Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1997-04-08
1998-11-03
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528296, 528298, 528300, 528301, 528302, 528307, 528308, 5283083, 5283086, 528481, 528492, 525437, C08G 6320, C08F 600
Patent
active
058309829
ABSTRACT:
Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene terephthalate) material by means of rapid heat transfer to or from the material. The poly(ethylene terephthalate) composition is suitable for use as a starting material for solid-state polymerization in order to produce polymers of higher molecular weight. A higher molecular weight polymer product having a unique physical form can be produced by solid-state polymerization of the low molecular weight poly(ethylene terephthalate).
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Blanchard Elwood Neal
Leffew Kenneth Wayne
Stouffer Jan M.
Acquah Samuel A.
E. I. Du Pont de Nemours and Company
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