JPH0797239B2 - Electrophotographic toner - Google Patents
Electrophotographic tonerInfo
- Publication number
- JPH0797239B2 JPH0797239B2 JP63193420A JP19342088A JPH0797239B2 JP H0797239 B2 JPH0797239 B2 JP H0797239B2 JP 63193420 A JP63193420 A JP 63193420A JP 19342088 A JP19342088 A JP 19342088A JP H0797239 B2 JPH0797239 B2 JP H0797239B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- weight
- particles
- particle size
- average particle
- 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 - Lifetime
Links
- 239000002245 particle Substances 0.000 claims description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 30
- 239000000377 silicon dioxide Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000010419 fine particle Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000003086 colorant Substances 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims 1
- 239000000049 pigment Substances 0.000 description 6
- 229910002012 Aerosil® Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 3
- -1 ethylene, propylene, butylene, isoprene Chemical class 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920006037 cross link polymer Polymers 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229940099800 pigment red 48 Drugs 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- UZKWTJUDCOPSNM-UHFFFAOYSA-N 1-ethenoxybutane Chemical compound CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- WQMWHMMJVJNCAL-UHFFFAOYSA-N 2,4-dimethylpenta-1,4-dien-3-one Chemical compound CC(=C)C(=O)C(C)=C WQMWHMMJVJNCAL-UHFFFAOYSA-N 0.000 description 1
- SBYMUDUGTIKLCR-UHFFFAOYSA-N 2-chloroethenylbenzene Chemical compound ClC=CC1=CC=CC=C1 SBYMUDUGTIKLCR-UHFFFAOYSA-N 0.000 description 1
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- XZKRXPZXQLARHH-UHFFFAOYSA-N buta-1,3-dienylbenzene Chemical compound C=CC=CC1=CC=CC=C1 XZKRXPZXQLARHH-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical group CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PBZROIMXDZTJDF-UHFFFAOYSA-N hepta-1,6-dien-4-one Chemical compound C=CCC(=O)CC=C PBZROIMXDZTJDF-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 229940002712 malachite green oxalate Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 1
- 150000005673 monoalkenes Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- HILCQVNWWOARMT-UHFFFAOYSA-N non-1-en-3-one Chemical compound CCCCCCC(=O)C=C HILCQVNWWOARMT-UHFFFAOYSA-N 0.000 description 1
- 229940065472 octyl acrylate Drugs 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- UCUUFSAXZMGPGH-UHFFFAOYSA-N penta-1,4-dien-3-one Chemical compound C=CC(=O)C=C UCUUFSAXZMGPGH-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229940051201 quinoline yellow Drugs 0.000 description 1
- 235000012752 quinoline yellow Nutrition 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 239000004172 quinoline yellow Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- FUSUHKVFWTUUBE-UHFFFAOYSA-N vinyl methyl ketone Natural products CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XOSXWYQMOYSSKB-LDKJGXKFSA-L water blue Chemical compound CC1=CC(/C(\C(C=C2)=CC=C2NC(C=C2)=CC=C2S([O-])(=O)=O)=C(\C=C2)/C=C/C\2=N\C(C=C2)=CC=C2S([O-])(=O)=O)=CC(S(O)(=O)=O)=C1N.[Na+].[Na+] XOSXWYQMOYSSKB-LDKJGXKFSA-L 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09725—Silicon-oxides; Silicates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電気的な潜像を現像するための電子写真用ト
ナーに関する。Description: FIELD OF THE INVENTION The present invention relates to an electrophotographic toner for developing an electrical latent image.
従来の技術 従来、電子写真感光層の上に形成された静電潜像を顕像
化するのに用いられる電子写真用現像剤としては、ポリ
スチレン、スチレン−ブタジエン共重合体、ポリエステ
ル等の樹脂類にカーボンブラック、フタロシアニンブル
ー等の顔料又は染料を着色剤として使用し、溶融混練
後、粉砕して得られたトナーよりなる一成分現像剤、或
いは、キャリアとして平均粒径がトナーの粒径とほぼ同
じか、ないしは500μｍまでのガラスビーズ、鉄、ニッ
ケル、フェライト等の粒子、あるいはこれ等に種々の樹
脂を被覆したものに、トナーを混ぜ合わせた二成分現像
剤が一般に用いられている。2. Description of the Related Art Conventionally, as electrophotographic developers used to visualize an electrostatic latent image formed on an electrophotographic photosensitive layer, resins such as polystyrene, styrene-butadiene copolymer and polyester are used. A pigment or dye such as carbon black or phthalocyanine blue is used as a colorant, and the toner is a one-component developer obtained by pulverizing after melt-kneading, or as a carrier, the average particle diameter is almost the same as the toner particle diameter. A two-component developer in which toner is mixed with glass beads of the same size or up to 500 μm, particles of iron, nickel, ferrite or the like, or those coated with various resins is generally used.
しかしながら、これ等の現像剤だけでは、所望の帯電
量、帯電速度、電荷交換性、帯電の均一性、画質の環境
依存性及び現像剤の耐久性等が得られない。そのため、
しばしば、帯電コントローラーを添加剤として加える試
みが行われている。However, with these developers alone, desired charge amount, charge speed, charge exchange property, charge uniformity, environmental dependence of image quality, developer durability, etc. cannot be obtained. for that reason,
Attempts are often made to add charge controllers as additives.
発明が解決しようとする課題 例えば、負帯電性の場合、シリカが使用されているが、
現像性やトナーの電荷交換性が悪く、逆極性トナーが生
じ易く、カブリが発生しやすいという問題があった。ま
た、正帯電性トナーについて、シリカを用いることも知
られているが、その場合も逆極性トナーによるカブリが
生じやすい。一方、特開昭62-129866号公報には、シリ
カ微粒子と同時に粒径0.05μｍ以下のチタニア粒子を外
添剤として使用することが報告されているが、充分にカ
ブリを防止することができない。Problems to be Solved by the Invention For example, in the case of negative chargeability, silica is used,
There is a problem in that the developing property and the charge exchange property of the toner are poor, the reverse polarity toner is easily generated, and the fog is easily generated. It is also known that silica is used as the positively chargeable toner, but even in that case, fog easily occurs due to the opposite polarity toner. On the other hand, JP-A-62-129866 reports the use of titania particles having a particle size of 0.05 μm or less at the same time as silica fine particles as an external additive, but cannot sufficiently prevent fogging.
したがって、本発明の目的は、逆極性トナーによるカブ
リの発生しにくいトナーを提供することにある。Therefore, an object of the present invention is to provide a toner which is less likely to cause fog due to a reverse polarity toner.
問題点を解決するための手段 本発明は、少なくとも着色剤と結着樹脂とよりなる電子
写真用トナーにおいて、トナー粒子表面に、平均粒径0.
05μｍ以下のシリカ微粉末と平均粒径0.3〜1.0μｍのチ
タニア粒子とが付着してなり、かつ該シリカ微粉末を0.
2〜1.5重量％、該チタニア粒子を0.2〜2.0重量％含有し
てなることを特徴とする。Means for Solving the Problems The present invention is an electrophotographic toner comprising at least a colorant and a binder resin, on the toner particle surface, an average particle size of 0.
Silica fine powder having a particle size of 05 μm or less and titania particles having an average particle size of 0.3 to 1.0 μm adhere to each other, and the silica fine powder has a particle size of 0.
It is characterized by containing 2 to 1.5% by weight and 0.2 to 2.0% by weight of the titania particles.
本発明において用いるシリカ微粉末は、平均粒径0.1μ
ｍ以下のものであれば特に制限されるものではない。好
ましくは、ジメチルジクロロシラン等の公知の処理剤に
よる疎水化されたシリカ微粉末が使用される。具体的に
は、例えば、日本エアロジル社製R972、R812などが使用
できる。シリカ微粒子の使用量は、0.2〜1.5重量％の範
囲で設定される。The fine silica powder used in the present invention has an average particle size of 0.1 μm.
It is not particularly limited as long as it is m or less. Preferably, silica fine powder hydrophobized by a known treating agent such as dimethyldichlorosilane is used. Specifically, for example, R972 and R812 manufactured by Nippon Aerosil Co., Ltd. can be used. The amount of silica fine particles used is set in the range of 0.2 to 1.5% by weight.
一方、チタニア粒子は、平均粒径は0.3〜1.0μｍの範囲
のものが使用される。具体的には、例えばチタン工業社
製KA-10、KR-460等があげられる。チタニア粒子の使用
量は、0.2〜2.0重量％の範囲で設定される。On the other hand, titania particles having an average particle size in the range of 0.3 to 1.0 μm are used. Specific examples thereof include KA-10 and KR-460 manufactured by Titanium Industry Co., Ltd. The amount of titania particles used is set in the range of 0.2 to 2.0% by weight.
これ等シリカ微粒子及びチタニア粒子を表面に存在させ
るトナー粒子としては、特に制限されるものではなく、
公知の着色剤及び公知の結着樹脂よりなるものであれ
ば、どのようなものでも使用することができる。The toner particles having these silica fine particles and titania particles on the surface are not particularly limited,
Any material can be used as long as it is composed of a known colorant and a known binder resin.
トナー粒子に使用される結着樹脂としては、スチレン、
クロロスチレン、ビニルスチレン等のスチレン類、エチ
レン、プロピレン、ブチレン、イソプレン等のモノオレ
フィン、酢酸ビニル、プロピオン酸ビニル、安息香酸ビ
ニル、酢酸ビニル等のビニルエステル、アクリル酸メチ
ル、アクリル酸エチル、アクリル酸ブチル、アクリル酸
ドデシル、アクリル酸オクチル、アクリル酸フェニル、
メタクリル酸メチル、メタクリル酸エチル、メタクリル
酸ブチル、メタクリル酸ドデシル等のα−メチレン脂肪
族モノカルボン酸エステル、ビニルメチルエーテル、ビ
ニルエチルエーテル、ビニルブチルエーテル等のビニル
エーテル、ビニルメチルケトン、ビニルヘキシルケト
ン、ビニルイソプロペニルケトン等のビニルケトン等の
単独重合体あるいは共重合体を例示することができ、特
に代表的な結着樹脂としては、ポリスチレン、スチレン
−アクリル酸アルキル共重合体、スチレン−メタクリル
酸アルキル共重合体、スチレン−アクリロニトリル共重
合体、スチレン−ブタジエン共重合体、スチレン−無水
マレイン酸共重合体、ポリエチレン、ポリプロピレンを
あげることがでる。更に、ポリエステル、ポリウレタ
ン、エポキシ樹脂、シリコン樹脂、ポリアミド、変性ロ
ジン、パラフィン、ワックス類をあげることができる。The binder resin used for the toner particles is styrene,
Styrenes such as chlorostyrene and vinyl styrene, monoolefins such as ethylene, propylene, butylene, isoprene, vinyl acetate, vinyl propionate, vinyl benzoate, vinyl esters such as vinyl acetate, methyl acrylate, ethyl acrylate, acrylic acid Butyl, dodecyl acrylate, octyl acrylate, phenyl acrylate,
Α-Methylene aliphatic monocarboxylic acid esters such as methyl methacrylate, ethyl methacrylate, butyl methacrylate and dodecyl methacrylate, vinyl ethers such as vinyl methyl ether, vinyl ethyl ether and vinyl butyl ether, vinyl methyl ketone, vinyl hexyl ketone, vinyl Homopolymers or copolymers of vinyl ketone and the like such as isopropenyl ketone can be exemplified, and particularly representative binder resins include polystyrene, styrene-alkyl acrylate copolymer, and styrene-alkyl methacrylate copolymer. Examples thereof include polymer, styrene-acrylonitrile copolymer, styrene-butadiene copolymer, styrene-maleic anhydride copolymer, polyethylene and polypropylene. Further, polyester, polyurethane, epoxy resin, silicone resin, polyamide, modified rosin, paraffin and waxes can be mentioned.
又、トナーの着色剤としては、カーボンブラック、ニグ
ロシン染料、アニリンブルー、カルコイルブルー、クロ
ムイエロー、ウルトラマリンブルー、デュポンオイルレ
ッド、キノリンイエロー、メチレンブルークロリド、フ
タロシアニンブルー、マラカイトグリーンオキサレー
ト、ランプブラック、ローズベンガル、C.I.ピグメント
・レッド48:1、C.I.ピグメント・レッド122、C.I.ピグ
メント・レッド57:1、C.I.ピグメント・イエロー97、ピ
グメント・イエロー12、ピグメント・イエロー15:1、C.
I.ピグメント・ブルー15:3、等を代表的なものとして例
示することができる。Further, as the colorant of the toner, carbon black, nigrosine dye, aniline blue, calcoil blue, chrome yellow, ultramarine blue, DuPont oil red, quinoline yellow, methylene blue chloride, phthalocyanine blue, malachite green oxalate, lamp black, Rose Bengal, CI Pigment Red 48: 1, CI Pigment Red 122, CI Pigment Red 57: 1, CI Pigment Yellow 97, Pigment Yellow 12, Pigment Yellow 15: 1, C.
I. Pigment Blue 15: 3, etc. can be illustrated as typical ones.
これ等トナー粒子には、所望により公知の帯電制御剤、
定着助剤等の添加剤を同時に含有させてもよい。If desired, a known charge control agent may be added to these toner particles,
Additives such as fixing aids may be contained at the same time.
本発明において、トナー粒子は、約30μｍより小さく、
好ましくは３〜20μｍの平均粒径を有するものを用いる
ことができる。In the present invention, the toner particles are smaller than about 30 μm,
Preferably, those having an average particle size of 3 to 20 μm can be used.
本発明の電子写真用トナーは、キャリアを用いない一成
分トナー現像剤であってもよく、また、キャリアを用い
る二成分現像剤であってもよい。しかしながら、二成分
現像剤として用いられるのが好ましい。The toner for electrophotography of the present invention may be a one-component toner developer which does not use a carrier or a two-component developer which uses a carrier. However, it is preferably used as a two-component developer.
キャリアを使用する場合には、公知のキャリアであれば
特に制限されるものではなく、鉄粉系キャリア、フェラ
イト系キャリア、表面コートフェライトキャリア、磁性
粉末分散型キャリア等が使用できる。When a carrier is used, it is not particularly limited as long as it is a known carrier, and an iron powder type carrier, a ferrite type carrier, a surface-coated ferrite carrier, a magnetic powder dispersion type carrier and the like can be used.
本発明の電子写真用トナーにおいて、上記シリカ微粒子
及びチタニア粒子をトナー粒子表面に付着させるには、
公知の手段によって行うことができる。例えば、混合の
ために使用する混合機としてヘンシェルミキサーやＶ型
ブレンダー等をあげることができる。In the electrophotographic toner of the present invention, in order to adhere the silica fine particles and the titania particles to the toner particle surface,
It can be performed by a known means. For example, a Henschel mixer, a V-type blender, or the like can be used as a mixer used for mixing.
実施例 以下、本発明を実施例により具体的に説明する。EXAMPLES Hereinafter, the present invention will be specifically described with reference to Examples.
実施例１ スチレン−ｎ−ブチルメタ 90重量％ クリレート架橋重合体 カーボンブラック 10重量％ 上記成分を溶融混練後、微粉砕し、分級して平均粒径11
μｍのトナー粒子を作製した後、粒径0.016μｍのシリ
カ微粉末（R972、日本エアロジル社製）0.8重量％、及
び平均粒径0.4μｍのチタニア粒子（KA-10、チタン工業
社製）1.0重量％を添加し、ヘンシェルミキサーによっ
て混合して、トナー粒子表面に付着させてトナーを作製
した。Example 1 Styrene-n-butylmeth 90% by weight Crylate cross-linked polymer Carbon black 10% by weight The above components were melt-kneaded, then finely pulverized and classified to obtain an average particle size of 11
After producing toner particles of μm, 0.8% by weight of silica fine powder (R972, manufactured by Nippon Aerosil Co., Ltd.) having a particle size of 0.016 μm, and 1.0% by weight of titania particles (KA-10, manufactured by Titanium Industry Co., Ltd.) having an average particle size of 0.4 μm. % Was added and mixed by a Henschel mixer to adhere to the surface of the toner particles to prepare a toner.
次に、スチレン−ｎ−ブチルメタクリレート共重合体30
重量％及びマグネタイト（EPT1000、戸田工業社製）70
重量％を混練し、粉砕し、分級して、平均粒径35μｍの
キャリアを得た。Next, styrene-n-butyl methacrylate copolymer 30
Weight% and magnetite (EPT1000, manufactured by Toda Kogyo Co., Ltd.) 70
% By weight was kneaded, pulverized and classified to obtain a carrier having an average particle size of 35 μm.
上記のトナー７重量％とキャリア93重量％とを混合し
て、電子写真現像剤を作製し、電子写真複写機（FX-779
0改造機、富士ゼロックス（株）製）によってコピーテ
ストを行ったところ、50万枚目まで、逆極性トナーによ
るカブリは発生しなかった。An electrophotographic developer was prepared by mixing 7% by weight of the above toner and 93% by weight of a carrier, and an electrophotographic copying machine (FX-779
When a copy test was carried out using a 0 remodeling machine, Fuji Xerox Co., Ltd., fogging due to reverse polarity toner did not occur up to the 500,000th sheet.
比較例１ チタニア粒子を使用しなかった以外は、実施例１とまっ
たく同様にしてトナー及びキャリアを作製した。同様に
してコピーテストを行ったところ、20万枚目より逆極性
トナーによるカブリが発生した。Comparative Example 1 A toner and a carrier were produced in exactly the same manner as in Example 1 except that the titania particles were not used. When a copy test was conducted in the same manner, fog was generated from the reverse polarity toner from the 200,000th sheet.
比較例２ 実施例１におけるチタニア粒子の代わりに、平均粒径0.
021μｍのチタニア（P25日本アエロジル社製）1.0重量
％を使用した以外は、実施例１とおける同様にしてトナ
ー及びキャリアを作製した。同様にしてコピーテストを
行ったところ、30万枚目より逆極性トナーによるカブリ
が発生した。Comparative Example 2 Instead of the titania particles in Example 1, an average particle size of 0.
A toner and a carrier were prepared in the same manner as in Example 1 except that 1.02% by weight of 021 μm titania (manufactured by Nippon Aerosil Co., Ltd., P25) was used. When a copy test was conducted in the same manner, fog was generated from the reverse polarity toner from the 300,000th sheet.
実施例２ スチレン−ｎ−ブチルメタ 90重量％ クリレート架橋重合体 銅フタロシアニン ９重量％ 帯電制御剤（ボントロン Ｐ−51、オリエント社製） １重量％ 上記成分を溶融混練後、微粉砕し、分級して平均粒径11
μｍのトナー粒子を作製した。次に、粒径0.007μｍの
シリカ微粉末（R812、日本エアロジル社製）0.3重量
％、及び平均粒径0.3μｍのチタニア粒子（KR-460、チ
タン工業社製）1.0重量％を添加し、ヘンシェルミキサ
ーによって混合して、トナー粒子表面に付着させてトナ
ーを作製した。Example 2 Styrene-n-butylmeth 90% by weight Crylate cross-linked polymer Copper phthalocyanine 9% by weight Charge control agent (Bontron P-51, manufactured by Orient) 1% by weight After melt-kneading the above components, finely pulverized and classified Average particle size 11
μm toner particles were prepared. Next, 0.3% by weight of fine silica powder (R812, manufactured by Nippon Aerosil Co., Ltd.) having a particle size of 0.007 μm and 1.0% by weight of titania particles (KR-460, manufactured by Titanium Industry Co., Ltd.) having an average particle size of 0.3 μm were added, and Henschel was added. A toner was prepared by mixing with a mixer and adhering to the surface of the toner particles.
上記のトナー７重量％及び実施例１におけると同様にし
て製造したキャリア93重量％を混合して現像剤を作製し
た。電子写真複写機（FX-7790改造機、富士ゼロックス
（株）製）によってコピーテストを行ったところ、50万
枚目まで、逆極性トナーによるカブリは発生しなかっ
た。7% by weight of the above toner and 93% by weight of the carrier produced in the same manner as in Example 1 were mixed to prepare a developer. When a copy test was performed using an electrophotographic copying machine (FX-7790 modified machine, Fuji Xerox Co., Ltd.), fogging due to reverse polarity toner did not occur up to the 500,000th sheet.
実施例３ 実施例２において銅フタロシアニン９重量％の代わりに
C.I.ピグメントレッド48:1 9重量％を使用した以外は、
実施例２におけると同様にしてトナーを作製し、同様に
してコピーテストを行った。その結果、50万枚目まで、
逆極性トナーによるカブリは発生しなかった。Example 3 Instead of 9% by weight of copper phthalocyanine in Example 2,
CI Pigment Red 48: 1 except using 9% by weight,
A toner was prepared in the same manner as in Example 2, and a copy test was conducted in the same manner. As a result, up to the 500,000th sheet,
Fogging due to the opposite polarity toner did not occur.
発明の効果 本発明の電子写真用トナーは、上記の様にトナー粒子表
面に、平均粒径0.1μｍ以下のシリカ微粉末と平均粒径
0.3〜1.0μｍのチタニア粒子とが付着しているから、長
期間繰り返し使用しても、逆極性トナーの発生が少な
く、したがってカブリのない安定した画質のコピー画像
を得ることができる。EFFECTS OF THE INVENTION The electrophotographic toner of the present invention has the above-mentioned toner fine particles having a silica fine powder having an average particle size of 0.1 μm or less and an average particle size on the surface thereof.
Since the titania particles having a size of 0.3 to 1.0 μm are attached, even when repeatedly used for a long period of time, the generation of reverse polarity toner is small, and thus a copy image with stable image quality without fog can be obtained.
Claims (2)
子写真用トナーにおいて、トナー粒子表面に、平均粒径
0.05μｍ以下のシリカ微粉末と平均粒径0.3〜1.0μｍの
チタニア粒子とが付着してなり、かつ該シリカ微粉末を
0.2〜1.5重量％、該チタニア粒子を0.2〜2.0重量％含有
してなることを特徴とする電子写真用トナー。1. An electrophotographic toner comprising at least a colorant and a binder resin, wherein the surface of the toner particles has an average particle size.
Silica fine powder of 0.05 μm or less and titania particles having an average particle size of 0.3 to 1.0 μm adhere to each other, and the silica fine powder is
An electrophotographic toner comprising 0.2 to 1.5% by weight and 0.2 to 2.0% by weight of the titania particles.
を特徴とする請求項１記載の電子写真用トナー。2. The toner for electrophotography according to claim 1, wherein the silica fine particles are made of hydrophobic silica.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63193420A JPH0797239B2 (en) | 1988-08-04 | 1988-08-04 | Electrophotographic toner |
| GB8917594A GB2222269A (en) | 1988-08-04 | 1989-08-01 | Electrophotographic toner |
| FR8910567A FR2635596A1 (en) | 1988-08-04 | 1989-08-04 | ELECTROPHOTOGRAPHIC TONER |
| DE19893925928 DE3925928A1 (en) | 1988-08-04 | 1989-08-04 | ELECTROPHOTOGRAPHIC TONER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63193420A JPH0797239B2 (en) | 1988-08-04 | 1988-08-04 | Electrophotographic toner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0243564A JPH0243564A (en) | 1990-02-14 |
| JPH0797239B2 true JPH0797239B2 (en) | 1995-10-18 |
Family
ID=16307671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63193420A Expired - Lifetime JPH0797239B2 (en) | 1988-08-04 | 1988-08-04 | Electrophotographic toner |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0797239B2 (en) |
| DE (1) | DE3925928A1 (en) |
| FR (1) | FR2635596A1 (en) |
| GB (1) | GB2222269A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4041358A1 (en) * | 1990-12-20 | 1992-07-02 | Mittelstaedt Mathis Christian | Prodn. of decoration on inorganic, non-metallic material - by applying coloured substance, transferring to surface of material and annealing |
| USH1577H (en) * | 1995-05-26 | 1996-08-06 | Hanzlik; Cheryl A. | Toner and developer compositions with high surface additive loadings |
| JP2002108002A (en) * | 2000-09-29 | 2002-04-10 | Brother Ind Ltd | Toner composition |
| JP6497360B2 (en) * | 2016-06-29 | 2019-04-10 | 京セラドキュメントソリューションズ株式会社 | Method for producing toner for developing electrostatic latent image |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US465209A (en) * | 1891-12-15 | sandt | ||
| JPS60136755A (en) * | 1983-12-26 | 1985-07-20 | Minolta Camera Co Ltd | Dry type developer for electrostatic latent image developing |
| US4652509A (en) * | 1984-05-11 | 1987-03-24 | Konishiroku Photo Industry Co., Ltd. | Toner for developing electrostatic latent image |
| JPH0740140B2 (en) * | 1985-04-30 | 1995-05-01 | 富士ゼロックス株式会社 | Developer |
| JPS62129866A (en) * | 1985-12-02 | 1987-06-12 | Konishiroku Photo Ind Co Ltd | Positively electrifiable developer for developing electrostatic image |
| JPS62174772A (en) * | 1986-01-29 | 1987-07-31 | Konishiroku Photo Ind Co Ltd | Toner for developing electrostatic image |
| JP2684033B2 (en) * | 1986-03-11 | 1997-12-03 | コニカ株式会社 | Toner for developing electrostatic image and image forming method |
| JP2748366B2 (en) * | 1987-08-10 | 1998-05-06 | 富士ゼロックス株式会社 | Electrophotographic developer |
-
1988
- 1988-08-04 JP JP63193420A patent/JPH0797239B2/en not_active Expired - Lifetime
-
1989
- 1989-08-01 GB GB8917594A patent/GB2222269A/en not_active Withdrawn
- 1989-08-04 DE DE19893925928 patent/DE3925928A1/en not_active Withdrawn
- 1989-08-04 FR FR8910567A patent/FR2635596A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB8917594D0 (en) | 1989-09-13 |
| JPH0243564A (en) | 1990-02-14 |
| GB2222269A (en) | 1990-02-28 |
| FR2635596A1 (en) | 1990-02-23 |
| DE3925928A1 (en) | 1990-02-08 |
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