JPH04142560A - Electrophotographic toner - Google Patents
Electrophotographic tonerInfo
- Publication number
- JPH04142560A JPH04142560A JP2265170A JP26517090A JPH04142560A JP H04142560 A JPH04142560 A JP H04142560A JP 2265170 A JP2265170 A JP 2265170A JP 26517090 A JP26517090 A JP 26517090A JP H04142560 A JPH04142560 A JP H04142560A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- fine powder
- magnesium oxide
- single crystal
- toner particles
- 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.)
- Pending
Links
- 239000002245 particle Substances 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 18
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 18
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 239000003086 colorant Substances 0.000 claims abstract description 6
- 239000011164 primary particle Substances 0.000 claims abstract description 5
- 230000007547 defect Effects 0.000 abstract description 6
- -1 Polyethylene Polymers 0.000 abstract description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 4
- 239000006229 carbon black Substances 0.000 abstract description 3
- 239000006247 magnetic powder Substances 0.000 abstract description 3
- 239000004698 Polyethylene Substances 0.000 abstract description 2
- 229920000800 acrylic rubber Polymers 0.000 abstract description 2
- 229920000573 polyethylene Polymers 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000000049 pigment Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000000052 comparative effect Effects 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
- 239000000975 dye Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- UZKWTJUDCOPSNM-UHFFFAOYSA-N 1-ethenoxybutane Chemical compound CCCCOC=C UZKWTJUDCOPSNM-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
- XVTXLKJBAYGTJS-UHFFFAOYSA-N 2-methylpenta-1,4-dien-3-one Chemical compound CC(=C)C(=O)C=C XVTXLKJBAYGTJS-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical group N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-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
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-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
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical group O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene 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
- 241000907663 Siproeta stelenes Species 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 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
- XZKRXPZXQLARHH-UHFFFAOYSA-N buta-1,3-dienylbenzene Chemical compound C=CC=CC1=CC=CC=C1 XZKRXPZXQLARHH-UHFFFAOYSA-N 0.000 description 1
- DFYKHEXCUQCPEB-UHFFFAOYSA-N butyl 2-methylprop-2-enoate;styrene Chemical compound C=CC1=CC=CC=C1.CCCCOC(=O)C(C)=C DFYKHEXCUQCPEB-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 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
- 239000003822 epoxy resin Substances 0.000 description 1
- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical compound CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 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
- 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
- 239000004615 ingredient Substances 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
- 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
- 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
- 239000000203 mixture Substances 0.000 description 1
- 150000005673 monoalkenes Chemical class 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
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- UCUUFSAXZMGPGH-UHFFFAOYSA-N penta-1,4-dien-3-one Chemical class 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
- 108091008695 photoreceptors Proteins 0.000 description 1
- 229940099800 pigment red 48 Drugs 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
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 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
- 239000011163 secondary particle Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 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
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- FUSUHKVFWTUUBE-UHFFFAOYSA-N vinyl methyl ketone Natural products CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 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
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子写真記録法、静電記録法にお蹴る静電荷
像の現像に使用される静電荷現像用トナー（以下、電子
写真用トナーという）に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrostatic charge developing toner (hereinafter referred to as electrophotographic toner) used for developing electrostatic charge images used in electrophotographic recording methods and electrostatic recording methods. (referred to as toner).
電子写真法等では、感光体に形成された静電荷像を、通
常、顔料などを含む電子写真用トナーで現像し、得られ
た可視画像を転写紙上に転写し、熱ローラ等で定着する
。使用される電子写真用トナーがプロセス適合性におい
て優れたものであるためには、流動性、耐ケーキング性
、定着性、帯電性、クリーニング性等において優れてい
ることが必要である。特に、流動性、耐ケーキング性を
高めるために、無機微粉末をトナー粒子に添加すること
が行われており、酸化マグネシウム微粉末を添加するこ
とも特開昭５４−１４７４２号公報等に開示されている
。In electrophotography, an electrostatic image formed on a photoreceptor is usually developed with an electrophotographic toner containing a pigment, and the resulting visible image is transferred onto transfer paper and fixed using a heated roller or the like. In order for the electrophotographic toner to be used to be excellent in process compatibility, it is necessary to have excellent fluidity, caking resistance, fixing properties, charging properties, cleaning properties, and the like. In particular, in order to improve fluidity and caking resistance, inorganic fine powder is added to toner particles, and the addition of magnesium oxide fine powder is also disclosed in JP-A-54-14742. ing.
しかしながら、これらの無機微粉末は、帯電性に大きな
影響を与えてしまう。例えば、一般に用いられているシ
リカ系微粉末の場合、負極性が強く、正帯電トナーの帯
電性を著しく低下してしまい、夏場環境と冬場環境とで
帯電性に大きな差を生じてしまうという問題があり、そ
の結果、背景カブリ、濃度再現不良の原因になることが
あった。However, these inorganic fine powders have a large effect on charging properties. For example, commonly used silica-based fine powder has a strong negative polarity, which significantly reduces the charging performance of positively charged toner, resulting in a large difference in charging performance between summer and winter environments. As a result, background fog and poor density reproduction may occur.
また、酸化アルミニウム微粉末は、高湿時での吸水性が
高く、夏場環境において帯電性が低下し、背景カブリ、
濃度再現不良を引き起こしやすいという問題があった。In addition, aluminum oxide fine powder has high water absorption in high humidity conditions, and its charging properties decrease in summer environments, causing background fog and
There is a problem in that it tends to cause poor density reproduction.
また、これら無機微粉末の分散性もトナー特性に大きな
影響を与え、分散性が不均一な場合、流動性、耐ケーキ
ング性に所望の特性が得られなかったり、クリーニング
不十分になって、感光体上にトナー固着を引き起こし、
黒点状の画像欠陥発生の原因となることがあった。In addition, the dispersibility of these inorganic fine powders also has a large effect on toner properties, and if the dispersibility is uneven, the desired properties in fluidity and caking resistance may not be obtained, or cleaning may be insufficient, resulting in photosensitive Causes toner sticking on the body,
This may cause image defects in the form of black dots.
本発明は、従来の技術における上記のような問題点を改
善することを目的としてなされたものである。The present invention has been made with the aim of improving the above-mentioned problems in the conventional technology.
すなわち、本発明の目的は、高湿環境下においても背景
カブリ、濃度再現不良を引き起こすことがなく、流動性
、耐ケーキング性に優れ、クリーニング性も良好で、黒
点状画像欠陥の発生しない電子写真用トナーを提供する
ことにある。That is, an object of the present invention is to provide electrophotography that does not cause background fog or poor density reproduction even in a high-humidity environment, has excellent fluidity and caking resistance, has good cleaning properties, and does not produce black dot-like image defects. The aim is to provide toner for use in
本発明者等は、上記実状に鑑みて鋭意研究を重ねた結果
、トナー粒子に、−次粒子の数平均粒子径が０．０２ｕ
！ａ以上の酸化マグネシウム単結晶微粉末を添加するこ
とにより、上記目的が達成されることを見出だし、本発
明を完成するに至った。As a result of extensive research in view of the above-mentioned circumstances, the present inventors found that toner particles have a number average particle diameter of -order particles of 0.02u.
! The present inventors have discovered that the above object can be achieved by adding magnesium oxide single crystal fine powder with a particle size of 1 or more, and have completed the present invention.
本発明の電子写真用トナーは、結着樹脂中に着色剤を含
有してなるトナー粒子に、−次粒子の数平均粒子径が０
．０２１Ｉｎ以上の酸化マグネシウム単結晶微粉末を添
加してなることを特徴とする。In the electrophotographic toner of the present invention, toner particles containing a colorant in a binder resin have a number average particle diameter of -order particles of 0.
．． It is characterized by adding magnesium oxide single crystal fine powder of 0.021In or more.
以下、本発明の電子写真用トナーについて詳細に説明す
る。Hereinafter, the electrophotographic toner of the present invention will be explained in detail.
本発明において、トナー粒子に添加する酸化マグネシウ
ム単結晶微粉末は、多結晶微粉末に比べて、吸水性が低
いという特性を有している。この酸化マグネシウム単結
晶微粉末は、必要に応じて、疎水化等の表面処理が施さ
れていてもよい。酸化マグネシウム単結晶微粉末は、−
次粒子の数平均粒子径が０．０２ｍ＋以上であればよい
が、特に０．０２〜ＯＪ ｔｎｎの範囲にあるのが好ま
しい。−次粒子の数平均粒子径が０．０２ｍ＋よりも小
さくなると、分散性が悪くなり、トナーの帯電性を低下
させやすくなり、背景カブリ、濃度再現不良等の問題を
起こしやすくなる。In the present invention, the magnesium oxide single crystal fine powder added to the toner particles has a characteristic of having lower water absorption than the polycrystalline fine powder. This magnesium oxide single crystal fine powder may be subjected to surface treatment such as hydrophobization, if necessary. Magnesium oxide single crystal fine powder is -
It is sufficient if the number average particle diameter of the secondary particles is 0.02 m+ or more, but it is particularly preferable that the number average particle diameter is in the range of 0.02 to OJ tnn. If the number average particle diameter of the -order particles is smaller than 0.02 m+, the dispersibility becomes poor, the toner's chargeability tends to decrease, and problems such as background fog and poor density reproduction tend to occur.
本発明において、上記酸化マグネシウム単結晶微粉末が
添加されるトナー粒子は、結着樹脂中に着色剤が含有さ
れた公知のものが使用できる。In the present invention, known toner particles containing a colorant in a binder resin can be used as the toner particles to which the magnesium oxide single crystal fine powder is added.
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、イソブチ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、酪酸ビニル等の
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、ビニルへキシルケトン、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或いは共重合
体を例示することができる。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
ジェン共重合体、スチレン−無水マレイン酸共重合体、
ポリエチレン、ポリプロピレン等をあげることができる
。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、パラフィン等
をあげることができる。As the binder resin, styrenes such as styrene, chlorostyrene, and vinylstyrene; monoolefins such as ethylene, propylene, butylene, and isobutylene; vinyl acetate,
Vinyl esters such as vinyl propionate, vinyl benzoate, vinyl butyrate; methyl acrylate, ethyl acrylate, butyl acrylate, dodecyl acrylate, octyl acrylate, phenyl acrylate, methyl methacrylate,
α-methylene aliphatic monocarboxylic acid esters such as ethyl methacrylate, butyl methacrylate, dodecyl methacrylate; vinyl methyl ether, vinyl ethyl ether,
Examples include vinyl ethers such as vinyl butyl ether; homopolymers or copolymers of vinyl ketones such as vinyl methyl ketone, vinyl hexyl ketone, and vinyl isopropenyl ketone. In particular, typical binder resins include polystyrene, styrene-alkyl acrylate copolymer, styrene-alkyl methacrylate copolymer,
Styrene-acrylonitrile copolymer, styrene-butadiene copolymer, styrene-maleic anhydride copolymer,
Examples include polyethylene and polypropylene. Furthermore, polyester, polyurethane, epoxy resin,
Examples include silicone resin, polyamide, modified rosin, and paraffin.
また、着色剤としては、カーボンブラック、磁性粉、染
料及び顔料、例えば、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，１，ピグメント・レッド４８：１、ｃ、１
．ピグメント・レッド１２２ 、Ｃ，１，ピグメント・
レッド５７：１、Ｃ，Ｉ。Coloring agents include carbon black, magnetic powder, dyes and pigments, such as nigrosine dye, aniline blue, calcoyl blue, chrome yellow, ultramarine blue, DuPont oil red, quinoline yellow, methylene blue chloride, phthalocyanine blue, malachite. Green Oxalate, Lamp Black, Rose Bengal, C,1, Pigment Red 48:1, C,1
．． Pigment Red 122, C, 1, Pigment
Red 57:1, C, I.
ピグメント・イエロー９７、Ｃ，１，ピグメント・イエ
０−１２、Ｃ，１，ピグメント・ブルー１５：１、ｃ、
１．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。Pigment Yellow 97, C,1, Pigment Yellow 0-12, C,1, Pigment Blue 15:1, c,
1. Pigment Blue 15;3 can be exemplified as a representative example.
これらトナー粒子には、所望により公知の荷電調整剤、
ワックス等の添加剤を含有させてもよい。These toner particles may optionally contain a known charge control agent,
Additives such as wax may also be included.
本発明において、トナー粒子の平均粒子径は、約３０ρ
よりも小さく、特に８〜２０ｍ＋の範囲にあるのが好ま
しい。In the present invention, the average particle diameter of the toner particles is approximately 30ρ.
It is preferably smaller than, particularly in the range of 8 to 20 m+.
本発明の電子写真用トナーは、上記トナー粒子に、上記
の酸化マグネシウム単結晶微粉末を添加し、混合するこ
とによって得ることができる。酸化マグネンウム単結晶
微粉末の添加量は、トナー粒子に対して０．１％〜２０
％（重量）、特に０．３％〜５％（重量）の範囲が好ま
しい。また、混合は、公知の手段、例えば、ヘンシェル
ミキサーやＶ型ブレンダー等によって行うことができる
。The electrophotographic toner of the present invention can be obtained by adding the magnesium oxide single crystal fine powder to the toner particles and mixing them. The amount of magnesium oxide single crystal fine powder added is 0.1% to 20% based on the toner particles.
% (by weight), especially in the range from 0.3% to 5% (by weight). Further, the mixing can be performed by a known means such as a Henschel mixer or a V-type blender.
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。The electrophotographic toner of the present invention may be a one-component toner developer that does not use a carrier, or may be a two-component developer that uses a carrier.
しかしながら、二成分現像剤として用いるのが好ましい
。However, it is preferable to use it 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 using a carrier, there are no particular limitations as long as it is a known carrier, and iron powder carriers, ferrite carriers, surface-coated ferrite carriers, magnetic powder dispersed carriers, and the like can be used.
以下、本発明を実施例によって具体的に説明するが、本
発明は、これら実施例によって同等制限されるものでは
ない。なお、実施例中の「部」は重量部を意味する。EXAMPLES The present invention will be specifically explained below with reference to examples, but the present invention is not limited to the same extent by these examples. Note that "parts" in the examples mean parts by weight.
実施例１
下記成分をバンバリーミキサ−で混練した後、微粉砕し
、分級して、平均粒子径１２虜のトナー粒子を作製した
。Example 1 The following ingredients were kneaded in a Banbury mixer, then finely pulverized and classified to produce toner particles with an average particle size of 12 mm.
スチレン−ｎ−ブチルメタクリレート ８８部共重合
体（共重合比８５：１５、
Ｔｇ−８５℃、Ｍｎ＝１５，０００Ｍｗ−３５，０００
）カーボンブラック（ブラック １０部バール
ズＬ１キャボット社製）
ニグロシン染料（ボントロンＮ−０３，２Ｎ（オリエン
ト化学社製）
上記のようにして得られたトナー粒子１００部に対して
、酸化マグネシウム単結晶微粉末（一次粒子の数平均粒
子径＋ ０．０４５〜０．０６ρ、宇部興産■製）２部
を添加し、ヘンシェルミキサーにより混合して、トナー
粒子表面に付着させて電子写真用トナーを作製した。Styrene-n-butyl methacrylate 88 parts copolymer (copolymerization ratio 85:15, Tg-85°C, Mn=15,000Mw-35,000
) Carbon black (black 10 parts Baars L1 manufactured by Cabot) Nigrosine dye (Bontron N-03, 2N (manufactured by Orient Chemical Co.) Magnesium oxide single crystal fine powder per 100 parts of the toner particles obtained as described above (Number average particle diameter of primary particles + 0.045 to 0.06ρ, manufactured by Ube Industries, Ltd.) 2 parts were added, mixed using a Henschel mixer, and adhered to the surface of the toner particles to prepare an electrophotographic toner.
次に、スチレン−ｎ−ブチルメタクリレート共重合体（
藤倉化成社製）３０部及びマグネタイト（ＥＰＴｉＯＯ
Ｏ、戸田工業社製）７０部を混練し、粉砕して、平均粒
子径４０−のキャリアを得た。Next, styrene-n-butyl methacrylate copolymer (
30 parts (manufactured by Fujikura Kasei Co., Ltd.) and magnetite (EPTiOO)
70 parts (manufactured by Toda Kogyo Co., Ltd.) were kneaded and pulverized to obtain a carrier having an average particle diameter of 40.
上記の電子写真用トナー１０部とキャリア９０部を混合
して、電子写真現像剤とし、電子写真複写機（ＦＸ５０
７０、富士ゼロックス■製）により、５万枚のランニン
グテスト及び環境テストを行った。10 parts of the above electrophotographic toner and 90 parts of carrier were mixed to make an electrophotographic developer, and the electrophotographic developer was prepared using an electrophotographic copying machine (FX50
70, manufactured by Fuji Xerox ■), a running test of 50,000 sheets and an environmental test were conducted.
実施例２
酸化マグネシウム単結晶微粉末（一次粒子の数平均粒子
径： ｏ、ｔｇ〜０．２５ｍ１、宇部興産■製）２部を
、実施例１のトナー粒子１００部に添加し、ヘンシェル
ミキサーで混合して、トナー粒子表面に付着させた以外
は、実施例１と同様にして電子写真用トナーを作製し、
同様にランニングテスト及び環境テストを行った。Example 2 2 parts of magnesium oxide single crystal fine powder (number average particle diameter of primary particles: o, tg ~ 0.25 m1, manufactured by Ube Industries, Ltd.) was added to 100 parts of the toner particles of Example 1, and the mixture was mixed with a Henschel mixer. An electrophotographic toner was prepared in the same manner as in Example 1, except that the toner was mixed and attached to the toner particle surface.
Similarly, running tests and environmental tests were conducted.
比較例１
酸化マグネンウム単結晶微粉末（一次粒子の数平均粒子
径： ｏ、ｏｉ〜０．０１６節、宇部興産■製）２部を
、実施例１のトナー粒子１００部に添加し、ヘンシェル
ミキサーで混合して、トナー粒子表面に付着させた以外
は、実施例１と同様にして電子写真用トナーを作製し、
同様にランニングテスト及び環境テストを行った。Comparative Example 1 2 parts of magnesium oxide single crystal fine powder (number average particle diameter of primary particles: o, oi ~ 0.016, manufactured by Ube Industries, Ltd.) was added to 100 parts of the toner particles of Example 1, and a Henschel mixer was added. An electrophotographic toner was prepared in the same manner as in Example 1, except that the toner was mixed with the toner and adhered to the surface of the toner particles.
Similarly, running tests and environmental tests were conducted.
比較例２
酸化マグネシウム微粉末（多結晶）（平均粒子径： ０
．４ ａｍ、旭硝子■製）２部を、実施例１のトナー粒
子１００部に添加し、ヘンシェルミキサーで混合して、
トナー粒子表面に付着させた以外は、実施例１と同様に
して電子写真用トナーを作製し、同様にランニングテス
ト及び環境テストを行った。Comparative Example 2 Magnesium oxide fine powder (polycrystalline) (average particle size: 0
．． 4 am, manufactured by Asahi Glass ■) were added to 100 parts of the toner particles of Example 1, and mixed with a Henschel mixer.
An electrophotographic toner was prepared in the same manner as in Example 1, except that it was attached to the surface of the toner particles, and a running test and an environmental test were conducted in the same manner.
実施例１及び２、及び比較例１及び２におけるランニン
グテスト及び環境テストの結果を第１表に示す。Table 1 shows the results of the running test and environmental test in Examples 1 and 2 and Comparative Examples 1 and 2.
以下余白
〔発明の効果〕
本発明の電子写真用トナーは、上記の酸化マグネシウム
単結晶微粉末を添加してなるから、高温環境下において
も、背景カブリ、濃度再現不良がなく、さらに黒点状画
質欠陥も発生せず、良好な画質の画像を得ることができ
る。The following margins [Effects of the Invention] Since the electrophotographic toner of the present invention is made by adding the above-mentioned magnesium oxide single crystal fine powder, there is no background fogging or poor density reproduction even in a high temperature environment, and there is no black dot image quality. No defects occur and images of good quality can be obtained.
出願人 富士ゼロックス株式会社Applicant: Fuji Xerox Co., Ltd.
Claims (1)
、一次粒子の数平均粒子径が０．０２μｍ以上の酸化マ
グネシウム単結晶微粉末を添加してなることを特徴とす
る電子写真用トナー。(1) Electrophotography characterized by adding magnesium oxide single crystal fine powder having a number average primary particle diameter of 0.02 μm or more to toner particles containing a colorant in a binder resin. toner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2265170A JPH04142560A (en) | 1990-10-04 | 1990-10-04 | Electrophotographic toner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2265170A JPH04142560A (en) | 1990-10-04 | 1990-10-04 | Electrophotographic toner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04142560A true JPH04142560A (en) | 1992-05-15 |
Family
ID=17413565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2265170A Pending JPH04142560A (en) | 1990-10-04 | 1990-10-04 | Electrophotographic toner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04142560A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007065245A (en) * | 2005-08-31 | 2007-03-15 | Canon Inc | Toner |
| JP2007121754A (en) * | 2005-10-28 | 2007-05-17 | Canon Inc | Toner |
| EP1852747A1 (en) * | 2004-11-19 | 2007-11-07 | Canon Kabushiki Kaisha | Positively chargeable developer |
-
1990
- 1990-10-04 JP JP2265170A patent/JPH04142560A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1852747A1 (en) * | 2004-11-19 | 2007-11-07 | Canon Kabushiki Kaisha | Positively chargeable developer |
| US7740998B2 (en) | 2004-11-19 | 2010-06-22 | Canon Kabushiki Kaisha | Positively chargeable developer |
| EP1852747B1 (en) * | 2004-11-19 | 2014-01-22 | Canon Kabushiki Kaisha | Positively chargeable developer |
| JP2007065245A (en) * | 2005-08-31 | 2007-03-15 | Canon Inc | Toner |
| JP4603958B2 (en) * | 2005-08-31 | 2010-12-22 | キヤノン株式会社 | toner |
| JP2007121754A (en) * | 2005-10-28 | 2007-05-17 | Canon Inc | Toner |
| JP4569900B2 (en) * | 2005-10-28 | 2010-10-27 | キヤノン株式会社 | toner |
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