Acrylic coating polymers properties

History of the Synthesis of Acrylic Monomers and Polymers Relation between the Properties and Composition of Acrylic Coating Polymers General... 

Relation Between the Properties and Composition of Acrylic Coating Polymers... 

General. The solution and film properties of an acrylic coatings polymer are determined by (1) the molecular weight, (2) the nature of the polymer solution, and (3) the composition of the polymer backbone. 

C) It is well-known that the presence of certain types of functionality in the ester side chain imparts specific characteristic film properties to the acrylic coating (7). Some of these characteristics are summarized in Table II. By knowing the end use requirements of flexibility, adhesion, hardness, etc., the acrylic coatings polymer chemist can often tailor-make a polymer to fit the defined needs of the application. 

Polyurethane-acrylic coatings with interpenetrating polymer networks (IPNs) were synthesized from a two-component polyurethane (PU) and an unsaturated urethane-modified acrylic copolymer. The two-component PU was prepared from hydroxyethylacrylate-butylmethacrylate copolymer with or without reacting with c-caprolactonc and cured with an aliphatic polyisocyanate. The unsaturated acrylic copolymer was made from the same hydroxy-functional acrylic copolymer modified with isocyanatoethyl methacrylate. IPNs were prepared simultaneously from the two-polymer systems at various ratios. The IPNs were characterized by their mechanical properties and glass transition temperatures. 

The understanding of the relation between the macroscopic film properties of an acrylic coating and the polymer composition has been advanced significantly by the successful application and interpretation of two physical models (1) the glass transition temperature, Tg (2) the solubility parameter, 6. 

The properties of acrylic ester polymers depend largely on the type of alcohol from which the acrylic acid ester is prepared [26]. Solubility in oils and hydrocarbons increases as the length of the side chain increases. The lowest member of the series, poly(methyl acrylate), has poor low-temperature properties and is water sensitive. It is therefore restricted to such applications as textile sizes and leather finishes. Poly(ethyl acrylate) is used in fiber modifications and in coatings and poly(butyl acrylate) and poly(2-ethylhexyl acrylate) are used in the formulation of paints and adhesives. 

The results of investigations of the effect of method of hybrid dispersion synthesis (la, lb, 2 or 3 - see Section 3.2) on the properties of dispersions as well as of films and coatings made from them are presented in Tables 6.9 to 6.11 (dispersions prepared using water-soluble initiator) and in Tables 6.12 to 6.14 (dispersions prepared using redox initiating system). In all dispersions the chemical structure of the polyurethane-urea and acrylic/styrene polymer component was the same (see relevant tables in Section 6.5.2). All the dispersions contained a similar low level (2-3.6%) of NMP. 

Castellote M, Andrade C, Alonso C (2000) Electrochemictil removed of chlorides. Cem Concr Res 30(4) 615-621.doi 10.1016/S0008-8846(00)00220-9 Castelvetro V, Aghetto M, Ciardelli E, Chiantore O, Lazzari M, Toniolo L (2002) Structure control, coating properties, and durability of fluorinated acrylic-based polymers. J Coat Technol 74 57-66. doi 10.1007/BF02697984... 

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