Production and use of new thermoplastic polyurethane elastomers based on polyether carbonate polyols
US-2015232606-A1 · Aug 20, 2015 · US
Melt processable thermoplastic polyurethane-urea elastomers
US11685806B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11685806-B2 |
| Application number | US-202117172144-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 10, 2021 |
| Priority date | Mar 22, 2016 |
| Publication date | Jun 27, 2023 |
| Grant date | Jun 27, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
We claim: 1. 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. 2. The process of claim 1 , wherein said processing step includes forming pellets of polyurethane-urea elastomer composition. 3. The process of claim 1 wherein the reaction mixture is substantially free of solvent. 4. The process of claim 1 wherein the chain extender component comprises diethyltoluenediamine. 5. The process of claim 1 wherein the diol comprises a polycarbonate diol. 6. 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. 7. The process of claim 6 , wherein said processing step includes forming pellets of polyurethane-urea elastomer composition. 8. The process of claim 6 wherein the reaction mixture is substantially free of solvent. 9. The process of claim 6 wherein the diol component comprises a polycarbonate diol. 10. The process of claim 1 , wherein the isocyanate component comprises an aromatic isocyanate. 11. The process of claim 6 , wherein the isocyanate component comprises an aromatic isocyanate. 12. The process of claim 1 , wherein the diol comprises polymerized tetrahydrofuran (PTMEG). 13. The process of claim 6 , wherein the diol comprises polymerized tetrahydrofuran (PTMEG). 14. The process of claim 1 , wherein the diol comprises polycaprolactone diol. 15. The process of claim 6 , wherein the diol comprises polycaprolactone diol.
Assignees
Inventors
Classifications
under-water, e.g. underwater pelletizers · CPC title
Caprolactone and/or substituted caprolactone · CPC title
- C08G18/7671Primary
containing only one alkylene bisphenyl group · CPC title
Powdering or granulating · CPC title
aliphatic · CPC title
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Frequently asked questions
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- What does patent US11685806B2 cover?
- 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.
- Who is the assignee on this patent?
- Lubrizol Advanced Mat Inc
- What technology area does this patent fall under?
- Primary CPC classification C08G18/7671. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 27 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).