JPS58104905A - Injection molded polypropylene article having high rigidity - Google Patents
Injection molded polypropylene article having high rigidityInfo
- Publication number
- JPS58104905A JPS58104905A JP20406481A JP20406481A JPS58104905A JP S58104905 A JPS58104905 A JP S58104905A JP 20406481 A JP20406481 A JP 20406481A JP 20406481 A JP20406481 A JP 20406481A JP S58104905 A JPS58104905 A JP S58104905A
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene
- injection molded
- present
- boiling
- isotactic pentad
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 関する。[Detailed description of the invention] related.
ポリプロピレン成形品は、耐熱性、耐薬品性、電気的性
質について優れており、さらに射出成形物については、
剛性、引張り強度、被加工、性も良好である。しかしな
がら、該射出成形物の具体的用途によっては、これらの
性質が寸分とは云えない場合があり、そのため具体的用
途の拡大が制限されている。Polypropylene molded products have excellent heat resistance, chemical resistance, and electrical properties, and injection molded products have
Rigidity, tensile strength, workability, and properties are also good. However, depending on the specific use of the injection molded product, these properties may not be perfect, which limits the expansion of specific uses.
４１に剛性に関しては、結晶性ポリプロピレン（以下ポ
リプロピレン）を用〜・た射出成形物はポリスチレン若
しくはＡＢ８樹脂を用いた射出成形物よりや〜低いため
、ポリプロピレンのこの分ＩＦＫおける具体的用途の拡
大の為忙は重大な隘路となっている。ボリグロビレン射
出威形物の剛性を従来のものより一段と面上させること
が可能となれば、該成形物について同一強度を維持する
ためｋは、その剛性向上忙対比する分だけ成形物の薄肉
化が可能となる。このことは、省資源の見地から望まし
いばかりでなく、該薄肉化によって成彫時の冷却時間を
短かくすることができる。したがって、単位時間当りの
射出成形速度を向上させることが可能となり、省力およ
び生産性向上に寄与できるのである。Regarding rigidity, injection molded products using crystalline polypropylene (hereinafter referred to as polypropylene) are slightly lower than injection molded products using polystyrene or AB8 resin. Busyness is a serious bottleneck. If it becomes possible to further increase the rigidity of polyglopylene injection moldings compared to conventional ones, in order to maintain the same strength of the molded product, the thickness of the molded product will need to be made thinner to compensate for the increase in rigidity. It becomes possible. This is not only desirable from the viewpoint of resource saving, but also the cooling time during carving can be shortened by making the wall thinner. Therefore, it becomes possible to improve the injection molding speed per unit time, contributing to labor saving and productivity improvement.
従来、ポリプロピレン成形物の剛性を添加剤によって向
上させる方法として次の二つが知られている。その一つ
は、有機造核剤たとえばアルミニウム・パラ・ターシャ
リ・ブチルベンゾエート若しくは（１・３）（２・４）
ジベンジリデンソルビトールを用いる方法である。しか
し、これらのものの使用は高価であるためたとえ少量の
使用であっても経済的でない上ｋ、射出成形品の光沢、
衝撃強度、引張り伸び等の物性が大巾に低下するという
欠点がある。他の一つは、無機充填剤たとえば、タルク
、炭酸カルシウム、硫酸バリウム、マイカ、アスベスト
若しくはケイ酸カルシウムを用いる方法である。しかし
、これらのものの添加量・は、ポリフロピレンに対して
相当の割合（たとｌ［えば１０〜５０重量−）となるの
で、射出成形品“め軽量性透明性とい５ボ１閣
リブ１ピレン独自の特徴が損なわれる。その上有機造核
剤の場合と同様に光沢、衝撃強度および伸びも低下する
。Conventionally, the following two methods are known as methods for improving the rigidity of polypropylene molded articles using additives. One of them is organic nucleating agents such as aluminum para tertiary butyl benzoate or (1.3) (2.4).
This method uses dibenzylidene sorbitol. However, since the use of these materials is expensive, it is not economical even if used in small quantities, and the gloss of injection molded products
It has the disadvantage that physical properties such as impact strength and tensile elongation are significantly reduced. Another is the use of inorganic fillers such as talc, calcium carbonate, barium sulfate, mica, asbestos or calcium silicate. However, since the amount of these substances added is a considerable proportion (for example, 10 to 50% by weight) to polypropylene, the injection molded product has 5 points, 1 rib, 1 pyrene unique property. Furthermore, as with organic nucleators, gloss, impact strength and elongation are also reduced.
本発明者等は、ポリプロピレン射出成形物の剛性向上に
関する前述の方法に伴う欠点のない該成形物について鋭
意研究した。その結果、後述の本発明により限定された
アイソタクチックペンタッド分率を有するポリフロピレ
ンを用いることにより、何等特別な添加剤を用いること
なく高剛性射出成形物が得られることを知って本発明を
完成した。このようなポリフロピレンは、本願と同日付
で出願した本願と竺１−出願人の出願に係る特願昭５６
− 号の明細書に記載された方法によって製
造できる。The present inventors have made extensive research into polypropylene injection molded products that do not have the drawbacks associated with the aforementioned methods for improving the rigidity of the molded products. As a result, we learned that by using polypropylene having an isotactic pentad fraction limited according to the present invention, which will be described later, a highly rigid injection molded product can be obtained without using any special additives. completed. Such polypropylene is disclosed in the present patent application filed on the same date as the present patent application and the patent application filed in 1983 by the applicant.
− It can be manufactured by the method described in the specification of item No.
以上の記述から明らかなようＫ、本発明の目的は、高剛
性でより具体的用途の抜；太若し、くけより薄肉化の可
能なポリプロピレン射出成形物を提供するにある。他の
目的は、以下の記述から明らかＫされる。本発明は
（υ■アイソタクチックペンタッド分率（Ｐ）とメルト
７０−インデックス（ＭＦ Ｒ）とが１、ｏｏ〉Ｐ〉α
（１１５１ｏｇＶＦＲ−１−０，９５５・・・・・・Ａ
の関係忙あり、■沸騰ｎ−ヘキサンおよび沸騰ｎ−へブ
タンで逐次抽出した抽出物のアイソタクチックペンタッ
ド分率（Ｆ）がそれぞれ０．４５０〜α７００、および
（１７５０〜０．９３０である結晶性ポリプロピレンを
用いてなる高剛性ポリプロピレン射出成形物、
（２）無機充填剤を併用してなる前記第（１項の成形物
である。As is clear from the above description, an object of the present invention is to provide a polypropylene injection molded product that has high rigidity and can be made thicker or thinner for more specific applications. Other objectives will be apparent from the description below. In the present invention, (υ■ isotactic pentad fraction (P) and melt 70-index (MFR) are 1, oo>P>α
(1151ogVFR-1-0,955...A
■ The isotactic pentad fraction (F) of the extract extracted sequentially with boiling n-hexane and boiling n-hexane is 0.450 to α700 and (1750 to 0.930, respectively). A highly rigid polypropylene injection molded product made using crystalline polypropylene; (2) The molded product described in item (1) above, which is made by using an inorganic filler in combination.
以下本発明の構成と効果につき詳ｍｃｖｔ明する。The structure and effects of the present invention will be explained in detail below.
アイソタクチックペンタッド分率（Ｐ）とは、ポリプロ
ピレン分子鎖中のペンタッド単位でのアイツククチツク
分率であり、ｍａｃｒｏｍｏｌｅｃｕｌｅｓＢ ６８７
（１９７５）Ｋ発表されている方法に基づ（・て測定さ
れる。この測定法においては、１３Ｃ−ＮＭＲを使用す
る。上記式Ａの要件は、一般にＭＦＲの低いポリプロピ
レンの前記分率Ｐは、低下するので、使用すべきポリフ
ロピレンとしてその低下効果を限定する構成要件とした
ものである。そして＃Ｐは分率であるから１．００が上
限となる。つぎに■の沸騰ｎ−ヘキサン抽出物は、ポリ
プロピレン中に通常数悌含まれるがこのものの該分率は
、例えば０．１Ｏ−（１７０σ）ようにプロピレンの重
合法によ−・て大巾に変化【７うるものである。本発明
に使用するポリプロピレン中のこの抽出分はｒが（１，
４５０〜０．７０［１の範囲内帆なければならな（・、
、 ０．４５［１朱渉σ）場合本発明の射出成形物（以
下本発明品と℃・うことがある）の剛性は改善さね得ろ
が、千の反面本発明品の他の物性すなわち硬度、熱変形
温度等の改良効果が不充分である。仝Ｕ〈沸１１ ｎ
−へブタン継続抽出物の該分率Ｐは、本発明に使用する
ポリプロピレンを沸騰ｎ−へキサンで抽出残についてさ
らに抽出した部分についてのものである。本発明に使用
するポリプロピレン中のこの抽出分は、Ｐが０７５ｏ〜
α９３０の節回になけわばならｔ「い。０７５ｏ朱満の
場合本発明品の剛性は改善され得るが、その反面本発明
品の他の物性について前述の沸騰Ｄ−ヘキサン抽出物の
場合と同様の欠点が生じＺ、。沸騰ｎ−ヘキサンおよび
沸ｌＩｎ−ヘプタンによる逐次抽出物の抽出合計量は限
定されな（・。しがｌながｒ−２原料ポリプロピレン中
の該合計量は、事実上１．０〜１１０重量慢の範囲内に
あるものが多く、この範囲内のポリプロピレンは範囲外
のものより好ましい結果が得られる。Isotactic pentad fraction (P) is the isotactic fraction of pentad units in a polypropylene molecular chain, and is an isotactic fraction of pentad units in a polypropylene molecular chain.
(1975) K is measured based on the published method. In this measurement method, 13C-NMR is used. The requirements of the above formula A are generally such that the fraction P of polypropylene with a low MFR is , decreases, so this is a constituent element that limits the decreasing effect of polypropylene to be used.Since #P is a fraction, the upper limit is 1.00.Next, boiling n-hexane extraction in (2) Polypropylene usually contains several molecules of this substance, but the fraction of this substance can vary widely depending on the propylene polymerization method, for example, 0.1O-(170σ). This extract in the polypropylene used in the invention is such that r is (1,
Must sail within the range of 450 to 0.70 [1 (・,
, 0.45 [1 °C), the rigidity of the injection molded product of the present invention (hereinafter referred to as the product of the present invention) will not be improved, but on the other hand, the other physical properties of the product of the present invention, namely The effect of improving hardness, heat distortion temperature, etc. is insufficient.仝U〈 11 n
-Hebutane The fraction P of the continuous extract refers to the portion of the polypropylene used in the invention which has been further extracted with boiling n-hexane to remove the extraction residue. This extract in the polypropylene used in the present invention has P of 075o to
In the case of α930, the rigidity of the product of the present invention can be improved. A similar drawback arises.The total amount of extraction of the sequential extracts with boiling n-hexane and boiling lIn-heptane is not limited. Many polypropylenes fall within the range of 1.0 to 110% by weight, and polypropylenes falling within this range give more favorable results than those outside this range.
前述の逐次抽出はつぎのよ５に行５゜すなわち、ポリプ
ロピレンの粉末に少量の熱安定剤（註、例えばα１慢の
２．６−シータ−ジャリーブチル−パラクレゾール）を
混合して押出様で造粒した造粒品を粉砕機で粉砕し、峡
粉砕品を２０メツシユ（タイラー）の篩で処理した通過
分の中３ｆＩをソックスレー抽出器を用いて先づ１０〇
−の１ｌＨＩｒｔ−ヘキサノで、つづいて１００ｗＩｌ
の沸騰ｎ−へブタンで各６時間抽出し、各被抽出分を沈
澱分離乾燥秤量する。また、ＭＦＲは、ＪＩ８に７２１
０の方法に従い、２３０ｔｌｌ’、荷重２．１６０ｇで
測定する。The above-mentioned sequential extraction is carried out as follows: 5゜That is, the polypropylene powder is mixed with a small amount of heat stabilizer (Note, for example, 2.6-theta-jalybutyl-para-cresol with α1) and prepared in an extrusion manner. The granulated product was pulverized with a pulverizer, and the pulverized product was processed through a 20-mesh (Tyler) sieve. 3 fI of the passed through was extracted using a Soxhlet extractor, first with 100 ml of HIrt-hexano, and then te100wIl
The mixture was extracted with boiling n-hebutane for 6 hours each, and each extracted fraction was precipitated, separated, dried, and weighed. Also, MFR is 721 for JI8
According to the method of 0, it is measured at 230 tll' and a load of 2.160 g.
本発明は、各種のポリプロピレン射出成形物忙広く適用
され、その高剛性の特徴を発揮できる。本発明の射出成
形品は、従来の同等品よりも薄肉化が可能であり、また
は、従来ポリスチレン若しくはＡＢＢ＠脂を用いた射出
成形品に代替し得なかった具体的分野にまで適用率可能
である。本発明に使用するポリプロピレン樹脂には、高
剛性化のための公知の添加剤（註、前述の有機造核剤ま
たは無接充填剤）を添加することＫよりさら忙高剛性化
を図ることもできる。The present invention can be widely applied to various injection molded polypropylene products, and can exhibit its high rigidity. The injection molded product of the present invention can be made thinner than conventional equivalent products, or can be applied to specific fields where injection molded products using polystyrene or ABB@fat could not be replaced. be. The polypropylene resin used in the present invention may be further increased in rigidity by adding known additives (note: the above-mentioned organic nucleating agent or unattached filler) to increase the rigidity. can.
以下実施例によって本発明を説明する一各実施例、比較
例における賭物性の測定法は、下ｒＫよった。The present invention will be explained below with reference to Examples.The method for measuring gambling property in each Example and Comparative Example was as follows.
曲げ弾性率 ＪＩ８Ｋ 、６７５８ ％ｆ／ｃｄ）
曲げ強度 ｌ ＃ 〃
引張り強度 ｌ＃ｌ
硬度（ロックウェル） ｐ （Ｒ−
畝一ル）熱変形温度（ＨＤＴ）ＪＩ８Ｋ ７２ｏ２
（ｒ）実施例１〜３、比較例１〜３
後述第１表に示した各ＭＦＲおよび各アイソ）・Ｉｌｌ
、。Flexural modulus JI8K, 6758%f/cd)
Bending strength l# 〃 Tensile strength l#l Hardness (Rockwell) p (R-
ridge) Heat distortion temperature (HDT) JI8K 72o2
(r) Examples 1 to 3, Comparative Examples 1 to 3 Each MFR and each iso shown in Table 1 below)・Ill
,.
タクチックペンタ□ツド分率を有するポリプロピレン粉
末４ＫｇＫフェノール系熱安定剤ｏ、ｏｏ４１ｗ、ステ
アリン酸カルシウム０００４Ｋｇを加女高達攪拌式混舎
機（註、ヘンシェルミキサー、商品名）で室温下［１０
分混合し、除混合物をスクリュー口径４０■の押出造粒
機を用いて造粒した。4 kg of polypropylene powder having a tactical penta-do fraction was mixed with 4 kg of phenolic heat stabilizers o, oo 41 w, and calcium stearate in a kame-takada stirring mixer (Note: Henschel mixer, trade name) at room temperature [10
The mixed mixture was granulated using an extrusion granulator with a screw diameter of 40 mm.
ついで、該造粒物を射出成形機で溶融樹脂温度２３０Ｃ
１金形温度ＳａＣでＪＩＳ形のテストピースを作製し、
該テストピースにつき、湿度５０俤、室温２５Ｃの室内
で７２時間状態調整した。Next, the granulated material was heated to a molten resin temperature of 230C using an injection molding machine.
1. Fabricate a JIS type test piece at a mold temperature of SaC,
The test piece was conditioned for 72 hours in a room with a humidity of 50 degrees and a room temperature of 25C.
ついで徒述第１表のように物性値を測定した。Then, physical property values were measured as shown in Table 1.
上表に明らかなようにアイソタクチックペンタッド分率
？２ついて本発明の範囲内にあるポリプロピレンを用い
て射出成形して得た本発明品は、同表の成形品物性イ〜
ホについてそれぞれイ、１７，０００．０．４６０、ハ
、３６０各−ｆ凧二、１１０（Ｒ−スケール）およびホ
、１１７ｒ以上の物性値を有するに対し、本発明の範囲
外のアイソタクチックペンタッド分率を有する比較例１
〜３のポリプロピレンを用いて得た試験片は前記イ〜ホ
のいづれの項目についても本発明品におよばない。比較
例１〜３のポリプロピレンは、現在市販されているポリ
プロピレンと同等品であるので、このような市販品によ
っては、本発明の高剛性射出成形品が得られないことが
明ら”である・ 、、、１
実施例４．５、比較例４〜７
・、！
後述第２表に示した各′□ＭＦＲおよび各ペンタッド分
率を有するポリプロピレン粉末を用いた以外は、実施例
１〜５と同様に実施した。使用したポリプロピレンの品
質および得られた射出成形物の物性を第２表に示す。Isotactic pentad fraction as shown in the table above? Regarding 2, the product of the present invention obtained by injection molding using polypropylene within the scope of the present invention has the molded product physical properties I to 1 in the same table.
The isotactic kite, which is outside the scope of the present invention, has physical property values of 2, 110 (R-scale) and 117r or more. Comparative example 1 with pentad fraction
The test pieces obtained using the polypropylenes of No. 3 to 3 did not measure up to the products of the present invention in any of the items A to E above. Since the polypropylenes of Comparative Examples 1 to 3 are equivalent to currently commercially available polypropylenes, it is clear that the highly rigid injection molded products of the present invention cannot be obtained with such commercially available products. ,,,1 Example 4.5, Comparative Examples 4 to 7 ・,! Examples 1 to 5 except that polypropylene powders having each '□MFR and each pentad fraction shown in Table 2 below were used. The same procedure was carried out. Table 2 shows the quality of the polypropylene used and the physical properties of the injection molded product obtained.
上表に明らかなように、アイソタクチックペンタッド分
率Ｐについて本発明の範囲内にあるポリプロピレンを用
いて得た本発明品は、実施例１〜３と同様の水準の同表
のイ〜ホの各物性値を有する。これに対し、３種類のア
イソタクチックペンタッド分率Ｐのいづれも本発明の要
件を満足していない比較例４．５については、前述の比
較例１〜３の場合と同様に上記イ〜ホのいづれの物性値
項目も実施例１〜５の水準に及ばなｔ・。他方、比較例
６．７については、や〜効果が異なる。すなわち、これ
らの比較例にあっては、全ポリマーについてのアイソタ
クチックペンタッド分率Ｐが、本発明の要件を満足する
ためか、前記第２１！ｌの物性値中イ〜ノ・すなわち曲
げ弾性率、曲げ強度は本発明の水準を維持できるが、物
性値中二、ホすなわち硬度および’）ＩＤＴについては
、比較例６．７のいづれも本発明の水準を維持できない
。As is clear from the above table, the products of the present invention obtained using polypropylene whose isotactic pentad fraction P is within the range of the present invention have the same levels of I to A in the same table as Examples 1 to 3. It has the following physical property values. On the other hand, regarding Comparative Example 4.5 in which none of the three types of isotactic pentad fractions P satisfy the requirements of the present invention, the above-mentioned All of the physical property values were below the level of Examples 1 to 5. On the other hand, the effects of Comparative Examples 6 and 7 are somewhat different. That is, in these comparative examples, the isotactic pentad fraction P of all polymers satisfies the requirements of the present invention. Among the physical property values I to No, that is, flexural modulus and bending strength, the levels of the present invention can be maintained, but for physical property values II and E, that is, hardness and ') IDT, both of Comparative Examples 6 and Unable to maintain the standard of invention.
実施例６、比較例８
実施例２と同じポリプロピレン（與＃８例６）および比
較例２と同じポリプロビレ〉（比較例８）を用い、ポリ
プロピレン４匂当りそわぞれ平均粒径２〜３μの微粉宋
タルクを００４匂添加した以外は、実施例１〜５と同様
に実施した。Example 6, Comparative Example 8 Using the same polypropylene as in Example 2 (#8 Example 6) and the same polypropylene as in Comparative Example 2 (Comparative Example 8), polypropylene with an average particle size of 2 to 3 μm per 4 odors was used. The same procedure as in Examples 1 to 5 was carried out except that 004 amount of finely powdered Song talc was added.
結果を後述ｖ、３表に示す。同表に明らかなようＫ、少
量のタルクの添加により射出成形品の各種強度は、それ
ぞれ対応する無添加の場合（針実施例２、比較例２）よ
り著しく向上しており、本発１１１１においては、無機
充填材の併用が有効であることを示している。しかしな
が−比較例８の物性値はいづれも対応する実施４Ｐｌ
６のものに及ばず、使用するポリプロピレンについての
本発明の帯性（３種のアイソタクチックペンタッド分率
Ｐ）が必須であることを示１−ている、実施例７、比較
例９
実施例６および比較例８においてそれぞれタルクに代ｔ
て０．０１６ＫＩＩのターシャリ−ブチル安息香酸アル
ミニウム塩を用いた匂外は同様に実施した（前者は実施
例７、徒者は比較例９）、結果を後述第５表に示す。The results are shown in Table 3 below. As is clear from the same table, the various strengths of injection molded products by adding K and a small amount of talc are significantly improved compared to the corresponding cases without additives (Needle Example 2, Comparative Example 2). shows that the combined use of inorganic fillers is effective. However, the physical property values of Comparative Example 8 are the same as those of the corresponding implementation 4Pl.
Example 7 and Comparative Example 9 demonstrate that the banding properties of the present invention (3 types of isotactic pentad fractions P) for the polypropylene used are essential. In Example 6 and Comparative Example 8, t was added to talc, respectively.
A similar test was carried out using 0.016KII tertiary-butylbenzoic acid aluminum salt (the former was in Example 7, and the latter was in Comparative Example 9), and the results are shown in Table 5 below.
同表に明らかなよ５に、少量のタルクの添加により射出
成形品の各種強度は、それぞれ対応するｌｌｌｆｔ加の
場合（註、実施例２、比較例２）より著しく向上してお
り、本発明においては、有機造核剤の併用が有効である
ことを示している。しかしながら比較例９の物性値はい
づれも対応する実施例７のものに及ばず、使用するポリ
プロピレン忙ついての本発明の要件（５種のアイソタク
チックペンタッド分率Ｐ）が所定範囲内に在ることが必
須であることを示している。As is clear from the table 5, the various strengths of the injection molded products by adding a small amount of talc are significantly improved compared to the corresponding cases of adding lllft (Note, Example 2, Comparative Example 2), and the present invention This shows that the combined use of an organic nucleating agent is effective. However, none of the physical property values of Comparative Example 9 were as good as those of the corresponding Example 7, and the requirements of the present invention regarding the polypropylene used (the isotactic pentad fraction P of 5 types) were within the predetermined range. This indicates that it is essential to
第３表 射出成形試験結果 特許出願人 チッソ株式会社Table 3 Injection molding test results Patent applicant: Chisso Corporation
Claims (2)
ト°フローインデックス（ＭＦＲ）とがｔｏｏ＞Ｐ＞α
Ｑ １５１ｏｇＭＦＲ＋α９５５の関係にあり、■沸騰
胞−へキサンおよび沸騰ｎ−へブタンで逐次抽出した抽
出物のアイソタクチックペンタッド分率（Ｐ）がそれぞ
れ０、４５０〜α７００および（Ｌ７５０〜α９５０で
ある結晶性ポリプロピレンを用いてなる高剛性ポリプロ
ピレン射出成形物。(1)■Isotactic pentad fraction (P) and melt °flow index (MFR) are too>P>α
Q There is a relationship of 151ogMFR + α955, and the isotactic pentad fraction (P) of extracts extracted sequentially with boiling cell-hexane and boiling n-hexane is 0, 450 to α700, and (L750 to α950), respectively. A highly rigid polypropylene injection molded product made from crystalline polypropylene.
）項の成形物。(2) Claim No. 1 (1) in which an inorganic filler is used in combination
) Molded products.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20406481A JPS58104905A (en) | 1981-12-17 | 1981-12-17 | Injection molded polypropylene article having high rigidity |
| GB08235201A GB2114581B (en) | 1981-12-17 | 1982-12-09 | Ziegler catalyst for producing polypropylene |
| DE19823246447 DE3246447A1 (en) | 1981-12-17 | 1982-12-15 | POLYPROPYLENE FOR PRODUCING HIGHLY STIFF MOLDED BODIES AND METHOD FOR PRODUCING THE SAME |
| CA000417917A CA1193398A (en) | 1981-12-17 | 1982-12-16 | Polypropylene capable of producing high-rigidity molded products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20406481A JPS58104905A (en) | 1981-12-17 | 1981-12-17 | Injection molded polypropylene article having high rigidity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58104905A true JPS58104905A (en) | 1983-06-22 |
| JPH0361685B2 JPH0361685B2 (en) | 1991-09-20 |
Family
ID=16484155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20406481A Granted JPS58104905A (en) | 1981-12-17 | 1981-12-17 | Injection molded polypropylene article having high rigidity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58104905A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61155404A (en) * | 1984-12-28 | 1986-07-15 | Idemitsu Petrochem Co Ltd | Crystalline polypropylene |
| JPS63156842A (en) * | 1986-12-19 | 1988-06-29 | Chisso Corp | Polypropylene composition |
| JPS6466217A (en) * | 1987-09-08 | 1989-03-13 | Idemitsu Petrochemical Co | Propylene polymer |
-
1981
- 1981-12-17 JP JP20406481A patent/JPS58104905A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61155404A (en) * | 1984-12-28 | 1986-07-15 | Idemitsu Petrochem Co Ltd | Crystalline polypropylene |
| JPH064684B2 (en) * | 1984-12-28 | 1994-01-19 | 出光石油化学株式会社 | Crystalline polypropylene |
| JPS63156842A (en) * | 1986-12-19 | 1988-06-29 | Chisso Corp | Polypropylene composition |
| JPH0480060B2 (en) * | 1986-12-19 | 1992-12-17 | Chisso Corp | |
| JPS6466217A (en) * | 1987-09-08 | 1989-03-13 | Idemitsu Petrochemical Co | Propylene polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0361685B2 (en) | 1991-09-20 |
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