JPS6234257B2 - - Google Patents
Info
- Publication number
- JPS6234257B2 JPS6234257B2 JP55112706A JP11270680A JPS6234257B2 JP S6234257 B2 JPS6234257 B2 JP S6234257B2 JP 55112706 A JP55112706 A JP 55112706A JP 11270680 A JP11270680 A JP 11270680A JP S6234257 B2 JPS6234257 B2 JP S6234257B2
- Authority
- JP
- Japan
- Prior art keywords
- calcium carbonate
- talc
- higher fatty
- weight
- particle size
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 57
- -1 polypropylene Polymers 0.000 claims description 34
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 28
- 239000000454 talc Substances 0.000 claims description 28
- 229910052623 talc Inorganic materials 0.000 claims description 28
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 25
- 239000000194 fatty acid Substances 0.000 claims description 25
- 229930195729 fatty acid Natural products 0.000 claims description 25
- 239000004743 Polypropylene Substances 0.000 claims description 23
- 229920001155 polypropylene Polymers 0.000 claims description 23
- 239000011256 inorganic filler Substances 0.000 claims description 20
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 19
- 150000004665 fatty acids Chemical class 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011342 resin composition Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 16
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000126 substance Substances 0.000 description 6
- YQEMORVAKMFKLG-UHFFFAOYSA-N glycerine monostearate Natural products CCCCCCCCCCCCCCCCCC(=O)OC(CO)CO YQEMORVAKMFKLG-UHFFFAOYSA-N 0.000 description 5
- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 description 5
- 229910010272 inorganic material Inorganic materials 0.000 description 5
- 239000011147 inorganic material Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 4
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- UTOPWMOLSKOLTQ-UHFFFAOYSA-N octacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O UTOPWMOLSKOLTQ-UHFFFAOYSA-N 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 3
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 229960004488 linolenic acid Drugs 0.000 description 3
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 description 2
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 235000021314 Palmitic acid Nutrition 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- FKOKUHFZNIUSLW-UHFFFAOYSA-N 2-Hydroxypropyl stearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(C)O FKOKUHFZNIUSLW-UHFFFAOYSA-N 0.000 description 1
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- SFIHQZFZMWZOJV-HZJYTTRNSA-N linoleamide Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(N)=O SFIHQZFZMWZOJV-HZJYTTRNSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000001818 polyoxyethylene sorbitan monostearate Substances 0.000 description 1
- 235000010989 polyoxyethylene sorbitan monostearate Nutrition 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 229940093625 propylene glycol monostearate Drugs 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229950011392 sorbitan stearate Drugs 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Description
本発明は剛性、耐衝撃性、光沢及び加工性の改
良されたポリプロピレン樹脂組成物に関する。
ポリプロピレンの剛性、耐衝撃性、寸法安定
性、耐熱性等の機械的特性を改良する目的で無機
物を充填する方法が広く採用されている。しかし
ながら、無機物の充填によつて得られる効果は無
機物の化学組成、形状、粒径、表面状態等の特性
によつて異なるので、目的に応じて適当な無機充
填剤を選択しなければならず、また、たとえ無機
物の充填によつて、ある特定の特性を向上させる
ことができても、他の重要な特性が失われるかあ
るいは弱められるため、その用途がある特定な応
用範囲に限られている。
例えば、ポリプロピレンにタルクを充填し剛性
度、耐熱性、成形収縮等を大きく改良することが
できる。しかし衝撃強度が低下し、耐衝撃性の要
求される分野では使用できない欠点がある。ま
た、ポリプロピレンに炭酸カルシウムを充填し剛
性、耐衝撃性を改良することができるが、炭酸カ
ルシウムはその形状が球状に近いため剛性の改良
効果が小さく、高い剛性を得るためには充填量を
増やさなければならず、そのため耐衝撃性の改良
効果も十分期待できなくなるばかりでなく逆に加
工性が悪くなる。比重が大きくなるなどの欠点が
でてくる。
このように無機物を目的に応じて十分に選択
し、ポリプロピレンに充填したとしても高い剛性
と耐衝撃性を同時に達成することは困難であつ
た。
さらに加工性の面からみれば、ポリプロピレン
は一般に無機物充填によつて流動性が低下し、例
えば射出成形を行えば流れムラあるいは表面の肌
荒れが生じ易く、光沢をはじめとする成形品の外
観が未充填ポリプロピレンに比べて著しく劣り応
用分野も限定されている。
かかる欠点を改良するために、無機物の表面を
処理したり、分散剤、滑剤等を添加する方法が提
案されているが、これらの効果は無機充填剤の種
類すなわち化学組成形状因子、表面特性等によつ
てあるいは製造方法によつて異なり、十分効果が
得られていない。また２種以上の無機充填剤を組
み合せて使用する方法も検討されているが、各々
の充填剤の特性が失われ十分目的を達成するに至
つていないのが実情である。
本発明者等は剛性及び衝撃強度を向上せしめ、
さらに成形品の外観を改良するため、鋭意検討し
たところ、ポリプロピレンに無機充填剤として炭
酸カルシウム及びタルクを、さらに高級脂肪酸、
高級脂肪酸エステル、高級脂肪酸アミドの少くと
も一成分とともに配合することにより所望の効果
が得られることを見出し、さらに本発明の効果
は、炭酸カルシウム及びタルクの粒径をそれぞれ
特定することにより一層発揮されることを見出し
た。本発明はかかる知見に基づくものである。
本発明はポリプロピレン、タルクと炭酸カルシ
ウムの無機充填剤および高級脂肪酸、高級脂肪酸
エステル、高級脂肪酸アミドのうち少くとも一成
分とよりなる剛性、衝撃強度及び光択性に優れた
ポリプロピレン樹脂組成物を提供するものであ
る。
ポリプロピレンに炭酸カルシウムあるいはタル
クを充填する方法は広く採用され、タルクが剛性
改良に効果的で、炭酸カルシウムが耐衝撃性改良
に効果があることは一般によく知られている。し
かし、タルクと炭酸カルシウムの２種以上の無機
物を充填した系では各成分の効果がそのまま発揮
されることなく、むしろ両成分の特徴が混合する
ことによつて失われる点が問題となつていた。し
かるに本発明によればポリプロピレンに特定の粒
径を有する炭酸カルシウムとタルクの無機充填剤
とともに高級脂肪酸、高級脂肪酸エステル、高級
脂肪酸アミドのうち少くとも一成分を添加するこ
とによつて、該樹脂中での無機充填剤の分散性及
び加工時の流動性が極めて良好となるため成形品
の流れ模様の発生がなくなり、表面光択も改良さ
れるとともに、剛性と衝撃強度を向上させること
ができる。
本発明に用いられているタルクとは代表的には
3MgO・4SiO2・H2Oで表わされる天然無機物で
あつて、微粉砕して一般に市販されている。タル
クは５μ以下の微粉末が好適である。
本発明に用いられる炭酸カルシウムは平均粒径
は0.5μ以下の微粉末が好適であつて、特に化学
的に反応して製造される、いわゆる微粒の沈降性
炭酸カルシウムが好適である。
本発明において、用いるタルクおよび炭酸カル
シウムの粒径は重要な構成因子であり、上記の各
粒径の範囲よりも粗粒の無機物を充填した場合は
本発明の充填効果が得られない。一般に無機充填
剤が粒径であるほど、剛性、衝撃強度、光沢度の
改良効果が大きい。しかしながら、タルクと炭酸
カルシウムとを併用する本発明においては該炭酸
カルシウムを微粒で、特にタルクとの粒径比を
１／10以下にすることが、十分な剛性、衝撃強度
及び光沢度を改良する上で極めて重要である。天
然産のタルクは機械粉砕し、さらに分級して実用
に供されるがそのため合成されたものに比べて粗
粒である。従つて、このような比較的粗粒のタル
クにより微粉末の炭酸カルシウムを加えてポリプ
ロピレンに混入した場合、タルクの周辺を埋める
形で炭酸カルシウムが存在し、また成形品の表面
においては微粒の炭酸カルシウムが表面に露出し
て生ずるタルクの凸凹を平滑化する動きをするも
のと考えられる。このため衝撃強度及び光沢度が
改良される。
本発明のポリプロピレン樹脂組成物において、
タルクと炭酸カルシウムの混合割合は、目的とす
る樹脂組成物の特性によつて異なるが、無機充填
剤の中で炭酸カルシウムの占める割合が５〜95重
量％の範囲、好ましくは10〜90重量％の範囲が好
適である。この範囲を外れて炭酸カルシウムが多
いかあるいは少い場合は、炭酸カルシウムあるい
はタルク単独を充填した場合と同じ結果となり本
発明の効果が得られない。また、本発明における
タルクと炭酸カルシウムよりなる無機充填剤の添
加量は２〜60重量％、好ましくは10〜50重量％の
範囲が好適である。この範囲を外れて充填剤の少
いところでは機械的特性、特に剛性の改良が十分
でなく、充填量の多いところでは流動性低下のた
め加工性が悪くなり、衝撃強度、光沢度の低下が
著しく実用的でない。
本発明に用いられる高級脂肪酸とは、例えばミ
リスチン酸、パルミチン酸、ステアリン酸、モン
タン酸、オレイン酸、エルカ酸、リノール酸、リ
ノレン酸等が含まれる。
高級脂肪酸エステルとは高級脂肪酸とアルコー
ルとの縮合で得られる化合物で例えばステアリン
酸の誘導体についてみるとポリオキシエチレンジ
ステアレート、グリセロールモノステアレート、
ソルビタンステアレート、プロピレングリコール
モノステアレート、ポリオキシプロピレングリコ
ールモノステアレート、ポリオキシエチレンソル
ビタンモノステアレートなどがある。同様にミリ
スチン酸、パルミチン酸、ステアリン酸、モンタ
ン酸、オレイン酸、エルカ酸、リノール酸、リノ
レン酸等のエステルも含まれる。
高級脂肪酸アミドとは例えばパルミチン酸アミ
ド、ステアリン酸アミド、オレイン酸アミド、リ
ノール酸アミド、リノレン酸アミド、エルカ酸ア
ミド等がある。
高級脂肪酸、高級脂肪酸エステル、高級脂肪酸
アミドの添加量は無機充填剤に対して0.1〜10重
量部、好ましくは１〜５重量部である。0.1重量
部以下では本発明の効果が得られず、10重量部以
上添加した場合は加工時の発煙が著しい、成形品
の表面にブリードアウトするなどの悪影響を及ぼ
すことがある。
これらの添加方法としてはポリプロピレンと無
機充填剤を混合する時に同時に添加混合する、あ
るいは予かじめ無機充填剤を処理しその後ポリプ
ロピレンと混合する方法のいずれも適用できる。
あるいは無機充填剤の製造過程あるいは粉砕過程
でこれら高級脂肪酸、高級脂肪酸エステル、高級
脂肪酸アミドで処理して用いることもできる。
本発明に用いるポリプロピレンとはプロピレン
を重合して得られる結晶性ポリプロピレンで、プ
ロピレンとエチレン、ブテン、ペンテン等の共重
合体も含まれる。特にエチレン含有率が１〜10重
量％の範囲にあるエチレン−プロピレンブロツク
共重合体が本発明の効果を発揮する上で好適であ
る。結晶性ポリプロピレンの割合は98〜40重量
％、好ましくは90〜50重量％の範囲が好適であ
る。
本発明の組成物を混合、混練及び成形する方法
は一般に行われる方法が何ら制限なく適用でき
る。例えば、本発明の組成物をタンブラー、ミキ
サー等により混合し、バンバリーミキサー、ロー
ル、単軸押出機、２軸押出機等の混練機を通すこ
とによつて混練造粒し、射出成形機、プレス成形
機、シート成形機等によつて製品に成形する方法
等が適用できる。
以下、実施例によつて本発明をさらに詳細に説
明する。
実施例 １〜７
結晶性エチレン−プロピレンブロツク共重合体
（エチレン含有率3.0重量％、メルトフローインデ
ツクス（MFI）3.0ｇ／10分）にタルク（平均粒
径1.7μ）および炭酸カルシウム（平均粒径0.15
μ）を第１表に示す所定量を、またグリセロール
モノステアレートを無機充填剤に対して同じく第
１表に示す所定量を添加して、ミキサーで３分間
混合し、２軸混練機で210℃で混練してペレツト
化した。このペレツトを射出成形機で250℃で成
形して、試験片を作成し、次の試験法に従つて、
曲げ弾性率、アイゾツト衝撃強度、光沢度を測定
した。
曲げ弾性率 ASTM D790
アイゾツト衝撃強度（ノツチ付） D256
光沢度（光沢計UGU−4D 入射角60゜）メルト
フローインデツクス（MFI） D1238
実施例 ８〜10
実施例１において、高級脂肪酸、高級脂肪酸エ
ステル、高級脂肪酸アミドの種類を変えた以外は
実施例１と同様に成形し、物性を測定した。それ
ぞれの結果を第１表に示す。
比較例 １〜４
実施例１で使用した結晶性エチレン−プロピレ
ンブロツク共重合体、タルク、炭酸カルシウム及
びグリセロールモノステアレートを第１表に示し
たように配合し、実施例１と同様に混練、成形
し、物性を測定した。結果を第１表に示した。
比較例 ５
実施例１で用いたエチレン−プロピレンブロツ
ク共重合体70重量％、タルク（平均粒径8.0μ）
15重量％、炭酸カルシウム（平均粒径1.7μ）15
重量％、グリセロールモノステアレートを無機充
填剤に対して２重量部添加して実施例１と同様に
成形し、物性を測定した。結果を第１表に示し
た。本発明に比べて、衝撃強度、光沢度、剛性の
改良効果が十分でないことは明らかである。
比較例 ６
実施例１で用いたエチレン−プロピレンブロツ
ク共重合体70重量％、タルク（平均粒径1.7μ）
15重量％、炭酸カルシウム（平均粒径0.3μ）15
重量％、グリセロールモノステアレートを無機充
填剤に対して２重量部添加して、実施例１と同様
に成形し、物性を測定した。結果を第１表に示し
た。本発明に比べて衝撃強度、光沢度、剛性の改
良効果が十分でないことは明らかである。
The present invention relates to polypropylene resin compositions with improved stiffness, impact resistance, gloss and processability. A method of filling polypropylene with inorganic substances is widely used to improve mechanical properties such as rigidity, impact resistance, dimensional stability, and heat resistance. However, the effects obtained by filling inorganic materials vary depending on the chemical composition, shape, particle size, surface condition, and other characteristics of the inorganic material, so it is necessary to select an appropriate inorganic filler depending on the purpose. Furthermore, even if a certain property can be improved by filling with inorganic materials, other important properties are lost or weakened, so its use is limited to a specific range of applications. . For example, by filling polypropylene with talc, rigidity, heat resistance, molding shrinkage, etc. can be greatly improved. However, it has the disadvantage that impact strength is reduced and it cannot be used in fields where impact resistance is required. Furthermore, it is possible to improve the rigidity and impact resistance of polypropylene by filling it with calcium carbonate, but since the shape of calcium carbonate is close to a spherical shape, the effect of improving the rigidity is small, and in order to obtain high rigidity, the filling amount must be increased. Therefore, not only cannot a sufficient effect of improving impact resistance be expected, but also workability deteriorates. There are disadvantages such as increased specific gravity. Even if an inorganic substance is sufficiently selected according to the purpose and filled into polypropylene, it is difficult to simultaneously achieve high rigidity and impact resistance. Furthermore, from the perspective of processability, polypropylene generally has reduced fluidity due to inorganic filling, and when injection molding is performed, for example, uneven flow or surface roughness tends to occur, resulting in poor gloss and other appearance of the molded product. It is significantly inferior to filled polypropylene, and its application fields are limited. In order to improve these drawbacks, methods have been proposed to treat the surface of inorganic materials or add dispersants, lubricants, etc., but the effects of these methods depend on the type of inorganic filler, i.e., chemical composition shape factor, surface characteristics, etc. Depending on the product or manufacturing method, sufficient effects are not obtained. A method of using a combination of two or more types of inorganic fillers has also been considered, but the reality is that the characteristics of each filler are lost and the purpose has not been fully achieved. The present inventors improved the rigidity and impact strength,
Furthermore, in order to improve the appearance of the molded product, we conducted extensive research and found that calcium carbonate and talc were added as inorganic fillers to polypropylene, and higher fatty acids,
It has been discovered that the desired effect can be obtained by blending with at least one component of higher fatty acid ester and higher fatty acid amide, and furthermore, the effect of the present invention can be further exhibited by specifying the particle sizes of calcium carbonate and talc, respectively. I discovered that. The present invention is based on this knowledge. The present invention provides a polypropylene resin composition with excellent rigidity, impact strength, and photoselectivity, which is composed of polypropylene, an inorganic filler of talc and calcium carbonate, and at least one component among higher fatty acids, higher fatty acid esters, and higher fatty acid amides. It is something to do. The method of filling polypropylene with calcium carbonate or talc is widely adopted, and it is generally well known that talc is effective in improving rigidity, and calcium carbonate is effective in improving impact resistance. However, the problem with systems filled with two or more inorganic substances, talc and calcium carbonate, is that the effects of each component cannot be fully demonstrated as they are, but rather the characteristics of both components are lost when mixed. . However, according to the present invention, by adding at least one component of higher fatty acids, higher fatty acid esters, and higher fatty acid amides to polypropylene along with inorganic fillers of calcium carbonate and talc having a specific particle size, The dispersibility of the inorganic filler and the fluidity during processing are extremely good, which eliminates the occurrence of flow patterns in the molded product, improves surface selectivity, and improves rigidity and impact strength. The talc used in the present invention is typically
It is a natural inorganic substance represented by 3MgO.4SiO 2 .H 2 O, and is generally commercially available after being finely ground. Talc is preferably a fine powder of 5 μm or less. The calcium carbonate used in the present invention is preferably a fine powder with an average particle size of 0.5 μm or less, and particularly so-called fine precipitated calcium carbonate produced by chemical reaction is preferable. In the present invention, the particle size of the talc and calcium carbonate used is an important constituent factor, and if the inorganic material is filled with particles coarser than the above particle size ranges, the filling effect of the present invention cannot be obtained. Generally, the larger the particle size of the inorganic filler, the greater the effect of improving rigidity, impact strength, and gloss. However, in the present invention, in which talc and calcium carbonate are used together, it is preferable to use fine particles of calcium carbonate, especially at a particle size ratio of 1/10 or less with respect to talc, to sufficiently improve rigidity, impact strength, and gloss. This is extremely important. Naturally produced talc is mechanically crushed and then classified for practical use, but as a result, it has coarser particles than synthetic talc. Therefore, when finely powdered calcium carbonate is added to polypropylene using relatively coarse-grained talc, calcium carbonate exists in the form of filling the periphery of the talc, and fine-grained carbonate forms on the surface of the molded product. It is thought that calcium moves to smooth out the unevenness of talc that occurs when it is exposed on the surface. This improves impact strength and gloss. In the polypropylene resin composition of the present invention,
The mixing ratio of talc and calcium carbonate varies depending on the characteristics of the target resin composition, but the proportion of calcium carbonate in the inorganic filler is in the range of 5 to 95% by weight, preferably 10 to 90% by weight. A range of is suitable. If the amount of calcium carbonate is too much or too little outside of this range, the result will be the same as when calcium carbonate or talc alone is filled, and the effects of the present invention will not be obtained. Further, the amount of the inorganic filler made of talc and calcium carbonate added in the present invention is preferably in the range of 2 to 60% by weight, preferably 10 to 50% by weight. Outside this range, where the amount of filler is small, mechanical properties, especially rigidity, will not be improved sufficiently, and where there is a large amount of filler, the flowability will decrease, resulting in poor processability and a decrease in impact strength and gloss. Extremely impractical. The higher fatty acids used in the present invention include, for example, myristic acid, palmitic acid, stearic acid, montanic acid, oleic acid, erucic acid, linoleic acid, linolenic acid, and the like. Higher fatty acid esters are compounds obtained by condensation of higher fatty acids and alcohols.For example, stearic acid derivatives include polyoxyethylene distearate, glycerol monostearate,
Examples include sorbitan stearate, propylene glycol monostearate, polyoxypropylene glycol monostearate, and polyoxyethylene sorbitan monostearate. Similarly, esters of myristic acid, palmitic acid, stearic acid, montanic acid, oleic acid, erucic acid, linoleic acid, linolenic acid and the like are also included. Examples of higher fatty acid amides include palmitic acid amide, stearic acid amide, oleic acid amide, linoleic acid amide, linolenic acid amide, and erucic acid amide. The amount of higher fatty acid, higher fatty acid ester, and higher fatty acid amide added is 0.1 to 10 parts by weight, preferably 1 to 5 parts by weight, based on the inorganic filler. If it is less than 0.1 part by weight, the effects of the present invention cannot be obtained, and if it is added in excess of 10 parts by weight, it may cause adverse effects such as significant smoke generation during processing and bleed-out on the surface of the molded product. As for the method of adding these, either of adding and mixing the polypropylene and the inorganic filler at the same time when mixing them, or a method of treating the inorganic filler in advance and then mixing it with the polypropylene can be applied.
Alternatively, it can be used after being treated with these higher fatty acids, higher fatty acid esters, or higher fatty acid amides during the production or pulverization process of the inorganic filler. The polypropylene used in the present invention is a crystalline polypropylene obtained by polymerizing propylene, and also includes copolymers of propylene and ethylene, butene, pentene, and the like. In particular, an ethylene-propylene block copolymer having an ethylene content in the range of 1 to 10% by weight is suitable for exhibiting the effects of the present invention. The proportion of crystalline polypropylene is suitably in the range of 98 to 40% by weight, preferably 90 to 50% by weight. The composition of the present invention can be mixed, kneaded and molded by any commonly used methods without any limitations. For example, the composition of the present invention is mixed in a tumbler, mixer, etc., kneaded and granulated by passing through a kneading machine such as a Banbury mixer, roll, single screw extruder, twin screw extruder, etc., and then kneaded and granulated by an injection molding machine, press, etc. A method of forming the product into a product using a molding machine, a sheet molding machine, etc. can be applied. Hereinafter, the present invention will be explained in more detail with reference to Examples. Examples 1 to 7 Talc (average particle size 1.7μ) and calcium carbonate (average particle size Diameter 0.15
μ) in the specified amount shown in Table 1 and glycerol monostearate in the same amount shown in Table 1 to the inorganic filler, mixed in a mixer for 3 minutes, and mixed in a twin-screw kneader at 210 m The mixture was kneaded at ℃ to form pellets. This pellet was molded at 250℃ with an injection molding machine to create a test piece, and according to the following test method,
Flexural modulus, Izot impact strength, and gloss were measured. Flexural modulus ASTM D790 Izo impact strength (notched) D256 Glossiness (gloss meter UGU-4D angle of incidence 60°) Melt flow index (MFI) D1238 Examples 8 to 10 In Example 1, higher fatty acids and higher fatty acid esters The molding was performed in the same manner as in Example 1 except that the type of higher fatty acid amide was changed, and the physical properties were measured. The results are shown in Table 1. Comparative Examples 1 to 4 The crystalline ethylene-propylene block copolymer used in Example 1, talc, calcium carbonate, and glycerol monostearate were blended as shown in Table 1, and kneaded in the same manner as in Example 1. It was molded and its physical properties were measured. The results are shown in Table 1. Comparative Example 5 70% by weight of the ethylene-propylene block copolymer used in Example 1, talc (average particle size 8.0μ)
15% by weight, calcium carbonate (average particle size 1.7μ) 15
% by weight, glycerol monostearate was added in an amount of 2 parts by weight based on the inorganic filler, molded in the same manner as in Example 1, and the physical properties were measured. The results are shown in Table 1. It is clear that the effect of improving impact strength, glossiness, and rigidity is not sufficient compared to the present invention. Comparative Example 6 70% by weight of the ethylene-propylene block copolymer used in Example 1, talc (average particle size 1.7μ)
15% by weight, calcium carbonate (average particle size 0.3μ) 15
2 parts by weight of glycerol monostearate based on the inorganic filler was added, molded in the same manner as in Example 1, and the physical properties were measured. The results are shown in Table 1. It is clear that the effect of improving impact strength, glossiness, and rigidity is not sufficient compared to the present invention.
【表】【table】
Claims (1)
炭酸カルシウムの無機充填剤２〜60重量％、およ
び高級脂肪酸、高級脂肪酸エステル、高級脂肪酸
アミドのうち少くとも一成分が該無機充填剤に対
して0.1〜10重量部であるポリプロピレン樹脂組
成物。 ２ 無機充填剤の中で炭酸カルシウムの割合が５
〜95重量％である特許請求の範囲第１項記載のポ
リプロピレン樹脂組成物。 ３ タルクの平均粒径が５μ以下、炭酸カルシウ
ムの平均粒径が0.5μ以下、かつタルクに対する
炭酸カルシウムの平均粒径の比が１／10以下であ
る特許請求の範囲第１項記載のポリプロピレン樹
脂組成物。[Claims] 1. 40 to 98% by weight of a polypropylene resin, 2 to 60% by weight of an inorganic filler of talc and calcium carbonate, and at least one component of a higher fatty acid, a higher fatty acid ester, and a higher fatty acid amide as the inorganic filler. A polypropylene resin composition in an amount of 0.1 to 10 parts by weight based on the agent. 2 The proportion of calcium carbonate in the inorganic filler is 5
95% by weight of the polypropylene resin composition according to claim 1. 3. The polypropylene resin according to claim 1, wherein the average particle size of talc is 5 μ or less, the average particle size of calcium carbonate is 0.5 μ or less, and the ratio of the average particle size of calcium carbonate to talc is 1/10 or less. Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11270680A JPS5738841A (en) | 1980-08-18 | 1980-08-18 | Polypropylene resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11270680A JPS5738841A (en) | 1980-08-18 | 1980-08-18 | Polypropylene resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5738841A JPS5738841A (en) | 1982-03-03 |
| JPS6234257B2 true JPS6234257B2 (en) | 1987-07-25 |
Family
ID=14593450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11270680A Granted JPS5738841A (en) | 1980-08-18 | 1980-08-18 | Polypropylene resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5738841A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2147001B (en) * | 1983-09-24 | 1987-02-11 | Bip Chemicals Ltd | Filled thermoplastics |
| JPS6211749A (en) * | 1985-07-10 | 1987-01-20 | Idemitsu Petrochem Co Ltd | Propylene-ethylene copolymer composition |
| JP3771836B2 (en) * | 2001-12-11 | 2006-04-26 | 三菱電機株式会社 | Brush generator detection system for automotive alternator |
| CN104387649B (en) * | 2014-11-19 | 2017-01-25 | 联塑市政管道（河北）有限公司 | Special shrinkage-cavity prevention material for thick-wall PE (polyethylene) pipe and method for preparing same |
| CN114163721B (en) * | 2021-11-08 | 2023-08-29 | 金发科技股份有限公司 | Polypropylene calcium carbonate master batch and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852837A (en) * | 1971-11-08 | 1973-07-25 | ||
| JPS5073942A (en) * | 1973-11-01 | 1975-06-18 | ||
| JPS5280345A (en) * | 1975-12-27 | 1977-07-06 | Mitsui Toatsu Chem Inc | Polypropylene resin compositions |
| JPS5392856A (en) * | 1977-01-26 | 1978-08-15 | Hitachi Ltd | Polyolefin resin composition |
| JPS55120642A (en) * | 1979-03-13 | 1980-09-17 | Mitsubishi Petrochem Co Ltd | Olefin polymer composition |
| JPS5716042A (en) * | 1980-07-03 | 1982-01-27 | Mitsubishi Petrochem Co Ltd | Resin composition containing inorganic filler |
-
1980
- 1980-08-18 JP JP11270680A patent/JPS5738841A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852837A (en) * | 1971-11-08 | 1973-07-25 | ||
| JPS5073942A (en) * | 1973-11-01 | 1975-06-18 | ||
| JPS5280345A (en) * | 1975-12-27 | 1977-07-06 | Mitsui Toatsu Chem Inc | Polypropylene resin compositions |
| JPS5392856A (en) * | 1977-01-26 | 1978-08-15 | Hitachi Ltd | Polyolefin resin composition |
| JPS55120642A (en) * | 1979-03-13 | 1980-09-17 | Mitsubishi Petrochem Co Ltd | Olefin polymer composition |
| JPS5716042A (en) * | 1980-07-03 | 1982-01-27 | Mitsubishi Petrochem Co Ltd | Resin composition containing inorganic filler |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5738841A (en) | 1982-03-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3347958B2 (en) | Propylene resin composition | |
| JPS647098B2 (en) | ||
| JPH0662837B2 (en) | Flame-retardant polybutylene terephthalate composition | |
| JP3160059B2 (en) | Propylene resin composition | |
| JPH03185052A (en) | Molding composition | |
| DE1694349A1 (en) | Plastic mixtures for the production of impermeable films | |
| JPS6234257B2 (en) | ||
| JPH0337577B2 (en) | ||
| JPS60124654A (en) | Electrically conductive resin composition | |
| US4499227A (en) | Thermoplastic resin composition having high impact strength | |
| US5116540A (en) | Free-radical modified carbon black filled polypropylenes | |
| JPS58222132A (en) | Talc-containing polypropylene composition | |
| JPH101594A (en) | Polyoxymethylene composition | |
| JPH02212532A (en) | Polypropylene composite material reinforced with granulated fibrous magnesium oxysulfate | |
| JPS59172533A (en) | Production of reinforced resin composition | |
| JP2684056B2 (en) | Thermoplastic resin composition and molded article made of the same | |
| JPS5931538B2 (en) | Propylene polymer composition containing inorganic filler | |
| JPS603415B2 (en) | Polypropylene resin composition | |
| JPS5942015B2 (en) | Method for producing mineral-filled polyethylene composition | |
| JPH01131260A (en) | Plastic magnet composition | |
| KR960006625B1 (en) | Polypropylene resin composition | |
| JPS6139340B2 (en) | ||
| JPS6323945A (en) | Surface-treating agent for filter for polyolefin | |
| JPH0316979B2 (en) | ||
| JPS58129037A (en) | Propylene polymer composition |