High-molecular weight synthetic resins
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United States of America Patent
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Aug 3, 1993
Grant Date -
N/A
app pub date -
Mar 21, 1991
filing date -
Mar 23, 1990
priority date (Note) -
Expired
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Abstract
High-molecular weight synthetic resins of polyhexamethylene adipates are disclosed with molecular weights greater than about 10,000, preferably greater than about 30,000, and a viscosity at 100.degree. C. of at least about 300 poise, preferably exceeding 6000. The polymerization is carried out with a ratio of diol/acid in the range 0.990 to about 1.03, preferably in the range of about 1.001 to about 1.01.
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