Glass flake-reinforced

Unsaturated polyesters The formation of the coating occurs in situ by the reaction between polyester resin and styrene, activated by a catalyst such as organic peroxide. The main use as coatings is in the formation of glass fiber or glass flake, reinforced plastics. 

An alternative to rubber linings which suit corrosive environments are glass flake reinforced plastics. They combine impact, erosion and abrasion resistance and can be applied on site using a spray or brush. They are compounds of glass flakes with various corrosion resistant thermosetting resins combined in different ratios. The excellent adhesion enables bonding with steel at temperatures as high as 170 "C. 

Coal-tar epoxy systems and vinyl tar coating have been used rather successfully from a technical point of view, but their use is now forbidden in some industrialized countries because of their effect on human health. In their place, high solid tar-free epoxy and glass flake-reinforced epoxies are used. 

Where pressure vessels are relatively thin in the absence of any corrosion allowance, the use of solid corrosion-resistant alloys such as stainless steel and nickel-based alloys may be more suitable than corrosion allowances or the use of internal cladding. However, for thicker vessels it is likely that internal corrosion-resistant alloy cladding will provide the most economical solution. In certain circumstances, the use of coal tar epoxy, glass-flake reinforced resins or other non-metallic coatings may be appropriate. The followings should be considered where there is a choice between cladding or lining, and solid corrosion- resistant material ... 

Unsaturated polyesters, glass flake and fiber reinforced... 

Flakeglas copolymers with butadiene Glass flakes for reinforcements Owens-Corning Fiberglas... 

Reinforced RIM (RRIM) elastomers are used. By the addition of reinforcing fillers such as milled glass fiber, glass flake, or mineral fillers in the polyurethane or short to long glass fiber in preforms, fabric, or mat forms placed in the mold cavity, the properties of the material can be altered to meet high performance requirements of the part (Chapter 15). The reinforced elastomers are used to increase flexural modulus, improve thermal properties, and improve dimensional stability.267... 

The mold in RRIM is similar to resin transfer molding (RTM) (Chapter 15). In the reinforced RIM (RRIM) process reinforcements such as woven or nonwoven fabrics, short glass fibers, glass flakes, milled fibers dry reinforcement preform, etc. are placed in a closed mold. Next a reactive plastic system is mixed under high pressure in a specially... 

It is impossible to achieve a dft between 400-500 xm in two coats without fibre glass reinforcement. In some laminate systems, glass flakes are also used as fillers. Their function is to minimise the shrinkage stress. 

Polyester coatings are suitable for concrete and steel substrates. The systems are generally used as laminates in conjunction with the use of glass cloth or glass flakes as the reinforcement. Polyester coatings are particularly useful in areas where resistance to mineral acids is required. Typical properties of polyester coatings are given in Table 9.2. 

Surface Quality. Class "A surface (after painting) is considered by the automotive industry as their first requirement for an exterior part. Comparing the surface quality of several reinforcements in RRIM urethane panels, it was found by visual examination that the best surface quality was the glass flakes and the worst was the integral chopped strands. Milled fiber is slightly worse than glass flakes, but it is still considered a "Class A" surface. 

In the context of corrosion, composites refer to glass or other fiber or flake-reinforced thermosetting resins. Composite products use for their anticorrosion properties are fiberglass-reinforced pipe and storage tanks, fiber-reinforced plastic grating, handrails, I-beams, and other shapes equal to these that are made of steel. 

Extensive compounding of different amounts and combinations of additives (colorants, flame retardants, heat and light stabiHzers, and so on), fillers (calcium, carbonate, and so on), and reinforcements (glass fibers, glass flakes, graph-... 

Also available are whisker reinforcements with exceptional high performances (Chapter 2). Also used are non-fibrous materials, such as steel wire (Table 1.6), and surface-treated mineral fillers that include mica platelets, talc, fibrous and finely divided minerals, glass flakes, and hollow and/or solid glass micro spheres. Lightweight expanded materials, such as sheets of reinforced foam or honeycomb, are used as cores in sandwich structures (Chapter 7). 

Thermosetting UP and VE resins reinforced by glass flakes, which have a thickness of only a few microns and lie parallel to the surface of the substrate, are applied as grouts and sprayed coats, especially to protect gas ducts in flue gas desulfurization units, even in cases where condensates form. Other applications of these easily applied coatings, which are also relatively diffusion-proof when sinalized flakes are used, include the covers of large rubber-lined, brick-lined, or laminate-coated tanks. 

Figure 1.10 Effect of various particulate fillers on the interlaminar shear strength of glass fabric reinforced epoxy resin laminates (23]. A, no filler B, BOixm glass beads, untreated C, same but silane treated D, 7 i,m glass beads, untreated E, same but silane treated F, 15p.m glass flakes G, 8 i,m calcium carbonate H, 15p.m quartz I, 15p.m alumina trihydrate, fire retardant J, 20p.m mica K, 60p.m thin-walled hollow-glass microspheres...

ECR glass flake can be used to provide reinforcement to the barrier layers. Resistance to highly corrosive environments can be further improved by employing ECR, Chemglass, S or R, glass fibres instead of E-glass for the structural wall. 

Glass beads and microspheres are frequently silane treated, and special grades may have metallic coatings. Glass flakes are promoted by Glassflake Ltd. as constituents of anticorrosion barriers in reinforced plastics structures, including pipe. The company offers a wide range of thicknesses and particle size distributions. 

High Glass Transition Impact- modified 15% Glass Fiber-reinforced 20% Glass Fiber-reinforced 30% Glass Fiber-reinforced Mineral- filled 30% Graphite Fiber 40% Aluminum Flake Un- reinforced Unfilled 10-20% Glass Fiber-reinforced... 

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