JPWO2017141792A1 - フレーク状ガラス及び樹脂組成物 - Google Patents
フレーク状ガラス及び樹脂組成物 Download PDFInfo
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- JPWO2017141792A1 JPWO2017141792A1 JP2018500064A JP2018500064A JPWO2017141792A1 JP WO2017141792 A1 JPWO2017141792 A1 JP WO2017141792A1 JP 2018500064 A JP2018500064 A JP 2018500064A JP 2018500064 A JP2018500064 A JP 2018500064A JP WO2017141792 A1 JPWO2017141792 A1 JP WO2017141792A1
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- Prior art keywords
- flaky glass
- resin
- binder
- lubricant
- glass
- 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.)
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Abstract
Description
フレーク状ガラス基材と、
前記フレーク状ガラス基材の表面の少なくとも一部を被覆する、結合剤からなる被覆膜と、
を含み、
前記結合剤が、滑剤(ただし、シリコーンを除く)を含む、又は、滑剤とアミノシランとを含み、
前記結合剤における前記滑剤の割合が30質量%以下である、
フレーク状ガラスを提供する。
Al2O3:12〜16
CaO:16〜25
MgO:0〜6
Na2O+K2O:0〜2(好ましくは0〜0.8)
B2O3:5〜13
F2:0〜0.5
59≦SiO2≦65、
8≦Al2O3≦15、
47≦(SiO2−Al2O3)≦57、
1≦MgO≦5、
20≦CaO≦30、
0<(Li2O+Na2O+K2O)<2、
0≦TiO2≦5、
の成分を含有し、B2O3、F、ZnO、BaO、SrO、ZrO2を実質的に含有しないガラス組成を使用できる。当該ガラス組成は、国際公開2006/068255号に、本出願人によって開示されている。
(a)滑剤(ただし、シリコーンを除く)を含むか、又は、
(b)滑剤とアミノシランとを含むか、
のいずれかである。
(フレーク状ガラス)
まず、表1に示す組成を有するEガラスにて、ブロー法によりフレーク状ガラス基材を作製した。具体的には、1200℃以上に加熱した溶解槽にEガラスを入れて溶解し、この溶解槽にノズルを入れ、このノズルから空気を吹き込みながら薄いガラスを作製し、この薄いガラスをローラーで連続的に引き出した。空気の吹き込み量及びローラー回転数を調整し、平均厚さ0.7μmのガラスを得た。その後、粉砕及び分級を行い、平均粒径160μmのフレーク状ガラス基材を得た。
結合剤溶液において、結合剤成分(固形分)に占める滑剤(固形分)の割合が30質量%を超えるように、結合剤溶液における各成分(接着剤及びシランカップリング剤)を調整した点以外は、実施例1と同様の方法にて、比較例1のフレーク状ガラスを得た。なお、フレーク状ガラスにおける結合剤の付着率は、実施例1〜8のフレーク状ガラスと同様の方法で求めた。
結合剤溶液において滑剤を含有せず、結合剤溶液における各成分(接着剤及びシランカップリング剤)を調整した点以外は、実施例1〜8と同様の方法にて、比較例2のフレーク状ガラスを得た。なお、フレーク状ガラスにおける結合剤の付着率は、実施例1〜8のフレーク状ガラスと同様の方法で求めた。
各実施例及び比較例のフレーク状ガラスと、マトリックス樹脂とを押出成形機(株式会社テクノベル製、KZW15−30MG、成形温度:約270〜320℃)にて混練し、補強用の充填材としてのフレーク状ガラスとマトリックス樹脂とを含む樹脂組成物を得た。各実施例及び比較例において、マトリックス樹脂をそれぞれ3種用いた。すなわち、実施例1〜8及び比較例1及び2において、それぞれ3種の樹脂組成物を得た。樹脂組成物を射出成形機(日精樹脂工業株式会社製、HM7)にて成形して、樹脂成形品を得た。得られた樹脂成形品におけるフレーク状ガラスの含有率は50質量%であった。なお、マトリックス樹脂として、ポリアミドであるPA66(東レ株式会社製、アミランCM3001−N)若しくはPA9T(株式会社クラレ ジェネスタN1000A)、又は、変性ポリフェニレネーテルであるPPE(旭化成ケミカルズ ザイロン500V)を用いた。
(フレーク状ガラスの配合しやすさ)
フレーク状ガラスの配合しやすさは、フレーク状ガラスを目開き2mmの篩に入れて篩ったときの、落下のしやすさと篩への付着の度合いを目視にて確認することによって評価した。評価は、以下の表2に従って行った。落下しやすいほど、また篩いへの付着が少ないほど、押出機の部品への付着等に起因するフレーク状ガラスの樹脂への食い込み不良が生じにくく、供給能力の高いフィーダーを使用しなくてもフレーク状ガラスを樹脂に十分に配合させることができ、樹脂組成物中のフレーク状ガラスの配合割合が均一になりやすいことを示す。結果を表3に示す。
樹脂成形品の強度特性を評価するために、引張強さを測定した。引張強さは、JIS K 7113に従って測定した。結果を表3に示す。
成形時の樹脂組成物の流動性の評価として、充填率を求めた。射出成形機の射出速度を下限にし、金型キャビティに樹脂を充填しにくくする条件で樹脂組成物の充填を行った。射出速度が低いと、熔融した樹脂組成物が金型の中で隅隅まで充填する前に冷却固化してしまうため、金型のキャビティに樹脂組成物が充填されにくくなる。充填率は、下記の式で計算した。充填率が高いほど流動性が高いことを示す。結果を表3に示す。なお、下記の式において、「成形品重量(通常)」とは射出成形機の射出速度が通常の場合の成形品重量のことであり、射出速度が通常とは金型キャビティに樹脂が100%充填されるように設定された射出速度のことである。すなわち、「成形品重量(通常)」とは、金型キャビティに樹脂が100%充填された場合の重量のことである。
充填率[%]={成形品重量(射出速度下限)/成形品重量(通常)}×100
Claims (10)
- フレーク状ガラス基材と、
前記フレーク状ガラス基材の表面の少なくとも一部を被覆する、結合剤からなる被覆膜と、
を含み、
前記結合剤が、滑剤(ただし、シリコーンを除く)を含む、又は、滑剤とアミノシランとを含み、
前記結合剤における前記滑剤の割合が30質量%以下である、
フレーク状ガラス。 - 前記結合剤が前記滑剤(ただし、シリコーンを除く)を含んでおり、
前記滑剤が、脂肪酸・ポリエチレンポリアミン縮合物、ポリエチレンイミンポリアミド及びパラフィンからなる群から選択される少なくともいずれか1種を含む、
請求項1に記載のフレーク状ガラス。 - 前記結合剤が前記滑剤とアミノシランとを含んでおり、
前記滑剤が、脂肪酸・ポリエチレンポリアミン縮合物、ポリエチレンイミンポリアミド、パラフィン及びシリコーンからなる群から選択される少なくともいずれか1種を含む、請求項1に記載のフレーク状ガラス。 - 前記結合剤における滑剤の割合が、1質量%以上30質量%以下である、
請求項1〜3のいずれか1項に記載のフレーク状ガラス。 - 前記フレーク状ガラス基材は、平均厚さが0.1〜7μm、平均粒径が10〜2000μmである、
請求項1〜4のいずれか1項に記載のフレーク状ガラス。 - 前記フレーク状ガラス基材は、平均厚さが0.1〜2μm、平均粒径が10〜2000μmである、
請求項5に記載のフレーク状ガラス。 - 請求項1〜6のいずれか1項に記載のフレーク状ガラスと、
マトリックス樹脂と、
を含む、樹脂組成物。 - 前記マトリックス樹脂がポリアミドを含む、
請求項7に記載の樹脂組成物。 - 前記ポリアミドがPA66及びPA9Tからなる群から選択される少なくともいずれか1種である、
請求項8に記載の樹脂組成物。 - 前記マトリックス樹脂が変性ポリフェニレンエーテルを含む、
請求項7に記載の樹脂組成物。
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