Degradable polymeric form and process for making
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United States of America Patent
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Nov 7, 1995
Grant Date -
N/A
app pub date -
Jun 11, 1993
filing date -
Jun 11, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A degradable polymeric foam having a density of not more than 16 lb. per cu ft. comprising a polymer alloy comprising: (i) from 50 to 100% of one or more co or homopolymers having a molecular weight of greater than 40,000 comprising the residues of one or more monomers of the Formula: --OCR.sub.1 R.sub.2 (CR.sub.3 R.sub.4).sub.n CO-- (I) or --OCH(CH.sub.3)CO-- (II) wherein in Formula I, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from the group consisting of a hydrogen atom and a C.sub.1-4 alkyl radical, and n is zero or an integer from 1 to 5, provided that when a monomer residue of Formula II is present and in Formula I n is 1 and R.sub.2, R.sub.3, and R.sub.4 are hydrogen, R.sub.1 can not be a methyl radical; and (ii) from 0 to 50 weight % of one or more polymers selected from the group consisting of polymers having a Hildebrand parameter (.sigma.) of not more than 3 MPA.sup.1/2 different from that of the one or more co or homopolymers.
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