# US 11,298,965 B2 · Transfer member for printing systems

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- Number: US 11,298,965 B2
- Document ID: US11298965B2
- Status: Granted
- Kind: B2
- Application number: 17/060,093
- Filed: 2020-10-01
- Published: 2021-01-21
- Granted: 2022-04-12
- Earliest claimed: 2017-11-30
- Assignees: Landa Labs (2012) Ltd.
- Applicants: Landa Labs (2012) Ltd.
- Inventors: Benzion Landa; Sagi Abramovich; Amit Haviv
- Web page: https://patentgrep.com/patent/US11298965B2

## CPC

- B41M 5/025: by transferring ink from the master sheet
- B05B 14/30: comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
- B41J 2/0057: {where an intermediate transfer member receives the ink before transferring it on the printing material}
- B41J 2/447: using arrays of radiation sources (B41J2/475 takes precedence)
- B41J 11/0024: {using conduction means, e.g. by using a heated platen}
- B41M 5/0256: {the transferable ink pattern being obtained by means of a computer driven printer, e.g. an ink jet or laser printer, or by electrographic means}
- B41M 5/03: by pressure
- B41M 5/38221: {Apparatus features}
- B41M 5/52: Macromolecular coatings
- C08G 77/04: Polysiloxanes
- C08K 3/04: Carbon
- C08K 3/36: Silica
- C08K 5/5419: containing at least one Si—C bond
- C08K 5/544: containing nitrogen
- C09C 1/56: Treatment of carbon black {; Purification}
- C09C 3/10: Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)}
- G03G 15/162: {details of the the intermediate support, e.g. chemical composition}
- G03G 15/326: {by application of light, e.g. using a LED array}
- G03G 15/342: {by forming a uniform powder layer and then removing the non-image areas}
- B05B 1/20: Perforated pipes or troughs, e.g. spray booms; Outlet elements therefor
- B05B 13/0207: {the work being an elongated body, e.g. wire or pipe (B05B13/0436, B05B13/0463 take precedence)}
- B05B 13/0228: {the movement of the objects being rotative (B05B13/0242 takes precedence)}
- B41J 2/45: using light-emitting diode {[LED] or laser} arrays
- B41M 2205/06: relating to melt (thermal) mass transfer
- B41M 2205/10: Post-imaging transfer of imaged layer; transfer of the whole imaged layer
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01P 2004/50: Agglomerated particles
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2006/12: Surface area
- C01P 2006/19: Oil-absorption capacity, e.g. DBP values
- C08K 2201/005: Additives being defined by their particle size in general
- C08L 83/04: Polysiloxanes
- C09D 7/66: {characterised by particle size}
- Y02P 70/10: Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

There is disclosed a layered article that can be used in indirect printing, in analog or digital processes. The layered article, when configured as a transfer member, may serve to receive an ink in any form, allow the ink to be treated so as to form an ink image, and permit the application of the ink image on a substrate. The transfer member comprises a support layer and an imaging layer, which may be formed of a silicon matrix including dispersed carbon black particles. Methods for preparing the same are also disclosed.

## Claims

### Claim 1

A method for preparing a layered article, the layered article comprising a functional layer, the method comprising:
a) providing a support layer adapted to form a rear side of the layered article, the rear side being opposite a first side;
b) providing a functional layer, the functional layer including a hydrophobic silicone matrix comprising hydrophilic carbon black particles non-covalently dispersed therein; and
c) bringing into contact the support layer and the functional layer with one another so as to form the layered article, said contacting optionally being in presence of a priming layer and/or an adhesive layer disposed on and/or facing the first side of the support layer;
wherein the hydrophilic carbon black particles have at least one of the following properties:
i) an oxygen content on the surface of the carbon atoms between 1.0 wt. % and 40 wt. %;
ii) a volatile components content between 1.5 wt. % and 50 wt. %;
iii) a surface zeta potential between −70 mV and −15 mV, as measured at a pH of at least 8.0;
iv) a pH between 2.0 and pH 8.5, when measured for an aqueous dispersion of said hydrophilic carbon black particles;
v) a dibutyl phthalate (DBP) absorption value between 50 mL/100 g and 200 mL/100 g;
vi) a specific surface area between 50 m2/g and 650 m2/g, as determined by BET nitrogen absorption;
vii) an ID/IG ratio of at least 0.8, wherein ID and IG represent the peak intensity maxima of D-band and G-band, respectively, as determined by Raman spectroscopy;
viii) an average primary particle size (Dv50) of at most 100 nm;
ix) a predominant secondary particle size (Dv90) of at most 5 μm;
x) a predominant secondary particle size (Dv90) of at most 1000 nm; and
xi) the hydrophilic carbon black particles contain at least one type of functional group selected from the group consisting of epoxy, hydroxy and carboxylic moieties, as detected by Fourier-transform infrared (FTIR) spectroscopy.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the functional layer further comprises a dispersant having at least one carbon-black-affinic moiety, wherein the dispersant satisfies at least one of:
a) having a linear or branched molecule structure, having a backbone and at least one branching unit, and the at least one carbon-black-affinic moiety is disposed within any one of the following:
i. the at least one branching unit, the backbone of the dispersant being a siloxane-based backbone; and
ii. the backbone, at least a portion of said branching units of said dispersant being siloxane-containing branching units; and
b) being selected from the group consisting of an amino-silicone dispersant, an epoxy-silicone dispersant and a silicone-acrylate dispersant.

### Claim 3 (depends on 1)

The method according to claim 1, wherein at least one of any two adjacent layers of the layered article is at least partially cured whilst contacting; the method further comprising fully curing the layered article if a layer thereof is partially uncured.

### Claim 4 (depends on 1)

The method according to claim 1, wherein providing the functional layer includes: A—casting on a carrier a first fluid curable material including the hydrophobic silicone matrix comprising the hydrophilic carbon black particles, so as to form a curable functional layer on the carrier; and B—at least partially curing the curable functional layer.

### Claim 5 (depends on 4)

The method according to claim 4, wherein providing the support layer includes: A—casting a second fluid curable material on a surface of the at least partially cured functional layer opposite the carrier; and B—at least partially curing the curable support layer.

### Claim 6 (depends on 4)

The method according to claim 4, wherein the carrier is planar.

### Claim 7 (depends on 4)

The method according to claim 4, wherein the carrier is non-planar.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the carrier is an inner surface of a centrifugal drum from which the layered article can be peeled away to form a seamless layered article.

### Claim 9 (depends on 1)

The method according to claim 1, wherein providing the support layer includes: A—casting on a carrier a second fluid curable material, so as to form a curable support layer on the carrier; and B—at least partially curing the curable support layer.

### Claim 10 (depends on 9)

The method according to claim 9, wherein the carrier is planar.

### Claim 11 (depends on 9)

The method according to claim 9, wherein providing the functional layer includes: A—casting, on a surface of the at least partially cured support layer opposite the carrier, a first fluid curable material including the hydrophobic silicone matrix comprising the hydrophilic carbon black particles, so as to form a curable functional layer; and B—at least partially curing the curable functional layer.

### Claim 12 (depends on 1)

The method according to claim 1, wherein the hydrophilic carbon black particles of the functional layer provide for at least one of the following properties: mechanical reinforcement, thermal conduction, electrical conduction, radiation absorption and coloration.

### Claim 13 (depends on 1)

The method according to claim 1, wherein said properties include at least one of: a) said ID/IG ratio is at least 0.8; and b) the hydrophilic carbon black particles contain said at least one type of functional group selected from the group consisting of epoxy, hydroxy and carboxylic moieties.

### Claim 14

A layered article comprising a) a support layer; and b) a functional layer, disposed on the support layer, the functional layer comprising a cured hydrophobic silicone matrix comprising hydrophilic carbon black particles non-covalently dispersed therein, wherein:
a) the hydrophobic silicone matrix is formed from functionalized silicone pre-polymers selected from the group consisting of liquid silicone resins (LSR), room temperature vulcanization (RTV) silicones, polydialkyl solioxanes (PDAS), or polydimethyl siloxanes (PDMS) silicones, provided that the silicone pre-polymer is not a fluorosilicone; and
b) the silicone pre-polymers are functionalized by the at least one reactive group selected from the group consisting of amine, vinyl, silane, alkoxy, amide, and acrylate moieties.

### Claim 15 (depends on 14)

The layered article according to claim 14, wherein the cured hydrophobic silicone matrix is an addition cured silicone matrix.

### Claim 16 (depends on 15)

The layered article according to claim 15, wherein the addition cured silicone matrix further includes platinum.

### Claim 17 (depends on 15)

The layered article according to claim 15, wherein the addition cured silicone matrix of the functional layer is a layer formed from polydialkyl siloxanes (PDAS) or polydimethyl siloxanes (PDMS) silicones, functionalized by at least one reactive group selected from the group consisting of vinyl, silane, silanol, alkoxy, and acrylate moieties.

### Claim 18 (depends on 14)

The layered article according to claim 14, wherein the cured hydrophobic silicone matrix of the functional layer is a condensation cured silicon matrix from polydialkyl siloxanes (PDAS) or polydimethyl siloxanes (PDMS) silicones, functionalized by at least one reactive group selected from the group consisting of amine, silane, silanol, and alkoxy moieties.

### Claim 19 (depends on 14)

The layered article according to claim 14, the hydrophilic carbon black particles having at least one of the following properties a) an ID/IG ratio of at least 0.8, wherein ID and IG represent the peak intensity maxima of D-band and G-band, respectively, as determined by Raman spectroscopy; b) an average primary particle size (Dv50) of at most 100 nm; c) a predominant secondary particle size (Dv90) of at most 5 μm; d) a predominant secondary particle size (Dv90) of at most 1000 nm; and e) the hydrophilic carbon black particles contain at least one type of functional group selected from the group consisting of epoxy, hydroxy and carboxylic moieties, as detected by Fourier-transform infrared (FTIR) spectroscopy.

### Claim 20 (depends on 14)

The layered article according to claim 14, wherein the silicone matrix further comprises a dispersant having at least one carbon-black-affinic moiety, wherein the dispersant satisfies at least one of:
a) having a linear or branched molecule structure, having a backbone and at least one branching unit, and the at least one carbon-black-affinic moiety is disposed within any one of the following:
i. the at least one branching unit, the backbone of the dispersant being a siloxane-based backbone; and
ii. the backbone, at least a portion of said branching units of said dispersant being siloxane-containing branching units; and
b) being selected from the group consisting of: an amino-silicone dispersant, an epoxy-silicone dispersant and a silicone-acrylate dispersant.

### Claim 21 (depends on 20)

The layered article according to claim 20, wherein:
(I) the hydrophilic carbon black particles are dispersant laden carbon black particles having at least one of the following properties: a) an ID/IG ratio of at least 0.8, wherein ID and IG represent the peak intensity maxima of D-band and G-band, respectively, as determined by Raman spectroscopy; b) an average primary particle size (Dv50) of at most 100 nm; c) a predominant secondary particle size (Dv90) of at most 5 μm; d) a predominant secondary particle size (Dv90) of at most 1000 nm; and
(II) the functional layer contains at least one type of functional group selected from the group consisting of acrylate, amine, amide, epoxy, hydroxy and carboxylic moieties, as detected by Fourier-transform infrared (FTIR) spectroscopy.

### Claim 22

A layered article comprising: a) a support layer; and b) a functional layer, disposed on the support layer, the functional layer comprising a cured hydrophobic silicone matrix comprising dispersant-laden hydrophilic carbon black particles non-covalently dispersed therein; wherein a dispersant of the dispersant-laden hydrophilic carbon black particles has at least one carbon-black-affinic moiety selected from an amino-moiety, an acrylate-moiety and an epoxy-moiety.

### Claim 23 (depends on 22)

The layered article according to claim 22, wherein the dispersant-laden hydrophilic carbon black particles have at least one of: a) an ID/IG ratio of at least 0.8, wherein ID and IG represent the peak intensity maxima of D-band and G-band, respectively, as determined by Raman spectroscopy; and b) at least one type of functional group selected from the group consisting of epoxy, hydroxy and carboxylic moieties, as detected by Fourier-transform infrared (FTIR) spectroscopy.