Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2011-01-11
2011-01-11
Mullis, Jeffrey C (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S245000, C525S256000, C525S299000, C525S302000, C525S309000, C210S500270, C210S500350, C210S500420
Reexamination Certificate
active
07868087
ABSTRACT:
The present invention relates to synthetic methods for grafting hydrophilic chains onto polymers, particularly hydrophobic polymers such as poly(vinyl chloride) (PVC), poly(vinylidene fluoride) (PVDF), and chlorinated polypropylene (cPP). Resulting polymers include comb polymers which can have a microphase-separated structure of hydrophilic domains provided by the hydrophilic chains. Articles prepared from these comb polymers, particularly derived from PVDF, include membranes for water filtration in which the hydrophilic domains provide a pathway for water transport. PVC can be plasticized by grafting the PVC with hydrophilic chains. In addition, such articles, particularly articles having biomedical applications, can display anti-thrombogenic properties.
REFERENCES:
patent: 3901810 (1975-08-01), Brooks et al.
patent: 4377010 (1983-03-01), Fydelor et al.
patent: 4752624 (1988-06-01), Kim et al.
patent: 4861830 (1989-08-01), Ward, Jr.
patent: 4886836 (1989-12-01), Gsell et al.
patent: 5028332 (1991-07-01), Ohnishi
patent: 5066401 (1991-11-01), Muller et al.
patent: 5190989 (1993-03-01), Himori
patent: 5470892 (1995-11-01), Gupta et al.
patent: 6207749 (2001-03-01), Mayes et al.
patent: 6413621 (2002-07-01), Mayes et al.
patent: 6509098 (2003-01-01), Merrill et al.
patent: 2002/0155311 (2002-10-01), Mayes et al.
patent: 61007961 (1987-07-01), None
patent: WO 98/08595 (1998-03-01), None
patent: WO 98/08595 (1998-03-01), None
patent: WO 99/52560 (1999-10-01), None
patent: WO 99/54365 (1999-10-01), None
patent: WO 02/022712 (2002-03-01), None
patent: WO 02/022712 (2002-03-01), None
Beers et al., “The synthesis of densely grafted copolymers by atom transfer radical polymerization,” Macromolecules, vol. 31, No. 26, pp. 9413-9415, 1998.
Beihoffer et al., “Hydrophilic modification of engineering polymers,” Polymer, vol. 27, pp. 1626-1632, Polymer, Oct. 1986.
Dasgupta, “Surface modification of polyolefins for hydrophilicity and bondability: ozonization and grafting hydrophilic monomers on ozonized polyolefins”, Journal of Applied Polymer Science, vols. 41, pp. 233-248, 1990.
Downes et al., “Modifications of the hydrophilicity of heterocyclic methacrylate copolymers for protein release”, Biomaterials, vol. 16, No. 18, pp. 1417-1421, 1995.
Hester et al., “Preparation of protein-resistant surfaces on poly(vinylidene fluoride) membranes via surface segregation”, Macromolecules, vol. 32, pp. 1643-1650, 1999.
Hopkinson, et al., Isotopic labelling and composition dependence of interaction parameters in polyethylene oxide/polymethyl methacrylate blends,Polymer, vol. 36, No. 18, pp. 3523-3531, 1995.
Israelachvili, Jacob N., et al. “Contact Angles on Chemically Heterogeneous Surfaces,”Langmuir, vol. 5, p. 288-289, 1989.
Israels et al., “pH-controlled gating in polymer brushes”, Macromolecules, vol. 27, pp. 6679-6682, 1994.
Ito et al., “pH-sensitive gating by conformational change of a polypeptide brush grafted onto a porous polymer membrane”, J.Am. Chem. Soc., 1619-1623, 1997.
Kim, C. K., et al., The Changes of Membrane Performance with Polyamide Molecular Structure in the Reverse Osmosis Process,J. Memb. Sci., vol. 165, p. 189-199, 2000.
Mika et al., “A new class of polyelectrolyte-filled microfiltration membranes with environmentally controlled porosity”, Journal of Membrane Science, vol. 108, pp. 37-56, 1995.
Nunes, Suzana Pereira, et al., “Dense Hydrophilic Composite Membranes for Ultrafiltration,”J. Memb. Sci., vol. 106, p. 49-56, 1995.
Paik, Hyun-Jong, et al., Synthesis and Characterization of Graft Copolymers of Poly(vinyl chloride) with Styrene and (Meth)acrylates by Atom Transfer Radical Polymerization,Macromol. Rapid Comm., vol. 19, p. 47-52, 1988.
Walton et al., “Entropically driven segregation in blends of branced and linear polymers”, Physical Review Letters, vol. 54, No. 3, pp. 2811-2815, Sep. 1996.
Wang et al., “Synthesis of EPDM-g-PMMA through atom transfer radical polymerization,” Polymer, vol. 40, pp. 4515-4520, 1999.
Akthakul Ariya
Banerjee Pallab
Hester Jonathan F.
Mayes Anne M.
Massachusetts Institute of Technology
Mullis Jeffrey C
Wolf Greenfield & Sacks P.C.
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