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Technology Profile: Production of Orthophthalic Unsaturated Polyester

By Intratec Solutions |

This column is based on “Orthophthalic Unsaturated Polyester Production Process – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/unsaturated-polyester-resin-production-cost. Unsaturated polyester resins (UPRs) are solutions of unsaturated polyesters in co-polymerizable monomers, which undergo cross-linkage to form thermosetting plastics. The unsaturated polyesters are produced by polycondensation of at least one unsaturated dicarboxylic acid with diols, while styrene is usually employed as a cross-linking agent. A wide range of UPRs is manufactured according to the intended processing and end-use properties. For example, orthophthalic formulations are used in marine crafts, marbles, gel-coat, buttons; isophthalic resins are used in storage tanks, pipes, pultruded profile and electrical-grade laminates; and dicyclopentadiene formulations are employed in molded electrical components, bathtub products and marine applications. Figure 1. The diagram shows a typical batch process for manufacturing orthophthalic polyester resin[/caption]             The process The present analysis covers orthophthalic UPR production. The process (Figure 1) comprises three major…
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