Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-06-02
1998-04-14
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
521134, 521184, 525417, 525474, C07F28300
Patent
active
057392188
ABSTRACT:
Radially layered copoly-dendrimers having unusual surface properties and novel applications have been synthesized and characterized. These are the first copolymeric dendrimers composed of a hydrophilic poly(amidoamine) (PAMAM) interior with hydrophobic organosilicon surfaces. These dendrimers have been prepared by surface modifications of an ethylene diamine core PAMAM dendrimer with (3-acryloxypropyl)methyldimethoxysilane, (3-acryloxypropyl)bis(vinyldimethylsiloxy)methylsilane, (3-acryloxypropyl)tris(trimethylsiloxy)silane, chloromethyltrimethylsilane, and chloromethyldimethylvinylsilane, to varying degrees of surface coverage. The obtained products were characterized by .sup.1 H, .sup.13 C, and .sup.29 Si NMR, and by DSC and TGA. The dendrimers with less completely covered organosilicon surfaces are water soluble, and have considerable surface activity, the best of which lowered the surface tension of water to less than 30 mN/m. Areas in their surface, according to the Gibbs adsorption isotherm, are surprisingly small, i.e., of the order of 100 .ANG..sup.2 /mol. More completely hydrophobed dendrimers are water insoluble, and form spread monolayers on water, capable of sustaining surface pressures over 40 mN/m. Areas per molecule are in the 1,000 .ANG..sup.2 /mol range.
REFERENCES:
patent: 5387617 (1995-02-01), Hedstrand
patent: 5393795 (1995-02-01), Hedstrand
patent: 5393797 (1995-02-01), Hedstrand
patent: 5560929 (1996-10-01), Hedstrand
I. Gitsov, K. Wooley, C. J. Hawker, P. T. Ivanova and J. M. Frechet, Macromolecules, 26, 5621 (1993).
T. M. Chapman, G. Hillyer, E. J. Mahan and K. A. Shaffer, J. Amer.Chem.Soc., 116, 11195 (1994).
T. M. Chapman and E. J. Mahan, Polymer Preprints, 73, 275 (1995).
E. J. Mahan and T. M. Chapman, Polymer Preprints, 37(2), 247 (1996).
K. Lorenz, R. Mulhaupt, H. Frey, U. Rapp and F. J. Mayer-Posner, Macromolecules, 28, 6657 (1995).
A. W. Adamson, Physical Chemistry of Surfaces, 4th Ed., John Wiley & Sons, New York, 1982, p. 70.
W. Noll, H. Steinbach and C. Sucker, Prog. Colloid Polym. Sci., Hi, 131 (1971).
D. A. Tomalia, "Dendritic Molecules", Sci. Amer., 272, 62-66, 1995.
P.R. Dvornic and D.A. Tomalia, "Molecules that Grow Like Trees. Dendritic Polymers: The Fourth Major Class of Macromolecular Architecture", Science Spectra, 5, 36, (1996).
P.R. Dvornic and D.A. Tomalia, "Dendritic Polymers, Divergent Synthesis (Starburst (R) Polyamidamine Dendrimers)", in The Polymeric Materials Encyclopedia, J.C. Salamone, E.D., CRC Press Inc., Boca Raton, vol. 3, pp. 1814-1830, 1996.
P.R. Dvornic and D.A. Tomalia, "Recent Advances in Dendritic Polymers", Current Opinion in Colloid and Interface Science, 1(2), 221, (1996).
P.R. Dvornic, "Some Recent Advances in the Silicon Containing Polymers", Materials Science Forum, vol. 214, pp. 131-138, (1996).
deLeuze-Jallouli Agnes M.
Dvornic Petar R.
Owen Michael James
Perz Susan Victoria
Swanson Douglas
DeCesare James L.
Dow Corning Corporation
Foelak Morton
Michigan Molecular Institute
LandOfFree
Radially layered copoly (amidoamine-organosilicon) dendrimers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radially layered copoly (amidoamine-organosilicon) dendrimers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radially layered copoly (amidoamine-organosilicon) dendrimers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-635446