Composition for soft materials, and soft material
US-2015361209-A1 · Dec 17, 2015 · US
Production method for hydrophilic modified polyrotaxane
US9409999B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9409999-B2 |
| Application number | US-201114004849-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 5, 2011 |
| Priority date | Mar 14, 2011 |
| Publication date | Aug 9, 2016 |
| Grant date | Aug 9, 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 present invention aims to provide a method of producing a hydrophilic modified polyrotaxane, which enables production of a hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way. The present invention provides a method of producing a hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydrophilic modified polyrotaxane by modifying all or part of hydroxy groups on a cyclodextrin of a polyrotaxane with hydrophilic modifying groups, the polyrotaxane containing the cyclodextrin, a polyethylene glycol included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a drying step in which the prepared solution of the hydrophilic modified polyrotaxane is formed into a thin film state and dried.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of producing a hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydrophilic modified polyrotaxane by modifying all or part of hydroxy groups on a cyclodextrin of a polyrotaxane with hydrophilic modifying groups, the polyrotaxane containing the cyclodextrin, a polyethylene glycol included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a drying step in which the prepared solution of the hydrophilic modified polyrotaxane is formed into a thin film state and dried, a thickness of a thin film formed being 0.1 to 2 mm. 2. The method of producing a hydrophilic modified polyrotaxane according to claim 1 , wherein the polyethylene glycol has a weight average molecular weight of 1,000 to 500,000. 3. The method of producing a hydrophilic modified polyrotaxane according to claim 1 , wherein the drying step is carried out at a drying temperature of 70° C. to 200° C. 4. The method of producing a hydrophilic modified polyrotaxane according to the claim 1 , wherein the pressure in the dryer system in the drying step is equal to or lower than an atmospheric pressure. 5. The method of producing a hydrophilic modified polyrotaxane according to the claim 1 , wherein a drying time in the drying step is two minutes or shorter.
Assignees
Inventors
Classifications
- C08B37/0015Primary
Inclusion compounds, i.e. host-guest compounds, e.g. polyrotaxanes · CPC title
cyclic · CPC title
Cyclodextrin; Derivatives thereof · CPC title
End-capping · CPC title
Manufacture of films or sheets · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9409999B2 cover?
- The present invention aims to provide a method of producing a hydrophilic modified polyrotaxane, which enables production of a hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way. The present invention provides a method of producing a hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydro…
- Who is the assignee on this patent?
- Yamasaki Tomoaki, Okazaki Shinya, Okazaki Hiroki, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification C08B37/0015. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 09 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).