JPH01132649A - Resin composition for exterior furnishing of automobile - Google Patents
Resin composition for exterior furnishing of automobileInfo
- Publication number
- JPH01132649A JPH01132649A JP28850487A JP28850487A JPH01132649A JP H01132649 A JPH01132649 A JP H01132649A JP 28850487 A JP28850487 A JP 28850487A JP 28850487 A JP28850487 A JP 28850487A JP H01132649 A JPH01132649 A JP H01132649A
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- copolymer
- propylene
- crystalline
- resin composition
- 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.)
- Pending
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 17
- 229920001577 copolymer Polymers 0.000 claims abstract description 34
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000005977 Ethylene Substances 0.000 claims abstract description 16
- 229920001400 block copolymer Polymers 0.000 claims abstract description 15
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 claims abstract 3
- -1 propylene-ethylene Chemical group 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 238000000465 moulding Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000155 melt Substances 0.000 abstract description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract description 3
- 230000002087 whitening effect Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 11
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 10
- 241000282376 Panthera tigris Species 0.000 description 10
- 238000013020 steam cleaning Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 238000010422 painting Methods 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920005604 random copolymer Polymers 0.000 description 5
- 230000002265 prevention Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 229920001384 propylene homopolymer Polymers 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 241000357292 Monodactylus Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕・
本発明は、自動車外装部品用樹脂組成物に関する。さら
に詳しくは、耐衝撃性に優れ、成形加工性（溶融時の流
動性）、成形品外観および、塗装前処理の１．１．１ト
リクロルエタン蒸気洗浄において、フローマーク部分の
白化防止に優れた自動車外装部品用樹脂組成物に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a resin composition for automobile exterior parts. More specifically, it has excellent impact resistance, molding processability (fluidity when melted), molded product appearance, and excellent prevention of whitening of flow marks in 1.1.1 Trichloroethane steam cleaning for pre-painting treatment. The present invention relates to a resin composition for automobile exterior parts.
（従来の技術）
現在、上述の耐Ｉｒｌ性に優れた自ｖＪＩＩＮ外装部品
用組成物としてポリプロピレンに非晶性エチレン−プロ
ピレン共重合体を配合したオレフィン系エラストマーが
実用化され、塗装バンパー、非塗装バンパー兼用材料と
して使用されている。(Prior art) Currently, an olefin elastomer made by blending an amorphous ethylene-propylene copolymer with polypropylene has been put into practical use as a composition for JIIN exterior parts with excellent Irl resistance as described above. It is also used as a bumper material.
この塗装バンパーは塗装前に１．１．ｌトリクロルエタ
ン蒸気洗浄が行われるが、１．１．１トリクロルエタン
蒸気洗浄により７０−マーク部分の特異な白化現象が発
生する場合があることが分かった。この特異な白化現象
とは、ポリオレフィン系バンパーに現れやすい虎の子役
様の７０−マーク部分（以後虎の子マークと称す）が１
．１゜１トリクロルエタン蒸気洗浄によって真白になる
現象のことで、虎の子マークの特に金型密着不良部分が
白化するものである。この虎の子マーク部分の白化が全
塗装バンパーであれば問題はないが、部分塗装バンパー
では白化した部分がそのまま表に出るため商品価値を著
しく低下させるものである。本発明の目的は、塗装前処
理の１．１．１トリクロルエタン蒸気洗浄処理を施して
もフローマーク部分の白化防止性に優れ、さらに耐衝撃
性、成形加工性、成形品外観に優れた自動車外装部品用
樹脂組成物を提供することにある。Before painting this painted bumper, 1.1. Although 1.1.1 trichloroethane steam cleaning is performed, it has been found that a peculiar whitening phenomenon at the 70-mark portion may occur due to 1.1.1 trichloroethane steam cleaning. This unique whitening phenomenon is caused by the fact that the 70-mark part (hereinafter referred to as the tiger cub mark) that tends to appear on polyolefin bumpers is 1
．． 1゜1 A phenomenon in which the mark becomes pure white due to trichloroethane steam cleaning, and the part of the tiger cub mark that has poor adhesion to the mold becomes white. This whitening of the tiger cub mark part would not be a problem if it was a fully painted bumper, but if the bumper was partially painted, the whitened part would be exposed as is, which would significantly reduce the product value. The object of the present invention is to provide an automobile that has excellent anti-whitening properties in the flow mark area even after 1.1.1 trichloroethane vapor cleaning treatment, which is a pre-painting treatment, and has excellent impact resistance, moldability, and appearance of the molded product. An object of the present invention is to provide a resin composition for exterior parts.
このような自動車外装部品用樹脂組成物に関する上述の
問題点を解決するには、自動車外装用成形品の表面に白
化現象を起こさなくさせるポリマーを配向させる方法が
考えられ、鋭意研究した結果、本発明者らは、低結晶性
エチレンブロッ共重合体を特定量配合することにより、
従来の物性を殆ど変えることなく、塗装前処理の１．１
．１トリクロルエタン蒸気洗浄を行っても虎の子マーク
部分の、白化防止性に優れた自動車外装部品用樹脂組成
物が得られることを見いだし、この知見にもとすいて本
発明を完成した。In order to solve the above-mentioned problems regarding resin compositions for automobile exterior parts, it is possible to consider a method of orienting a polymer that prevents whitening from occurring on the surface of molded automobile exterior parts.As a result of intensive research, this paper was developed. The inventors achieved the following by blending a specific amount of a low-crystalline ethylene block copolymer.
1.1 of pre-painting treatment without changing the conventional physical properties.
．． It has been found that a resin composition for automobile exterior parts having excellent anti-whitening property for the tiger cub mark portion can be obtained even after 1-trichloroethane steam cleaning, and based on this knowledge, the present invention has been completed.
さらに詳しくは、本発明は下記の構成を有する。More specifically, the present invention has the following configuration.
（１） エチレン含有量が２〜２５重景％である結晶性
プロピレン−エチレンブロック共重合体に、非晶性エチ
レン−プロピレン共重合体を５〜２５ｆｆｌｆｆｉ％と
低結晶性エチレン−ブテン共重合体を１〜１０１ｍ％を
配合してなることを特徴とする自動車外装部品用樹脂組
成物。(1) A crystalline propylene-ethylene block copolymer with an ethylene content of 2-25% by weight, an amorphous ethylene-propylene copolymer of 5-25% and a low-crystalline ethylene-butene copolymer. A resin composition for automobile exterior parts, characterized in that it contains 1 to 101 m% of.
（２） エチレン含有量が２〜２５重Ｍ％である結晶性
プロピレン−エチレンブロック共重合体に、非晶性エチ
レン−プロピレン共重合体を５〜２５重ω％と低結晶性
エチレンーブテン共重合体を１〜１０重伝％および密度
０．９４０ｇ／ｃｍ３以上のエチレン系重合体５重量％
以下を配合してなることを特徴とする自動車外装部品用
樹脂組成物。(2) Amorphous ethylene-propylene copolymer is added to a crystalline propylene-ethylene block copolymer having an ethylene content of 2 to 25% by weight and 5 to 25% by weight and a low crystalline ethylene-butene copolymer. 1 to 10% by weight and 5% by weight of an ethylene polymer with a density of 0.940 g/cm3 or more
A resin composition for automobile exterior parts, characterized by containing the following:
（３） （１）、（２）において低結晶性エチレン
−ブテン共重合体として密度０．９１Ｃ１／Ｃ１３１，
１，下のものを使用した自動車外装部品用樹脂組成物。(3) In (1) and (2), the low crystalline ethylene-butene copolymer has a density of 0.91C1/C131,
1. A resin composition for automobile exterior parts using the following.
自動車外装部品用樹脂組成物のベースとなる結晶性プロ
ピレン−エチレンブロック共重合体は重合体中のエチレ
ン含有量が２〜２５重量％であり、８〜１８重量％が好
ましい。該エチレン含有Ｍが２重量％未満では耐１１ｉ
１性の改良効果は小さく、２５［１％を越えて配合した
ものは剛性（２３℃曲げ弾性率）が低下するので好まし
くない。また、該結晶性プロピレン−エチレンブロック
共重合体のメルトツーレートは１０〜５０ｃＪ／１０ｉ
ｉｎ、が好ましく、１０９／１０１ｎ、未満では成形加
工性が低下し、５（１／１０１ｎ、を超えると成形品の
耐衝撃性が低下するので好ましくない。The crystalline propylene-ethylene block copolymer serving as the base of the resin composition for automobile exterior parts has an ethylene content of 2 to 25% by weight, preferably 8 to 18% by weight. If the ethylene content M is less than 2% by weight, the resistance to 11i
The effect of improving the 1 property is small, and if it is added in excess of 25[1%], the stiffness (flexural modulus at 23° C.) decreases, which is not preferable. Moreover, the melt-to-rate of the crystalline propylene-ethylene block copolymer is 10 to 50 cJ/10i
In is preferable, and if it is less than 109/101n, the molding processability will deteriorate, and if it exceeds 5 (1/101n), the impact resistance of the molded product will be deteriorated, which is not preferable.
本発明で使用する非晶性エチレン−プロピレン共重合体
は耐Ｗｉ撃性改良の目的で所定量配合するものであり、
該非晶性エチレン−プロピレン共重合体のムーニー粘度
ＭＬ１＋４ （１００℃）ハ５０以下であることが好ま
しい。ムーニー粘度が５０を超えるものは組成物の流動
性を損ねたり、また成形品外観にフローマークを生じさ
せてしまう恐れがあり好ましくない。また、該非晶性エ
チレン−プロピレン共重合体の配合量は全組成物中の５
〜２５重樋％である、好ましくは１０〜２０重猷％であ
る。非晶性エチレン−プロピレン共重合体の配合量が５
１箇％未満の場合は耐衝撃性の改良効果が十分ではなく
、２５重世％を超えて配合した場合は剛性を低下させる
ので好ましくない。The amorphous ethylene-propylene copolymer used in the present invention is blended in a predetermined amount for the purpose of improving the Wi impact resistance.
The Mooney viscosity ML1+4 (100°C) of the amorphous ethylene-propylene copolymer is preferably 50 or less. A Mooney viscosity exceeding 50 is not preferable because it may impair the fluidity of the composition or cause flow marks on the appearance of the molded product. In addition, the amount of the amorphous ethylene-propylene copolymer is 5% in the total composition.
~25%, preferably 10-20%. The amount of amorphous ethylene-propylene copolymer is 5
If it is less than 1%, the effect of improving impact resistance will not be sufficient, and if it is more than 25%, it will reduce the rigidity, which is not preferable.
本発明に使用する低結晶性エチレン−ブテン共重合体は
耐衝撃性を低下させずに、塗装前処理の１．１．１トリ
クロルエタン蒸気洗浄による白化防止の目的で所定量配
合する。咳低結晶性エチレンーブテン共重合体は密度が
０．９１０９／ｃｍ３以下であり、示差走査型熱量測定
（ＤＳＧ）で示す最大ピーク温度が４０℃〜１２５℃ま
でに存在することが好ましい。密度が０．９１０ｇ／Ｃ
■３を超えるものは固くなるため耐衝撃性保持がむずか
しく、また、ＤＳＣの最大ピークが４０℃未満の場合は
成形品の白化防止効果が小さく、１２５℃以上のものは
耐衝撃性保持がむずかしくなるので好ましくない。また
、該低結晶性エチレン−ブテン共重合体の配合量は全組
成物中の１〜１０重量％であり、１重量％未渦の場合は
成形品の白化防止効果が十分でな（，１０ｉ１％を超え
て配合する場合は剛性を低下させるので好ましくない。The low-crystalline ethylene-butene copolymer used in the present invention is blended in a predetermined amount for the purpose of preventing whitening caused by 1.1.1 trichloroethane steam cleaning in pre-painting treatment without reducing impact resistance. The low-crystalline ethylene-butene copolymer preferably has a density of 0.9109/cm3 or less and a maximum peak temperature measured by differential scanning calorimetry (DSG) of 40°C to 125°C. Density is 0.910g/C
■If the temperature exceeds 3, it will become hard and it will be difficult to maintain impact resistance.If the maximum DSC peak is below 40℃, the whitening prevention effect of the molded product will be small, and if it exceeds 125℃, it will be difficult to maintain impact resistance. This is not desirable. In addition, the amount of the low-crystalline ethylene-butene copolymer is 1 to 10% by weight in the entire composition, and if 1% by weight is not swirled, the whitening prevention effect of the molded product is insufficient (10i1 If it is added in an amount exceeding 5%, the rigidity will be lowered, which is not preferable.
さらに、本発明の組成物には剛性と耐衝撃性のバランス
を落とすことなく、成形品の１．１．１トリクロルエタ
ン蒸気洗浄による白化をさらに防止する目的で密度０．
９４０９／ｃ＋ｅ３以上のエチレン系重合体を所定量配
合することができる。密度０．９４０９／ｃｍ３未満の
エチレン系重合体を配合した場合は耐衝撃性の改良効果
にくらべ剛性が低下するので好ましくない。また、該エ
チレン系重合体の配合ｍは全組成物中の５ｍｍ％以下で
あり、５重量％を超えて配合した場合は成形品外観に虎
の子マークが現れ、非塗装および部分塗装で使用された
場合、商品価値を著しく低下させるので好ましくない。Furthermore, the composition of the present invention has a density of 0.00000.0000000 in order to further prevent whitening of the molded product due to 1.1.1 trichloroethane steam cleaning without compromising the balance between rigidity and impact resistance.
A predetermined amount of an ethylene polymer of 9409/c+e3 or higher can be blended. When an ethylene polymer having a density of less than 0.9409/cm3 is blended, it is not preferable because the rigidity is lowered compared to the effect of improving impact resistance. In addition, the content of the ethylene polymer is 5 mm% or less in the total composition, and if it is blended in excess of 5% by weight, a tiger cub mark will appear on the exterior of the molded product, and it will be difficult to use the product without painting or with partial painting. In this case, it is not preferable because it significantly reduces the product value.
本発明の組成物にあっては、本発明の効果を阻害しない
範囲で、必要に応じて適宜に、酸化防止剤、帯電防止剤
、着色剤、紫外線吸収剤、可塑剤、ＥＰＤＭ用エキステ
ンダーオイル、プロセスオイルなどの鉱物系非芳香族ゴ
ム用軟化剤などの各種添加剤の１種以上を配合すること
ができる。In the composition of the present invention, antioxidants, antistatic agents, colorants, ultraviolet absorbers, plasticizers, extender oil for EPDM, etc. may be added as necessary to the extent that the effects of the present invention are not impaired. , a mineral-based non-aromatic rubber softener such as process oil, and one or more of various additives may be blended.
本発明の組成物の製造方法としては、結晶性プロピレン
−エチレンブロック共重合体、非晶性エチレン−プロピ
レン共重合体、低結晶性エチレン−ブテン共重合体およ
び必要に応じてエチレン系重合体の所定量並びに上述の
各種添加剤の１種以上の所定量をリボンブレンダー、タ
ンブラ−ミキサー、ヘンセルミキサー（商品名）、スー
パーミキサー等で攪伴混合したのち、該混合物をロール
、バンバリーミキサ−１挿置機などで溶融温度１５０℃
から３００℃、好ましくは１８０℃から２５０℃で溶融
混線ペレタイズする方法を例示することができる。The method for producing the composition of the present invention includes a method for producing a crystalline propylene-ethylene block copolymer, an amorphous ethylene-propylene copolymer, a low-crystalline ethylene-butene copolymer, and, if necessary, an ethylene polymer. After stirring and mixing a predetermined amount and a predetermined amount of one or more of the above-mentioned various additives using a ribbon blender, tumbler mixer, Hensel mixer (trade name), super mixer, etc., the mixture is mixed with a roll or Banbury mixer 1. The melting temperature is 150℃ using an insertion machine, etc.
For example, a method of melting and cross-fermenting pelletizing at a temperature of from 180°C to 300°C, preferably from 180°C to 250°C can be exemplified.
かくして得られた本発明の自動車外装部品用樹脂組成物
は、射出成形、押出成形、真空成形、圧空成形などの各
種成形法により種々の成形品の製造に供することができ
る。The thus obtained resin composition for automobile exterior parts of the present invention can be used to produce various molded products by various molding methods such as injection molding, extrusion molding, vacuum forming, and pressure forming.
以下、実施例及び比較例によって本発明を具体的に説明
するが本発明はこれによって限定されるものではない。EXAMPLES The present invention will be specifically explained below with reference to Examples and Comparative Examples, but the present invention is not limited thereto.
なお、実施例および比較例で用いた配合成分および評価
方法は以下の通りである。The ingredients and evaluation methods used in Examples and Comparative Examples are as follows.
（配合成分）
（１）プロピレンエチレンブロック共重合体チッソ石油
化学Ｑ１１１、エチレン含有ｆｆ１２〜２５重針％範囲
で種々変化させたものでメルトフローレート３０ｇ／１
０１ｉｎ、のプロピレン−エチレンプロツク共重合体
（２）プＯビレンーエヂレンランダム共重合体チッソ石
油化学■顎、エチレン含有量４重Ｍ％メルトフローレー
ト６９／１０ａｉｎ、のプ０ビレンーエヂレンランダム
共重合体
（３）プロピレン単独重合体
チッソ石油化学１製
メルトフローレート２０ｇ／１０ｍ１ｎ、のプロピレン
単独重合体
（４）非晶性エチレンープロピレン共重合体ムーニ〜粘
度ＭＬ （１００℃）２５１十４
（５）低結晶性エチレン−ブテン共重合体日本ユニカー
■製、ナックフレックスＤＥＦＤ１２１０（商品名）
（６）エチレン系重合体（Ａ）
チッソ石油化学■製、高密度ポリエチレン雷度０．９６
５９／ｃ＋ｇ３
（７）エチレン系重合体（Ｂ）
低密度ポリエチレン
密度０．９２５ ｇ／Ｃ１３
（評価方法）
（１）メルトフローレート（ｇ／ｌ ０分）；ＪＩＳ
Ｋ６７５８に準拠
〈２）曲げ弾性率（３点曲げ弾性率） （ＫＱｆ／ａ
ｉ）：ＪＩＳ Ｋ７２０３に準拠
（３）アイゾツト衝撃強度 −４０℃
（にｇｊ−ｃ＊／ｃｉ）：ＪＩＳ Ｋ７１１０にｔｔ
Ｐ−拠（４）デュポン衝撃強度（にｇｆ−ａ）：チッソ
法デュポン衝撃試験Ｉｎ（東洋精機製）にて、撃芯１／
４インチＲ，撃芯受は台３／２インチＲ１荷重０．１Ｋ
ｇから３ Ｋｙ、荷重落下高さ１ｍの条件で、試験片５
０Ｘ５０Ｘ２ＪＩＩの平板を用い一４０’Ｃに状態調節
したのち、試験片を撃芯台の上にｙき撃芯を当てて高さ
１ｍから荷重を落下させる。試験片が破壊したら軽い荷
重を、破壊しなければ重い荷重を用いて次々に試験を行
いおよそ試験片の５０％が破壊する荷重を見つける。な
お、破壊形態が穴空きの場合は破壊しなかったものと見
なす。(Ingredients) (1) Propylene ethylene block copolymer Chisso Petrochemical Q111, ethylene content ff varied in the range of 12 to 25 heavy needles, melt flow rate 30 g/1
01in, propylene-ethylene block copolymer (2) propylene-ethylene random copolymer Nisso Petrochemical ■Jaw, ethylene content 4x M% melt flow rate 69/10ain, propylene-ethylene block copolymer (2) propylene-ethylene random copolymer Ren random copolymer (3) Propylene homopolymer manufactured by Chisso Petrochemical 1 Propylene homopolymer with a melt flow rate of 20 g/10 m1n (4) Amorphous ethylene-propylene copolymer Mooni ~ Viscosity ML (100°C) 251 14 (5) Low-crystalline ethylene-butene copolymer manufactured by Nippon Unicar ■, NACFLEX DEFD1210 (trade name) (6) Ethylene polymer (A) manufactured by Chisso Petrochemical ■, high-density polyethylene lightning strength 0.96
59/c+g3 (7) Ethylene polymer (B) Low density polyethylene density 0.925 g/C13 (Evaluation method) (1) Melt flow rate (g/l 0 min); JIS
Based on K6758〈2) Bending modulus (3-point bending modulus) (KQf/a
i): Conforms to JIS K7203 (3) Izot impact strength -40℃ (gj-c*/ci): tt to JIS K7110
P-Based (4) DuPont impact strength (GF-A): Nisso method DuPont impact test In (manufactured by Toyo Seiki), striking core 1/
4 inch R, striking center holder is 3/2 inch R1 load 0.1K
test piece 5 under the conditions of g to 3 Ky and load drop height of 1 m.
After adjusting the condition to -40'C using a flat plate of 0x50x2JII, the test piece was placed on a percussion stand with a percussion pin and a load was dropped from a height of 1 m. If the test piece breaks, a light load is used, and if the test piece does not break, a heavy load is used to perform the test one after another to find the load at which approximately 50% of the test piece breaks. In addition, if the destruction form is a hole, it is assumed that the destruction did not occur.
（５）成形品外観評価：チッソ法
ｌ８２００Ｂ型射出成形機（東芝機械！ｌ）にて、金型
： ４００Ｘ８０Ｘ３ａｍの平板金型成形温度：２３０
℃ 金型温度：３０℃の成形条件で射出成形を行い得ら
れた平板の外観を虎の子マークの目たちやすさで、目視
判定を行った。(5) Molded product appearance evaluation: Mold: 400 x 80 x 3 am flat plate molding temperature: 230 using a Chisso method l8200B injection molding machine (Toshiba Machine! l)
The appearance of the flat plate obtained by injection molding under molding conditions of 30° C. (mold temperature) was visually judged based on the visibility of the tiger cub mark.
評価基準 Ｏ；虎の子マークが若干認められる×；虎の
子マークが目立つ
（６）１．１．１ トリクロルエタンによる白化評価：
チッソ法
試験片４００Ｘ８０Ｘ３ａｇ＋の平板金型を用い、ショ
ート成形したときの先端部分が１．１．１トリクロルエ
タン蒸気中で白化することから、これに２分Ｆａ！浸し
、白化の程度を目視により判定した。Evaluation criteria O: Tiger cub mark is slightly observed ×; Tiger cub mark is noticeable (6) 1.1.1 Evaluation of whitening due to trichloroethane:
When short molding was performed using a Nisso method test piece 400X80X3ag+ flat plate mold, the tip part became white in 1.1.1 trichloroethane vapor, so 2 minutes Fa! The degree of whitening was determined visually.
評価基準 ◎：先端部分の白化がかなり少ないＯ：先端
部分の白化が少ない
Ｘ；先端部分の全体が白化している
実施例１〜７、比較例１〜６
実施例１〜３．および７は、プロピレン−エチレン共重
合体に非晶性エチレン−プロピレン共重合体、低結晶性
エチレン−ブテン共重合体を後述の第１表に記載した配
合割合でヘンセルミキサー（商品名）にて３分間攪伴混
合し、５０φ単軸押出機で、溶融混線温度２３０℃で、
溶融混線押出し、ベレット化した。実施例４〜６におい
ては、密度０．９４０ｇ／ｃｇ”以上のエチレン系重合
体（△）を５重機％以下配合したほかは実施例１にｔ￥
拠して行った。Evaluation criteria ◎: There is very little whitening at the tip O: There is little whitening at the tip X: The entire tip is whitened Examples 1 to 7, Comparative Examples 1 to 6 Examples 1 to 3. and 7 is a Hensel mixer (trade name) in which propylene-ethylene copolymer, amorphous ethylene-propylene copolymer, and low-crystalline ethylene-butene copolymer are mixed in the proportions listed in Table 1 below. Stir and mix for 3 minutes using a 50φ single-screw extruder at a melt mixing temperature of 230°C.
It was melt-cross-extruded and made into a pellet. In Examples 4 to 6, t\
I went based on that.
比較例１では、プロピレン−エチレンブロック共重合体
の代りにプロピレン−エチレンランダム共重合体を配合
し、比較例２ではプロピレン−エチレンブロック共重合
体の代りに、プロピレン単独重合体を配合し、また、比
較例３では低結晶性エチレン−ブテン共重合体を配合せ
ず、比較例４では、非晶性エヂレンーブロビレン共重合
体を配合せず、低結品性Ｅ−Ｂ共市合体を１０℃Ｍｔ％
を珀えて配合し、比較例５ではエチレン系重合体（Ａ）
を５重量％を超えて配合し、比較例６では、密度が０．
９４０ｇ／ｃｍ”未満のエチレン系重合体（Ｂ）を配合
したほかは実施例１〜３にｙＰ、拠して行った。In Comparative Example 1, a propylene-ethylene random copolymer was blended instead of a propylene-ethylene block copolymer, and in Comparative Example 2, a propylene homopolymer was blended instead of a propylene-ethylene block copolymer. In Comparative Example 3, a low-crystalline ethylene-butene copolymer was not blended, and in Comparative Example 4, an amorphous ethylene-propylene copolymer was not blended, and a low-crystalline E-B copolymer was blended. at 10℃Mt%
In Comparative Example 5, ethylene polymer (A)
In Comparative Example 6, the density was 0.
Examples 1 to 3 were followed except that less than 940 g/cm'' of the ethylene polymer (B) was blended.
実施各個および比較各個で得られたベレットを用いてＭ
ＦＲの測定および所定の試験片を成形温度２３０℃、金
型温度３０℃で射出成形性により成形し、曲げ弾性率、
アイゾツト衝撃強度、デュポン衝撃強度の測定を行った
。また、得られたベレットにより、成形品を成形し、得
られた成形品の外観の評価、および１．１．１トリクロ
ルエタン蒸気洗浄による白化評価を行った。その結果を
まとめて第１表に示した。Using the pellets obtained in each experiment and each comparison, M
Measurement of FR and prescribed test pieces were injection molded at a molding temperature of 230°C and a mold temperature of 30°C, and the bending elastic modulus,
Izot impact strength and DuPont impact strength were measured. Furthermore, a molded article was molded from the obtained pellet, and the appearance of the obtained molded article was evaluated, and whitening was evaluated by 1.1.1 trichloroethane steam cleaning. The results are summarized in Table 1.
〔発明の効果）
第１表から明らかなように、本発明に係る組成物を用い
た成形品は耐衝撃性に優れ、成形加工性（溶融時の流動
性）、成形品外観および、塗′ＩＩｌ前処理の１．１．
１トリクＯルエタン蒸気洗浄において、虎の子マーク部
分の白化防止性に優れていることが分かる。これに反し
、プロピレン−エチレンランダム共重合体とプロピレン
単独共重合体を配合した比較例１．２では、耐衝撃性が
低下するので好ましくない。また、低結晶性エチレン−
１テン共重合体を配合しない比較例３では、１゜１．１
トリクＯルエタン蒸気洗浄による白化防止ができず好ま
しくなく、逆に、ソフトセグメントとして低結晶性エチ
レン−ブテン共重合体のみを配合した比較例４では曲げ
弾性率の割に耐衝撃性改良が十分とはいえず好ましくな
い。高密度ポリエチレンを７型開％配合した比較例５で
は、成形品外観に虎の子マークが目だち非塗装および部
分塗装バンパーとして使用する際に商品価値を著しく低
下させるので好ましくない。また、低密度ポリエチレン
を配合した比較例６では耐衝撃性改良の割に剛性が低い
ので好ましくない・[Effects of the Invention] As is clear from Table 1, molded products using the composition according to the present invention have excellent impact resistance, molding processability (fluidity during melting), molded product appearance, and coating. 1.1 of IIl pretreatment.
It can be seen that the whitening prevention property of the tiger cub mark part is excellent in the 1-trick Olethane steam cleaning. On the other hand, Comparative Example 1.2, in which a propylene-ethylene random copolymer and a propylene homocopolymer were blended, is not preferable because the impact resistance decreases. In addition, low crystalline ethylene-
In Comparative Example 3 in which the 1-ten copolymer was not blended, 1°1.1
Whitening cannot be prevented by tric-O-lethane steam cleaning, which is undesirable.On the other hand, in Comparative Example 4, in which only a low-crystalline ethylene-butene copolymer was blended as a soft segment, the impact resistance was sufficiently improved compared to the flexural modulus. Yes, I don't like it. In Comparative Example 5, in which high-density polyethylene was blended at a mold opening percentage of 7%, the tiger cub mark was prominent on the exterior of the molded product, which is not preferable because it significantly reduces the commercial value when used as an unpainted or partially painted bumper. In addition, Comparative Example 6, in which low-density polyethylene was blended, had low rigidity despite improved impact resistance, which is not preferable.
Claims (1)
ピレン−エチレンブロック共重合体に、非晶性エチレン
−プロピレン共重合体を５〜２５重量％と低結晶性エチ
レン−ブテン共重合体を１〜１０重量％を配合してなる
ことを特徴とする自動車外装部品用樹脂組成物。 ２、低結晶性エチレン−ブテン共重合体が密度０．９１
０ｇ／ｃｍ＾３以下である特許請求の範囲第１項記載の
自動車外装部品用樹脂組成物。 ３、エチレン含有量が２〜２５重量％である結晶性プロ
ピレン−エチレンブロック共重合体に、非晶性エチレン
−プロピレン共重合体を５〜２５重量％と低結晶性エチ
レン−ブテン共重合体を１〜１０重量％および密度０．
９４０ｇ／ｃｍ＾３以上のエチレン系重合体５重量％以
下を配合してなることを特徴とする自動車外装部品用樹
脂組成物。 ４、低結晶性エチレン−ブテン共重合体が密度０．９１
０ｇ／ｃｍ＾３以下である特許請求の範囲第３項記載の
自動車外装部品用樹脂組成物。[Scope of Claims] 1. A crystalline propylene-ethylene block copolymer having an ethylene content of 2 to 25% by weight, an amorphous ethylene-propylene copolymer of 5 to 25% by weight, and low crystalline ethylene. - A resin composition for automobile exterior parts, comprising 1 to 10% by weight of a butene copolymer. 2. Low crystalline ethylene-butene copolymer has a density of 0.91
2. The resin composition for automobile exterior parts according to claim 1, which has a molecular weight of 0 g/cm^3 or less. 3. A crystalline propylene-ethylene block copolymer with an ethylene content of 2-25% by weight, 5-25% by weight of an amorphous ethylene-propylene copolymer and a low-crystalline ethylene-butene copolymer. 1-10% by weight and density 0.
1. A resin composition for automobile exterior parts, comprising 5% by weight or less of an ethylene polymer having a weight of 940 g/cm^3 or more. 4. Low crystalline ethylene-butene copolymer has a density of 0.91
4. The resin composition for automobile exterior parts according to claim 3, which has a molecular weight of 0 g/cm^3 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28850487A JPH01132649A (en) | 1987-11-17 | 1987-11-17 | Resin composition for exterior furnishing of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28850487A JPH01132649A (en) | 1987-11-17 | 1987-11-17 | Resin composition for exterior furnishing of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01132649A true JPH01132649A (en) | 1989-05-25 |
Family
ID=17731076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28850487A Pending JPH01132649A (en) | 1987-11-17 | 1987-11-17 | Resin composition for exterior furnishing of automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01132649A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5914363A (en) * | 1995-04-27 | 1999-06-22 | Sumitomo Chemical Company, Limited | Crystalline ethylene-propylene copolymer with ethylene copolymer(s) and/or alkenyl aromatic-grafted rubber |
-
1987
- 1987-11-17 JP JP28850487A patent/JPH01132649A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5914363A (en) * | 1995-04-27 | 1999-06-22 | Sumitomo Chemical Company, Limited | Crystalline ethylene-propylene copolymer with ethylene copolymer(s) and/or alkenyl aromatic-grafted rubber |
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