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US4154920A Methods for producing improved stable polyethylene terephthalate 失效
生产改进的稳定聚对苯二甲酸乙二醇酯的方法

Methods for producing improved stable polyethylene terephthalate
Abstract:
Methods for producing improved, thermally-stable polyethylene terephthalate resins are provided. Polyethylene terephthalate resins are provided that can be fabricated into products such as carbonated beverage containers with a minimum of degradation products such as acetaldehyde preferably by rapidly polymerizing a prepolymer from an i.v. of about 0.2 to an i.v. of at least about 0.7.
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