Acrylic based dispersants manufacturing

The new route (process C) for manufacturing acrylic based polymers seems very promising. Polymers prepared by this way attain the efficiency of the best dispersants on the market. In the future, we will explore this route, improving parameters which are known to influence dispersant efficiency such as molecular... 

Polyvinyl acetate (PVA), acrylic and other polymer dispersions have been widely used as anti-dust treatments for concrete floors for many years. In general, the polymer dispersions have been similar to those used in the manufacture of emulsion paints, and until recently have tended to be based on dispersions of relatively large polymer particles (particle size 0.15-0.25 x 10 m). Dispersions are now becoming available which offer superior performance as floor sealers. The chemical and water resistance of the various polymer dispersions which have been used in the past vary considerably from the PVA types, which are rapidly softened and eventually washed out by water, to acrylic and SBR types which exhibit excellent resistance to a wide range of chemicals. Water-based sealers are gaining wider acceptance because of... 

Polymers based on acrylic acid are highly hydrophilic and are utilized in different applications that include superadsorbent materials, flocculants and dispersants. Polyacrylates and their copolymers range from soft and flexible materials to hard plastics, applied in the production of coatings, paints, binders and adhesives. Their applications include the manufacture of cars e.g., coatings, upholsteries and adhesives) and the textile e.g., binders for fiberfill and nonwoven fabrics), paper and leather industries. Methyl acrylate is mainly utilized for copolymerization with acrylonitrile to improve the dyeability of fibres. 

Base materials for circuit boards based on phenolic resin/paper laminates are used primarily for low-performance materials, which are needed, for example, in consumer electronics. The actual properties standard of these materials meets the requirements of the market. The laminating adhesives used for the manufacture of base materials are organic solutions or aqueous dispersions of thermosetting resins such as poly(vinyl butyral)-phenolic resin or acrylate-phenolic resin. 

Commercial impact-modified acrylic resins (Table 19.15) exhibit five- to tenfold improvement in the notched Izod impact strength and the ultimate tensile elongation compared to the neat PMMA resin. These impact-modified acrylics are usually blended captively by the manufacturers of the acrylic resins. The base resin in a typical weatherable grade (Plexiglas DR, Rohm and Haas) could be a methyl methacrylate copolymer with ethylacrylate and styrene, while the rubber additive (ca. 10 %) could be an emulsion-polymerized, PMMA-grafted, cross-linked poly (n-butylacrylate) rubber of controlled particle size (<200 nm). The nonweatherable impact-modified acrylic (XT, CYRO) typically consists of a MMA/S/AN copolymer with MBS (ca. 10 %) rubber particle dispersions. 

Acronal Dispersions based on uni- and copolymers of acrylic esters. Manufactured by BASF, Germany. 

Manufacturers Comments Natural resin dispersion adhesive, solvent free. Water-based acrylic dispersion. Flexible with good initial tack. 

S. (especially rosin-based) play an important role in synthetic rubber (SBR) manufacture and in vinyl- and acrylic - polymerization. Na- and Li-s. are used in - lubricants (greases). Leather may be cleaned with saddle s., which contains - beeswax or - camauba wax. S. also function as wetting and dispersing agents for pesticides. Ammonium soaps are used in cosmetic preparations and function as emulsifiers in - polishes and emulsion paints (- coating). 

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