Polymers, acrylate-based

With the advent of high-performance concrete and the development of third-generation (mostly acrylic polymer-based) superplasticizers which provide significantly higher water reduction at flowable consistencies, this demarcation has blurred. Through the use of a mixture of admixtures it is now possible to obtain highly durable low water-cement ratio concretes that are nearly self-leveling and yet quite cohesive. 

Branched acrylic polymers based upon the copolymerization of acrylates and related monomers with methacrylate macromonomers are particularly useful in waterborne coatings. A macromonomer based upon isobutyl methacrylate, 2-ethylhexyl methacrylate, and 2-hydroxyethyl methacrylate was copolymerized with butyl acrylate, 2-hydroxyethyl acrylate, meth-acrylic acid, methyl methacrylate, and styrene.518 After neutralization with dimethylethanolamine or inorganic bases, the polymer could be cross-linked with melamine resin on a metal surface. These systems may be used for either pigmented layers or clear coats. 

Chem. Desap. Aqueous dispersion of a thermoplastic acrylic polymer based on methyl methacrylat ethylacrylate copolymer, ammonia (< 5%), emulsifier... 

Chem. Descrip. Aqueous dispersion of a self-crosslinking acrylic polymer based on 2-ethylhexyl acrylate... 

Maruska et al. described the separations of polar aromatic solutes such as pyridine, 4-pyridylmethanol, 4-methoxyphenol, 2-naphthol, catechol, hydroqui-none, resorcinol, and 2,7-dihydroxynaphthalene by normal-phase micro-HPLC on acrylic polymer-based continuous beds as illustrated in Figure 8. Efficiencies of up to 150000 plates per meter were achieved on columns II and III, which only differ by their monomer composition. 

We developed a GI POF with an acrylic-polymer-based heterogeneous core, whose attenuation was 200 dB/km at 670 nm. The attenuation produces a radiation loss of around 50 dB/km because of the intrinsic scattering due to microscopic core heterogeneities. The core diameter and NA were 200 pm and 0.3, respectively. Figure 3.17 shows microscopic images of the input beams on the fiber near-end faces and the output beams on the PD for the GI POF under the center launching condition. As shown in Figure 3.17b, the output beam pattern of the GI POF... 

The characteristics of fluoropolymers are summarized in Table 1. Thermal and chemical resistance is in general with most of plastics, elastomers and perfluorinated membranes. Weather resistance with the outdoor durability for more than 20 years is specific for fluorinated paint resins. Surface properties such as water and oil repellency are provided by acrylic polymer-based textile finishes and coatings with long-chain per-fluoroalkyl groups. Electrical properties as well as a low refractive index are important for optoelectronics applications like optical fibers. 

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