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Hexion Inc. or Hexion (previously Momentive Specialty Chemicals) [2] is a chemical company based in Columbus, Ohio.It produces thermoset resins and related technologies and specialty products.
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Alternately, resin casting may be accomplished with a resin plus a nearly equal amount of a "hardener" liquid (as in many epoxy resin or polyester resin systems), which functionally contains a second polymer, for use in forming a final product plastic which is a copolymer. Copolymers contain two different alternating chemical entities in the ...
V-process casting – Vacuum with thermoformed plastic to form sand molds. No moisture, clay or resin required. Die casting – Metal mold. Billet (ingot) casting – Simple mold for producing ingots of metal, normally for use in other foundries. Loam molding – a built up mold used for casting large objects, such as cannon, steam engine ...
Bakelite resin could be provided either as powder or as preformed partially cured slugs, increasing the speed of the casting. Thermosetting resins such as Bakelite required heat and pressure during the molding cycle but could be removed from the molding process without being cooled, again making the molding process faster.
Shell molding, also known as shell-mold casting, [1] is an expendable mold casting process that uses resin covered sand to form the mold. As compared to sand casting , this process has better dimensional accuracy, a higher productivity rate, and lower labour requirements.
Methyl methacrylate "synthetic resin" for casting (simply the bulk liquid chemical) may be used in conjunction with a polymerization catalyst such as methyl ethyl ketone peroxide (MEKP), to produce hardened transparent PMMA in any shape, from a mold. Objects like insects or coins, or even dangerous chemicals in breakable quartz ampules, may be ...
Synthetic casting "resin" for embedding display objects in Plexiglas/Lucite is simply methyl methacrylate liquid, into which a polymerization catalyst is added and mixed, causing it to "set" (polymerize). The polymerization creates a block of PMMA plastic ("acrylic glass") which holds the display object inside a transparent block.