Patent ID: 6750305
Filing Date: 2004-06-15
Classification: C08F

Abstract:
Alkyl acrylate and/or methacrylate/N-vinylpyrrolidone copolymers with a mass average molecular weight Mw in the range of 5000 to 50000, wherein the acrylate and/or methacrylate monomer moieties that participate in the polymer chain are: where R is H or CH3, Ri are residues of saturated linear aliphatic alcohols Riâ€”OH where i represents the number of carbon atoms of said residues and is in the range 10 to 50 carbon atoms, and which have the characteristic of following a distribution law that is the superimposition of a â€œUâ€  distribution law, where numbers i are even numbers developed over the high 24-50 portion of the interval, wherein the centered value is Iu, and a â€œnon-Uâ€  distribution law where numbers i are even or odd numbers developed over the low portion 10-22 of the interval and wherein the centred value inu is such that inuu, the weight ratio of the ensemble of moieties with formula: distributed in accordance with the â€œUâ€  distribution law to the ensemble of moieties distributed in accordance with the â€œnon-Uâ€  law being 1:99 to 50:50.