Acrylic Compositions

Methacrylate/acrylate latex IPNs were synthesized by a modified emulsion polymerization technique.To 250 ml deionized, deaerated, stirred water at 60 C, 50 ml 10% (w/v) lauryl sodium sulfate solution was added, followed by 5 ml 5% (w/v) potassium persulfate solution. The calculated quantity of monomer I containing 0.4% tetraethylene glycol dimethacrylate (TEGDM) as a crosslinking agent was added at a rate of approximately 2 ml/min. When the first monomer was completely added, a minimum time of 1 hr was allowed for completion of the polymerization. Then a second 5 ml of the potassium persulfate solution was added followed by monomer II, which also contained 0.4% TEGDM. The same reaction conditions as above were followed. The combined amounts of networks I and II were 30% solids in the final latex. This method is referred to as the dropwise addition method. 

When bulk addition of monomer was used, the procedure was to add all the monomer plus crosslinking agent to the flask before adding the potassium persulfate free-radical source. Although temperature control was more difficult, the maximum deviation in temperature from 60 C was usually 2°C. 

Another typical IPN pair was poly(ethyl methacrylate) for polymer I, and poly(n-butyl acrylate) for polymer II. However, all acrylic monomers, styrene, and other latex-forming monomers may be employed. If polymer II 

Very recently, Sionakidis et prepared a poly(vinyl 

The latex IPNs were synthesized by a two-stage emulsion polymerization technique. The first stage consisted of making a seed latex of crosslinked PVC polymer I and then introducing the monomer II mixture of butadiene and acrylonitrile and crosslinker followed by a second polymerization. The recipe for the seed latex was as follows  

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Simple one-part acrylic compositions containing 9-borabicyclo-[3,3,l]-nonane (often called 9-BBN) cure and give good adhesion to wood [90], It has also been used to cure a reactive acrylic hot-melt [91] (Scheme 11). 

To study the effects of composition on the photopolymerization behavior of acrylates, the group of Bowman et al. prepared gradient libraries where acrylate composition was varied in one dimension and light exposure was varied using a moveable shutter in the orthogonal direction [17-21]. An FTIR microscope was used to characterize the conversion across the samples and the data from multiple libraries was then used to derive kinetic models for the photopolymerization. 

Title Polybutadiene (Meth)Acrylate Composition and Method... 

These are redispersible powders of 100% acrylic composition and are readily redispersible in water. They are manufactured by spray drying of the appropriate latex. Addition of some inorganic fillers prevents the caking of these powders. 

Nippon Exlan Espec Acryl fiber/sodium acrylate composite fiber... 

Defoort B., Lopitaux G., Dupillier J.M., Larnac G., Coqueret X., Electron-beam initiated polymerization of acrylate compositions, 6 Influence of processing parameters on the curing kinetics of an epoxy acrylate blend, Macromol. Chem. Phys., 2001,202,3149-3156. 

Figure 12. Dependence of effective electrophoretic mobility on poly (acryleunide-co-acrylate) composition.

Acrylated oligomers can be divided into three main classes polyester acrylates, epoxy acrylates, and urethane acrylates. Urethane acrylates are an especially important commercial class of oligomers. Applications Include binders for magnetic media, vehicles for inks, and coatings for vinyl floor tiles, optical fibers, and paper. Each application has certain performance requirements that must be met by the urethane oligomer. This paper will discuss the effect of urethane acrylate composition on end properties. 

V. B. McKoy and A. Gupta. Photocurable acrylic composition, and UV curing with development of. US Patent 5 141990, assigned to California Institute of Technology (Pasadena, CA), August 25, 1992. 

Chemical stability. Chemical stability was determined by immersing the impregnated specimens in various chemicals. At 6 and 12 months after exposure in different media, specimens were removed, dried, and subjected to compression tests. The tests indicated that impregnated specimens are stable to the action of solutions of salts, acids, and alkalis and imstable to the action of concentrated nitric, sulfuric, md hydrochloric adds. The most chemically stable is the acrylic composition. 

Lombardi, M. Guerriero, A. Kortaberria, G. Mondragon, L Sangermano M. Montanaro, L. (2011) Effect of the ceramic filler features on the properties of photo-polymerized BaTiOs-acrylic composites Polym. Compos., 32, pp (1304-1312). 

B. S. Rao and A. Palanisamy, Photocuring and thermomechanical properties of multifunctional amide acrylate compositions derived from castor oil , Prog Org Coat, 2010,67, 6-11. 

P. N. Bartlett, E. Simon, Poly(aniline)-poly(acrylate) composite films as modified electrodes for the oxidation of NADH , Physical Chemistry and Chemical Physics 2000, 2, 2599. 

Ogawa H, Studies on the improvement of productivity of high-performance polyacrylonitrile-based carbon-fibers. 1. Effects of comonomer methyl acrylate composition on production of polyacrylonitrile-copolymer-based carbon-fibers, Nippon Kogaku Kaishi, No.5, 464--470, 1994. 

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