5559198 Process for preparing poly(vinyl
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Article
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1997
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Elsevier Science
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English
โ 115 KB
Previously used poly(ethylene terephthalate) polyester materials and copolymers thereof, and in particular postconsumer polyester materials, are depolymerized and repolymerized to produce bottle grade polymer containing up to 75% of the previously used material. The process involves the solubilizati