Reactive blend ploymer compositions with thermoplastic polyurethane
OwnerDidier Lagneaux, A. Donald Meltzerinventors
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Abstract
A polymer blend composition made by reacting a thermoplastic polyurethane polymer and another polymer such as poly(ethylene-co-vinyl acetate) polymer, having a functional group capable of reacting with an isocyanate. The polymers are reacted using a polyisocyanate compound during melt blending. Preferably, the melt blending occurs in an extruder. The polymer blend has improved tensile strength, improved abrasion resistance and higher melt strength, thus giving improved processability.
Claims59
A composition comprising the reaction product of:
- a) at least one thermoplastic polyurethane polymer;
- b) at least one blend partner polymer having a functionality group capable of reacting with an isocyanate;
- and
- c) at least one polyisocyanate compound.
A process for producing a polymer blend comprising melt mixing:
- a) at least one thermoplastic polyurethane polymer;
- b) at least one blend partner polymer having a functionality group capable of reacting with an isocyanate;
- and
- c) at least one polyisocyanate compound.
A shaped article comprising the reaction product of:
- a) at least one thermoplastic polyurethane polymer;
- b) at least one blend partner polymer having a functionality group capable of reacting with an isocyanate;
- and
- c) at least one polyisocyanate compound.
A polymer blend of thermoplastic polyurethane polymer and poly(ethylene-co-vinyl acetate) polymer wherein the ultimate tensile strength of said polymer blend is greater than the ultimate tensile strength of either said thermoplastic polyurethane polymer or said poly(ethylene-co-vinyl acetate) polymer, and the melt viscosity of said polymer blend is greater than the melt viscosity of said thermoplastic polyurethane polymer.
A process for producing a reactive polymer blend comprising mixing:
- a) at least one hydroxyl terminated intermediate;
- b) at least one chain extender;
- c) at least one polyisocyanate compound;
- and
- d) at least one blend partner polymer having a functionality group capable of reacting with an isocyanate.
A compatible blend comprising:
- a) a reactive blend polymer composition which is the reaction product of:
- (i) at least one hydroxyl terminated intermediate;
- (ii) at least one chain extender;
- (iii) at least one polyisocyanate compound;
- and (iv) at least one blend partner polymer having a functionality group capable of reacting with an isocyanate;
- and
- b) two or more immiscible polymers.
Dependencies are inferred from the claim text.