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US 11,685,806 B2Granted
Melt processable thermoplastic polyurethane-urea elastomers
AssigneeLubrizol Advanced Materials, Inc.
InventorsUmit G. Makal, George H. Loeber, Lalith B. Suragani Venu
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Abstract
The present invention relates to a melt processable thermoplastic polyurethane-urea composition formed by a continuous bulk process without the presence of solvent using a polyol component, an isocyanate component, and chain extender component comprising a hindered aromatic diamine.
Claims15
A process for making a melt-processable thermoplastic polyurethane-urea elastomer composition comprising:
- (1) adding a reaction mixture to a heated extruder, said reaction mixture comprising (a) a diol having a number average molecular weight of 700 to 4000, (b) an isocyanate component;
- and (c) a chain extender component, said chain extender component comprising a hindered aromatic diamine;
- (2) reacting said diol, said isocyanate component, and said chain extender component in a one-shot polymerization process in said heated extruder to form a thermoplastic polyurethane-urea elastomer composition, wherein the composition comprises less than 20 mol % urea;
- (3) cooling said thermoplastic polyurethane-urea elastomer composition;
- and
- (4) processing said thermoplastic polyurethane-urea elastomer composition.
3 more elements
A process for making a molded article from a thermoplastic polyurethane-urea composition comprising:
- (1) adding a reaction mixture to a heated extruder, said reaction mixture comprising (a) a diol having a number average molecular weight of 700 to 4000, (b) an isocyanate component;
- and (c) a chain extender component, said chain extender component comprising diethyltoluenediamine;
- (2) reacting said polyol component, said isocyanate component, and said chain extender component in a one-shot polymerization process in said heated extruder to form a thermoplastic polyurethane-urea elastomer composition, wherein the composition comprises less than 20 mol % urea;
- (3) cooling said thermoplastic polyurethane-urea elastomer composition;
- (4) processing said thermoplastic polyurethane-urea elastomer composition;
- (5) melting said thermoplastic polyurethane-urea elastomer composition;
- (6) molding the melted thermoplastic polyurethane-urea elastomer composition into an article.
4 more elements
Dependencies are inferred from the claim text.