Thermo-responsive water-soluble polymers for viscosity switch

Details Thermo-responsive water-soluble polymers for viscosity switch Thermo-responsive water-soluble polymers for viscosity switch

2005-11-22

2008-08-26

Pezzuto, Helen L. (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S303100, C526S307200, C526S307300, C526S307600, C526S317100

Reexamination Certificate

active

07417101

ABSTRACT:
A thermal responsive, water soluble copolymer is disclosed, which comprises the co-polymerization product of: (a) 0.5˜20 wt % of N-isopropyl acrylamide (NIPAAm); (b) 0.5˜20 wt % of 1-vinyl-2-pyrrolidinone (VPD); (c) 0.01˜10 wt % of acrylic acid (AA); and (d) 80˜90 wt % of acrylamide. The viscosity of.the co-polymerization product is adjustable by temperature. Moreover, phase-separating does not occur in the copolymer while temperature is changing and the structure as well as the fluidity are maintained, therefore, the copolymer of the present invention is suitable for the application of a micro-fluidic chip.

REFERENCES:
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patent: 6372141 (2002-04-01), Okano et al.
patent: 6427378 (2002-08-01), Obonai et al.
patent: 6616946 (2003-09-01), Meier et al.
patent: 6765081 (2004-07-01), Lin et al.

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