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Grafting

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*12/03/2013   
from 4/23/2013

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Grafting

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Patents with Abstracts

5. U.S. Patent 8,586,672 (November 19, 2013), “Method for Increasing Polymer Compatibility,”  Nicolas Dufaure, Francois Genes Tournilhac, Manuel  Hidalgo, and Ludwik Leibler (Arkema France, Colombes, France, and  CNRS, Paris, France).

Mixing incompatible polymers is a problem because of their basic incompatibility.  Dufaure  et al improved compatibility by grafting compatibilizing groups to one or more of the polymers.  The compatibilizing groups include amine, mercaptan, epoxy, isocyanate, anhydride, alcohol or acid groups.  These reactive groups form covalent bonds with a reactive functional group, such as an acid, anhydride, alcohol, mercaptan, amine, epoxy or isocyanate functional groups.  Modification is performed by a modifying agent carrying the appropriate groups for the polymers involved.  Modifying agents are 2-aminoethylimidazolidone (UDETA), 1-(2-[(2-aminoethyl)-amino]ethyl)imidazolidone (UTETA) , 1-(2-[{2-(2-aminoethylamino)ethyl}amino]ethyl)imidazolidone (UTEPA), N-(6-aminohexyl)-N'-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)urea (UPy), 3-amino-1,2,4-triazole (3-ATA) and 4-amino-1,2,4-triazole (4-ATA). UDETA is preferred for use in the present invention.

4. 8,466,072 
Process of localized electrografting onto photosensitive semiconductor substrates
 
Charlier and Palacin; of the Commissariat a l'Energie Atomique et Aux Energies Alternatives, France,  coated an organic film on a selected zone at the surface of a photosensitive semiconductor substrate by (i) bringing a liquid solution which includes at least one organic adhesion primer into contact with at least the selected zone; (ii) polarizing the surface of the substrate to an electric potential more cathodic than the reduction potential of the organic adhesion primer; and (iii) exposing the selected zone to light radiation, the energy of which is at least equal to that of the band gap of the photosensitive semiconductor substrate.

3. 8,356,717 
Hydrophilic porous substrates 

Waller, Jr. and  Weiss of 3M, Minnesota, formed hydrophilic foams by filling a hydrophobic plastic foam with acrylic monomers with extra free-radical polymerizable groups,a photoinitiator  and hydrophilic monomers.  Expose the mixture to electron beam radiation to develop a functionalized surface and use ultraviolet radiation to complete the grafting, forming a hydrophilic foam.  (RDC 1/28/2013)

2. 8,129,469 
Graft copolymer, method for preparing the same and thermoplastic resin composition containing the same
 
O et al of LG Chem, South Korea, developed a graft copolymer based on a 250 to 600 nm composite rubber particle prepared by particle enlargement after mixing a diene rubber polymer (a-1) latex having an average particle diameter of 50-150 nm and a core-shell structured, cross-linked alkyl acrylate rubber polymer (b-1) latex having an average particle diameter of 50-250 nm. A thermoplastic resin composition prepared by mixing the graft copolymer of the present invention with a hard matrix (B) has very superior weathering resistance and superior pigmentation property, gloss, impact resistance and low-temperature impact strength.  (RDC 4/23/2012)

1. 8,129,450 
Articles having a polymer grafted cyclodextrin
 
Wood et al of Cellresin Technologies, Minnesota, Durable developed modified polymer with covalently bonded cyclodextrin. This can be blended with other polymers for films, coatings, nonwoven webs, or monolithic articles. (RDC 4/19/2012)

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Roger D. Corneliussen
Editor
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 4/23/2012.