Low molecular weight engineering thermoplastic polyurethane and blends thereof
AssigneeThe Dow Chemical Company
InventorsPaul J. Moses, Edward Louis D'Hooghe, Wilfred van Pelt
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Abstract
A low molecular weight engineering thermoplastic polyurethane (ETPU) can be homogeneously melt blended with a polyarylene ether (PAE) to give a low viscosity melt processable blend, and subsequently cooled to form a heterogeneous dispersion of the ETPU in the PAE that has two Tgs, one that is close to the Tg of the pure ETPU, and one that is close to the Tg of the pure PAE. As such, the composite blend retains the properties of the polyarylene ether.
Claims14
A composition that comprises a single phase melt containing 1) a polyarylene ether and 2) an engineering thermoplastic polyurethane having a) a Tg of at least 50° C. and b) a number average molecular weight of not greater than about 10000, and not less than 2000 amu;
- wherein the polyarylene ether is represented by the formula:
- 4
- where Ar is a substituted or unsubstituted aromatic nucleus and n is an integer of at least 10.
A two-phase solid composite that comprises 1) a polyarylene ether and 2) an engineering thermoplastic polyurethane having a) a Tg of at least 50° C. and b) a number average molecular weight of not greater than about 10,000, and not less than 2000 amu;
- wherein the polyarylene ether is represented by the formula:
- 5
- where Ar is a substituted or unsubstituted aromatic nucleus and n is an integer of at least 10, and wherein the composite is further characterized by having a first Tg within 5 C.° of the Tg of the pure engineering thermoplastic polyurethane and a second Tg within 10 C.° of the Tg of the pure polyarylene ether.
A composition comprising an engineering thermoplastic polyurethane having a Tg of at least 50° C. and a number average molecular weight of not more than 10,000 and not less than 3000 amu.
Dependencies are inferred from the claim text.