Charge transporting semi-conducting material and electronic device comprising it
US-10468601-B2 · Nov 5, 2019 · US
Preparation of sulfonated naphthalene polyoxadiazoles polymers
US9150693B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9150693-B2 |
| Application number | US-201313915690-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 12, 2013 |
| Priority date | Jun 15, 2012 |
| Publication date | Oct 6, 2015 |
| Grant date | Oct 6, 2015 |
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Abstract
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Described is the preparation of sulfonated polyoxadiazole polymers with a high degree of sulfonation and good flammability properties. The polymers are useful in articles such as fibers.
First claim
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What is claimed is: 1. A process for preparing a polymer, comprising the steps of: a) combining hydrazine, oleum, 2,6-naphthalene dicarboxylic acid, terephthalic acid and isophthalic acid, to form a reaction mixture, wherein i) the oleum is added in an amount of at least about 4 molar equivalents of SO 3 based on the number of moles of hydrazine, ii) the oleum is added in one step, and iii) the reaction mixture comprises about 1 molar % to about 50 molar % of 2,6-naphthalene…
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- C08G73/08Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US9150693B2 cover?
- Described is the preparation of sulfonated polyoxadiazole polymers with a high degree of sulfonation and good flammability properties. The polymers are useful in articles such as fibers.
- Who is the assignee on this patent?
- Du Pont
- What technology area does this patent fall under?
- Primary CPC classification C08G73/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 06 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).