Graft copolymer coating

Cloud point 52, 53 Coagulum 47, 53 Coating, graft copolymers 32 Competitive growth experiment 49 Crq)oly(styrene-dimethylacrylamide) 19 Cumyloxy free radicals 71 Cyanoisopixqtyl free mono-madicals 88, 94-96... 

The properties of alkyds have a subsUintial effect on the weather resistance of coatings. Graft-copolymers of castor oil alkyd with methyl and butyl methacrylate substantially reduce the drying rate, improve the weather resistance and mechanical properties of coatings [112]. 

As the separation of lymphocyte subpopulations based on the expression of immunoglobulin (Ig) molecules on their plasma membrane surfaces is of considerable practical interest at the present time (13), we have applied polyamine graft copolymers as solid-phase matrices for the separation of IgG-positive (IgG" ") and -negative (IgG ) lymphocytes. The solid-phase matrix was prepared by coating graft copolymers on glass beads of 48 - 60 mesh by solvent evaporation techniques. 

Solution polymers are the second most important use for acryflc monomers, accounting for about 12% of the monomer consumption. The major end use for these polymers is in coatings, primarily industrial finishes. Other uses of acryflc monomers include graft copolymers, suspension polymers, and radiation curable inks and coatings. 

Copolymers of diallyl dimethyl ammonium chloride [7398-69-8] with acrylamide have been used in electroconductive coatings (155). Copolymers with acrylamide made in activated aqueous persulfate solution have flocculating activity increasing with molecular weight (156). DADM ammonium chloride can be grafted with cellulose from concentrated aqueous solution catalysis is by ammonium persulfate (157). Diallyl didodecylammonium bromide [96499-24-0] has been used for preparation of polymerized vesicles (158). 

A waterborne system for container coatings was developed based on a graft copolymerization of an advanced epoxy resin and an acryHc (52). The acryhc-vinyl monomers are grafted onto preformed epoxy resins in the presence of a free-radical initiator grafting occurs mainly at the methylene group of the aHphatic backbone on the epoxy resin. The polymeric product is a mixture of methacrylic acid—styrene copolymer, soHd epoxy resin, and graft copolymer of the unsaturated monomers onto the epoxy resin backbone. It is dispersible in water upon neutralization with an amine before cure with an amino—formaldehyde resin. 

Ishihara [173] also synthesized poly (M PC-gro/i-BMA). This graft copolymer could be dissolved in ethanol and was useful as a non-thrombogenic coating material. 

Needless to say, the best established architecture which can be designed by the macromonomer technique has been that of graft copolymers. With this technique we now have easy access to a variety of multiphased or microphase-separated copolymer systems. This expanded their applications into a wide area including polymer alloys, surface modification, membranes, coatings, etc. [5]. 

Graft copolymers of thinned, gelatinized starch, including hydroxyethyl starch, with 1,3-butadiene-styrene latexes and other polymers that are claimed to have useful properties as paper coating materials are presented in Chapter 17. 

Watanabe62) studied systematically the copolymerization of ra-methacryloyl-polyoxyethylenes, with monomers such as acrylonitrile, styrene, butyl methacrylate, and methacrylic acid. It should be mentioned that the macromonomers that he prepared are very short so that no difficulties were encountered to isolate the graft copolymers formed. There are many applications for these graft copolymers, e.g. as additives in polyacrylonitrile films and fibers they cause improved antistatic properties. They have been tested as varnishes, coatings, and wood dimensional stabilization agents. 

Even in polymer chemistry these species may be of interest since more and more attention is devoted to polymerization in confined volumes, such as micelles, whereby the graft copolymer could first help in the emulsion polymerization of a monomer compatible with the backbone and subsequently act as a surface modifier of the polymer formed (wetting agent, pigment binder, coating binder, antistatic compound, adhesion factor, etc.). 

The PVA-PEG graft copolymer Kollicoat IR is the new instant-release, aqueous coating polymer from BASF. Due to its low viscosity and excellent mechanical properties, it permits solid content of up to 30% and leads to fine and smooth tablet film coatings. 

On the whole, the miniemulsion polymerization process proved to be effective for incorporating an alkyd resin into acrylic coated copolymers. The reaction produced stable, small particle size latexes that contain graft copolymer of the acrylic and alkyd components. Attempts at macroemulsion hybrid polymerization were unsuccessful. 

Emulsion polymerization has become an important process for the production of a large number of industrial polymers in the form of polymer colloids or latexes. They are the base of adhesives, paints and especially of waterborne coatings. An interest has been developed in recent years in emulsion polymerization systems in which the classical low molecular weight surfactaints are replaced by polymeric surfactants, either hydrophilic-hydrophobic block and graft copolymers (1-4) or functionalized oligomers (5). 

Fig. 3. Fluorescence leftpanel) and phase contrast (rightpanel) photomicrographs of EJ bladder carcinoma cells, following exposure to pFI-sensitive liposomes (f 00 p g/ml total lipid) at 37°C for f h. Noncoafed DOPE CHEMs liposomes (top), DDP(EO)g2-coated liposomes (middiri), (DDGG) jEO), -coafed liposomes (bottom). Copolymer content in the formulations is 5 mol%. The homogenous cytosol fluorescence observed in all images shows fhaf the grafted copolymers do not compromise with the cellular internalization of liposomes. (Reproduced from ref. 38 wifh permission from Elsevier)...

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