| Patent Number |
Title Of Patent |
Date Issued |
| 7553565 |
Magnetic recording medium |
June 30, 2009 |
| A magnetic recording medium is provided that includes a support and at least one magnetic layer provided on or above the support, the magnetic layer including a ferromagnetic powder dispersed in a binder and at least one type of compound selected from Formulae (I) to (III) below; ##S |
| 7501194 |
Magnetic recording media with non-magnetic support and radiation cured layer |
March 10, 2009 |
| A magnetic recording medium is provided that includes a non-magnetic support, a radiation-cured layer cured by exposing a layer containing a radiation curing compound to radiation, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder. The radiation-cured layer and |
| 7449257 |
Magnetic recording medium and production process therefor |
November 11, 2008 |
| A magnetic recording medium is provided that includes a non-magnetic support, and at least one magnetic layer provided above the non-magnetic support, the magnetic layer having a ferromagnetic powder dispersed in a binder, all or part of the binder being a polyurethane resin obtained by |
| 7348079 |
Magnetic recording medium |
March 25, 2008 |
| A magnetic recording medium is provided that has on a non-magnetic support, in order, a radiation-cured layer formed by curing a layer containing a radiation curing compound by exposure to radiation, a lower layer having a non-magnetic powder and/or a magnetic powder dispersed in a b |
| 7344786 |
Magnetic recording medium including a smooth coating layer on one side of the support |
March 18, 2008 |
| A magnetic recording medium comprising a support having provided thereon a magnetic layer, wherein a smooth coating layer having a thickness of from 0.10 to 1 .mu.m, surface roughness of 5 nm or less, and 20 or less per 900 .mu.m.sup.2 of the protrusions having a height of 20 nm or more |
| 7282279 |
Magnetic recording medium including a radiation-cured material layer having a specified structur |
October 16, 2007 |
| A magnetic recording medium is provided that includes a non-magnetic support and, in order, above the non-magnetic support, a radiation-cured material layer cured by exposing a layer that includes a radiation curable compound to radiation, and a magnetic layer that includes a fine fe |
| 7198817 |
Process for producing magnetic recording medium |
April 3, 2007 |
| A process for producing a magnetic recording medium having at least one magnetic layer formed above a support is provided. The process includes a step of providing, on at least one side of the support, a smoothing coating layer having a thickness of 0.10 to 1 .mu.m, a surface roughness |
| 7169438 |
Magnetic recording medium |
January 30, 2007 |
| A magnetic recording medium comprising a support having provided thereon a magnetic layer, wherein a smooth coating layer having a thickness of from 0.10 to 1 .mu.m, surface roughness of 5 nm or less, and 20 or less per 900 .mu.m.sup.2 of the protrusions having a height of 20 nm or more |
| 7041395 |
Magnetic recording medium |
May 9, 2006 |
| A magnetic recording medium is provided which includes, in order on a non-magnetic support, a radiation-cured layer formed by curing a layer containing a radiation curing compound by exposure to radiation, a middle layer having a non-magnetic powder dispersed in a binder (1), the middle |
| 6939606 |
Magnetic recording medium |
September 6, 2005 |
| A magnetic recording medium is provided that includes, in order, (1) a non-magnetic support, a radiation-cured layer formed by applying a layer containing a radiation curing compound and curing by exposure to radiation, and a magnetic layer having a ferromagnetic powder dispersed in |
| 6773789 |
Magnetic recording medium |
August 10, 2004 |
| A magnetic recording medium is disclosed, comprising an undercoat layer formed by a radiation-curing resin provided on a support and at least magnetic layer containing a ferromagnetic powder and a binder provided thereon, wherein the radiation-curing resin is a compound having an ali |
| 6686073 |
Magnetic recording medium containing specific binder in the magnetic layer and the lower non-mag |
February 3, 2004 |
| A magnetic recording medium containing a support having provided thereon a lower layer containing a nonmagnetic powder and a binder and further provided thereon at least one magnetic layer containing a ferromagnetic powder and a binder. The lower layer can contain as a binder at least a |
| 6623849 |
Magnetic recording medium |
September 23, 2003 |
| A magnetic recording medium comprises: a support; an underlayer containing a non-magnetic powder and a binder; and at least one magnetic layer containing a binder and one of a ferromagnetic metal powder having an average major axis of 0.01 .mu.m to 0.10 .mu.m and a crystallite size of |
| 6610426 |
Magnetic recording medium containing a binder of trifunctional or higher aliphatic (meth) acryla |
August 26, 2003 |
| Provided is a magnetic recording medium achieving high durability, a high degree of smoothness, and a magnetic layer of uniform thickness, and having substantially better electromagnetic characteristics. A magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic |
| 6149989 |
Magnetic recording particulate medium |
November 21, 2000 |
| The present invention discloses a magnetic recording particulate mediumhaving amagnetic layer on anonmagnetic support, the magnetic layer containing a ferromagnetic metal powder and a binder and having a coercive force of 1,400 to 1,700 Oe, wherein the ferromagnetic metal powder is s |
| 5891608 |
Photographic processing composition in slurry-form |
April 6, 1999 |
| In a slurry-form photographic processing composition, some of photographic processing components are dispersed in water in fine particulate form, and a water-soluble polymer is contained in an amount of 0.1-10% by weight based on the weight of the processing components. The slurry compos |
| 5876833 |
Magnetic recording medium containing magnetic powder and a polyurethane binder having a specifie |
March 2, 1999 |
| A magnetic recording medium is disclosed, comprising a magnetic layer mainly comprising a ferromagnetic powder and a binder resin formed on at least one side of a non-magnetic support, wherein said magnetic layer has a thickness of from 0.05 .mu.m to 0.8 .mu.m, said ferromagnetic powder |
| 5795645 |
Magnetic recording medium |
August 18, 1998 |
| A magnetic recording medium is disclosed, comprising a magnetic layer comprising a ferromagnetic powder and a binder provided on one side of a non-magnetic support and a backing layer provided on another side of said non-magnetic support, wherein said ferromagnetic powder is a ferromagne |
| 5578376 |
Magnetic recording medium having a magnetic layer comprising a specified ferromagnetic metal pow |
November 26, 1996 |
| A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic powder and a binder, the ferromagnetic powder comprising a ferromagnetic metal powder comprising Fe and having a crystal size of from 120 to 250 .ANG. and a Co content o |
| 5458979 |
Magnetic recording medium having a magnetic layer comprising ferromagnetic particles, polyuretha |
October 17, 1995 |
| A magnetic recording medium comprising a nonmagnetic support having on at least one side thereof a magnetic layer comprising a ferromagnetic particle and a binder, wherein the binder comprises a polyvinyl acetal resin having a polar group and a polyurethane resin having a polar group; |
| 5387464 |
Magnetic recording medium |
February 7, 1995 |
| A magnetic recording medium is disclosed, comprising a non-magnetic support with an undercoating layer having formed thereon one or more magnetic layers. The undercoating layer contains a polyester resin or polyurethane resin having at least one polar group selected from the group consis |
| 5368949 |
Magnetic recording medium having specific subbing layers and process for recovery and processing |
November 29, 1994 |
| A magnetic recording medium comprising a subbing layer provided between a nonmagnetic plastic support and at least one of a magnetic layer and a backing layer, the magnetic layer and the backing layer each having a void of 40% by volume or less, and the subbing layer having higher solubi |
| 5336561 |
Magnetic recording medium |
August 9, 1994 |
| A magnetic recording medium comprising a non-magnetic support having thereon an undercoating layer and a magnetic layer, wherein the undercoating layer is provided between the non-magnetic support and magnetic layer, and a binder used for the undercoating layer comprises a resin havi |
| 5258231 |
Magnetic recording medium having ferromagnetic powder, a binder containing a specified vinyl chl |
November 2, 1993 |
| A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder and a binder material, wherein the magnetic layer contains at least a vinyl chloride copolymer binder having at least one polar group selected from |
| 5254404 |
Magnetic recording medium comprising ferromagnetic particles having crystallite size of less tha |
October 19, 1993 |
| A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon at least one magnetic recording layer comprising a dispersion of ferromagnetic particles in a binder, said binder comprising the combination of a polyisocyanate and a polyurethane binder comprising |
| 5244736 |
Magnetic recording medium having multiple magnetic layers with specified compositions |
September 14, 1993 |
| A magnetic recording medium comprising a non-magnetic support having thereon a multi-layer magnetic layer structure comprising ferromagnetic fine powder and a binder, wherein said multi-layer magnetic layer structure is formed by coating a first composition containing the ferromagnet |
| 5176955 |
Magnetic recording medium comprising ferromagnetic powder having a pH of at least 7 dispersed in |
January 5, 1993 |
| A magnetic recording medium improved in electromagnetic characteristics, running durability and running properties is disclosed, comprising a non-magnetic support and at least one magnetic layer formed thereon, said magnetic layer having a ferromagnetic powder dispersed in a binder, |
| 5165999 |
Magnetic recording medium containing a polyurethane resin having a modified amine acid incorpora |
November 24, 1992 |
| A magnetic recording medium which comprises a nonmagnetic support having provided thereon a magnetic layer comprising ferromagnetic metal powder dispersed in a binder, wherein the binder containsa polyurethane resin having a ##STR1## group introduced therein, wherein R represents a h |
| 5153071 |
Magnetic recording medium wherein the magnetic layer has as the binder system a vinyl chloride c |
October 6, 1992 |
| A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic particles disposed in a binder, the binder comprising a vinyl chloride copolymer and a polyurethane resin, wherein the polyurethane resin is a polyether polyurethane |
| 5153053 |
Magnetic recording medium comprising a lower magnetic layer containing an amine modified vinyl c |
October 6, 1992 |
| A magnetic recording medium excellent in video output and audio output is disclosed which comprises a non-magnetic support having thereon at least plurality of a first magnetic layer and a second magnetic layer, containing ferromagnetic particles dispersed in a binder, in that sequen |
| 5141808 |
Magnetic recording medium having two magnetic layers each containing a specified polyurethane re |
August 25, 1992 |
| A magnetic recording medium comprising a nonmagnetic support having thereon a lower magnetic layer and a upper magnetic layer, in this order, wherein the lower magnetic layer contains as a binder a polyurethane reisn having a number average molecular weight of less than 25,000, and the u |
| 5132179 |
Magnetic recording medium comprising plural magnetic layers |
July 21, 1992 |
| A magnetic recording medium comprising a non-magnetic support having thereon plural magnetic layers comprising a fine ferromagnetic powder and a binder and which are composed of at least two magnetic layers. In preparing the medium, a first magnetic layer-coating composition containi |
| 5126215 |
Magnetic recording medium having a surface with pores of specified average inlet diameter and wi |
June 30, 1992 |
| A magnetic recording medium comprising a nonmagnetic support having formed thereon a magnetic layer containing ferromagnetic particles dispersed in a binder, wherein the surface of the magnetic layer has pores of (a) at most 50 .ANG. in the average value of pore inlet diameters measured |
| 5093172 |
Magnetic recording medium comprising a vinyl chloride copolymer containing a polar group and a p |
March 3, 1992 |
| A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer comprising ferromagnetic metal particles and binder resins, in which 35 to 55% by weight of said binder resins are a polar group-containing vinyl chloride copolymer and 10 to 25% by |
| 5091238 |
Floppy disk comprising a cellulosic resin with a polar group in a side chain and perromagnetic p |
February 25, 1992 |
| A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer comprising mainly ferromagnetic metal particles of a specific surface area and binder resins, wherein at least part of said binder resins is a cellulosic resin having in side chains |
| 5084341 |
Magnetic recording medium comprising a polyurethane resin having a thio, thiocarboxy or dithioca |
January 28, 1992 |
| A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising ferromagnetic metal particles dispersed in a binder, wherein said ferromagnetic metal particles have a crystalline size of 250 .ANG. or less, and said binder comprises(i) a p |
| 5082733 |
Magnetic recording medium containing magnetic particles surface treated with a glycidyl compound |
January 21, 1992 |
| A method for preparing a magnetic recording medium is disclosed, comprising the steps of (1) surface-treating ferromagnetic particles with a glycidyl compound having a molecular weight of 1,000 or less and having an epoxy equivalent of 200 g/eq. or less, (2) dispersing the surface-treate |
| 5079085 |
Magnetic recording medium containing a binder which is chemically bonded to crosslinked resin fi |
January 7, 1992 |
| A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising ferromagnetic fine powder dispersed in a binder, wherein said magnetic layer contains crosslinked resin fine particles to which a polymer containing an --OH group has been |
| 5073439 |
Magnetic recording medium comprising a vinyl chloride based resin group containing an epoxy grou |
December 17, 1991 |
| A novel magnetic recording medium is disclosed comprising a non-magnetic support having provided thereon a magnetic layer containing a ferromagnetic powder and a binder, the ferromagnetic powder having a crystalline size of 250 .ANG. or less, and the surface of the magnetic layer hav |
| 5061564 |
Magnetic recording medium comprising a polar group containing resin or compound and a methyl iso |
October 29, 1991 |
| A magnetic recording medium is disclosed, which comprises a non-magnetic support having provided thereon a magnetic layer mainly composed of a ferromagnetic powder and a binder resin comprising (i) a polymer having at least one polar group selected from --SO.sub.3 M.sup.1, --OSO.sub.3 |
| 5055352 |
Ferromagnetic thin film magnetic recording medium having an intermediate layer containing ultraf |
October 8, 1991 |
| A ferromagnetic thin film type magnetic recording medium is disclosed, comprising a nonmagnetic intermediate layer formed between a nonmagnetic support and a magnetic layer, the intermediate layer containing a binder resin and ultrafine particles, wherein the ultrafine particles have a |
| 5049448 |
Magnetic recording medium containing an ester lubricant branched from the number 2 carbon positi |
September 17, 1991 |
| A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer, wherein at least one of ester compounds represented by formula (I) is present in or on the magnetic layer, ##STR1## wherein R.sub.1 represents a straight chain, saturated alkyl |
| 5045351 |
Process for producing a magnetic recording medium |
September 3, 1991 |
| A process for producing a magnetic recording medium which comprises a step of kneading a ferromagnetic powder with a binder in the presence of a solvent, a step of dispersing the resulting blend with the binder and/or solvent, and a step of coating the resulting magnetic coating composit |
| 5030481 |
Process of producing magnetic recording medium |
July 9, 1991 |
| A process of producing a magnetic recording medium comprising the steps of kneading ferromagnetic fine particles and a binder using an organic solvent to prepare a kneaded mixture, dispersing said kneaded mixture with the addition of an additional binder and/or an additional organic solv |
| 4976989 |
Method for preparing a magnetic recording medium |
December 11, 1990 |
| A method for preparing a magnetic recording medium comprises the steps of coating, on a non-magnetic support, a magnetic layer mainly containing ferromagnetic particles and a binder polymerizable by radiation exposure, conducting a calendering treatment, and thereafter conducting a radia |
| 4959263 |
Magnetic recording medium |
September 25, 1990 |
| A magnetic recording medium is described, comprising a nonmagnetic support having thereon a magnetic layer containing a binder which is cross-linkable or polymerizable by radiation irradiation and ferromagnetic particles, the ferromagnetic particles being metal or metal alloy particl |
| 4812351 |
Magnetic recording medium |
March 14, 1989 |
| A magnetic recording medium is described, comprising a non-magnetic support having a surface roughness of 0.02 .mu.m or less, a magnetic layer on the surface of the support and a backing layer on a surface of the support opposite to the surface on which the magnetic layer is formed, wher |
| 4781965 |
Magnetic recording medium |
November 1, 1988 |
| A magnetic recording medium is described, comprising a non-magnetic support having coated thereon a non-magnetic layer and a magnetic layer in that order, with the surface roughness of the surface of the support on the side opposite from the magnetic layer being 0.007 .mu.m or more, and |
| 4716077 |
Magnetic recording medium |
December 29, 1987 |
| A magnetic recording medium is described, comprising a non-magnetic support and a magnetic layer, said magnetic layer containing as a binder at least one compound selected from each of compound groups (A) and (B) that has been exposed to radiation, wherein(A) is polyvinyl chloride type c |
| 4707380 |
Process for preparing a magnetic recording medium |
November 17, 1987 |
| A process for preparing a magnetic recording medium is described, comprising subjecting a surface of a non-magnetic support having a surface roughness of not less than 0.01 .mu.m to a non-contact surface treatment, providing a layer containing a compound polymerizable by radiation ex |
