公开(公告)号：JPH04281468A

公开(公告)日：1992-10-07

申请号：JP4517091

申请日：1991-03-11

Applicant: TORAY INDUSTRIES

Inventor： KITAMURA KAZUO ,  ARIMA HIROAKI

IPC: G03G9/13 ,  G03G9/12

Abstract: PURPOSE:To obtain the developer which is excellent in all of dispersibility, redispersibility, electrostatic chargeability, and preservable stability by incorporating a specific monofunctional macromonomer as an essential component into this developer and to obtain the images of high density and high quality with the high and stable electric resistance of the liquid. CONSTITUTION:This developer contains the monofunctional macromonomer formed by bonding the polymerizable double bond groups of formula II to one terminal of the main chain of a polymer consisting of the repeating unit of formula I as the essential polymerization component of a dispersion stabilizer and contains a copolymer which is soluble or swellable in a carrier liquid. In the formula, X denotes -COO-, -OCO-, CH2OCO-, -CH2COO-, -O-, or phenylene group; Y denotes 1 to 22C hydrocarbon group or hydrogen atom; a, b may be the same as or different from each other and respectively denote a hydrogen atom, halogen atom, cyan group or 1 to 8C hydrocarbon. Z is synonymous with X and C and d may be the same as or different from each other and are respectively synonymous with a or b.

公开(公告)号：JPH03296770A

公开(公告)日：1991-12-27

申请号：JP10109590

申请日：1990-04-17

Applicant: TORAY INDUSTRIES

Inventor： ARIMA HIROAKI ,  KITAMURA KAZUO

IPC: G03G9/08

Abstract: PURPOSE:To obtain the capsule toner which can be fixed under a low pressure, is not degraded in electric resistance at the time of high humidity and has good mechanical strength by mainly constituting the shell of a polyurethane resin formed by the reaction of a polyvalent hydroxy compd. and a polyvalent isocyanate. CONSTITUTION:The shell consists mainly of the polyurethane resin formed by the reaction of the polyvalent hydroxy compd. having at least >= 1 nitro groups in the molecule and the polyvalent isocyanate. On the other hand, the fixing component constituting a core material is the liquid material which is liable to adhere to paper, etc., by blowing out of the inside of the capsule when the capsule is crushed by a pressure. This material is constituted mainly of a resin and org. solvent. The capsule toner which can be fixed under the low pressure, is not degraded in the electric resistance at the time of high moisture and has the improved mechanical strength is obtd. in this way.

公开(公告)号：JPH03228067A

公开(公告)日：1991-10-09

申请号：JP2280190

申请日：1990-02-01

Applicant: TORAY INDUSTRIES

Inventor： ARIMA HIROAKI ,  KITAMURA KAZUO

IPC: G03G9/08

Abstract: PURPOSE:To provide an encapsulated toner fixable under low pressure without causing offset trouble and restrained from dropout of fixed images by specifying a fixing resin to orgnic solvent ratio in the microencapsulated toner comprising outer shells and cores composed of the fixing component consisting of the resin and a colorant and the organic solvent. CONSTITUTION:The toner capsule comprises the core material containing the fixing component consisting of the fixing resin and the organic solvent capable of dissolving or swelling the resin, and the colorant and the outer shell covering this core material. The resin has a weight average molecular weight of 5X10 -1X10 and is contained in an amount of 40-95 wt.% of the fixing component of the resin and the solvent. If it is 95wt.%, the viscosity of the fixing component is made too high, and offset trouble is made liable to occur.

公开(公告)号：JPH047559A

公开(公告)日：1992-01-10

申请号：JP10992090

申请日：1990-04-25

Applicant: TORAY INDUSTRIES

Inventor： ARIMA HIROAKI

IPC: G03G9/08 ,  G03G9/087

Abstract: PURPOSE:To obtain an encapsulated toner excellent in mechanical strength and powder characteristics and capable of fixing at a low pressure by consisting an outer shell of a specific polyester resin. CONSTITUTION:In the toner with the configuration of a microcapsule constituted of a core material consisting of a fixing component and a coloring agent and the outer shell covering the circumference of the core material, the polyester resin formed from a reaction of polyvalent acid chloride with a Li salt of a polyhydric phenol compound is incorporated in the outer shell as a main component. As the polyvalent acid chlorides used for it, sebacic acid chloride, adipic acid chloride, etc., are exemplified and as Li salts of polyhydric phenol compounds forming the polyester resin after the reaction with the polyvalent acid chloride, resorcinale, etc., is exemplified. Thus, the encapsulated toner capable of fixing at a low pressure and with improved mechanical strength and powder characteristics is obtained.

公开(公告)号：JPH02101477A

公开(公告)日：1990-04-13

申请号：JP25677088

申请日：1988-10-11

Applicant: TORAY INDUSTRIES

Inventor： ARIMA HIROAKI

IPC: G03G9/087

Abstract: PURPOSE:To obtain a toner superior in low temperature heat fixability and not causing agglomeration with each other in itself by preparing the fixing component comprising a base polymer, a wax, and an tackifying resin. CONSTITUTION:The 100pts.wt. of the fixing component comprises 10-90pts.wt. of the base polymer, 9-60pts.wt. of the wax, and 1-30pts.wt. of the tackifying resin. If the base polymer is more than 90pts.wt., the fixing component rises in the melting point and deteriorates in low temperature fixability, if the wax is less than 9pts.wt., the fixing component rises in the melting point, and if it is more than 60pts.wt., it tends to cause offset trouble, and if the tackifying resin is less then 1pts.wt., the low temperature fixability is made liable to deteriorate, and if more than 30pts.wt., offset trouble is made liable to occur.

公开(公告)号：JPH03228066A

公开(公告)日：1991-10-09

申请号：JP2280090

申请日：1990-02-01

Applicant: TORAY INDUSTRIES

Inventor： ARIMA HIROAKI

IPC: G03G9/08

Abstract: PURPOSE:To provide an encapsulated toner fixable under low pressure and good in triboelectrifiability and releasability in cleaning by forming semispherical projecting structural units on the whole surfaces of the outer shells of the toner capsules. CONSTITUTION:The toner capsule comprises a core material composed of a fixing component and a colorant and the outer shell covering this core material. The whole surface of the outer shell is provided with semispherical projecting structural units, preferably, made of a vinyl polymer or the like, and the sizes of the units are not especially limited, but it is preferred to form the semispherical projecting structural unit having a diameter of 0.01-2mum and a height of 0.001-2 mum from the viewpoint of enhancing triboelectrifiability and releasability in cleaning and preventing the fluidity of the capsules from deterioration and ensuring superior development performance.

公开(公告)号：JPH02118668A

公开(公告)日：1990-05-02

申请号：JP27386888

申请日：1988-10-28

Applicant: TORAY INDUSTRIES

Inventor： ARIMA HIROAKI

IPC: G03G9/08 ,  G03G9/093

Abstract: PURPOSE:To increase the strength of a core while maintaining the fixability and to obtain a capsulated toner having such satisfactory strength that the toner is not broken even in a developing device by gelatinizing a fixing component in the core material. CONSTITUTION:A shell is formed around a core material by interfacial polymn. or in-situ polymn. and a fixing component in the core material is allowed to exist as a gelatinized resin soln. or dispersion by adding a gelatinizer to a resin soln. or dispersion or using a resin soln. or dispersion liable to gelatinize at a temp. close to room temp. as the principal component of the core. Naphthenic acid or oleic acid may be used as the gelatinizer. The strength of the core is increased while maintaining the fixability and a capsulated toner having such satisfactory strength that the toner is not broken even in a developing device is obtd.