Fluorochemical containing low adhesion backsize

• US 7,253,241 B2
• Filed: 12/28/2004
• Issued: 08/07/2007
• Est. Priority Date: 12/28/2004
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: DiZio, James P., Moore, George G. I., Kinning, David J.
• Primary Examiner(s): Pezzuto; Helen L
• Application Number:
  US11/027,602
• Publication Number:
  US 20060141246A1
• Time in Patent Office: 952 Days
• Field of Search: 526/242, 526/243, 526/245, 526/248, 526/286, 526/288, 526/318.4, 526/329.3, 526/329.4, 526/342, 526/318.44
• US Class Current: 526/245
• CPC Class Codes: C08F 214/18 Monomers containing fluorine
• CPC Class Codes: C08F 220/1818 C13or longer chain (meth)acrylate, e.g. stearyl (meth)acrylate
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 31/04 Homopolymers or copolymers of vinyl acetate
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 33/16 Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: C08L 33/20 Homopolymers or copolymers of acrylonitrile C08L55/02 takes precedence
• CPC Class Codes: C08L 35/06 Copolymers with vinyl aromatic monomers
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2852 Adhesive compositions

Abstract

In one aspect, the invention provides a water-based release coating composition comprising a mixture of (A.) from about 5 to about 100 wt % of a polymer comprising the reaction product of (a.) from 1 to about 15 wt % of a fluorinated monomer selected from the group consisting of monomers according to the general formula:
R_fX—OC(O)—C(R)═CH₂,
wherein R_f represents a perfluorinated aliphatic group having 3 or 4 carbon atoms, X is an organic divalent linking group, and R represents a hydrogen or methyl group, (b.) from about 40 to about 70 wt % of an alkyl (meth)acrylate, wherein the alkyl group contains from 16 to 22 carbon atoms, (c.) from about 3 to about 20 wt % of (meth)acrylic acid, (d.) from about 20 to about 40 wt % acrylonitrile, and (e.) from 0 to about 15 wt % of vinyl monomer, other than acrylonitrile, wherein the sum of (a.) through (e.) equals 100%; and (B.) from 0 to about 95 wt % of an extender polymer, wherein the sum of (A.) and (B.) is 100% and wt % is based on the total amount of solids in the composition.

Claims

1. A release polymer consisting of the reaction product of

(a) from 1 to about 15 wt % of a fluorinated monomer selected from the group consisting of monomers according to the general formula:

R_f—

X—

OC(O)—

C(R)=CH₂

 

wherein R_f represents a perfluorinated aliphatic group having 3 or 4 carbon atoms, X is an organic divalent linking group, and R represents a hydrogen or methyl group;

(b) from about 40 to about 70 wt % of an alkyl (meth)acrylate, wherein the alkyl group contains from 16 to 22 carbon atoms;

(c)from about 3 to about 20 wt % of (meth)acrylic acid;

(d)from about 20 to about 40 wt % acrylonitrile; and

(e) from 0 to about 15 wt % of vinyl monomer, other than those of(a) through (d).

2. The release polymer according to claim 1 wherein R_r has 4 carbon atoms.

3. The release polymer according to claim 1 wherein X is selected from the group consisting of alkylene, arylene, aralkylene, sulfonyl, sulfoxy, sulfonamide, carbonamido, carbonyloxy, urethanylene, ureylene, and combinations thereof.

4. The release polymer according to claim 1 wherein X is sulfonamidoalkylene.

5. The release polymer according to claim 1 wherein the alkyl (meth)acrylate is selected from the group consisting of octadecyl acrylate, octadecyl methacrylate, behenyl acrylate and combinations thereof.

6. The release polymer according to claim 1 wherein the vinyl monomer is selected from the group consisting of methyl (meth)acrylate, butyl (meth)acrylate, iso-octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, styrene, vinyl acetate, and combinations thereof.

7. The release polymer according to claim 1 wherein the fluorinated monomer is present in an amount of from about 1 to about 10 weight percent.

8. The release polymer according to claim 1 wherein the alkyl(meth)acrylate is present in an amount of from about 45 to about 60 wt %.

9. The release polymer according to claim 1 wherein the (meth)acrylic acid is present in an amount of from about 8 to about 12 wt %.

10. The release polymer according to claim 1 wherein the acrylonitrile is present in an amount of from about 25 to about 35 wt %.