# US 8,999,495 B2 · Recording material for electrophotographic printing method

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- Number: US 8,999,495 B2
- Document ID: US8999495B2
- Status: Granted
- Kind: B2
- Application number: 13/825,239
- Filed: 2011-09-15
- Published: 2013-08-22
- Granted: 2015-04-07
- Earliest claimed: 2010-09-20
- Assignees: Schoeller Technocell GmbH & Co. KG
- Applicants: Christoph Kozlowski; Andreas Overberg; Rainer Steinbeck
- Inventors: Christoph Kozlowski; Andreas Overberg; Rainer Steinbeck
- Web page: https://patentgrep.com/patent/US8999495B2

## CPC

- G03G 7/004: {obtained by reactions only involving carbon-to-carbon unsaturated bonds}
- B32B 27/08: of synthetic resin
- B32B 27/10: of paper or cardboard
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- C08K 3/22: of metals
- G03G 7/0013: {Inorganic components thereof}
- G03G 7/0046: {obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds}
- Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T 428/24893: including particulate material
- Y10T 428/24934: including paper layer
- Y10T 428/24992: Density or compression of components
- Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T 428/256: Heavy metal or aluminum or compound thereof
- Y10T 428/257: Iron oxide or aluminum oxide
- Y10T 428/259: Silicic material
- Y10T 428/26: Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T 428/31855: Of addition polymer from unsaturated monomers
- Y10T 428/31902: Monoethylenically unsaturated
- Y10T 428/31993: Of paper
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A recording material for electrophotographic printing methods from a base paper coated on both sides with synthetic resin and having a toner-receiving layer arranged on at least one side, containing a water-soluble or water-dispersible binder in the toner-receiving layer, preferably an ethylene-acrylate polymer or an ethylene-acrylate copolymer, a finely particulate inorganic pigment and an antistatic component, such that images using both liquid toners and dry toners can be produced with this recording material, identical in both appearance and haptics to silver halide photographs.

## Claims

### Claim 1

A recording material for electrophotographic printing methods, consisting essentially of a base paper coated with synthetic resin on both sides and at least one toner-receiving layer arranged on a synthetic resin layer, wherein the toner-receiving layer contains a water-soluble or water-dispersible binder, a finely particulate inorganic pigment selected from an oxide of titanium, zinc, tin, antimony or a mixed oxide of two or more of these elements having an average particle size of less than 200 nm and a BET surface area of 30 m2/g to 400 m2/g, and an electrically conductive polymer as an antistatic component.

### Claim 2 (depends on 1)

The recording material according to claim 1, wherein the synthetic resin layers contain polyolefin.

### Claim 3 (depends on 2)

The recording material according to claim 2, wherein the synthetic resin layers contain a mixture of polyethylene with a density of more than 0.95 g/cm3 and a polyethylene with a density of less than 0.95 g/cm3.

### Claim 4 (depends on 3)

The recording material according to claim 3, wherein a polyethylene with a density of >0.95 g/m3 is present in the synthetic resin layers in an amount of 60% by weight to 80% by weight, based on the total polyolefin weight.

### Claim 5 (depends on 1)

The recording material according to claim 1, wherein the toner-receiving layer contains an ethylene-acrylate polymer or ethylene-acrylate copolymer as the water-dispersible binder.

### Claim 6 (depends on 1)

The recording material according to claim 1, wherein the finely particulate pigment is an electrically conductive pigment.

### Claim 7 (depends on 1)

The recording material according to claim 1, wherein the electrically conductive polymer is polystyrene sulfonic acid.

### Claim 8 (depends on 1)

The recording material according to claim 1, wherein the electrically conductive polymer is a polyaniline or a polythiophene.

### Claim 9 (depends on 1)

The recording material according to claim 1, wherein the finely particulate pigment has an average particle size of 10 nm to 2 μm.