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7477444 |
Electro-optic display and materials for use therein
A polyurethane is formed from an isocyanate and a polyester diol having a molecular weight less than about 2000, or a polyester diol comprising two polyester diol segments connected by a steric...
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7449257 |
Magnetic recording medium and production process therefor
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...
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6759150 |
Magnetic recording medium comprising urethane binder of specific Tg
A magnetic recording medium includes: a non-magnetic support; a lower non-magnetic layer; and a magnetic layer containing a ferromagnetic powder and a binder, in this order, wherein the magnetic...
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6139982 |
Magnetic recording medium having a binder system including a polyurethane polymer having both phosphonate and quaternary ammonium pendant groups
A magnetic recording medium comprising a magnetic layer provided upon a major surface of a substrate, wherein the magnetic layer includes a magnetic pigment, and a polymeric binder system...
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6139966 |
Carboxylic acid functional polyurethane polymers and blends thereof used in magnetic recording media
The invention provides novel macromonomer and carboxyl functional polyurethanes having a high carboxyl content. The invention further provides dispersions, coatings and magnetic recording media...
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6132880 |
EMTEC magnetics GmbH
The thermoplastic, isocyanate-free polyurethane which contains acidic groups, is soluble in tetrahydrofuran, has a molecular weight of from 15,000 to 70,000 and is composed of A) 1 mol of a...
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6025456 |
Polyurethanes
Hydroxyl-containing polyurethanes I are composed essentially of a) a diisocyanate of 6 to 30 carbon atoms (component II), b) a component III comprising α) an aliphatic diol of 2 to 20...
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5922469 |
Materials suitable as crosslinkable binder components
Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting 1) a polyurethane (II) comprising a) 1 mol of a diol (III) having an average...
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5908691 |
Magnetic recording medium having a lower layer containing a specified polyurethane binder
The present invention provides a magnetic recording medium having high durability and excellent electromagnetic transfer characteristics and having a lower coating layer, which contains a binder...
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5876833 |
Magnetic recording medium containing magnetic powder and a polyurethane binder having a specified radius of gyration
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...
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5718978 |
Magnetic recording medium having a magnetic layer which includes magnetic particles, polurethane resin, vinyl chloride copolymer, and an amine compound
The present invention provides a magnetic recording medium which allows high density recording and exhibits excellent output characteristics and durability. A novel magnetic recording medium...
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5702821 |
Magnetic recording medium comprising ferromagnetic powder and a specified polyurethane resin
In a binder for a magnetic recording medium for forming a magnetic layer with ferromagnetic powder dispersed therein being arranged on a non-magnetic support member, whereby said binder consists of...
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5695884 |
Thermoplastic polyurethane
A thermoplastic polyurethane composition of the present invention includes a thermoplastic polyurethane obtained by reacting at least the following components A, B, and C: (A) a polyester polyol...
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5578376 |
Magnetic recording medium having a magnetic layer comprising a specified ferromagnetic metal powder and a specified polyurethane binder
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...
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5512651 |
Strong carboxylic acid functional polyurethane polymers and blends thereof used in magnetic recording media
The invention provides novel hydroxyl functional polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise strong carboxylic acid groups pendant from the...
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5482777 |
Magnetic recording media and composition containing a specified polyurethane binder
According to this invention, there is provided a binder containing a polyurethane resin having an urethane bond and formed by the reaction of a diisocyanate and a polyol, said resin containing on...
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5415941 |
Magnetic recording medium comprising magnetic particles and a specified polyurethane resin
A magnetic recording medium comprise a non-magnetic support and a magnetic layer formed thereon which is made of a composition comprising ferromagnetic particles and a resinous binder. The resinous...
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5413862 |
Magnetic recording medium having a magnetic layer comprising a specified polyurethane resin and magnetic particles
According to the present invention, a magnetic recording medium having a non-magnetic support and a magnetic layer formed thereon is provided. The magnetic layer is formed from a composition...
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5401571 |
Magnetic recording media having a binder comprising a sulfobetaine containing polyurethane resin
The sulfobetaine-containing resin has much improved affinity for magnetic powders. Therefore, by using the same as a binder, it becomes possible to attain good dispersion of magnetic powders...
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5330669 |
Magnetic coating formulations
A polyurethane resin is synthesized from a reaction mixture of at least one phosphorus compound, an epoxy compound, a polyisocyanate, a polyfunctional hydroxy compound, and optionally a chain...
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5273826 |
Magnetic coating formulations and magnetic recording media
A polyurethane resin is synthesized from a reaction mixture of at least one phosphorus compound, an epoxy compound, a polyisocyanate, a polyfunctional hydroxy compound, and optionally a chain...
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5266408 |
Magnetic recording media
Magnetic recording media consist of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consisting of not less than 50% by...
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5260136 |
Magnetic recording medium comprising a cured dispersion coating of sulfonated hydroxy-functional polyurethane binder and magnetizable pigment
The present invention concerns magnetic recording media comprising fine, magnetizable pigment or particles dispersed within a binder and supported on a substrate. The invention particularly...
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5254404 |
Magnetic recording medium comprising ferromagnetic particles having crystallite size of less than 450 angstroms and a specified polyurethane binder
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...
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5244739 |
Magnetic recording media comprising a cured dispersion coating of a magnetizable pigment and polyurethane polymer containing a vinyl polymeric segment pendant from the polyurethane backbone
The invention relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated...
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5240972 |
Carbamate modified sulfonated and non-sulfonated hydroxy-functional polyurethane macroiniferter compounds, copolymers made therewith, and magnetic recording media prepared therefrom
The present invention relates to an iniferter compound of the formula I(T) n wherein I represents the free radical initiator portion of the iniferter compound and wherein I comprises a...
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5219663 |
Magnetic recording medium having a magnetic layer formed from an aromatic polycarbonate polyurethane resin
A polycarbonate polyol having a main chain of the formula: ##STR1## wherein R is an aliphatic or alicyclic hydrocarbon group having 4 to 10 carbon atoms, and n is a number of 2.00 to 20.00, and...
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5185423 |
Method of making sulfonated hydroxy-functional polyurethane binder for magnetic recording media
The present invention concerns magnetic recording media comprising fine, magnetizable pigment for particles dispersed within a binder and supported on a substrate. The invention particularly...
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5169721 |
Magnetic recording media comprising a polyurethane binder resin containing perfluoro groups
Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon and is based on a polyurethane binder, not less than 50% by weight of...
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5165999 |
Magnetic recording medium containing a polyurethane resin having a modified amine acid incorporated into the resin
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 contains a...
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5158830 |
Magnetic recording medium comprising a polyurethane resin coating residual groups derived from specified phosphorous containing compounds
A magnetic coating formulation is composed principally of magnetic particles and a binder. At least a portion of the binder is a polyurethane resin synthesized from a reactant mixture of specific...
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5151330 |
Magnetic recording medium comprising magnetic particles and a polyurethane resin binder having a polycaprolactone structural unit
There is disclosed a magnetic recording medium having the excellent electromagnetic conversion properties and an improved Young's modulus of a magnetic layer, wherein the magnetic layer contains a...
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5134035 |
Magnetic recording medium containing a polyurethane copolymer with a free radically polymerized polymer segment grafted to the polyurethane through a sulfur atom
The invention relates to a sulfonated, thiol, and hydroxy-functional polyurethane polymer which comprises: (i) a polyurethane backbone; (ii) at least one SO 3 M group pendant from the polyurethane...
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5130202 |
Magnetic recording medium containing an isocyanate-free branched thermoplastic polyurethane binder resin with urea groups at the chain ends
Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is applied firmly thereon and is based on a polyurethane binder, not less than 50% by weight of...
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5094916 |
Magnetic recording medium comprising a polyurethane binder resin having a specified glass transition, molecular weight, and polar group content
A magnetic recording medium is disclosed which has a magnetic layer comprising a ferromagnetic powder and a specific polyurethane resin as a binder. The polyurethane resin has a weight average...
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4869965 |
Process for the production of a magnetic recording medium
A magnetic recording carrier which has improved mechanical properties as a result of a highly active cross-linking reaction of the polymeric binder is produced by carrying out the cross-linking...
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4812369 |
Magnetic recording medium
A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a...
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4782130 |
Fluorinated polyurethanes containing polyoxyperfluoro-alkylene blocks, endowed with improved mechanical characteristics
Fluorinated polyurethanes, having improved mechanical characteristics and a glass transition temperature lower than -80° C., containing polyoxyperfluoroalkylene blocks deriving from...
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4775595 |
Magnetic recording medium
In a magnetic recording medium such as VTR tape, a magnetic layer coated on a non-magnetic substrate comprises a binder of polyurethane resin of a reaction products among etheralcohol,...
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4761338 |
Magnetic recording medium
A magnetic recording medium is disclosed which comprises a support and a magnetic recording layer provided on said support, said magnetic recording layer containing a polycarbonate polyurethane...
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4732812 |
Magnetic recording medium
A magnetic medium consisting essentially of a cured compound derived from a low-molecular weight, phosphorylated, polyoxyalkyl polyol and an organic isocyanate compound. The binder may also include...
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4686145 |
Magnetic recording medium, a process for preparing a magnetic recording medium and a binder composition therefor
A novel magnetic recording medium consisting of a base material, magnetic particles and a specific polyurethane-based binder containing incorporated sulphonate groups, a process for preparing such...
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4677030 |
Magnetic storage medium
What is claimed is a magnetic storage medium in which the polyurethane binder system forms a three-dimensional network independently of reactive low molecular weight substances present on the...
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4666784 |
Magnetic recording medium
A magnetic recording medium having a magnetic layer of superior smoothness and excellent abrasion resistance and durability. The magnetic layer contains a polyurethane resin having a metal...
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4643949 |
Magnetic recording tape
Magnetic recording tape comprising a flexible substrate with magnetic particles secured to the substrate by means of a binder comprising a reaction product of a diisocyanate with a blend of a chain...
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4568611 |
Polyester-polyurethane composition and use thereof
A composition containing CrO 2 and a polyester-polyurethane wherein the chain extender contains a mixture of 1,4-butanediol and 1,6-hexanediol; and use thereof, especially in magnetic recording...
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4525424 |
Flexible magnetic recording media having a polyester-polyurethane binder and chromium dioxide pigment
Flexible magnetic recording media having chromium dioxide magnetic particles dispersed in a polyester-polyurethane binder which is a reaction product of (A) a hydroxyl-terminated polyester which...
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4477531 |
Magnetic storage medium
The present invention relates to a magnetic storage medium consisting of a non-magnetic layer support and, applied thereto, a binder-containing magnetic layer, the binder consisting of from 25 to...
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4410440 |
Polyurethane magnetic disk coatings
A polyurethane coating material for magnetic recording disks which is composed of magnetic particles, solvent blends and a thermosetting binder system. The resins are made from blocked isocyanates...
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4405684 |
Rigid magnetic coating composition with thermosetting binder for hard file
A magnetic recording disk coating having a high density of magnetic particles uniformly dispersed in a high performance, thermoset polyurethane resin binder with the dispersion applied as a thin...
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