Functionalized polymer particles for use as toughening agent
US-2015337183-A1 · Nov 26, 2015 · US
Method for production of biodegradable polyoxyethylene derivative
US8993687B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993687-B2 |
| Application number | US-201414205625-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 12, 2014 |
| Priority date | Mar 26, 2013 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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There is provided a method for production of a high-purity biodegradable polyoxyethylene derivative on an industrial scale using a polyoxyethylene compound containing polylactic acid at the terminal thereof. A biodegradable polyoxyethylene compound represented by formula (1) and a compound represented by formula (I) are caused to react with each other at 60° C. to 120° C. using toluene as a solvent in the presence of sodium acetate to obtain a biodegradable polyoxyethylene derivative represented by formula (2).
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for production of a biodegradable polyoxyethylene derivative, the method comprising causing a reaction of a biodegradable polyoxyethylene compound represented by formula (1) below: (in formula (1), Z represents a residue of a compound having 1 to 8 hydroxyl groups, m represents 1 to 2000, n represents 1 to 20, and k represents 1 to 8)…
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- C08G65/48Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08G65/332Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8993687B2 cover?
- There is provided a method for production of a high-purity biodegradable polyoxyethylene derivative on an industrial scale using a polyoxyethylene compound containing polylactic acid at the terminal thereof. A biodegradable polyoxyethylene compound represented by formula (1) and a compound represented by formula (I) are caused to react with each other at 60° C. to 120° C. using toluene as a sol…
- Who is the assignee on this patent?
- Nof Corp
- What technology area does this patent fall under?
- Primary CPC classification C08G65/48. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 2015 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).