Methacrylate half esters

Chem. Descrip. Aromatic acid methacrylate half ester in 2-methoxy propanol solv. with 1040 ppm MEFIQ... 

Chem. Descrip. Aromatic acid methacrylate half ester in PM alcohol/EEP ester solv. with 950 ppm MEFIQ inhibitor Uses Qligomer for coatings (metal, plastics), electronics (photoresists, solder masks), and wood inks... 

Chem. Descrip. Aromatic acid methacrylate half ester In SR 454 (ethoxylated trimethylolpropane triacrylate) with 1190 ppm MEFIQ Uses Used in coatings (metal, paper, plastic, wood), inks (flexo and gravure, screen)... 

Copolymerization with Vinyl Carboxylic Acids. The acids usually suggested for this method include maleic and fumaric acids and their half esters, crotonic, itaconic, methacrylic, and acrylic acid. The latter three appear to be most generally preferred. On occasion, the amides of these acids are suggested for achieving the same end result (24). Suggested specifically for butadiene-styrene latexes are these acids at about 0.05-10 wt. % based on total monomer. The latex should be adjusted to pH 8-11 (28, 29). For copolymerization with vinyl acetate (2) and acrylic monomers (18) identical acid monomers are suggested. Use of such latexes is claimed to give F/T stable emulsion floor polishes (25) and paints (16). 

Very few studies have considered the behavior of ionomers in relatively polar solvents, i.e., solvents with high dielectric constants, e. Schade and Gartner(8) compared the solution behavior of ionomers derived from copolymers of styrene with acrylic acid, methacrylic acid, or half esters of maleic anhydride in tetra-hydrofuran (THF), a relatively non-polar solvent (e 7.6), and dimethyl formamide (DMF), a polar solvent (e = 36.7). They ob-... 

The reaction of 2-hydroxyethyl methacrylate and acid anhydrides produces the half esters.In one case the half ester was used directly in anaerobic compositions. In another examplethe acid functionality was neutralized with metal hydroxides [e.g., Zn(OH)2 and Ca(OH)2] in an anaerobic composition. These compositions have been described as easing the bonding of oily surfaces. The neutralized monomers have also been claimed to function as rust preventatives. 

If an analogy with methacrylate is valid, one expects the n-butyl ester of itaconic acid to be less sensitive than the methyl ester. Reported values for poly(n-butyl methacrylate) are about half those for PMMA (9). In the present work, PDnBI indeed shows little advantage over PMMA (Figure 3). The ratio of G(s) for the n-butyl ester of itaconic acid to that for the methyl ester was found to be approximately the same as the ratio reported for the corresponding methacrylate esters. 

Kato et al. (92) irradiated polymethylmethacrylate at -196° C under vacuum, and the spectrum shown in Fig. 16 was obtained. This spectrum was identified as due to the free radicals, COOCH3, CHO, and -CH3, which show the singlet, doublet and quartet, respectively. The half-life of methyl radicals at — 196° C was about 5 hr. It is likely that the methyl radicals are produced by the photolysis of ester side groups, just as ethyl radicals are produced after irradiation of polyethyl-methacrylate at —196° C. 

The majority of commercial methacrylic ester polymers are produced by free-radical initiators. Peroxides and azo compounds ftinction as t5ipical initiators for this type of polymerization. Other possible routes for producing methacrylic polymers with radicals include photoinitiation and radiation-induced polymerization. Both Y ray and electron-beam radiation have been employed in the production of methacrylic ester polymers (36-38). At constant temperature, there is a first-order dependence of the polymerization rate on monomer concentration and a one-half-order dependence on initiator concentration. Rate data for the polymerization of various methacrylic monomers using the azo compoimd 2,2 -azobisisobut5ironitrile [78-67-1] (AIBN) are shown in Table 8. 

Poly(meth)acrylates is an important group of industrial products, which have found various applications in many fields such as construction materials, coatings, and adhesives. [1] For example, in the United States nearly one million tons of polymeric products based on acrylic and methacrylic esters are produced each year and the acrylates and methacrylates account for about evenly half. [2] A substantial fraction of the methacrylate products are copolymers, which contain various combinations of methacrylate and/or acrylate monomers. The trade names for acrylate and methacrylate polymeric products include Acrylite, Dicalite, Lucite, Plexiglas, and Rhoplex. 

Around half of the produced butanol is used as butyl acrylate and methacrylate esters, for latex surface coating, enamels and lacquers (Kirschner 2006). Further significant derivatives of butanol are butyl glycol ether (a solvent and surfactant in many domestic and industrial products), butyl acetate (solvent in the production of lacquers) and plasticisers. Butanol is also an excellent thinner for brake fluids and solvent used in the production of antibiotics, vitamins and hormones (Lee et al. 2008). 

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