Chlorinated rubber paints application

For special applications, however, such as for normally humid areas, and contaminated or chemically aggressive locutions, epoxy paints tne con.sidered to be more appropriate. They provide a protective coating which is resistant to chemical fumes, corrosion and temperature. Chlorinated rubber paints, which also fall into the same category of protective paints, may also be used for these areas but, not being temperature resistant, are not preferred to epoxy paints. 

Vinyls Vinyl chloride co-polymer resins were developed in the USA in the late 1930s. They have better weather and slightly more chemical resistance than chlorinated rubber paints. They are generally resistant to crude oil but application is more critical. For example, they are particularly sensitive to moisture present on a surface during painting and this can lead to adhesion failure. They are also more prone to solvent entrapment than chlorinated rubber paints. 

A wide range of paints and other organic coatings is used for the protection of mild steel structures. Paints are used mainly for protection from atmospheric corrosion. Special chemically resistant paints have been developed for use on chemical process equipment. Chlorinated rubber paints and epoxy-based paints are used. In the application of paints and other coatings, good surface preparation is essential to ensure good adhesion of the paint film or coating. 

Application. Chlorinated rubber paints can be applied with all conventional coating equipment. The suppliers (manufacturers ) instructions must, however, be observed since the coating material (chlorinated rubber paint) is specifically formulated for the recommended application equipment. 

The main area of use of chlorinated rubber paints is for underwater coatings on ships (see also Section 11.4). Favorable properties for this application are high water resistance, rapid drying (which is independent of the external temperature in the shipyard), good mutual adhesion of the individual layers, and the fact that old coats of paint can easily be renewed. 

Chlorinated Rubber-Acrylic Resin Combinations. Physically drying acrylic resins are used for these combinations. These combinations have the same drying rates as normal chlorinated rubber paints (see Section 2.3.2). They have improved flow properties (particularly when applied by pouring techniques), improved weather resistance (chalking and yellowing), and favorable mechanical properties (adhesion and extensibility). Applications include topcoats for ship superstructures and priming coats on galvanized surfaces. 

Chlorinated Rubber Painting System for Field Application Over a Shop>-Applied Solvent Base Inorganic Zinc-Rich Primer... 

Chlorinated rubber paints find application in rural and mountain areas with high humidity and much snow, in urban atmospheres because of their resistance to automobile exhausts and waste gases from factories, and in marine atmospheres because of their resistance to salt spray. The chlorinated rubber paints are degraded by UV light. 

Paints are complex formulations of polymeric binders with additives including anti-corrosion pigments, colors, plasticizers, ultraviolet absorbers, flame-retardant chemicals, etc. Almost all binders are organic materials such as resins based on epoxy, polyurethanes, alkyds, esters, chlorinated rubber and acrylics. The common inorganic binder is the silicate used in inorganic zinc silicate primer for steel. Specific formulations are available for application to aluminum and for galvanized steel substrates. 

Chlorinated rubber is soluble in aromatic solvents, and paints made from it dry by solvent evaporation alone. In contrast to the vinyls, there is less difficulty in formulating systems that are suitable for brush application. It has excellent resistance to a wide range of chemicals and to water, but as it is extremely brittle it needs to be plasticised. To preserve chemical resistance it is necessary to use inert plasticisers such as chlorinated paraffin wax. Due to the presence of ozone depleting solvents, chlorinated rubber coatings are being phased out and largely replaced by vinyl acrylic coatings which have very similar performance and can be formulated from lower aromatic or aliphatic solvents. 

Exterior surface corrosion or rusting of pipes occurs by the formation of iron oxides. Painting to an appropriate specification will significantly extend the period to the onset of corrosion, but the durability of the paint finish is largely dependent on the quality of the surface preparation as well as the thickness of the coated film. Improperly installed insulation can provide ideal conditions for corrosion and should be weatherproofed or otherwise protected from moisture and spills to avoid contact of the wet material on equipment surfaces. Application of an impervious coating such as bitumen to the exterior of the pipes is beneficial in some circumstances. Hypalon and neoprene rubber-based anticorrosive coatings admixed with chlorinated rubber are finding use in many installations. 

Chlorinated rubber is often used in combination with medium oil drying-type alkyds. The principal applications are highway traffic paint, concrete floor, and swimming pool paints. 

Chlorinated rubber is often used in combination with medium-oil drying type alkyds. The alkyd gives better toughness, flexibility, adhesion, and durability, and the chlorinated rubber contributes to faster dry and better resistance to water and chemicals. The major applications are highway traffic paint, concrete floor, and swimming pool paints. 

Composition. Chlorinated rubber combination paints contain a second resin as the property-determining binder. The chlorinated rubber is added to an alkyd resin, acrylic resin, or bituminous substances to improve properties such as drying rate, water resistance, or chemical resistance. This application only accounts for a small proportion of the total chlorinated rubber consumption. 

Chlorinated rubber Marine paints Aromatic hydrocarbons Aliphatic hydrocarbons Tends to string on spray application unless suitably formulated. Current formulations are frequently heavily thixotroped and are applied in very thick films... 

Zinc dust paints for air-drying applications are formulated either in synthetic organic media, such as epoxy resins and chlorinated rubber, or in silicate media. 

Chlorinated rubber is used in topcoats for heavy duty maintenance paints because of its low water permeability. It is also used in tie coats on polyolefin plastics. Chlorinated rubber dehydrochlorinates and requires stabilizers similar to those used with PVC. Some metal salts, especially those of iron, tend to promote degradation of chlorinated rubber and so it degrades when applied over rusty steel. Chlorinated ethylene/vinyl acetate copolymers have been developed that can be used to replace chlorinated rubber in at least some applications (183). 

MAJOR APPLICATION H-H PVC is mostly studied in academic field to understand its structure/property relationship, thermal degradation behavior, and mechanism. Its properties are compared to those of commercial head-to-tail PVC. Pure H-H PVC has no significant industrial applications. H-H PVCs containing 40-65 wt% of Cl, also called chlorinated polybutadiene rubber-resins, are used for coating, paint-based applications and the preparation of threads, tires, tubings, and films, etc. 

Chlorosulphonated polyethylene (CSM). A synthetic rubber produced by reacting polyethylene with chlorine and sulphur dioxide. Its products have good weather resistance even in light colours. Applications technical rubber goods, roofing sheets, fabric coatings, film-forming component in lacquers and paints. Trade name Hy-palon (USA). 

Two important chemical modification techniques for PE arc chlorination and sulphochlorination [6,7,8]. Chlorinated-PE is used for a variety of different applications depending on the level of chlorine incorporation [6]. Chlorinated-PEs with mass fractions of (10 to 40) % chlorine are used as synthetic rubbers. Those with mass fractions of (25 to 50) % chlorine arc used as a high molecular weight plasticizer, and those with mass fractions of (40 to 75) % chlorine are used as a binder for paints. Chlorinated-PE is also used as an impact modifier for poly(vinyl chloride). 

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