Surface layer

Patent metadata

Field	Value
Publication number	US-9334335-B2
Application number	US-201213690415-A
Country	US
Kind code	B2
Filing date	Nov 30, 2012
Priority date	Nov 30, 2012
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

There is described a surface layer or coating of a fluoropolymer. Dispersed in the fluoropolymer is a compound of the formula:

wherein R 1 , R 2 , R 3 , and R 4 each, independently of the others, are —H, alkyl, aryl, arylalkyl, or alkylaryl, R is a group of the formula —COOH, —COOM, —R 5 —COOH, —R 5 —COOM, —X—R 5 —COOH, or —X—R 5 —COOM wherein X and R 5 are as defined herein, M is a cationic metal, A represents a saccharide monomer repeating unit having one or more R groups, B represents a saccharide monomer repeating unit having no R groups, m is an integer representing the number of repeating A units, and n is an integer representing the number of repeating B units.

First claim

What is claimed is:

1. A surface layer comprising (a) a fluoropolymer and (b) a modified cellulose of the formula

wherein the structure:

is represented by:

R is a group of the formula —COOH, —COOM, —R 5 —COOH, —R 5 —COOM, —X—R 5 —COOH, or —X—R 5 —COOM, wherein:
(A) R 5 is a first moiety selected from the group consisting of alkylene, arylene, arylalkylene, and alkylarylene, including substituted and unsubstituted first moieties, wherein hetero atoms either may or may not be present in the first moiety;
(B) M is a cationic metal;
(C) X is:
(i) —O—;
(ii) —S—;
(iii) a group of the formula —NR 6 R 7 —; wherein R 6 and R 7 each, independently of the other are:
(a) —H; or
(b) a second moiety selected from the group consisting of alkyl, aryl, arylalkyl, and alkylaryl, including substituted and unsubstituted second moieties, wherein hetero atoms either may or may not be present in the second moiety;

(iv) a group of the formula

(v) a group of the formula

or
(vi) a group of the formula

A represents a saccharide monomer repeating unit having one or more R groups;
B represents a saccharide monomer repeating unit having no R groups;
m is an integer representing the number of repeating A units; and
n is an integer representing the number of repeating B units;
wherein modified cellulose comprises from about 0.1 weight percent to about 25 weight percent of the surface layer.

2. The surface layer of claim 1 , wherein the modified cellulose comprises from about 1 to about 5 weight percent of the surface layer.

3. The surface layer of claim 1 , wherein the fluoropolymer comprises a fluoroelastomer selected from the group consisting of a) copolymers of two of vinylidenefluoride, hexafluoropropylene, and tetrafluoroethylene; b) terpolymers of vinylidenefluoride, hexafluoropropylene, and tetrafluoroethylene; and c) tetrapolymers of vinylidenefluoride, hexafluoropropylene, tetrafluoroethylene, and a cure site monomer.

4. The surface layer of claim 1 , wherein the fluoropolymer comprises a fluoroplastic selected from the group consisting of polytetrafluoroethylene (PTFE); perfluoroalkoxy polymer resin (PFA); copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP); copolymers of hexafluoropropylene (HFP) and vinylidene fluoride (VDF or VF2); terpolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VDF), and hexafluoropropylene (HFP); and tetrapolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VF2), hexafluoropropylene (HFP) and a cure site monomer.

5. The surface layer of claim 1 , wherein the surface layer further comprises fillers selected from the group consisting of glass flake, glass bead, glass fiber, aluminum silicate, zirconium silicate, mica, metal flake, metal fiber, fine ceramic powders, silicon dioxide, barium sulfate, talc and pigment.

6. A fuser member comprising:
a substrate;
a functional layer disposed on the substrate; and
a surface layer according to claim 1 disposed on the functional layer.

7. The fuser member of claim 6 wherein the surface layer comprises a thickness of about 10 microns to about 100 microns.

8. A surface coating comprising a fluoropolymer having dispersed therein a compound of the formula:

wherein the structure

is represented by:

R is a group of the formula —COOH, —COOM, —R 5 —COOH, —R 5 —COOM, —X—R 5 —COOH, or —X—R 5 —COOM wherein R 5 is a first substituent selected from the group consisting of alkylene, arylene, arylalkene, alkyl aryl, X is:
(i) —O—;
(ii) —S—;
(iii) a group of the formula —NR 6 R 7 —; wherein R 6 and R 7 each, independently of the other are—H; a second substitutent selected from the group consisting of alkyl, aryl, arylalkyl, alkylaryl, including substituted and unsubstituted second substituent, wherein hetero atoms either may or may not be present in second susbstituent;
(iv) a group of the formula

(v) a group of the formula

 or
(vi) a group of the formula

M is a cationic metal, A represents a saccharide monomer repeating unit having one or more R groups, B represents a saccharide monomer repeating unit having no R groups, m is an integer representing the number of repeating A units, and n is an integer representing the number of repeating B units.

9. The surface coating of claim 8 , wherein the compound comprises from about 0.1 weight percent to about 25 weight percent of the surface coating.

10. The surface coating of claim 8 , wherein the fluoropolymer comprises a fluoroelastomer selected from the group consisting of a) copolymers of two of vinylidenefluoride, hexafluoropropylene, and tetrafluoroethylene; b) terpolymers of vinylidenefluoride, hexafluoropropylene, and tetrafluoroethylene; and c) tetrapolymers of vinylidenefluoride, hexafluoropropylene, tetrafluoroethylene, and a cure site monomer.

11. The surface coating of claim 8 , wherein the fluoropolymer comprises a fluoroplastic selected from the group consisting of polytetrafluoroethylene (PTFE); perfluoroalkoxy polymer resin (PFA); copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP); copolymers of hexafluoropropylene (HFP) and vinylidene fluoride (VDF or VF2); terpolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VDF), and hexafluoropropylene (HFP); and tetrapolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VF2), hexafluoropropylene (HFP) and a cure site monomer.

12. The surface coating of claim 8 , wherein the surface coating further comprises fillers selected from the group consisting of glass flake, glass bead, glass fiber, aluminum silicate, zirconium silicate, mica, metal flake, metal fiber, fine ceramic powders, silicon dioxide, barium sulfate, talc and pigment.

13. A fuser member comprising:
a substrate;
a functional layer disposed on the substrate; and
an outer layer disposed on the functional layer wherein the outer layer comprises a fluoropolymer having dispersed therein a compound of the formula:

wherein the structure:

is represented by:

Assignees

• Xerox Corp

Inventors

• Birau Mihaela M
• Toosi Salma F
• Abraham Biby E
• Wagner Christopher A
• Allen C Geoffrey
• Odell Peter G
• Vanbesien Daryl W
• Moorlag Carolyn P

Classifications

• Y10T428/263

  Coating layer not in excess of 5 mils thick or equivalent · CPC title

• C08B15/06 Primary

  containing nitrogen {, e.g. carbamates} · CPC title

• Y10T428/3154

  Of fluorinated addition polymer from unsaturated monomers · CPC title

• C09D101/08

  Cellulose derivatives · CPC title