JPH0632964A - Polypropylene for injection molding - Google Patents
Polypropylene for injection moldingInfo
- Publication number
- JPH0632964A JPH0632964A JP18557492A JP18557492A JPH0632964A JP H0632964 A JPH0632964 A JP H0632964A JP 18557492 A JP18557492 A JP 18557492A JP 18557492 A JP18557492 A JP 18557492A JP H0632964 A JPH0632964 A JP H0632964A
- Authority
- JP
- Japan
- Prior art keywords
- propylene
- block copolymer
- injection
- injection molding
- ethylene block
- 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
- -1 Polypropylene Polymers 0.000 title claims abstract description 28
- 238000001746 injection moulding Methods 0.000 title claims abstract description 16
- 239000004743 Polypropylene Substances 0.000 title abstract description 5
- 229920001155 polypropylene Polymers 0.000 title abstract description 5
- 229920001400 block copolymer Polymers 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 6
- 239000005977 Ethylene Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003484 crystal nucleating agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
(57)【要約】
【目的】 衝撃強度と耐熱剛性の優れたポリプロピレン
射出成形物を得るための射出成形用プロピレン−エチレ
ンブロック共重合体。
【構成】 γ−キナクリドンを１０〜１０００ｐｐｍ含
有する射出成形用プロピレン−エチレンブロック共重合
体。(57) [Summary] [Purpose] A propylene-ethylene block copolymer for injection molding for obtaining a polypropylene injection-molded product having excellent impact strength and heat resistance rigidity. [Structure] A propylene-ethylene block copolymer for injection molding containing 10 to 1000 ppm of γ-quinacridone.
Description
【０００１】[0001]
【産業上の利用分野】本発明は衝撃強度および耐熱剛性
の優れた射出成形物を得ることのできる射出成形用ポリ
プロピレンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polypropylene for injection molding which makes it possible to obtain an injection molded article excellent in impact strength and heat resistance.
【０００２】[0002]
【従来の技術】プロピレン−エチレンブロック共重合体
は、ポリプロピレンの耐熱剛性をそれほど損わずに衝撃
強度を改良した樹脂として、工業的に広く使用されてい
る。しかし、用途によっては衝撃強度の更なる向上が強
く望まれており、例えばゴム状物質の混合が行なわれて
いる。2. Description of the Related Art A propylene-ethylene block copolymer is widely used industrially as a resin having improved impact strength without significantly impairing the heat resistance and rigidity of polypropylene. However, further improvement in impact strength is strongly desired for some applications, and for example, rubber-like substances are mixed.
【０００３】一方、プロピレン−エチレン射出成形物の
耐熱剛性を改良する方法としては、例えばタルクや炭酸
カルシウムなどの微粉末粒子を充填したものを原料とし
て用いる方法が知られている。On the other hand, as a method for improving the heat resistance and rigidity of a propylene-ethylene injection-molded article, there is known a method of using, as a raw material, a material filled with fine powder particles such as talc and calcium carbonate.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記し
たようなゴム状物質を混合したプロピレン−エチレンブ
ロック共重合体を用いて成形した射出成形物は、衝撃強
度は改良されるが、反面で耐熱剛性が低下するという欠
点を有している。また、微粉末粒子を充填したプロピレ
ン−エチレンブロック共重合体を用いて成形した射出成
形物は、耐熱剛性は改良されるが、反面で衝撃強度が低
下するという欠点がある。However, the injection molded article molded using the propylene-ethylene block copolymer mixed with the rubber-like substance as described above has an improved impact strength, but on the other hand, it has a high heat resistance and rigidity. Has the drawback that Further, an injection-molded article molded using a propylene-ethylene block copolymer filled with fine powder particles has improved heat resistance rigidity, but has a drawback that impact strength is reduced.
【０００５】このように、単一の手段で衝撃強度と耐熱
剛性が共に優れたプロピレン−エチレンブロック共重合
体射出成形物を得ることは、従来の方法では困難であっ
た。As described above, it has been difficult to obtain a propylene-ethylene block copolymer injection-molded article excellent in both impact strength and heat resistance by a single method by the conventional method.
【０００６】[0006]
【問題を解決するための手段】本発明者は、簡単な手段
でプロピレン−エチレンブロック共重合体射出成形物の
衝撃強度を改良する方法について鋭意研究を重ねた結
果、γ−キナクリドンを特定量添加したプロピレン−エ
チレンブロック共重合体を射出成形することにより、衝
撃強度と耐熱剛性を兼ね備えたプロピレン−エチレン射
出成形物が得られることを見出し、本発明を完成するに
至った。Means for Solving the Problems As a result of intensive studies on a method for improving the impact strength of a propylene-ethylene block copolymer injection-molded product by a simple means, the present inventors have found that a specific amount of γ-quinacridone is added. It was found that a propylene-ethylene injection-molded product having both impact strength and heat resistance can be obtained by injection-molding the above-mentioned propylene-ethylene block copolymer, and the present invention has been completed.
【０００７】即ち、本発明は、γ−キナクリドンを１０
〜１０００ｐｐｍ含有する射出成形用プロピレン−エチ
レンブロック共重合体である。本発明に使用されるプロ
ピレン−エチレンブロック共重合体は特に制限されない
が、一般にメルトフローインデックスが０．１〜１００
ｇ／１０分、好ましくは０．５〜３０ｇ／１０分、エチ
レン含量が１〜３０重量％、好ましくは２〜１５重量％
のものである。プロピレン−エチレンブロック共重合体
の製法は特に制限されず、例えば三塩化チタンと有機ア
ルミニウム化合物を含む触媒の存在下にプロピレンを重
合し、次いで第一工程で得られた触媒を含む重合体の存
在下に、エチレンのみ、あるいはエチレンとプロピレン
の混合モノマーをブロック共重合させる二段重合法等が
ある。プロピレン−エチレンブロック共重合体には、そ
れ以外のポリマー、充填剤、結晶核剤、酸化防止剤、熱
安定剤、滑剤、難燃剤、帯電防止剤、顔料、その他の添
加剤を必要に応じて、本発明の効果を著しく損わない範
囲で含有していてもよい。That is, the present invention provides γ-quinacridone with 10
It is a propylene-ethylene block copolymer for injection molding containing ˜1000 ppm. The propylene-ethylene block copolymer used in the present invention is not particularly limited, but generally has a melt flow index of 0.1 to 100.
g / 10 minutes, preferably 0.5 to 30 g / 10 minutes, ethylene content 1 to 30% by weight, preferably 2 to 15% by weight
belongs to. The production method of the propylene-ethylene block copolymer is not particularly limited, for example, propylene is polymerized in the presence of a catalyst containing titanium trichloride and an organoaluminum compound, and then the presence of the polymer containing the catalyst obtained in the first step. Below, there is a two-step polymerization method in which only ethylene or a mixed monomer of ethylene and propylene is block-copolymerized. Other polymers, fillers, crystal nucleating agents, antioxidants, heat stabilizers, lubricants, flame retardants, antistatic agents, pigments, and other additives may be added to the propylene-ethylene block copolymer as required. It may be contained in a range that does not significantly impair the effects of the present invention.
【０００８】本発明のプロピレン−エチレンブロック共
重合体におけるγ−キナクリドンの含量は、１０〜１０
００ｐｐｍが好ましい。このγ−キナクリドン含量が１
０ｐｐｍ未満の場合には衝撃強度および耐熱剛性改良効
果が小さく、また１０００ｐｐｍを超えた場合には衝撃
強度の改良効果が低下し、赤色着色が強くなり、さらに
コストも高くなるため好ましくない。The content of γ-quinacridone in the propylene-ethylene block copolymer of the present invention is 10 to 10.
00 ppm is preferred. This γ-quinacridone content is 1
When it is less than 0 ppm, the effect of improving impact strength and heat resistance is small, and when it exceeds 1000 ppm, the effect of improving impact strength decreases, red coloring becomes strong, and the cost becomes high, which is not preferable.
【０００９】また、本発明のプロピレン−エチレンブロ
ック共重合体におけるγ−キナクリドンの含有は、任意
の混合方法で行うことができる。例えば、プロピレン−
エチレンブロック共重合体の粉末またはペレットと所定
量のγ−キナクリドンをタンブラー、ヘンシェルミキサ
ーなどで混合する。この混合物をスクリュー押出機やロ
ールなどで混練することもできる。The propylene-ethylene block copolymer of the present invention may contain γ-quinacridone by any mixing method. For example, propylene-
The powder or pellets of the ethylene block copolymer and a predetermined amount of γ-quinacridone are mixed with a tumbler, a Henschel mixer or the like. This mixture can also be kneaded with a screw extruder, a roll, or the like.
【００１０】本発明のγ−キナクリドンを含有するプロ
ピレン−エチレンブロック共重合体による射出成形は、
通常のスクリューインライン式またはプランジャー式射
出成形機を用いて、プロピレン−エチレンブロック共重
合体を成形する成形条件下で行うことができる。例えば
低圧射出成形、射出圧縮成形、ガス注入射出成形、射出
ブロー成形、プッシュプル射出成形、ロストコア射出成
形、２シェル法射出成形などの特殊射出成形法で行うこ
ともできる。Injection molding with the propylene-ethylene block copolymer containing γ-quinacridone of the present invention is
It can be carried out under the molding conditions for molding the propylene-ethylene block copolymer using a usual screw in-line type or plunger type injection molding machine. For example, special injection molding methods such as low-pressure injection molding, injection compression molding, gas injection injection molding, injection blow molding, push-pull injection molding, lost core injection molding, and two-shell injection molding can be used.
【００１１】[0011]
【発明の効果】上記した本発明のプロピレン−エチレン
ブロック共重合体を用いることにより、衝撃強度および
耐熱剛性の優れたポリプロピレン射出成形物を得ること
ができる。By using the above-mentioned propylene-ethylene block copolymer of the present invention, a polypropylene injection molded article having excellent impact strength and heat resistance can be obtained.
【００１２】[0012]
【実施例】以下に本発明の実施例を示すが、本発明はこ
れに制限されるものでない。EXAMPLES Examples of the present invention will be shown below, but the present invention is not limited thereto.
【００１３】実施例１ 徳山曹達（株）製のＭＦＩ＝２．４ｇ／１０分、エチレ
ン含量＝３．９重量％のプロピレン−エチレンブロック
共重合体粉末（ＰＮ６３０）、ＭＦＩ＝４．２ｇ／１０
分のホモポリプロピレン粉末（ＰＮ１３０）およびＭＦ
Ｉ＝２．３ｇ／１０分、エチレン含量＝３．７重量％の
プロピレン−エチレンランダム共重合体粉末（ＰＮ４３
５）に表１に示す量のγ−キナクリドンを混合し、４０
ｍｍφスクリュー押出機で２４０℃で溶触混練ペレタイ
ズを行った。得られたペレットから、スクリューインラ
イン式射出成形機を用い、シリンダー温度２８０℃、金
型温度４０℃、射出速度１３．５ｃｃ／秒、射出圧力５
００ｋｇ／ｃｍ2 、射出時間３０秒および冷却時間１０
秒の条件でＡＳＴＭ曲げ試験片およびノッチ付アイゾッ
ト衝撃試験片を射出成形した。Example 1 MFI = 2.4 g / 10 minutes, propylene-ethylene block copolymer powder (PN630) having an ethylene content of 3.9% by weight, manufactured by Tokuyama Soda Co., Ltd., MFI = 4.2 g / 10
Minute homo polypropylene powder (PN130) and MF
I = 2.3 g / 10 min, ethylene content = 3.7 wt% propylene-ethylene random copolymer powder (PN43
5) was mixed with the amount of γ-quinacridone shown in Table 1 to obtain 40
The melt-kneading pelletizing was performed at 240 ° C. with a mmφ screw extruder. From the obtained pellets, using a screw in-line injection molding machine, cylinder temperature 280 ° C., mold temperature 40 ° C., injection speed 13.5 cc / sec, injection pressure 5
00 kg / cm 2 , injection time 30 seconds and cooling time 10
ASTM bending test pieces and notched Izod impact test pieces were injection molded under the condition of seconds.
【００１４】表１に２３℃で測定したアイゾット衝撃強
度および４．６ｋｇ／ｃｍ2 の応力で測定した熱変形温
度を示す。Table 1 shows the Izod impact strength measured at 23 ° C. and the heat distortion temperature measured at a stress of 4.6 kg / cm 2 .
【００１５】[0015]
【表１】 [Table 1]
【００１６】以上より、γ−キナクリドンを１０〜１０
００ｐｐｍ含有するプロピレン−エチレンブロック共重
合体から射出成形された成形物は衝撃強度および耐熱剛
性ともに優れていることがわかる。From the above, γ-quinacridone was added in an amount of 10 to 10
It can be seen that the molded product injection-molded from the propylene-ethylene block copolymer containing 00 ppm is excellent in both impact strength and heat resistance.
Claims (1)
ｍ含有する射出成形用プロピレン−エチレンブロック共
重合体。1. γ-quinacridone in an amount of 10 to 1000 pp
m-containing propylene-ethylene block copolymer for injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18557492A JP3240582B2 (en) | 1992-07-14 | 1992-07-14 | Injection molding polypropylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18557492A JP3240582B2 (en) | 1992-07-14 | 1992-07-14 | Injection molding polypropylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0632964A true JPH0632964A (en) | 1994-02-08 |
| JP3240582B2 JP3240582B2 (en) | 2001-12-17 |
Family
ID=16173194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18557492A Expired - Fee Related JP3240582B2 (en) | 1992-07-14 | 1992-07-14 | Injection molding polypropylene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3240582B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101440217B1 (en) * | 2013-02-07 | 2014-09-17 | 삼성토탈 주식회사 | Polypropylene composition to improve a low temperature impact strength and its articles |
-
1992
- 1992-07-14 JP JP18557492A patent/JP3240582B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101440217B1 (en) * | 2013-02-07 | 2014-09-17 | 삼성토탈 주식회사 | Polypropylene composition to improve a low temperature impact strength and its articles |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3240582B2 (en) | 2001-12-17 |
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