JP3740815B2 - Resin composite - Google Patents

Resin composite Download PDF

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JP3740815B2
JP3740815B2 JP34499597A JP34499597A JP3740815B2 JP 3740815 B2 JP3740815 B2 JP 3740815B2 JP 34499597 A JP34499597 A JP 34499597A JP 34499597 A JP34499597 A JP 34499597A JP 3740815 B2 JP3740815 B2 JP 3740815B2
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weight
vinyl chloride
parts
chloride resin
resin composition
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JPH11170452A (en
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優 田中
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三菱化学エムケーブイ株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、熱可塑性樹脂成形品と軟質塩化ビニル系樹脂組成物とからなる天然木に酷似する外観を持ち、耐候性に優れた樹脂複合体に関する。
【0002】
【従来の技術】
微細に粉砕された木粉を充填剤とした熱可塑性樹脂組成物は、古くから知られており、特に塩化ビニル系樹脂組成物は着色性、成形性が優れ、かつ比較的安価であることから幅広く用いられている。木粉と塩化ビニル系樹脂組成物を混合した製品は、木材と塩化ビニル系樹脂との特徴を併せ持ち、木質感に溢れた意匠性の高いものであり、内装建材等に使用されている。
【0003】
しかしながら、製品の木質感を高めるためには、多量の木粉を混合する必要があり、塩化ビニル系樹脂組成物の耐候性及び耐衝撃性等の物理的性質を著しく低下させる。例えば、特開昭62−86042号公報にあるように、耐衝撃性改良の試みが様々行われているが、耐衝撃性は、木粉の添加されていない塩化ビニル系樹脂組成物に比べると極端に低い。また、耐候性は、レベル的に未だに低く、屋内用途に限られ、又、屋外で使用する場合には、ウレタン系等の塗料をコーティングする方法が採用されているが、塗装コストが高く、作業環境衛生面においても不都合がある等の欠点があった。
【0004】
【発明が解決しようとする課題】
本発明者は、木質感を持ち、物理的物性の低下の少ない、かつ屋外でも使用可能な耐候性に優れた樹脂成形品を得るべく鋭意検討した結果、樹脂成形品の表面に木粉を含有する耐候性の良好な軟質塩化ビニル系樹脂組成物を被覆したものが上述の目的を達しうることを見出し、本発明を完成するに到った。
即ち、本発明の目的は、木質感に溢れ、耐候性及び物理的性質の優れた樹脂複合体を提供するにある。
【0005】
【課題を解決するための手段】
しかして、本発明の要旨とするところは、熱可塑性樹脂成形品に、下記(a)〜(e)を主成分とする軟質塩化ビニル系樹脂組成物が積層されてなる樹脂複合体に存する。
(a)塩化ビニル系樹脂 100重量部
(b)可塑剤(次の可塑剤合計量) 15〜200重量部
リン酸エステル系可塑剤 1〜15重量部
エポキシ系可塑剤 1〜15重量部
その他可塑剤 残量
(c)木粉 3〜100重量部
(d)Ba、Zn、Ca、Sn、Al又はMgから選択される少なくとも
一種類の金属元素を含む熱安定剤 1〜15重量部
(e)紫外線吸収剤 0.5〜10重量部
【0006】
【発明の実施の形態】
本発明を詳細に説明する。
本発明の一構成要件である熱可塑性樹脂成形品は、塩化ビニル系樹脂、ポリエチレン、ポリプロピレン、塩素化ポリエチレン、ポリエステル、ポリスチレン、ABS等の熱可塑性樹脂からなり、通常、これらの樹脂は、可塑剤、安定剤、充填剤、着色剤等各種の添加剤が配合された樹脂組成物として用いられる。特に、塩化ビニル系樹脂は、各種配合剤が添加され、硬質塩化ビニル系樹脂組成物、軟質塩化ビニル系樹脂組成物として用いられる。
【0007】
本発明の樹脂複合体では、これらの内でも、後述する軟質塩化ビニル系樹脂組成物と相溶性又は親和性のある硬質塩化ビニル系樹脂組成物、軟質塩化ビニル系樹脂組成物、塩素化ポリエチレン、ABS等から成形された成形品であるのが望ましい。成形品の形状及び成形方法は、特に限定されるものではないが、後述する軟質塩化ビニル系樹脂組成物と積層するため、加工の容易な押出成形品であるのが望ましい。
【0008】
また、塩化ビニル系樹脂は、塩化ビニル又は塩化ビニルとこれに共重合可能なコモノマーとの混合物を懸濁重合法、塊状重合法、微細懸濁重合法又は乳化重合法等通常の方法によって製造されたものすべてが用いられる。コモノマーとしては、例えば、酢酸ビニル、プロピオン酸ビニル、ラウリン酸ビニル等のビニルエステル類、メチルアクリレート、エチルアクリレート、ブチルアクリレート等のアクリル酸エステル類、メチルメタクリレート、エチルメタクリレート等のメタクリル酸エステル類、ジブチルマレエート、ジエチルマレエート等のマレイン酸エステル類、ジブチルフマレート、ジエチルフマレート等のフマール酸エステル類、ビニルメチルエーテル、ビニルブチルエーテル、ビニルオクチルエーテル等のビニルエーテル類、アクリロニトリル、メタクリロニトリル等のシアン化ビニル類、エチレン、プロピレン、スチレン等のα−オレフィン類、塩化ビニリデン、臭化ビニル等の塩化ビニル以外のハロゲン化ビニリデン又はハロゲン化ビニル類、ジアリルフタレート、エチレングリコールジメタクリレート等の多官能性単量体が挙げられ、勿論、コモノマーは、上述のものに限定されるものではない。コモノマーは、塩化ビニル系樹脂の構成成分中30重量%以下、好ましくは20重量%以下の範囲である。又、塩化ビニル系樹脂は、グラフト重合体であっても、塩素化塩化ビニル樹脂であってもよく、さらにはこれらの混合物であっても良い。
【0009】
本発明に於いて、熱可塑性樹脂成形品に積層するための軟質塩化ビニル系樹脂組成物は、上述の塩化ビニル系樹脂をそのまま樹脂成分として用いることができ、該組成物に使用する塩化ビニル系樹脂の平均重合度は、特に限定されるものではないが、JIS K6721に基づいた平均重合度が400〜4500の範囲、特に700〜1300の範囲にあるのものを使用するのが好ましい。平均重合度が低くすぎると耐候性が劣る傾向にあり、また、逆に高すぎると成形し難くなると言う問題が生ずる。
【0010】
軟質塩化ビニル系樹脂組成物に使用する可塑剤は、リン酸エステル系可塑剤とエポキシ系可塑剤を併用することが必須であって、この何れかが欠けても良好な木質感及び耐候性を得ることが出来ない。可塑剤の使用量は、塩化ビニル系樹脂100重量部に対して15〜200重量部の範囲が適当であり、このうちリン酸エステル系可塑剤は1〜15重量部の範囲、好ましくは1〜10重量部の範囲で、又、エポキシ系可塑剤は、1〜15重量部の範囲、好ましくは1.5〜12重量部の範囲で添加される。可塑剤は、これら2種類のみではなく、軟質塩化ビニル系樹脂組成物の可塑化効率、経済性等を考慮し、他の可塑剤も用いられ、合計量で15〜200重量部の範囲になればよい。可塑剤の添加量が15重量部よりも少ないと柔軟性に劣り、木質感が充分に発揮できず、又耐候劣化が速くなる傾向にある。
【0011】
リン酸エステル系可塑剤としては、例えば、トリブチルホスフェート、トリクレジルホスフェート(TCP)、トリフェニルホスフェート、トリキシレニルホスフェート、トリオクチルホスフェート、オクチルジフェニルホスフェート、クレジルジフェニルホスフェート、トリブトキシエチルホスフェート、トリクロロエチルホスフェート、トリス(2−クロロプロピル)ホスフェート、トリス(2,3−ジクロロプロピル)ホスフェート、トリス(2,3−ジブロモプロピル)ホスフェート、トリス(ブロモクロロプロピル)ホスフェート、ビス(2,3−ジブロモプロピル)−2,3−ジクロロプロピルホスフェート、ビス(クロロプロピル)モノオクチルホスフェート、含ハロゲンポリホスフェート等が挙げられ、これらは二種類以上を混合して使用しても良い。
リン酸エステル系可塑剤は、長期間使用時に於ける可塑剤等のブリードによる樹脂複合体の外観汚染を防止しする作用があり、長期にわたって木質感を維持し、且つエポキシ系可塑剤と相俟って耐候性を維持する。リン酸エステル系可塑剤の添加量が1重量部に満たないと、樹脂複合体の汚染防止効果が充分ではなく、15重量部を超えて添加しても経済的に不利である。
【0012】
また、エポキシ系可塑剤としては、例えば、エポキシ化大豆油、エポキシ化アマニ油、エポキシ化魚油、エポキシ化トール油脂肪酸エステル、エポキシ化牛脂油、エポキシ化ヒマシ油、エポキシ化サフラワー油、エポキシ化アマニ油脂肪酸ブチル、液状エポキシ樹脂等が挙げられ、これらは二種類以上を混合して使用しても良い。
エポキシ系可塑剤は、通常、耐候性改良剤として用いられるが、リン酸エステル系可塑剤と相俟って、より耐候性の長期維持に役立つ。エポキシ系可塑剤の添加量が1重量部未満であると、熱安定性の不足から耐候劣化が進みやすく、又、15重量部を超えて添加しても、耐候性等の更なる向上は認められない。
【0013】
他の可塑剤は、上述の可塑剤以外に、塩化ビニル系樹脂に通常使用するものが使用され、例えば、ジブチルフタレート(DBP)、ジヘキシルフタレート、ジ−2−エチルヘキシルフタレート(DOP)、ジ−n−オクチルフタレート、ジイソノニルフタレート、ジイソデシルフタレート、ブチルベンジルフタレート、又は炭素原子数11〜13程度の高級アルコールのフタル酸エステル等のフタル酸エステル系可塑剤;ジ−2−エチルヘキシルアジペート、ジ−n−オクチルアジペート、ジイソノニルアジペート、ジ−n−デシルアジペート、ジイソデシルアジペート、ジ−2−エチルヘキシルアゼレート、ジブチルセバケート、ジ−2−エチルヘキシルセバケート等の脂肪族二塩基酸エステル系可塑剤;トリ−2−エチルヘキシルトリメリテート、トリ−n−オクチルトリメリテート、トリデシルトリメリテート、トリイソデシルトリメリテート、ジ−n−オクチル−n−デシルトリメリレート等のトリメリット酸エステル系可塑剤;2,3,3’,4’−ビフェニルテトラカルボン酸テトラへプチルエステル等のビフェニルテトラカルボン酸テトラアルキルエステル系可塑剤;アジピン酸、セバシン酸等の脂肪族二塩基酸、フタル酸等の芳香族二塩基酸と1,2−プロパンジオール、1,2−ブタンジオール、1,3−ブタンジオール、1,4−ブタンジオール、2,2−ジメチル−1,3−プロパンジオール、1,6−ヘキサンジオール等の脂肪族系グリコールとをエステル化して得られるポリエステル系可塑剤;塩素化パラフィン;五塩化ステアリン酸アルキルエステル等の塩素化脂肪酸エステル等を挙げることができ、これらの一種又は二種以上を混合して使用することができる。
【0014】
軟質塩化ビニル系樹脂組成物に配合される木粉は、天然木材、籾殻、パルプ等を微粉砕したものが用いられる。天然木材としては、その原木の種類に特に限定されるものではなく、針葉樹、広葉樹、ラワン等のいかなるものでも使用できる。また、木粉の粒径は、細かいほど望ましく、平均粒径100μm以下であるのが好ましい。添加量は、少ないと木質感に乏しく、多いと成形時の負荷が高く、例えば、押出成形の場合、押出成形スピードが低下する。そのため、塩化ビニル系樹脂100重量部に対して、3〜100重量部の範囲が適当であり、特に5〜60重量部の範囲であるのが好ましい。
【0015】
軟質塩化ビニル系樹脂組成物に配合される熱安定剤は、Ba、Zn、Ca、Sn、Al又はMgから選択される少なくとも一種類の金属元素を含む熱安定剤が使用される。特に、これら金属元素のみを含有する熱安定剤が好ましい。具体的にはこれら金属元素を含む金属石鹸、Ba−Zn系複合熱安定剤、Ca−Zn系複合熱安定剤、Al−Mg系複合熱安定剤又はSn系熱安定剤等が好ましく、これらは二種類以上を併用しても良い。
熱安定剤として、例えば、Cd−Zn系熱安定剤、Pb系熱安定剤等も有効であるが、これら熱安定剤は、毒性があったり、耐候性の劣化が速いという問題があり、通常、樹脂複合体の表皮として使用される軟質塩化ビニル系樹脂組成物には使用することができない。
熱安定剤の使用量は、塩化ビニル系樹脂100重量部に対して1〜15重量部、好ましくは1.5〜6重量部の範囲が適当である。1重量部未満では、熱安定性の効果に乏しく、樹脂複合体の耐候性等の諸物性を維持することができない。また、15重量部より多く使用しても、添加量に比例した熱安定性の効果が発揮されるわけでもなく、コスト面を考慮して上述の範囲にするのが望ましい。
【0016】
また、軟質塩化ビニル系樹脂組成物には、紫外線吸収剤を含有せしめることを必須としてる。紫外線吸収剤としては、例えばフェニルサリシレート、t−ブチルフェニルサリシレート等のサリシレート系紫外線吸収剤、レゾルシノールモノベンゾエート等のベンゾエート系紫外線吸収剤、2−ヒドロキシ−4−オクトキシベンゾフェノン、2,2’−ジヒドロキシ−4,4’−ジメトキシベンゾフェノン、2,4−ジヒドロキシベンゾフェノン、2,2’,4’4−テトラヒドロキシベンゾフェノン、2−ヒドロキシ−4−メトキシベンゾフェノン等のベンゾフェノン系紫外線吸収剤、2(2’−ヒドロキシ−5’−メチルフェニル)ベンゾトリアゾール等のベンゾトリアゾール系紫外線吸収剤、エチル−2−シアノ−3、3’−ジフェニルアクリレート等のシアノアクリレート系紫外線吸収剤等が挙げられ、これらを単独又は二種類以上を混合して使用される。
紫外線吸収剤の含有量は、塩化ビニル系樹脂100重量部に対して、0.5〜10重量部、好ましくは1.5〜6重量部の範囲から適宜選択される。含有量が0.5重量部未満では紫外線吸収能が不十分であり、一方、10重量部を越えても添加量に見合った効果の発揮は少なくなる。
【0017】
本発明の軟質塩化ビニル系樹脂組成物は、通常、着色剤を添加して使用される場合が多い。着色剤としては、例えば、チタンホワイト、カーボンブラック、酸化鉄レッド、コバルトブルー、チタニウムイエロー、チタンブラック、紺青等の無機系顔料、キナクリドンレッド、ジオキサジンバイオレッド、ペリレンレッド、ペリレンパーミリオン、ペリレンスカーレット、ペリノンオレンジ、アゾレッド、イソインドリノンイエロー、シアニングリーン等の有機系顔料が挙げられる。勿論、着色剤は、上述のものに限定されるものではない。
着色剤の添加量は、木粉の添加量によって異なるけれども、塩化ビニル系樹脂100重量部当たり、15重量部以下、好ましくは1〜10重量部の範囲が適当であろう。
【0018】
軟質塩化ビニル系樹脂組成物には、上記添加剤の他、更に必要に応じて周知の各種添加剤、例えば、滑剤、充填剤、衝撃改質剤、耐熱向上剤、酸化防止剤、帯電防止剤等を、軟質塩化ビニル系樹脂組成物の諸物性を損なわない範囲で、併用することができる。
【0019】
軟質塩化ビニル系樹脂組成物は、上述の(a)〜(e)の各構成成分及び必要に応じ各種添加剤を混合機又は混練機に投入し、均一に混合又は混練することによって調製される。組成物は、粉末状であってもペレット状であっても良い。
上述の配合成分を混合するのに用いる装置は、実質的に均一に混合できるなら如何なる装置でもよく、例えば、ヘンシェルミキサー、リボンブレンダー、プラネタリーミキサー、万能混合機等の混合機等が挙げられ、また、混合物を混練するには、例えば、単軸押出機、二軸押出機、オープンロール、バンバリーミキサー、ニーダー、加圧ニーダー、インテンシブミキサー等の加熱しながら剪断力下、混練出来る装置が使用される。
【0020】
本発明の樹脂複合体は、熱可塑性樹脂成形品に上述の軟質塩化ビニル系樹脂組成物を積層して構成される。樹脂複合体を製造するには、特にその製造方法に限定されるものではないが、例えば、熱可塑性樹脂成形品の樹脂材料及び軟質塩化ビニル系樹脂組成物それぞれから成形品を製造し、これらを熱融着あるいは接着剤を介して積層する方法、熱可塑性樹脂成形品の樹脂材料と軟質塩化ビニル系樹脂組成物を別々に押出し、金型内又は金型外近傍で積層する共押出成形する方法、熱可塑性樹脂成形品をインサートして射出成形する方法、同時射出成形する方法等各種の方法が採用される。
【0021】
本発明の樹脂複合体は、異なった着色剤を含有した軟質塩化ビニル系樹脂組成物を二種類以上を、熱可塑性樹脂成形品に積層して、より美麗な木目模様を出現させることもできる。該複合体は、例えば、二種類の軟質塩化ビニル系樹脂組成物を別々に又は混合して、熱可塑性樹脂成形品の樹脂材料と共に共押出しすることによって製造するのが簡単である。この際、軟質塩化ビニル系樹脂組成物は、ペレットにしておくのが望ましい。
【0022】
本発明の樹脂複合体は、建築用内外装部材、車両用内外装部材、電機照明機器部品等に有効に利用される。
【0023】
【実施例】
次に本発明の樹脂複合体を実施例にて詳述するが、本発明は、その要旨を逸脱しない限り、以下の実施例に限定されるものではない。
実施例1〜6、比較例1〜6
<熱可塑性樹脂成形品の樹脂材料の調製>
平均重合度1030の塩化ビニル樹脂100重量部、三塩基性硫酸鉛3重量部、ステアリン酸鉛3重量部、アクリル系衝撃改良剤(商標:メタブレンS2001、三菱レイヨン(株)製)3重量部、アクリル系加工助剤(商標:メタブレンP551A、三菱レイヨン(株)製)2重量部、膠質炭酸カルシウム(平均粒径0.08μm)10重量部をヘンシェルミキサーに投入して高速撹拌混合し、均一に配合し、その配合物を2軸押出機に供給し、C1:140℃、C2:150℃、C3:160℃、D:160℃の温度条件で、ペレット化し硬質塩化ビニル樹脂組成物を調製した。
【0024】
<軟質塩化ビニル系樹脂組成物の調製>
(a)平均重合度1300の塩化ビニル樹脂100重量部、表−1に示す重量部の(b−1)トリキシレニルホスフェート、(b−2)エポキシ化大豆油、(b−3)エポキシ化アマニ油、(b−4)DOP等の可塑剤、(c)木粉(平均粒径70μm)50重量部、表−1に示す重量部の(d−1)Ba−Zn系熱安定剤、(d−2)Ca−Zn系熱安定剤、(d−3)錫マレート系熱安定剤、(d−4)Al−Mg系熱安定剤、(d−5)三塩基性硫酸鉛等の熱安定剤及び表−1に示す重量部の(e)2−ヒドロキシベンゾフェノン、並びにステアリン酸1重量部及びポリアゾ系顔料(茶色)3重量部をヘンシェルミキサーに投入して高速撹拌混合し、均一に配合した。その配合物を2軸押出機に供給し、C1:110℃、C2:120℃、C3:130℃、D:130℃の温度条件で、ペレット化し、軟質塩化ビニル樹脂組成物を調製した。
【0025】
<樹脂複合体の製造>
次ぎに、上記熱可塑性樹脂成形品の樹脂材料を65φ単軸押出機(温度条件、C1:130℃、C2:140℃、C3:150℃、C4:160℃、D:160℃)に、及び上記軟質塩化ビニル系樹脂組成物を30φ単軸押出機(温度条件、C1:100℃、C2:110℃、C3:120℃、D:160℃)にそれぞれ投入し、共押出しにより、熱可塑性樹脂成形品2.6mm厚、その全周に0.2mm厚の軟質塩化ビニル樹脂組成物に被覆された3mm厚の樹脂複合体を製造した。
【0026】
比較例7
実施例1と同一の軟質塩化ビニル樹脂組成物単一の3mm厚の樹脂成形品を押出成形によって製造した。
比較例8
実施例1の軟質塩化ビニル系樹脂組成物から木粉を除いた組成物を用いて、実施例1と同様にして樹脂複合体を製造した。
このようにして得た樹脂複合体及び樹脂成形品を品質評価に供し、その結果を表−1に示した。
【0027】
品質評価
耐候性A;アイスーパーUVテスター(型式SUV−W11、岩崎電気(株)製)を用い、ブラックパネル温度63℃、照射/結露=5時間/1時間の条件で、所定時間後の色調変化を目視で評価した。
○:300時間経過しても変色が認められない。
△:200時間経過で変色が認められる。
×:100時間経過で変色が認められる。
【0028】
耐候性B;サンシャインウェザーメーター(型式WEL−SUN−HCH、スガ試験機(株)製を用い、ブラックパネル温度63℃、噴霧サイクル12分/60分の条件で試験し、2000時間後の色差(△E)をクラボウ(株)製、型式AUCOLOR VP−1で測定した。
○:2000時間経過後 △E=3未満
△:2000時間経過後 △E=3〜10
×:2000時間経過後 △E=10より大
【0029】
衝撃値;JIS K−7111に基づき、シャルピー衝撃試験を行った(単位:kg−cm/cm2 )。
引張強さ;JIS K−7113に基づき、引張試験を行い、その最大引張強さを引張強さとした。単位:kg/cm2
表面粗さ;木質感の指針として、JIS B0601に基づき、中心線表面平均粗さを測定した。値の大きい方が木質感有り。単位:μm。
【0030】
【表1】

Figure 0003740815
【0031】
【発明の効果】
本発明の樹脂複合体は、熱可塑性樹脂成形品に、耐候性の優れた木粉が混合された軟質塩化ビニル樹脂組成物が積層されているので、木質感に溢れ、耐候性が良く、高い物理的特性を有する。デッキ材、サイジング材等の屋外建材用途として極めて好適である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin composite having an appearance very similar to natural wood, which is composed of a thermoplastic resin molded article and a soft vinyl chloride resin composition, and has excellent weather resistance.
[0002]
[Prior art]
Thermoplastic resin compositions using finely pulverized wood powder as a filler have been known for a long time, and in particular, vinyl chloride resin compositions have excellent colorability and moldability, and are relatively inexpensive. Widely used. A product in which wood powder and a vinyl chloride resin composition are mixed has the characteristics of wood and vinyl chloride resin, has a high design with a wood texture, and is used for interior building materials.
[0003]
However, in order to improve the wood texture of the product, it is necessary to mix a large amount of wood flour, and the physical properties such as weather resistance and impact resistance of the vinyl chloride resin composition are significantly reduced. For example, as disclosed in JP-A-62-86042, various attempts have been made to improve impact resistance, but the impact resistance is higher than that of a vinyl chloride resin composition to which no wood flour is added. Extremely low. In addition, the weather resistance is still low in level, limited to indoor use, and when used outdoors, a method of coating with urethane-based paint is adopted, but the painting cost is high and work There were also disadvantages such as inconvenience in terms of environmental sanitation.
[0004]
[Problems to be solved by the invention]
As a result of intensive investigations to obtain a resin molded product having a wood texture, little physical property degradation, and excellent weather resistance that can be used outdoors, the present inventors contain wood powder on the surface of the resin molded product. The present inventors have found that a product coated with a soft vinyl chloride resin composition having good weather resistance can achieve the above-mentioned object, and has completed the present invention.
That is, an object of the present invention is to provide a resin composite that is full of wood texture and has excellent weather resistance and physical properties.
[0005]
[Means for Solving the Problems]
Thus, the gist of the present invention resides in a resin composite obtained by laminating a soft vinyl chloride resin composition mainly composed of the following (a) to (e) on a thermoplastic resin molded article.
(A) Vinyl chloride resin 100 parts by weight (b) Plasticizer (total amount of the following plasticizers) 15 to 200 parts by weight Phosphate ester plasticizer 1 to 15 parts by weight Epoxy plasticizer 1 to 15 parts by weight Other plastics Agent Remaining amount (c) Wood flour 3 to 100 parts by weight (d) Thermal stabilizer containing at least one metal element selected from Ba, Zn, Ca, Sn, Al or Mg 1 to 15 parts by weight (e) UV absorber 0.5 to 10 parts by weight [0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail.
The thermoplastic resin molded article which is one constituent element of the present invention is made of a thermoplastic resin such as vinyl chloride resin, polyethylene, polypropylene, chlorinated polyethylene, polyester, polystyrene, ABS, and usually these resins are plasticizers. In addition, it is used as a resin composition in which various additives such as stabilizers, fillers, and colorants are blended. In particular, various compounding agents are added to the vinyl chloride resin and used as a hard vinyl chloride resin composition and a soft vinyl chloride resin composition.
[0007]
Among these, in the resin composite of the present invention, among these, a hard vinyl chloride resin composition, a soft vinyl chloride resin composition, a chlorinated polyethylene, It is desirable that the molded product is molded from ABS or the like. The shape of the molded product and the molding method are not particularly limited. However, since it is laminated with a soft vinyl chloride resin composition to be described later, it is desirable that the molded product be an extruded product that can be easily processed.
[0008]
The vinyl chloride resin is produced by a usual method such as suspension polymerization, bulk polymerization, fine suspension polymerization or emulsion polymerization of vinyl chloride or a mixture of vinyl chloride and a comonomer copolymerizable therewith. All that is used. Examples of the comonomer include vinyl esters such as vinyl acetate, vinyl propionate and vinyl laurate, acrylic acid esters such as methyl acrylate, ethyl acrylate and butyl acrylate, methacrylic acid esters such as methyl methacrylate and ethyl methacrylate, and dibutyl. Maleates such as maleate and diethyl maleate, fumaric esters such as dibutyl fumarate and diethyl fumarate, vinyl ethers such as vinyl methyl ether, vinyl butyl ether and vinyl octyl ether, cyan such as acrylonitrile and methacrylonitrile Vinyl halides, α-olefins such as ethylene, propylene and styrene, vinylidene chlorides and vinyl halides other than vinyl chloride such as vinylidene chloride and vinyl bromide Diallyl phthalate, polyfunctional monomers such as ethylene glycol dimethacrylate and the like, of course, the comonomer is not limited to those described above. A comonomer is 30 weight% or less in the structural component of a vinyl chloride resin, Preferably it is the range of 20 weight% or less. The vinyl chloride resin may be a graft polymer, a chlorinated vinyl chloride resin, or a mixture thereof.
[0009]
In the present invention, the soft vinyl chloride resin composition for laminating on a thermoplastic resin molded product can use the above vinyl chloride resin as a resin component as it is, and the vinyl chloride resin used in the composition. The average degree of polymerization of the resin is not particularly limited, but it is preferable to use a resin having an average degree of polymerization based on JIS K6721 in the range of 400 to 4500, particularly in the range of 700 to 1300. If the average degree of polymerization is too low, the weather resistance tends to be inferior. On the other hand, if the degree of polymerization is too high, there is a problem that molding becomes difficult.
[0010]
The plasticizer used in the soft vinyl chloride resin composition is required to use a phosphate ester plasticizer and an epoxy plasticizer in combination, and even if any of these is missing, good wood texture and weather resistance can be obtained. I can't get it. The amount of the plasticizer used is suitably in the range of 15 to 200 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. Of these, the phosphate ester plasticizer is in the range of 1 to 15 parts by weight, preferably 1 to 1 part by weight. The epoxy plasticizer is added in the range of 1 to 15 parts by weight, preferably 1.5 to 12 parts by weight, in the range of 10 parts by weight. In addition to these two types of plasticizers, other plasticizers are also used in consideration of the plasticization efficiency and economy of the soft vinyl chloride resin composition, and the total amount can be in the range of 15 to 200 parts by weight. That's fine. When the added amount of the plasticizer is less than 15 parts by weight, the flexibility is inferior, the wood texture cannot be fully exhibited, and the weather resistance tends to be accelerated.
[0011]
Examples of phosphate ester plasticizers include tributyl phosphate, tricresyl phosphate (TCP), triphenyl phosphate, trixylenyl phosphate, trioctyl phosphate, octyl diphenyl phosphate, cresyl diphenyl phosphate, tributoxyethyl phosphate, trichloro Ethyl phosphate, tris (2-chloropropyl) phosphate, tris (2,3-dichloropropyl) phosphate, tris (2,3-dibromopropyl) phosphate, tris (bromochloropropyl) phosphate, bis (2,3-dibromopropyl) ) -2,3-dichloropropyl phosphate, bis (chloropropyl) monooctyl phosphate, halogen-containing polyphosphate, and the like. Mixed and may also be used.
Phosphate plasticizers have the effect of preventing the appearance of resin composites from being contaminated by bleeds such as plasticizers when used for a long period of time. Maintain the weather resistance. If the addition amount of the phosphoric ester plasticizer is less than 1 part by weight, the effect of preventing contamination of the resin composite is not sufficient, and even if it exceeds 15 parts by weight, it is economically disadvantageous.
[0012]
Examples of the epoxy plasticizer include epoxidized soybean oil, epoxidized linseed oil, epoxidized fish oil, epoxidized tall oil fatty acid ester, epoxidized beef tallow oil, epoxidized castor oil, epoxidized safflower oil, and epoxidized Examples thereof include linseed oil fatty acid butyl, liquid epoxy resin, and the like.
Epoxy plasticizers are usually used as weather resistance improvers, but in combination with phosphate ester plasticizers, they help to maintain weather resistance for a long period of time. When the addition amount of the epoxy plasticizer is less than 1 part by weight, the weather resistance deterioration is likely to proceed due to the lack of thermal stability, and even if it exceeds 15 parts by weight, further improvement in weather resistance etc. is recognized. I can't.
[0013]
As the other plasticizers, those usually used for vinyl chloride resins other than the above-mentioned plasticizers are used. For example, dibutyl phthalate (DBP), dihexyl phthalate, di-2-ethylhexyl phthalate (DOP), di-n Phthalate plasticizers such as octyl phthalate, diisononyl phthalate, diisodecyl phthalate, butyl benzyl phthalate, or phthalates of higher alcohols having about 11 to 13 carbon atoms; di-2-ethylhexyl adipate, di-n-octyl Aliphatic dibasic ester plasticizers such as adipate, diisononyl adipate, di-n-decyl adipate, diisodecyl adipate, di-2-ethylhexyl azelate, dibutyl sebacate, di-2-ethylhexyl sebacate; Ethylhexyl trime Trimellitic acid ester plasticizers such as tate, tri-n-octyl trimellitate, tridecyl trimellitate, triisodecyl trimellitate, di-n-octyl-n-decyl trimellitate; 2, 3, Biphenyltetracarboxylic acid tetraalkyl ester plasticizers such as 3 ′, 4′-biphenyltetracarboxylic acid tetraheptyl ester; aliphatic dibasic acids such as adipic acid and sebacic acid, and aromatic dibasic acids such as phthalic acid; Fats such as 1,2-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,2-dimethyl-1,3-propanediol, 1,6-hexanediol Polyester-based plasticizers obtained by esterification with aliphatic glycols; chlorinated paraffins; alkyl pentastearic acid esters, etc. A chlorinated fatty acid ester etc. can be mentioned, These 1 type or 2 types or more can be mixed and used.
[0014]
The wood powder blended in the soft vinyl chloride resin composition is a finely pulverized natural wood, rice husk, pulp or the like. The natural wood is not particularly limited to the type of the raw wood, and any wood such as conifers, hardwoods, and lauans can be used. Further, the finer the particle size of the wood flour, the better, and the average particle size is preferably 100 μm or less. If the addition amount is small, the wood texture is poor, and if it is large, the load during molding is high. For example, in the case of extrusion molding, the extrusion molding speed decreases. Therefore, the range of 3 to 100 parts by weight is appropriate for 100 parts by weight of the vinyl chloride resin, and the range of 5 to 60 parts by weight is particularly preferable.
[0015]
As the heat stabilizer blended in the soft vinyl chloride resin composition, a heat stabilizer containing at least one metal element selected from Ba, Zn, Ca, Sn, Al, or Mg is used. In particular, a heat stabilizer containing only these metal elements is preferable. Specifically, metal soaps containing these metal elements, Ba—Zn based composite heat stabilizers, Ca—Zn based composite heat stabilizers, Al—Mg based composite heat stabilizers, Sn based heat stabilizers, and the like are preferable. Two or more types may be used in combination.
As the heat stabilizer, for example, a Cd—Zn heat stabilizer, a Pb heat stabilizer, and the like are also effective. However, these heat stabilizers are problematic in that they are toxic and have a rapid deterioration in weather resistance. It cannot be used for a soft vinyl chloride resin composition used as the skin of a resin composite.
The amount of the heat stabilizer used is 1 to 15 parts by weight, preferably 1.5 to 6 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If it is less than 1 part by weight, the effect of thermal stability is poor, and various physical properties such as weather resistance of the resin composite cannot be maintained. Moreover, even if it uses more than 15 weight part, the effect of the thermal stability proportional to the addition amount is not exhibited, and it is desirable to make it into the above-mentioned range in consideration of cost.
[0016]
Further, it is essential that the soft vinyl chloride resin composition contains an ultraviolet absorber. Examples of the UV absorber include salicylate UV absorbers such as phenyl salicylate and t-butylphenyl salicylate, benzoate UV absorbers such as resorcinol monobenzoate, 2-hydroxy-4-octoxybenzophenone, and 2,2′-dihydroxy. Benzophenone ultraviolet absorbers such as -4,4'-dimethoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2 ', 4'4-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2 (2'- Benzotriazole ultraviolet absorbers such as hydroxy-5′-methylphenyl) benzotriazole, and cyanoacrylate ultraviolet absorbers such as ethyl-2-cyano-3,3′-diphenylacrylate, etc. Mix more than types Used.
Content of a ultraviolet absorber is suitably selected from the range of 0.5-10 weight part with respect to 100 weight part of vinyl chloride resin, Preferably it is 1.5-6 weight part. If the content is less than 0.5 parts by weight, the ultraviolet absorbing ability is insufficient. On the other hand, if the content exceeds 10 parts by weight, the effect corresponding to the addition amount is reduced.
[0017]
The soft vinyl chloride resin composition of the present invention is usually often used with a colorant added. Examples of the colorant include inorganic pigments such as titanium white, carbon black, iron oxide red, cobalt blue, titanium yellow, titanium black, and bitumen, quinacridone red, dioxazine bio red, perylene red, perylene per million, and perylene scarlet. Organic pigments such as perinone orange, azo red, isoindolinone yellow, and cyanine green. Of course, the colorant is not limited to those described above.
Although the addition amount of the colorant varies depending on the addition amount of the wood flour, the range of 15 parts by weight or less, preferably 1 to 10 parts by weight per 100 parts by weight of the vinyl chloride resin will be appropriate.
[0018]
In addition to the above-mentioned additives, the soft vinyl chloride resin composition further includes various known additives such as lubricants, fillers, impact modifiers, heat resistance improvers, antioxidants, antistatic agents. Can be used in combination as long as the physical properties of the soft vinyl chloride resin composition are not impaired.
[0019]
The soft vinyl chloride resin composition is prepared by introducing the above-described components (a) to (e) and various additives as necessary into a mixer or kneader, and uniformly mixing or kneading. . The composition may be in powder form or pellet form.
The apparatus used for mixing the above-described blending components may be any apparatus as long as it can be mixed substantially uniformly, such as a Henschel mixer, a ribbon blender, a planetary mixer, a universal mixer, etc. In order to knead the mixture, for example, a single-screw extruder, a twin-screw extruder, an open roll, a Banbury mixer, a kneader, a pressure kneader, an intensive mixer, or the like that can be kneaded under shearing force while heating is used. The
[0020]
The resin composite of the present invention is constituted by laminating the above-mentioned soft vinyl chloride resin composition on a thermoplastic resin molded article. The production of the resin composite is not particularly limited to the production method thereof. For example, a molded product is produced from each of the resin material of the thermoplastic resin molded product and the soft vinyl chloride resin composition. A method of laminating via heat fusion or an adhesive, a method of coextrusion molding in which a resin material of a thermoplastic resin molded product and a soft vinyl chloride resin composition are extruded separately and laminated in or near the mold Various methods such as a method of injection molding by inserting a thermoplastic resin molded article and a method of simultaneous injection molding are employed.
[0021]
In the resin composite of the present invention, two or more kinds of soft vinyl chloride resin compositions containing different colorants can be laminated on a thermoplastic resin molded article to make a more beautiful wood grain pattern appear. The composite is easy to manufacture by, for example, coextruding two kinds of soft vinyl chloride resin compositions separately or mixed together with a resin material of a thermoplastic resin molded article. At this time, the soft vinyl chloride resin composition is preferably pelletized.
[0022]
The resin composite of the present invention is effectively used for building interior / exterior members, vehicle interior / exterior members, electric lighting equipment components, and the like.
[0023]
【Example】
Next, although the resin composite of this invention is explained in full detail in an Example, this invention is not limited to a following example, unless it deviates from the summary.
Examples 1-6, Comparative Examples 1-6
<Preparation of resin material for thermoplastic resin molding>
100 parts by weight of vinyl chloride resin having an average degree of polymerization of 1030, 3 parts by weight of tribasic lead sulfate, 3 parts by weight of lead stearate, 3 parts by weight of an acrylic impact modifier (trademark: Metabrene S2001, manufactured by Mitsubishi Rayon Co., Ltd.) 2 parts by weight of acrylic processing aid (trade name: Metabrene P551A, manufactured by Mitsubishi Rayon Co., Ltd.) and 10 parts by weight of colloidal calcium carbonate (average particle size: 0.08 μm) are charged into a Henschel mixer and mixed at high speed. The resulting mixture was fed into a twin screw extruder and pelletized to prepare a hard vinyl chloride resin composition under the temperature conditions of C1: 140 ° C, C2: 150 ° C, C3: 160 ° C, D: 160 ° C. .
[0024]
<Preparation of soft vinyl chloride resin composition>
(A) 100 parts by weight of vinyl chloride resin having an average degree of polymerization of 1300, parts by weight of (b-1) trixylenyl phosphate, (b-2) epoxidized soybean oil, (b-3) epoxidation shown in Table 1 Linseed oil, (b-4) plasticizers such as DOP, (c) 50 parts by weight of wood flour (average particle size 70 μm), (d-1) Ba—Zn heat stabilizer in parts by weight shown in Table 1. (D-2) Ca-Zn heat stabilizer, (d-3) tin malate heat stabilizer, (d-4) Al-Mg heat stabilizer, (d-5) tribasic lead sulfate, etc. The heat stabilizer and parts by weight of (e) 2-hydroxybenzophenone shown in Table 1 as well as 1 part by weight of stearic acid and 3 parts by weight of polyazo pigment (brown) are charged into a Henschel mixer and mixed at high speed with stirring. Blended. The blend was supplied to a twin screw extruder and pelletized under the temperature conditions of C1: 110 ° C., C2: 120 ° C., C3: 130 ° C., D: 130 ° C. to prepare a soft vinyl chloride resin composition.
[0025]
<Manufacture of resin composite>
Next, the resin material of the thermoplastic resin molded article is transferred to a 65φ single screw extruder (temperature conditions, C1: 130 ° C, C2: 140 ° C, C3: 150 ° C, C4: 160 ° C, D: 160 ° C), and The soft vinyl chloride resin composition is put into a 30φ single screw extruder (temperature conditions, C1: 100 ° C., C2: 110 ° C., C3: 120 ° C., D: 160 ° C.) and co-extruded to obtain a thermoplastic resin. A molded product of 2.6 mm thickness and a 3 mm thick resin composite coated with a 0.2 mm thick soft vinyl chloride resin composition on the entire circumference were produced.
[0026]
Comparative Example 7
The same soft vinyl chloride resin composition as in Example 1 was produced by extrusion molding a single 3 mm thick resin molded product.
Comparative Example 8
A resin composite was produced in the same manner as in Example 1 using the composition obtained by removing wood flour from the soft vinyl chloride resin composition of Example 1.
The resin composite and resin molded product thus obtained were subjected to quality evaluation, and the results are shown in Table-1.
[0027]
Quality evaluation Weather resistance A: Eye super UV tester (model SUV-W11, manufactured by Iwasaki Electric Co., Ltd.), black panel temperature 63 ° C, irradiation / condensation = 5 hours / 1 hour, color tone after a predetermined time Changes were assessed visually.
○: No discoloration was observed even after 300 hours.
Δ: Discoloration is observed after 200 hours.
X: Discoloration is recognized after 100 hours.
[0028]
Weather resistance B: Sunshine weather meter (model WEL-SUN-HCH, manufactured by Suga Test Instruments Co., Ltd.), tested under conditions of a black panel temperature of 63 ° C. and a spray cycle of 12 minutes / 60 minutes, and the color difference after 2000 hours ( ΔE) was measured by Kurabo Industries Co., Ltd. model AUCOLOR VP-1.
○: After 2000 hours ΔE = less than 3 Δ: After 2000 hours ΔE = 3-10
×: After 2000 hours ΔE is greater than 10
Impact value: Charpy impact test was conducted based on JIS K-7111 (unit: kg-cm / cm 2 ).
Tensile strength: Based on JIS K-7113, a tensile test was performed, and the maximum tensile strength was taken as the tensile strength. Unit: kg / cm 2 .
Surface roughness: The centerline surface average roughness was measured based on JIS B0601 as a guideline for wood texture. Larger values have a wood texture. Unit: μm.
[0030]
[Table 1]
Figure 0003740815
[0031]
【The invention's effect】
The resin composite of the present invention is laminated with a soft vinyl chloride resin composition in which wood powder having excellent weather resistance is mixed with a thermoplastic resin molded article. Has physical properties. It is extremely suitable for outdoor building materials such as deck materials and sizing materials.

Claims (4)

熱可塑性樹脂成形品に、下記(a)〜(e)を主成分とする軟質塩化ビニル系樹脂組成物が積層されてなる樹脂複合体。
(a)塩化ビニル系樹脂 100重量部
(b)可塑剤(次の可塑剤合計量) 15〜200重量部
リン酸エステル系可塑剤 1〜15重量部
エポキシ系可塑剤 1〜15重量部
その他可塑剤 残量
(c)木粉 3〜100重量部
(d)Ba、Zn、Ca、Sn、Al又はMgから選択される少なくとも
一種類の金属元素を含む熱安定剤 1〜15重量部
(e)紫外線吸収剤 0.5〜10重量部
A resin composite obtained by laminating a soft vinyl chloride resin composition mainly composed of the following (a) to (e) on a thermoplastic resin molded article.
(A) Vinyl chloride resin 100 parts by weight (b) Plasticizer (total amount of the following plasticizers) 15 to 200 parts by weight Phosphate ester plasticizer 1 to 15 parts by weight Epoxy plasticizer 1 to 15 parts by weight Other plastics Agent Remaining amount (c) Wood flour 3 to 100 parts by weight (d) Thermal stabilizer containing at least one metal element selected from Ba, Zn, Ca, Sn, Al or Mg 1 to 15 parts by weight (e) UV absorber 0.5-10 parts by weight
熱可塑性樹脂成形品の樹脂が、硬質塩化ビニル系樹脂、塩素化ポリエチレン又はABSである請求項1記載の樹脂複合体。The resin composite according to claim 1, wherein the resin of the thermoplastic resin molded article is a hard vinyl chloride resin, chlorinated polyethylene, or ABS. 軟質塩化ビニル系樹脂組成物が、着色剤を含有する請求項1又は請求項2記載の樹脂複合体。The resin composite according to claim 1 or 2, wherein the soft vinyl chloride resin composition contains a colorant. 着色剤を含有する二種類以上の軟質塩化ビニル系樹脂組成物が積層された請求項1乃至請求項3記載の樹脂複合体。The resin composite according to any one of claims 1 to 3, wherein two or more kinds of soft vinyl chloride resin compositions containing a colorant are laminated.
JP34499597A 1997-12-15 1997-12-15 Resin composite Expired - Fee Related JP3740815B2 (en)

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JPH11170452A JPH11170452A (en) 1999-06-29
JP3740815B2 true JP3740815B2 (en) 2006-02-01

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Publication number Priority date Publication date Assignee Title
JP4578664B2 (en) * 1999-10-18 2010-11-10 ミサワホーム株式会社 Plastic film containing wood powder with few surface defects and method for producing the same
EP2375118B1 (en) 2010-04-08 2012-12-19 Fitt Spa Use of a thermoplastic PVC compound with vegetables fillers for manufacturing flexible hoses and method thereof

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