Chlorinated rubber primer

Chlorinated rubber primer Airless spray, brush or roller 1 50... 

Substrates, Paints and Coatings. Both flash rusting and underfilm darkening studies exployed a white, pH 4.5, primer formulation (see Appendix), designated as Standard, based upon Haloflex 202, a chlorine-containing vinyl acrylic latex. A zinc phosphate free formulation, designated as Non-Standard, of pH6 was prepared by substitution of zinc phosphate for barytes. The comparison paints were a commercial butyl acrylate-methyl methacrylate water borne primer, formulated at pH 9, and a solvent based chlorinated rubber primer. 

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. 

It is usual to define primers in terms of the principal inhibiting pigment e.g. zinc phosphate, zinc dust or zinc chromate, and the topcoats in terms of the binder, e.g. alkyd, chlorinated rubber, etc. This practice can be confusing, however, and lead to the selection of incompatible coatings. 

A paste of zinc powder and carbon tetrachloride (with kieselguhr as thickener) will readily burn after ignition by a high-temperature primer [1]. Intimate mixtures of chlorinated rubber with powdered zinc (or its oxide) in presence or absence of hydrocarbon or halocarbon solvents react violently or explosively at about 216°C... 

Organic zinc-rich primers are based on epoxy/polyamides, high-molecular-weight linear epoxies, moisture-cured urethanes, high-styrene resins, chlorinated rubbers and epoxy esters. In this type of primer zinc is covered with a monomolecular layer of the binder which facilitates the adhesion of the film to the substrate. 

Resin systems for primers according to ISO 12944-5 are alkyds, chlorinated rubbers, acrylics, polyvinyl chlorides, epoxies, ethyl silicates and polyurethanes [5.108]. 

Prime coating is either a two-pack, zinc-rich epoxy primer with a DFT of ca. 30-40 pm, or a chromate-free, two-pack epoxy primer. Topcoats based on PVC copolymerisates, chlorinated rubber, silicone-reinforced epoxy esters, or alkyds were used for many years. Now, the standard European topcoat is based on acrylic resins with terminal epoxy groups that are cross-linked with amine adducts or aminoamide resins. 

Choice of an appropiate surface treatment and a suitable primer are important because adhesion to the substrates presents difficulties [11.37]. Primers based on modified alkyd resins or two-pack epoxy-resins for derusted ferrous metals mainly contain zinc phosphate and zinc OKide as corrosion protection pigments. Nonferrous metals are first washed with an ammoniacal wetting agent before applying the primer that contains a binder based on synthetic resins (e.g., PVC copolymers, chlorinated rubber) which ensure good adhesion to the substrate. The same primer must be used on zinc or galvanized surfaces because the use of alkyd resins causes embrittlement [11.38] The primed surfaces are largely topcoated with alkyd resin systems. 

A one-pack primer based on chlorinated rubber or chlorosulfonated polyethylene (as is conventional with galvanized surfaces) or a two-pack epoxy primer is then applied. The primer can be coated with a topcoat system that is usually formulated with medium or long oil alkyd resins [11.39]. 

C3 Interiors with high relative humidity, some air pollution. Exteriors in urban and industrial Sa2 /2 Zinc-rich primer. Finishing coats vinyl, chlorinated rubber or epoxy 3-4 175-240... 

Uses Thixotrope, antisagging agent, flow aid, pigment antisettling agent for nonaq. coatings, primers, fillers and topcoats based on chlorinated rubber, alkyds, epoxies, unsat. polyester, acrylates, PU, epoxy esters, PVC and copolymers Features Exc. seeding resist. 

For metal adhesion, polyisocyanates are best mixed into a solution of a synthetic or chlorinated rubber. Table 8.3 compares the adhesion of natural rubber tyre tread to mild steel using a polyisocyanate priming cement with that obtained using a chlorinated rubber cement. PVC also adheres well to most substrates treated with diisocyanate adhesion primers. 

Third Preventative paint Oil corrosion Preventative paint Oil corrosion System primer Chlorinated rubber... 

Second Etching primer Thick type vinyl or chlorinated rubber system Thick type epoxy primer Tar epoxy resin paint... 

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

General paint coating systems are a combination of oil-type rust preventative primer and long oil alkyd resin paint or chlorinated rubber paint (intermediate and overcoats) with a total thickness of less than 150 p,m. These are applied in relatively mild atmospheres such as rural, mountain, and city. 

Rural and mountain atmospheres. These atmospheres are usually mild. An oil-type rust preventative primer and phthalic acid resin paint overcoat is used. Chlorinated rubber and epoxy paints are used in areas having high humidity and heavy snowfalls. 

---