Melt processable polyurethaneurea copolymers and method for their preparation
First Claim
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1. A melt processable polyurethaneurea consisting essentially of a product reaction of a diisocyanate, a polyetherglycol, a diol chain extender, an amine terminated polyether and atmospheric moisture as a curing agent, said polyurethaneurea having a mino end caps as a result of being cured with said atmospheric moisture.
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Abstract
Melt processable polyurethaneureas are prepared from a diisocyanate, a polyglycol, a diol chain extender and an amine terminated polyether. Water may be included as a reactant, and the polymer may contain an additive such as a radiopaque material and a coating of an antithrombogenic agent or an antimicrobial agent. The invention includes a one-pot bulk polymerization method for preparation of the polymers.
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Citations
23 Claims
- 1. A melt processable polyurethaneurea consisting essentially of a product reaction of a diisocyanate, a polyetherglycol, a diol chain extender, an amine terminated polyether and atmospheric moisture as a curing agent, said polyurethaneurea having a mino end caps as a result of being cured with said atmospheric moisture.
- 7. A melt processable polyurethaneurea consisting essentially of a product from the reaction of a polyisocyanate, chain extender, polyglycol, polymeric amine terminated soft segment component selected from the group consisting of an amine terminated polyether, polyester, polyurea and polysiloxane, and atmospheric moisture as a curing agent, said polyurethaneurea having amino end caps as a result of being cured with said atmospheric moisture.
- 11. A melt processable polyurethaneurea consisting essentially of a product from the reaction of 4,4'"'"'-diphenylmethane diisocyanate, 1,4-butanediol, polytetramethyleneether glycol, amine terminated polypropylene oxide and atmospheric moisture as a curing agent, said polyurethane having amino end caps as a result of being cured with said atmospheric moisture.
- 13. A method for producing a melt processable polyurethaneurea consisting essentially of combining with mixing a diisocyanate and a mixture of a polyetherglycol, a diol chain extender and an amine terminated polyether at a temperature sufficient to induce an exotherm to give a clear and uniform melt of polyurethaneurea and curing said polyurethaneurea with said atmospheric moisture.
- 21. A method for producing a melt processable polyurethaneurea consisting essentially of combining with mixing a polyisocyanate, a polyglycol, a chain extender and an amine terminated polyether at a temperature sufficient to induce an exotherm to give a clear and uniform melt of thermoplastic polyurethaneurea and curing said polyurethaneurea with said atmospheric moisture.
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23. A method for producing a melt processable polyurethaneurea consisting essentially of adding 4,4'"'"'-diphenylmethane diisocyanate, with mixing, to a mixture of 1,4-butanediol, polytetramethylene ether glycol and an amine terminated polypropylene oxide at a temperature sufficient to induce an exotherm to give a clear uniform melt of a polyurethaneurea and moisture curing said polyurethaneurea.
Specification