Homogeneous, flexible block copolyetheramide having oxyalkylene units
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United States of America Patent
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Apr 26, 1988
Grant Date -
N/A
app pub date -
Mar 28, 1986
filing date -
Mar 28, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Novel, homogeneous and flexible block copolyetheramides, having a melting point of at least 150.degree. C., a glass transition temperature not exceeding -5.degree. C. and a melt viscosity of at least 100 poises, are preferably prepared by prepolymerizing a mixture of a salt of a short-chain aliphatic dicarboxylic acid and a short-chain aliphatic diamine with a fatty acid(s) dimer or amino derivative thereof, and then polycondensing the prepolymer in the presence of a strong organic or inorganic oxyacid, with a polyoxyalkylenediamine or a polyoxyalkylenedicarboxylic acid having a number-average molecular weight ranging from 300 to 1200.
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