Paper and paper laminates containing modified titanium dioxide

• US 20060275597A1
• Filed: 06/06/2006
• Published: 12/07/2006
• Est. Priority Date: 06/07/2005
• Status: Active Grant

• Current Assignee: The Chemours Company FC, LLC (The Chemours Company)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Thiele, Erik Shepard
• Granted Patent: US 8,043,715 B2
• Time in Patent Office: Days
• US Class Current: 428/323
• CPC Class Codes: B32B 29/00 Layered products comprising a layer of paper or cardboard
• CPC Class Codes: B32B 29/06 specially treated, e.g. surfaced, parchmentised
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01P 2004/62 Submicrometer sized, i.e. from 0.1-1 micrometer
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C01P 2006/10 Solid density
• CPC Class Codes: C09C 1/3684 Treatment with organo-silicon compounds
• CPC Class Codes: D21H 17/13 Silicon-containing compounds
• CPC Class Codes: D21H 17/59 obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon
• CPC Class Codes: D21H 17/675 Oxides, hydroxides or carbonates
• CPC Class Codes: D21H 17/69 modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
• CPC Class Codes: D21H 27/24 characterised by the surface to be covered being phenolic-resin paper laminates, vulcan fibre or similar cellulosic fibreboards
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2993 Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

The present invention pertains to a laminate paper and a paper laminate made from such paper. More specifically, the laminate paper contains an amino organosilane surface-modified titanium dioxide pigment.

Claims

1. A laminate paper comprising a resin-impregnated, opaque, cellulose pulp-based sheet containing a titanium dioxide pigment component in an amount of about 45 wt % or less (based on the total dry weight of the sheet prior to resin impregnation), wherein the titanium dioxide pigment component comprises an amino organosilane surface-modified titanium dioxide pigment.

2. The laminate paper of claim 1, wherein the titanium dioxide pigment has a substantially monolayer coverage of the amino organosilane on the surface.

3. The laminate paper of claim 1, wherein the amino organosilane has the general formula (I)

4. The laminate paper of claim 3, wherein R¹ and R² are each individually selected from the group consisting of hydrogen and an alkyl group of 1-8 carbon atoms;

and/or R³, R⁴ and R⁵ are each individually selected from the group consisting of hydrogen and an alkyl group of 1-8 carbon atoms; and

/or X is an alkyl group of 1-8 carbon atoms.

5. The laminate paper of claim 4, wherein both of R¹ and R² are hydrogen;

and/or R³, R⁴ and R⁵ are each individually selected from an alkyl group of 1-4 carbon atoms; and

/or X is an alkyl group of 14 carbon atoms.

6. The laminate paper of claim 1, wherein the amino organolsilane is selected from the group consisting of aminoethyl trimethoxysilane, aminoethyl triethoxysilane, aminopropyl trimethoxysilane, aminopropyl triethoxysilane, methylaminopropyl trimethoxysilane, ethylaminopropyl trimethoxysilane, aminopropyl tripropoxysilane, aminoisobutyl trimethoxysilane, and aminobutyl triethoxysilane.

7. The laminate paper of claim 1, wherein the amino organosilane is aminopropyl triethoxysilane.

8. The laminate paper of claim 1, wherein the titanium dioxide pigment is a phosphated metal oxide coated titanium dioxide pigment.

9. The laminate paper of claim 1, which is substantially white.

10. The laminate paper of claim 1, which has a coloration and/or design printed thereon.

11. A paper laminate comprising a substantially unitary consolidated structure containing a plurality of layers, wherein at least one of the layers is derived from a laminate paper as set forth in any one of claims 1-10.