Perfluoroether based polymers

Details Perfluoroether based polymers Perfluoroether based polymers

2006-11-13

2008-12-30

Mulcahy, Peter D. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C427S372200, C428S423100, C526S242000, C526S243000, C526S248000, C528S030000

Reexamination Certificate

active

07470745

ABSTRACT:
A composition which provides surface effects to substrates comprising a polymer containing at least one urea linkage prepared by(i) reacting (1) at least one organic diioscyanate, polyisocyanate, or mixture thereof, and (2) at least one fluorochemical compound of Formula Iin-line-formulae description="In-line Formulae" end="lead"?Rf—O(CF2CF2)r(CH2CH2)q(R1)sXH  Formula (I)in-line-formulae description="In-line Formulae" end="tail"?whereinRfis a linear or branched C1to C7perfluoroalkyl optionally interrupted by one to three oxygen atoms,r is 1 to 3, q is 1 to 3, s is 0 or 1,X is O, S, or NR2wherein R2is H, or C1to C6alkyl, andR1is a divalent radical selected from —S(CH2)n—,p is 1 to 50, and R3, R4and R5are each independently H or C1to C6alkyl;(ii) and then reacting with (3) water, a linking agent, or a mixture thereof.

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