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...
Patent
1995-09-26
1996-11-12
Michl, Paul R.
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...
528 44, 528 74, 528 85, 528 86, C08J 300, C08K 320, C08L 7500, C08G 1800
Patent
active
055740928
ABSTRACT:
The present invention is a rigid thermoplastic polyurethane having a T.sub.g of at least 50.degree. C. having a sufficient concentration of units derived from an aromatic diol to lower the temperature at which the rigid thermoplastic polyurethane can be melt processed. The present invention is also a thermoplastic polyurethane with a flex modulus of at least 100,000 psi, and having a sufficient concentration of units derived from an aromatic diol to lower the temperature at which the thermoplastic polyurethane can be melt processed. The compositions of the present invention show improved processability with insubstantial loss of physical properties.
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Odian, G., Principles of Polymerization, 1981, pp. 28-29.
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Ulrich, Kirk-Othmer: Encyclopedia of Chemical Technology, vol. 23, 3rd Edition, p. 598 (1983).
Oertel Richard W.
Oriani Steven R.
Michl Paul R.
Niland Patrick
The Dow Chemical Company
Willis Reid S.
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