Paper and paper laminates containing modified titanium dioxide

• US 8,043,715 B2
• Filed: 06/06/2006
• Issued: 10/25/2011
• 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
• Primary Examiner(s): KILIMAN, LESZEK B
• Application Number:
  US11/447,660
• Publication Number:
  US 20060275597A1
• Time in Patent Office: 1,967 Days
• Field of Search: 428/537.5, 428/407, 428/323, 428/328, 428/403, 428/404
• US Class Current: 428/537.5
• 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 comprising a paper comprising an impregnating resin a cellulose pulp, and a titanium dioxide pigment comprising an amino organosilane on its surface, the titanium dioxide pigment is in an amount of about 45 wt. % or less based on the total dry weight of the paper prior to resin impregnation, wherein the amino organosilane has the general formula (I)

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

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

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

3. The laminate of claim 2, wherein both of R¹ and R² are hydrogen;

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

X is an alkyl group of 1-4 carbon atoms.

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

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

7. The laminate of claim 1, wherein the paper is substantially white.

8. The laminate of claim 1, wherein the paper has a coloration or a design printed thereon.

9. The laminate of claim 1, wherein the titanium dioxide pigment comprising an amino organosilane on its surface, has a substantially monolayer coverage of the amino organosilane on its surface.

4. A laminate comprising a paper comprising an impregnating resin, a cellulose pulp, and a titanium dioxide pigment comprising an amino organosilane on its surface, the titanium dioxide pigment is in an amount of about 45 wt % or less based on the total dry weight of the sheet prior to resin impregnation,

wherein the amino organosilane 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.

10. A composition comprising a, cellulose pulp, and a titanium dioxide pigment comprising an amino organosilane on its surface, the titanium dioxide pigment is in an amount of about 45 wt. % or less of the composition when it is dried wherein the amino organosilane has the general formula (I)

11. A paper comprising a cellulose pulp and a titanium dioxide pigment comprising an amino organosilane on its surface, the titanium dioxide pigment is in an amount of about 45 wt % or less based on the total dry weight of the paper.

12. The paper of claim 11, wherein the amino organosilane has the general formula (I)

13. The paper of claim 12, wherein R¹ and R² are each individually selected from the group consisting of hydrogen and an alkyl group of 1-8 carbon atoms;

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

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

14. The paper of claim 11 further comprising an impregnating resin.

15. The paper of claim 14 wherein the impregnating resin is a thermosetting polymer.

16. The paper of claim 11 wherein the paper is a decorative paper.

17. A laminate comprising the paper of claim 11.

18. A laminate comprising the paper of claim 14.

19. A composition comprising a cellulose pulp and a titanium dioxide pigment, comprising an amino organosilane on its surface, in an amount of about 45 wt % or less of the composition when it is dried.