Biodegradable polyester with improved molding characteristics an

Details Biodegradable polyester with improved molding characteristics an Biodegradable polyester with improved molding characteristics an

1998-05-28

1999-03-23

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528354, 528355, 528357, 528359, 528361, 524765, 524783, 524784, C08K 506, C08G 6308

Patent

active

058860932

ABSTRACT:
The invention relates to a method for preparing a biodegradable aliphatic polyester, which comprises polymerization of a precursor of the polyester in the presence of a polyesterification catalyst in an amount of up to 0.1% by weight, based on the weight of the cyclic precursor, and a co-catalyst comprising glycerol or butyrolactone in a weight proportion of not more than three times that of the catalyst.
The invention also relates to the use of the resulting biodegradable aliphatic polyester in polymer processing, such as injection molding or compression/press molding.

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patent: 5679723 (1997-10-01), Cooper et al.
patent: 5747637 (1998-05-01), Shinoda et al.
patent: 5801224 (1998-09-01), Narayan et al.

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