Fast crystallizing polyalkyleneterephthalate resin compositions
AssigneePlastics Engineering Company
InventorChung J. Lee
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Abstract
The fast crystallizing polyalkyleneterephthalate resin compositions disclosed herein contain 0.025-2 percent by weight of NaI in the form of a selected complex of sodium iodide (NaI) and an organic compound, such as a polymeric compound, which contains at least two recurring units of the formula --CH.sub.2 CH.sub.2 O-- together with reinforcing agents, fillers and/or additives and optionally a flow promoter selected from low molecular weight organic esters or block copolymers containing a recurring structure of [(CH.sub.2).sub.x O--].sub.m wherein x is an integer of no more than 5 and m is an integer ranging from 2, preferably from 200 to about 5,000. The amount of complex is such as to give 0.025-2 percent, preferably 1-2 percent by weight of NaI based on the weight of polyalkyleneterephthalate.
Claims16
A fast crystallizing molding composition comprising essentially:
- a. a polyalkyleneterephthalate in which the alkylene group has 2-4 carbon atoms;
- b. a complex of NaI and a polymeric compound having at least two recurring units having the formula --CH.sub.2 CH.sub.2 O--, the amount of said complex being enough to give a proportion of 0.025-2 percent by weight of NaI based on the weight of said polyalkyleneterephthalate.
Dependencies are inferred from the claim text.