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Methods and compositions for making an amino acid triisocyanate
US2016168085A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016168085-A1 |
| Application number | US-201615048541-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 19, 2016 |
| Priority date | Jan 13, 2014 |
| Publication date | Jun 16, 2016 |
| Grant date | — |
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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
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What is claimed is: 1 .- 12 . (canceled) 13 . A method of making phosgene, the method comprising heating triphosgene to form phosgene and recovering phosgene in an aromatic liquid containing chlorine. 14 . A method of making phosgene according to claim 13 , wherein the aromatic liquid containing chlorine comprises chlorobenzene or dichlorobenzene. 15 . A method of making phosgene according to claim 13 , wherein the triphosgene is heated in the presence of a catalyst and recovered in chlorobenzene. 16 . A method of making phosgene according to claim 15 , wherein (i) the catalyst comprises phenanthroline or (ii) the triphosgene is heated to a temperature from about 100° C. to about 200° C. 17 . A method of making phosgene according to claim 16 , wherein the catalyst comprises 1,10 phenanthroline. 18 . 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. 19 . A lysine ester triisocyanate according to claim 18 , wherein the lysine ester triisocyanate has a purity of at least about 99% to about 99.99%. 20 . A lysine ester triisocyanate according to claim 18 , wherein the lysine ester triisocyanate is reacted with a polyol or polyamine to form a biodegradable polyurethane or polyurea.
Assignees
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Classifications
oxygen · CPC title
Chemistry & Metallurgy · mapped topic
- C07C265/14Primary
containing at least two isocyanate groups bound to the same carbon skeleton · CPC title
aliphatic · CPC title
Phosgene · CPC title
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- What does patent US2016168085A1 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 Thu Jun 16 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).