JP7580922B2 - 粉体コーティング塗布のための雲母顔料粒子 - Google Patents
粉体コーティング塗布のための雲母顔料粒子 Download PDFInfo
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- JP7580922B2 JP7580922B2 JP2020017524A JP2020017524A JP7580922B2 JP 7580922 B2 JP7580922 B2 JP 7580922B2 JP 2020017524 A JP2020017524 A JP 2020017524A JP 2020017524 A JP2020017524 A JP 2020017524A JP 7580922 B2 JP7580922 B2 JP 7580922B2
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
- C09D5/036—Stabilisers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/007—Processes for applying liquids or other fluent materials using an electrostatic field
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0081—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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Description
本明細書で使用される場合、以下の用語及びその変形は、このような用語が使用される文脈によって、異なる意味が明確に意図されない限り、以下に与えられる意味を有する。
Xは、K、Na、Ca、H3O,NH4、又はあまり一般的ではないが、Ba、Rb、又はCsであり、
Yは、Al、Mg、又はFe、又はあまり一般的ではないが、Mn、Cr、Ti、Li、V、又はZnであり、
Zは、一般に、Si又はAlであるが、Fe3+又はTiも含み得る。
本粉体コーティングは、ポリマーマトリックス上及びポリマーマトリックス内に組み込まれた雲母フレークを有するポリマー材料からなる雲母含有顔料粒子から形成される。これらの粒子は、約0.93~約0.999、約0.95~約0.995、又は約0.96~約0.990の円形度、及び約1.3~約2.0の幾何学的径分布を有する。これらの粒子の平均粒子径は、約50マイクロメートル~約250マイクロメートル、約100マイクロメートル~約200マイクロメートル、又は約125マイクロメートル~約175マイクロメートルである。
本雲母含有顔料組成物を調製するためのプロセスは、図1に概ね記載されている。このプロセスは、ポリエステル樹脂及びポリマー安定剤を、雲母フレークと一緒に水混和性有機溶媒中に溶解し、次いで、極性溶媒を貧溶媒として添加して、雲母の粒子を沈殿させることによる、第1の溶液の作成を含む。
本雲母含有顔料組成物の光学特性は、主に天然又は人工的に合成された雲母のフレークによって提供される。雲母フレークは、真珠光沢顔料の特徴的な光沢を付与する雲母材料を提供するために、クロム、コバルト、鉄、チタン、及び同様の金属を含む遷移金属の酸化物などの高反射値を有する透明金属酸化物で、例えば、TiO2、Fe2O3、Cr2O3などの高い反射値を有する金属酸化物で処理することができる。金属酸化物コーティングを有する雲母フレークの色は、異なる厚さの金属酸化物材料を雲母フレークに塗布することによって調整することができる。例えば、約40nm~約60nmの厚さを有する金属酸化物層を有する雲母粒子は、銀着色光を反射し、約60nm~約80nmの層は、一般に、黄色/金色を反射し、約80nm~約100nmの層は、一般に、赤色を反射し、約100nm~約140nmの層は、一般に、青色を反射し、約120nm~約160nmの層は、一般に、緑色を反射する。実施形態では、粉体コーティングは、金属(金又は銀)又は真珠光沢色などの装飾的な色を表す。
雲母含有顔料組成物を生成するための本プロセスで使用されるポリエステルは、分枝状又は直鎖状非晶質ポリエステル樹脂である。非晶性ポリエステル樹脂は、ジオールと二塩基酸とを任意の触媒の存在下で反応させることによって形成され得る。非晶質ポリエステルの調製に利用されるビニル二酸又はビニルジエステルを含む二酸又はジエステルの例としては、ジカルボン酸又はジエステル、例えば、テレフタル酸、フタル酸、イソフタル酸、フマル酸、ジメチルフマレート、ジメチルイタコネート、cis-1,4-ジアセトキシ-2-ブテン、ジエチルフマレート、ジエチルマレエート、マレイン酸、コハク酸、イタコン酸、コハク酸、無水コハク酸、ドデシルコハク酸、無水ドデシルコハク酸、グルタル酸、無水グルタル酸、アジピン酸、ピメリン酸、スベリン酸、アゼライン酸、ドデカン二酸、ジメチルテレフタレート、ジエチルテレフタレート、ジメチルイソフタレート、ジエチルイソフタレート、ジメチルフタレート、無水フタル酸、ジエチルフタレート、ジメチルサクシネート、ジメチルフマレート、ジメチルマレエート、ジメチルグルタレート、ジメチルアジペート、ジメチルドデシルサクシネート、及びこれらの組み合わせが挙げられる。二塩基酸又はジエステルは、例えば、樹脂の約40~約60モル%、樹脂の約42~約52モル%、樹脂の約45~約50モル%の量で存在し得る。
雲母含有顔料を生成するための本プロセスはまた、ポリマー安定剤として水溶性ポリマーを使用する。非限定的な例示的なポリマー安定剤としては、ポリ(ビニルアセテート)、ポリ(メチルメタクリレート)、ポリ(アクリロニトリル)、ポリ(ジメチルシロキサン)、ポリ(ビニルクロライド)、ポリ(エチレン)、ポリ(プロピレン)、ポリ(ラウリルメタクリレート)、ポリ(オキシエチレン)、ポリ(アクリルアミド)、ポリ(ビニルアルコール)、ポリ(アクリル酸)、ポリ(メタクリル酸)、ポリ(ビニルピロリドン)、ポリ(エチレンイミン)、ポリ(ビニルメチルエーテル)、ポリ(4-ビニルピリジン)、ポリ(12-ヒドロキシステアリン酸)、ポリ(イソブチレン)、シス-1:4-ポリ(イソプレン)、カルボキシメチルセルロース、ゼラチン、ポリソルベート80(Millipore Sigma/Merck KGaA,Darmstadt,Germanyから入手可能であるTWEEN80など)、ポリソルベート20(Millipore Sigma/Merck KGaA,Darmstadt,Germanyから入手可能であるTWEEN20など)、ヒドロキシプロピルメチルセルロース、コポビドン及びポリビニルピロリドン、ポリエチレングリコール(PEG)、ポリメタクリレート、ヒプロメロースアセテートサクシネート、ヒプロメロースフタレート、SOLUPLUS(BASF,Ludwigshafen,Germanyから入手可能である)などのポリビニルカプロラクタム-ポリビニルアセテート-ポリエチレングリコールグラフトコポリマー、ポリビニルアセテートフタレート、セルロースアセテートフタレート、及びこれらの組み合わせが挙げられる。
本プロセスで使用する水混和性有機溶媒は、当該技術分野において既知の溶媒から選択され得る。このような有機溶媒は、本プロセスの条件下で、既定の時間、液相を(例えば、極性相及び非極性相へ)分離することなく、水と均質な混合物を形成し得る。例えば、溶媒は、アルコール、ジメチルアセトアミド、酢酸、ジエチレングリコールジメチルエーテル、ジメチルホルムアミド、1,4-ジオキサン、エチレングリコール、ヘキサメチルホスホルアミド、ヘキサメチルリントリアミド、ピリジン、水、及びこれらの組み合わせからなる群から選択され得る。
溶液から雲母顔料の沈殿を誘導するために、本プロセスで、貧溶媒として極性溶媒も使用される。脱イオン水は、例えば、任意にポリビニルアルコールなどの他の添加剤と共に使用され得る。このような添加剤は、添加剤の沈殿、又は液体混合物の粘度の望ましくない増大を回避するために選択されるべきである。例えば、約10,000~約100,000の分子量を有するポリビニルアルコールは、典型的には、約0.01重量%~約3重量%、又は約0.05重量%~約2重量%の量で添加剤として使用され得る。他の水溶液又は極性溶媒も使用され得る。
図1に一般に示されるように、雲母粒子をポリエステル及びポリマー安定剤と組み合わせて、粉体コーティング塗布で使用するための雲母顔料を調製するための本プロセスにおいて第1の流体混合物を形成する。好ましくは、ポリエステルは、固体形態で添加され、例えば、粉体状又はペレット化され、雲母顔料粒子と組み合わせて、粉体又は遊離した粒子状混合物を形成する。あるいは、ポリエステル粒子は、まず、雲母顔料粒子と組み合わされる前に溶媒に溶解され得る。これらの成分は、例えば、水混和性有機溶媒とそれらを接触させる前に、水混和性有機溶媒の添加と同時に、様々な方法で組み合わせることができ、あるいは、雲母構成成分は、水混和性有機溶媒中で事前にスラリー化することができ、次いでポリエステル及びポリマー安定剤成分に添加することができる。流体混合物は、混合物中に雲母粒子が存在するため、液体懸濁液である。
本雲母顔料は、一般に、ポリマー粒子の表面内及び表面上に組み込まれた雲母のフレークを含む。図6に最もよく見られるように、金属酸化物でコーティングされた雲母の平坦な層状層は、概ね球状のポリマー材料の表面に付着する。粒子は、溶液中のポリマー材料の沈殿によって形成され、沈殿物が形成されると、雲母は沈殿粒子内に組み込まれ、並びにそのような粒子の表面に付着する。
本雲母含有顔料組成物は、装飾コーティングとして、電化製品、自動車部品、消費者向け電子製品、家具、自転車、及び重機などの様々な物品及び表面に塗布することができる。上に議論されるように、雲母粒子は、様々な色及び反射率レベルを有することができ、したがって、本雲母顔料は、本雲母顔料が塗布される基材にそのような品質を付与する。塗布されたコーティングは、その光学特性(干渉色)による装飾的外観を提供し、並びにテクスチャ加工された外観を提供する。
ブラックダイアモンド顔料から金色の雲母材料を得た。以下のプロセスで使用される雲母は、主にTiO2で作製され、一方、コア雲母自体は、主にシリカ及びマグネシウム、並びにSiO2であった。元素組成は以下のとおりであった。
実施例1で生成した雲母含有顔料組成物の特性を、以下の表1に列挙する。
Claims (19)
- 球状顔料粒子を含む雲母含有顔料組成物を生成するための方法であって、
非晶質ポリエステル樹脂、水溶性ポリマーを含むポリマー安定剤、及び雲母粒子を提供する工程と、
前記ポリエステル樹脂及びポリマー安定剤を、前記雲母粒子と一緒に水混和性有機溶媒中に溶解して、前記雲母粒子を含む第1の流体混合物を形成する工程と、
極性溶媒を、既定の速度で前記第1の流体混合物に添加し、それによって、沈殿顔料粒子を含む第2の流体混合物を形成する工程と、
前記沈殿顔料粒子を捕集する工程と、を含み、
前記ポリマー安定剤が、ポリビニルアセテート、ポリ(メチルメタクリレート)、ポリ(アクリロニトリル)、ポリ(ジメチルシロキサン)、ポリビニルクロライド、ポリエチレン、ポリプロピレン、ポリ(ラウリルメタクリレート)、ポリ(オキシエチレン)、ポリ(アクリルアミド)、ポリ(ビニルアルコール)、ポリ(アクリル酸)、ポリ(メタクリル酸)、ポリビニルピロリドン、ポリエチレンイミン、ポリ(ビニルメチルエーテル)、ポリ(4-ビニルピリジン)、ポリ(12-ヒドロキシステアリン酸)、ポリ(イソブチレン)、シス-1:4-ポリ(イソプレン)、カルボキシメチルセルロース、ゼラチン、ポリソルベート80、ポリソルベート20、ヒドロキシプロピルメチルセルロース、コポビドン及びポリビニルピロリドン、ポリエチレングリコール(PEG)、ポリメタクリレート、ヒプロメロースアセテートサクシネート、ヒプロメロースフタレート、ポリビニルカプロラクタム- ポリビニルアセテート- ポリエチレングリコールグラフトコポリマー、ポリビニルアセテートフタレート、セルロースアセテートフタレート、及びこれらの組み合わせからなる群から選択される、方法。 - シリカを、前記第2の流体混合物に添加する工程を更に含む、請求項1に記載の方法。
- 前記極性溶媒溶液の前記第1の流体混合物への前記添加の前に、シリカを前記第1の流体混合物に添加する工程を更に含む、請求項1に記載の方法。
- 前記ポリエステル樹脂、前記ポリマー安定剤、及び前記雲母粒子が、前記水混和性有機溶媒と接触するように配置される前に一緒に添加される、請求項1に記載の方法。
- 前記雲母粒子が、前記ポリエステル樹脂及びポリマー安定剤が前記水混和性有機溶媒と接触するように配置される前に、前記水混和性有機溶媒に添加される、請求項1に記載の方法。
- 前記水混和性有機溶媒が、ジメチルアセトアミド、酢酸、ジエチレングリコールジメチルエーテル、ジメチルホルムアミド、1,4-ジオキサン、エチレングリコール、ヘキサメチルホスホルアミド、ヘキサメチルリントリアミド、ピリジン、及びこれらの組み合わせからなる群から選択される、請求項1に記載の方法。
- 前記ポリエステル樹脂が、ポリ(プロポキシル化ビスフェノールコフマレート)、ポリ(エトキシル化ビスフェノールコフマレート)、ポリ(ブチルオキシル化ビスフェノールコフマレート)、ポリ(コプロポキシル化ビスフェノールコエトキシル化ビスフェノールコフマレート)、ポリ(1,2-プロピレンフマレート)、ポリ(プロポキシル化ビスフェノールコマレエート)、ポリ(エトキシル化ビスフェノールコマレエート)、ポリ(ブチルオキシル化ビスフェノールコマレエート)、ポリ(コプロポキシル化ビスフェノールコエトキシル化ビスフェノールコマレエート)、ポリ(1,2-プロピレンマレエート)、ポリ(プロポキシル化ビスフェノールコイタコネート)、ポリ(エトキシル化ビスフェノールコイタコネート)、ポリ(ブチルオキシル化ビスフェノールコイタコネート)、ポリ(コプロポキシル化ビスフェノールコエトキシル化ビスフェノールコイタコネート)、ポリ(1,2-プロピレンイタコネート)、及びこれらの組み合わせからなる群から選択される、請求項1に記載の方法。
- 前記ポリエステル樹脂が、約45℃~約75℃のガラス転移温度を有し、「約」は参照量の10%以内の量を指す、請求項1に記載の方法。
- 前記雲母が、約5マイクロメートル~約200マイクロメートルの粒子径を有し、「約」は参照量の10%以内の量を指す、請求項1に記載の方法。
- 前記第2の混合物が、約75℃~約95℃の温度に加熱され、「約」は参照量の10%以内の量を指す、請求項1に記載の方法。
- 前記顔料粒子は、雲母フレークが中及び上に組み込まれたポリマー材料を含み、前記組成物の前記顔料粒子が、約0.93~約0.999の円形度、及び約1.3~約2.0の幾何学的径分布を有する、請求項1に記載の方法。
- 前記顔料粒子が、約0.95~約0.995の円形度を有し、「約」は参照量の10%以内の量を指す、請求項11に記載の方法。
- 前記顔料粒子の平均粒子径が、約50マイクロメートル~約250マイクロメートルであり、「約」は参照量の10%以内の量を指す、請求項11に記載の方法。
- 前記雲母が、前記顔料粒子の約2重量%~約60重量%の量で前記粒子中に存在し、「約」は参照量の10%以内の量を指す、請求項11に記載の方法。
- 前記雲母の平均粒子径が、約5マイクロメートル~約150マイクロメートルであり、「約」は参照量の10%以内の量を指す、請求項11に記載の方法。
- 前記組成物が、金属色を有する、請求項11に記載の方法。
- 前記組成物が、約10GU~約70GUの範囲の光沢を有し、「約」は参照量の10%以内の量を指す、請求項11に記載の方法。
- 基材上に着色コーティングを形成する方法であって、
請求項11に記載の方法により生成する雲母含有顔料組成物を、静電粉体コーティングアプリケータを用いて、前記基材に塗布することと、
前記顔料組成物を前記基材上で硬化させることと、を含む、方法。 - 前記コーティングが、トライボ又はコロナ帯電を介して、前記基材に静電転写される、
請求項18に記載の方法。
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| US16/292,257 | 2019-03-04 |
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| JP2004252147A (ja) | 2003-02-20 | 2004-09-09 | Ricoh Co Ltd | 静電荷像現像用トナー用無機微粒子、静電荷像現像用トナー、現像剤、画像形成装置および画像形成方法 |
| JP2004309517A (ja) | 2003-04-01 | 2004-11-04 | Kao Corp | トナーの製造方法 |
| JP2013072943A (ja) | 2011-09-27 | 2013-04-22 | Fuji Xerox Co Ltd | 静電荷像現像用トナー、静電荷像現像剤、カートリッジ、画像形成方法及び画像形成装置 |
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| US5055500A (en) * | 1989-10-24 | 1991-10-08 | Eastman Kodak Company | Process for treating pigments |
| CA2042155A1 (en) * | 1990-05-29 | 1991-11-30 | Clint W. Carpenter | Surface-modified micaceous particulates having improved dispersibility in aqueous media |
| DE4120921A1 (de) * | 1991-06-25 | 1993-01-07 | Merck Patent Gmbh | Oberflaechenmodifizierte plaettchenfoermige substrate mit verbessertem absetz- und aufruehrverhalten |
| US5234496A (en) * | 1991-07-30 | 1993-08-10 | E. I. Du Pont De Nemours And Company | Mica based pigments coated with alkylene glycol alkyl ether |
| US7312257B2 (en) * | 2003-01-23 | 2007-12-25 | General Electric Company | Polymer encapsulation of high aspect ratio materials and methods of making same |
| JP4986385B2 (ja) * | 2004-08-11 | 2012-07-25 | 日揮触媒化成株式会社 | 鱗片状複合粒子およびこれを配合した化粧料 |
| US8039183B2 (en) * | 2007-10-25 | 2011-10-18 | Xerox Corporation | Resin-coated pearlescent or metallic pigment for special effect images |
| US8338069B2 (en) * | 2010-07-19 | 2012-12-25 | Xerox Corporation | Toner compositions |
| US10705442B2 (en) * | 2016-08-03 | 2020-07-07 | Xerox Corporation | Toner compositions with white colorants and processes of making thereof |
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| JP2004309517A (ja) | 2003-04-01 | 2004-11-04 | Kao Corp | トナーの製造方法 |
| JP2013072943A (ja) | 2011-09-27 | 2013-04-22 | Fuji Xerox Co Ltd | 静電荷像現像用トナー、静電荷像現像剤、カートリッジ、画像形成方法及び画像形成装置 |
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