FLUOROACRYLATE-MERCAPTOFUNCTIONAL COPOLYMERS

• US 20080071021A1
• Filed: 09/21/2007
• Published: 03/20/2008
• 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: Kumar, Ramesh, Clark, John, Qiu, Zai-Ming
• Granted Patent: US 7,666,964 B2
• Time in Patent Office: Days
• US Class Current: 524/537
• 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;

R=H 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,

q=1 to 8,

A=an unbranched symmetric alkylene group, arylene group, or aralkylene group,

p=2 to 30, and

R′

=H, CH₃, or F.

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

CH₂.