Polycarbonate block copolymers
US-9102800-B2 · Aug 11, 2015 · US
Polycarbonate block copolymers
US9422397B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9422397-B2 |
| Application number | US-201514795789-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 9, 2015 |
| Priority date | Nov 1, 2008 |
| Publication date | Aug 23, 2016 |
| Grant date | Aug 23, 2016 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The disclosure pertains to amphiphilic block copolymers comprising an aliphatic polycarbonate chain coupled to a hydrophilic polymer. Such amphiphilic polymers may have the formula A-L-B, where A- is a polycarbonate or polyethercarbonate chain having from about 3 to about 500 repeating units, L is a linker moiety and -B is a hydrophilic oligomer having from about 4 to about 200 repeating units. Provided copolymers are useful as surfactants capable of emulsifying aqueous solutions and supercritical carbon dioxide. Provided copolymers also have utility as additives for use in enhanced oil recovery methods.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for the synthesis of a copolymer comprising reacting an epoxide and carbon dioxide in the presence of a suitable catalyst and a polyether chain transfer agent, wherein the polyether chain transfer agent contains on one terminus a labile group that can be removed after construction of the copolymer to yield a terminal hydroxyl group. 2. The method of claim 1 , further comprising the step of removing the labile group to yield a ter…
Assignees
Inventors
Classifications
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9422397B2 cover?
- The disclosure pertains to amphiphilic block copolymers comprising an aliphatic polycarbonate chain coupled to a hydrophilic polymer. Such amphiphilic polymers may have the formula A-L-B, where A- is a polycarbonate or polyethercarbonate chain having from about 3 to about 500 repeating units, L is a linker moiety and -B is a hydrophilic oligomer having from about 4 to about 200 repeating units.…
- Who is the assignee on this patent?
- Novomer Inc
- What technology area does this patent fall under?
- Primary CPC classification C09K8/588. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 23 2016 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).