Silicone alkyds

U.S. MiHtary Specification DOD-E-24635, Enamel, Gray, Silicone Alkyd Copolymer, for Exterior Use, Sept. 13, 1984. 

Silicone alkyd Tough Good Fair Poor Fair Best of group Very good Fair... 

Silicone alkyds Urethane alkyds Epoxy esters Tung oil phenolic... 

Silicone alkyds These are alkyds modified with silicone resin. They have superior resistance to weathering (particularly gloss retention) than pure alkyds but are generally significantly more expensive. They are useful for exterior use where appearance is important. 

Modified alkyd resins In this group one finds styrenated alkyds, vinyl toluenated alkyds, oil-modified vinyl resins, acrylic alkyds, silicone alkyds and polyurethane alkyds. The modifying component usually has a number of effects. It always increases the molecular weight of the alkyd polymer, and may impart hardness, durability, or chemical resistance. It also affects the solubility of the polymer in solvents. 

Silicone 65 Silicone acrylates Silicone alkyds Silicone defoamers... 

Although blending with other coating resins provides a variety of ways to improve the performance of alkyds, or of the other resins, chemically combining the desired modifier into the alkyd structure eliminates compatibility problems and gives a more uniform product. Several such chemical modifications of the alkyd resins have gained commercial importance. They include vinylated alkyds, silicone alkyds, urethane alkyds, phenolic alkyds, and polyamide alkyds. 

Silicone alkyds are etherification products of alkoxy-polysiloxane oligomers and the free hydroxyl groups of alkyd resins (67, 68). The property improvements and applications are similar to those of the alkyd-silicone blends, with the added advantage of incorporating the stable —Si—O—C— strucmre into the alkyd molecules. The preferred silicone oligomers are those with high phenyl contents, and... 

The resulting silicone-alkyd copolymers are thus formulated into coatings that have the same general and physical properties as alkyd resins and that can be applied in the usual manner. Silicone-alkyd copolymers generally require no special primer types. While there are numerous silicone intermediates that can be and are employed in the formation of organic-silicone copolymers, a few are shown (19) in Figure 1. 

Super structure and catwalks (enamel, silicone alkyd)... 

Reinforced plastics are composites in which a resin is combined with a reinforcing agent to improve one or more properties of the resin matrix. The resin may be either thermosetting or thermoplastic. Typical thermosetting resins used in RPs include unsaturated polyester, epoxy, phenolic, melamine, silicone, alkyd, and diallyl phthalate. In the field of reinforced thermoplastics (RTFs), virtually every type of thermoplastic material can be, and has been, reinforced and commercially molded. The more popular grades include nylon, polystyrene, polycarbonate, polyporpylene, polyethylene, acetal, PVC, ABS, styrene-acrylonitrile, polysulfone, polyphenylene sulfide, and thermoplastic polyesters. 

Chem. Descrip. Proprietary org. compd. in xylene Uses Antisettling agent for solv.-based systems, acid-catalyzed systems, coatings (acrylic, alkyd, vinyl, epoxy, polyester, silicone alkyd), aerosol paints, antifouling paints, automotive OEM, refinish, and primers, zinc dust primers, anticorrosive primers, marine topcoats, wood furniture coatings... 

Where circumstances suggest the use of a more conventional type of finishing paint with better tolerance of site application conditions than the above, silicone alkyd enamels should be considered. 

Liquid injection molding (LIM) A process of injection-molding thermosetting resins in which the uncured resin components are metered, mixed, and injected at relatively low pressures through nozzles into mold cavities, the curing or polymerization taking place in the mold cavities. The process is most widely used with resins that cure by addition polymerization such as polyesters, epoxies, silicones, alkyds, diallyl phthalate, and (occasionally) urethanes. 

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