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Methods and compositions for making an amino acid triisocyanate
US9573889B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9573889-B2 |
| Application number | US-201615048541-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 19, 2016 |
| Priority date | Jan 13, 2014 |
| Publication date | Feb 21, 2017 |
| Grant date | Feb 21, 2017 |
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Abstract
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A method of making an amino acid triisocyanate is provided, the method comprising reacting an amino acid trihydrochloride with phosgene to form the amino acid triisocyanate. In some embodiments, the amino acid trihydrochloride comprises lysine ester trihydrochloride salt and the amino acid triisocyanate comprises lysine ester triisocyanate. In some embodiments, there is a lysine ester triisocyanate having a purity of at least about 98%, the lysine ester triisocyanate having a structure resulting from reacting lysine ester trihydrochloride salt with phosgene to form the lysine ester triisocyanate. These lysine ester triisocyanates can be used to make biodegradable polyurethanes.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making phosgene, the method comprising heating triphosgene to form phosgene gas and contacting the phosgene gas with chlorobenzene or dichlorobenzene liquid to recover the phosgene gas in the liquid. 2. A method of making phosgene according to claim 1 , wherein the triphosgene is heated in the presence of a catalyst and recovered in chlorobenzene. 3. A method of making phosgene according to claim 2 , wherein (i) the catalyst comprises phenanthroline or (ii) the triphosgene is heated to a temperature from about 100° C. to about 200° C. 4. A method of making phosgene according to claim 3 , wherein the catalyst comprises 1,10 phenanthroline.
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Classifications
oxygen · CPC title
- C07C265/14Primary
containing at least two isocyanate groups bound to the same carbon skeleton · CPC title
Separation; Purification · CPC title
Chemistry & Metallurgy · mapped topic
by reaction of amines with carbonyl halides, e.g. with phosgene · CPC title
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- What does patent US9573889B2 cover?
- A method of making an amino acid triisocyanate is provided, the method comprising reacting an amino acid trihydrochloride with phosgene to form the amino acid triisocyanate. In some embodiments, the amino acid trihydrochloride comprises lysine ester trihydrochloride salt and the amino acid triisocyanate comprises lysine ester triisocyanate. In some embodiments, there is a lysine ester triisocya…
- Who is the assignee on this patent?
- Warsaw Orthopedic Inc
- What technology area does this patent fall under?
- Primary CPC classification C07C265/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 21 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).