Fluoroacrylate-mercaptofunctional copolymers

• US 7,666,964 B2
• Filed: 09/21/2007
• Issued: 02/23/2010
• Est. Priority Date: 12/28/2004
• Status: Expired due to Fees

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Qiu, Zai-Ming, Kumar, Ramesh C., Clark, John C.
• Primary Examiner(s): Wu; David
• Assistant Examiner(s): BERNSHTEYN, MICHAEL
• Application Number:
  US11/859,295
• Publication Number:
  US 20080071021A1
• Time in Patent Office: 886 Days
• Field of Search: 526/243, 526/286, 526/319, 528/70, 528/78, 528/79, 524/544, 560/165
• US Class Current: 526/243
• CPC Class Codes: C08F 220/38 Esters containing sulfur
• CPC Class Codes: C08F 220/387 and containing nitrogen and oxygen

Abstract

A copolymer comprises repeating units derived from at least one co-reactant comprising two or more mercapto functional groups, and repeating units derived from a fluoroacrylate comprising the reaction product of:

• • (a) at least one fluorochemical alcohol represented by the formula:
    C₄F₉—X—OH
  • wherein:

• • • R=hydrogen or an alkyl group of 1 to 4 carbon atoms,
    • m=2 to 8,
    • R_f=C_nF_2n+1,
    • n=1 to 5,
    • y=0 to 6, and
    • q=1 to 8;
  • (b) at least one unbranched symmetric diisocyanate; and
  • (c) at least one hydroxy-terminated alkyl (meth)acrylate or 2-fluoroacrylate monomer having 2 to about 30 carbon atoms in its alkylene portion.

Claims

1. A copolymer comprising repeating units derived from at least one co-reactant comprising two or more mercapto functional groups, and repeating units from a fluoroacrylate represented by the formula:

C₄F₉—

X—

OC(O)NH—

A—

HNC(O)O—

(C_pH_2p)(O)COC(R′

)═

CH₂

wherein;

2. The copolymer of claim 1 wherein the fluoroacrylate is C₄F₉SO₂N(CH₃)C₂H₄OC(O)NHC₆H₄CH₂C₆H₄NHCOOCH₂CH₂OC(O)CH═

CH₂.