Photosensitive resin compositions, processes for preparing cured films, the resulting cured films, organic EL display devices and liquid crystal display devices
US-9223211-B2 · Dec 29, 2015 · US
Star polymer and method of producing same
US9023950B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9023950-B2 |
| Application number | US-201113639792-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 18, 2011 |
| Priority date | Apr 21, 2010 |
| Publication date | May 5, 2015 |
| Grant date | May 5, 2015 |
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Abstract
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The present invention provides a styrene-based star polymer with narrow dispersion and suitable as a resist material, etc. A star polymer of the present invention is represented by the formula A[C(Y)X m ] n (wherein A represents a polyvalent aliphatic hydrocarbon group with 4-15 carbons, C represents a carbon atom, X represents a styrene-based polymer chain, Y represents a hydroxy group or an oxo group, m represents an integer of 1 or 2, and n represents any integer from 2 to 5, with the proviso that if Y is a hydroxy group, m is 2, and if Y is an oxo group, m is 1). The star polymer can be produced by reacting a styrene-based polymer having an anionic end, and an aliphatic carboxylic acid ester represented by A(COOR) n (wherein R represents an alkyl group having 1-8 carbons, and A and n are as defined for the above formula).
First claim
Opening claim text (preview).
The invention claimed is: 1. A star polymer represented by the formula: A[C(Y)X m ] n wherein: A represents a polyvalent aliphatic hydrocarbon group having 4-15 carbons, C represents a carbon atom, X represents a homopolymer chain of hydroxystyrene, Y represents a hydroxy group or an oxo group, m represents an integer of 1 or 2, and n represents any integer from 2 to 5, with the proviso that if Y is a hydroxy group, m is 2, and if Y is an oxo gr…
Assignees
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Classifications
- C08F12/22Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9023950B2 cover?
- The present invention provides a styrene-based star polymer with narrow dispersion and suitable as a resist material, etc. A star polymer of the present invention is represented by the formula A[C(Y)X m ] n (wherein A represents a polyvalent aliphatic hydrocarbon group with 4-15 carbons, C represents a carbon atom, X represents a styrene-based polymer chain, Y represents a hydroxy group or an …
- Who is the assignee on this patent?
- Shirai Akihiro, Niitani Takeshi, Nippon Soda Co
- What technology area does this patent fall under?
- Primary CPC classification C08F12/22. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 05 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).