−９０切詰度１１．２５ｃｓ
ｔ （９８，９℃）カーボンタイプ分析ＣＮ ＝ ３９
、 Ｏ屯Ｉ７）％Ｃｐ＝５５．０％
戊公ユ旦Ｌ
（Ｄ−１）有機系発泡剤
水和化成社製 ビニホールＡＣ＃３
主成分：アゾジカーボンアミド
分子量＝１１６ 分解温度＝２０８°Ｃ発生ガス量＝
２００ｍｉ／ｇｒ（０°０，１気圧）
流動パラフィン小粒度＝１〜３５ル
真比重＝１．６５
（Ｄ−２）無機系発泡剤 三菱油化社製ハイドロセロー
ルコンパウンド
成分：重炭酸ナトリウム／クエン醜混合物分解温度＝１
６８〜２１０’Ｃ！
発生ガス量＝７９０ｃｃ／ｇｒ
平均粒径＝１００ＪＬ
実施例１〜６．比較例１〜６
上記成分を表１に示す割合に酸化防止剤、紫外線防止剤
および着色顔料を配合し、Ｖ型プレンダーで成分（Ｃ）
が成分（Ａ）に十分含浸するまで混合し、単軸混練機を
用いて１９０℃で混練造粒して組成物ペレットとした。A1 (A-1) E1 made by Synthetic Rubber Co., Ltd. 5IS-5000 Bruckfield viscosity: 15 in 25 nm% toluene solution
00cps (25℃) (A-2) KRATON G~1652 manufactured by Shell Chemical Co., Ltd. Brookfield viscosity; 550cps (25℃) in 20iTutt% toluene solution (B-1) LDPE J3524 manufactured by Ube Industries, Ltd. Density 0 .924, MFR90gr/10 minutes (230°C, 2.
(Same for 16 kg or less) (B-2) L-LDPE JL2516 manufactured by Ube Industries, Ltd. Density 0, 916. MFR42g r/l l) min (B-3) Ube Industries, Ltd. propylene-ethylene randano, hull combination J 315G
Y Ethylene content 3%, MFR 15gr/10 minutes Ingredient ■ Danjo (C-1) Naphthenic rubber softener Manufactured by Fuji Kosan Co., Ltd. 7-/
:I-Jl/FLEX#205ON kinematic viscosity 9, 42c
st (98, 9℃) Carbon type analysis CN=39
．． Oi amount % CP = 55.0% (C-2) Olefin rubber softener Diana Process Oil PW-90 manufactured by Idemitsu Kosan Co., Ltd. Cutting degree 11.25 cs
t (98,9℃) Carbon type analysis CN = 39
, Otun I7) %Cp=55.0% Bogong Yudan L (D-1) Organic blowing agent Vinyhole AC#3 manufactured by Hydration Kasei Co., Ltd. Main component: Azodicarbonamide Molecular weight = 116 Decomposition temperature = 208° Amount of C gas generated = 200 mi/gr (0° 0, 1 atm) Liquid paraffin small particle size = 1 to 35 l True specific gravity = 1.65 (D-2) Inorganic blowing agent Hydrocellol compound component manufactured by Mitsubishi Yuka Co., Ltd. : Sodium bicarbonate/citric ugliness mixture decomposition temperature = 1
68~210'C! Generated gas amount = 790 cc/gr Average particle size = 100 JL Examples 1 to 6. Comparative Examples 1 to 6 The above components were blended with an antioxidant, an ultraviolet inhibitor, and a coloring pigment in the proportions shown in Table 1, and component (C) was blended with a V-type blender.
The mixture was mixed until it was sufficiently impregnated with component (A), and then kneaded and granulated using a single-screw kneader at 190°C to obtain composition pellets.
このペレットに発泡剤の伸展油として流動パラフィン１
重量部を添加し、ブレンド後、表１に示した成分（Ｄ）
の発泡剤を添加ブレンドし、これを使用して上記条件で
射出発泡成形してテストピースを作成し、上記方法で各
種試験を行なった。この結果を表１−１および表１−２
に示す。Liquid paraffin is added to these pellets as an extension oil for the blowing agent.
After adding parts by weight and blending, the component (D) shown in Table 1
A blowing agent was added and blended, and test pieces were prepared by injection foam molding under the above conditions, and various tests were conducted using the above methods. The results are shown in Table 1-1 and Table 1-2.
Shown below.
（以下、余白）
［発明の効果］
本発明の組成物を射出発泡成形することにより、エラス
トマーソリッド系の射出成形品では得られない風あい、
柔軟性を有した成形品が得られる。(Hereinafter, blank spaces) [Effects of the Invention] By injection foam molding the composition of the present invention, it is possible to achieve texture, which cannot be obtained with elastomer solid injection molded products.
A molded article with flexibility can be obtained.
さらに、軟化剤のブリードアウトが生じにくいことによ
り、塗装性が良く、塗料の’Ｉｆ：）：性に関しても問
題がなくなる。また、ベトッキが無いために塗装の必要
性はなくなり、組成物を顔ｔ’＋で着色して成形するこ
とによって最終製品が得られる。経済的に非常に有利で
ある。成形性においても、エラストマーソリッド系の射
出成形では金型との離型性に問題があったが、本発明の
組成物では、粘着性が少ないことと発泡による多少の表
面の粗面化に木る効果で、全く成形性に問題がない、さ
らに、一般に行なわれている熱可塑性樹脂の射出発泡成
形条件で成形を行なってもはっきりとしたスキン層を形
成するため、成形品の型くづれがない。Furthermore, since the softener does not easily bleed out, the paintability is good and there are no problems with the 'If:): properties of the paint. Furthermore, since there is no stickiness, there is no need for painting, and the final product can be obtained by coloring the composition with t'+ and molding it. It is economically very advantageous. In terms of moldability, injection molding of elastomer solids has had problems with mold releasability from the mold, but the composition of the present invention has low adhesion and a slight surface roughness due to foaming. As a result, there is no problem with moldability at all, and even when molding is performed under the commonly used injection foam molding conditions for thermoplastic resins, a clear skin layer is formed, so the molded product does not lose its shape. do not have.
本発明の組成物を用いた成形品は、風あい、柔軟性が要
求される自動車内装部品、家電部品などへの利用に好適
である。Molded articles using the composition of the present invention are suitable for use in automobile interior parts, home appliance parts, etc., which require good airiness and flexibility.
手続補正書印力 昭和６３年１２月７３日Procedural amendment printing December 73, 1988
Claims (1)
合物のブロックを付し中間主鎖にポリブタジエン、ポリ
イソプレン類またはポリオレフィン類を有する熱可塑性
ブロック共重合体である基幹ポリマー４０〜７０重量％ （Ｂ）ポリオレフィン系樹脂１０〜４０重量％（Ｃ）ゴ
ム用軟化剤５〜２５重量％ （Ｄ）化学発泡剤上記（Ａ）＋（Ｂ）＋（Ｃ）１００重
量部に対して０．２〜３重量部 からなる射出成形用軟質発泡樹脂組成物。(1) (A) 40 to 70% by weight of the core polymer, which is a thermoplastic block copolymer with a block of a vinyl aromatic compound such as polystyrene at the end and polybutadiene, polyisoprene, or polyolefin in the intermediate main chain. B) Polyolefin resin 10 to 40% by weight (C) Rubber softener 5 to 25% by weight (D) Chemical blowing agent 0.2 to 100 parts by weight of the above (A) + (B) + (C) A soft foam resin composition for injection molding consisting of 3 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63270725A JPH0676504B2 (en) | 1988-10-28 | 1988-10-28 | Soft foamable resin composition for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63270725A JPH0676504B2 (en) | 1988-10-28 | 1988-10-28 | Soft foamable resin composition for injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02120334A true JPH02120334A (en) | 1990-05-08 |
| JPH0676504B2 JPH0676504B2 (en) | 1994-09-28 |
Family
ID=17490090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63270725A Expired - Lifetime JPH0676504B2 (en) | 1988-10-28 | 1988-10-28 | Soft foamable resin composition for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0676504B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050035A (en) * | 2006-08-25 | 2008-03-06 | Rengo Co Ltd | Packaging body with tool |
| JP2013028654A (en) * | 2011-07-26 | 2013-02-07 | Riken Technos Corp | Thermoplastic elastomer composition for expansion molding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61138642A (en) * | 1984-12-10 | 1986-06-26 | Nippon Erasutomaa Kk | Foamed direct sole |
| JPS61241332A (en) * | 1985-04-17 | 1986-10-27 | Dainippon Plastics Co Ltd | High-performance foam |
| JPS6219461A (en) * | 1985-07-19 | 1987-01-28 | Canon Inc | Ink jet recorder |
-
1988
- 1988-10-28 JP JP63270725A patent/JPH0676504B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61138642A (en) * | 1984-12-10 | 1986-06-26 | Nippon Erasutomaa Kk | Foamed direct sole |
| JPS61241332A (en) * | 1985-04-17 | 1986-10-27 | Dainippon Plastics Co Ltd | High-performance foam |
| JPS6219461A (en) * | 1985-07-19 | 1987-01-28 | Canon Inc | Ink jet recorder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050035A (en) * | 2006-08-25 | 2008-03-06 | Rengo Co Ltd | Packaging body with tool |
| JP2013028654A (en) * | 2011-07-26 | 2013-02-07 | Riken Technos Corp | Thermoplastic elastomer composition for expansion molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0676504B2 (en) | 1994-09-28 |
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