Modified conjugated diene polymer, method for preparing same, and rubber composition containing same
US-2017058055-A1 · Mar 2, 2017 · US
Polymer manufacturing method
US11608397B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11608397-B2 |
| Application number | US-201816633671-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 27, 2018 |
| Priority date | Jul 28, 2017 |
| Publication date | Mar 21, 2023 |
| Grant date | Mar 21, 2023 |
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Abstract
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Disclosed are a polymer having a narrow molecular weight distribution prepared by living radical and a polymer manufacturing method comprising a step of performing living radical polymerization using 0.005 to 0.5 parts by mass of an oxygen radical scavenger per 100 parts by mass of a radical polymerizable monomer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polymer manufacturing method comprising: a step of performing living radical polymerization in the presence of 0.005 to 0.5 parts by mass of an oxygen radical scavenger per 100 parts by mass of a radical polymerizable monomer, wherein the living radical polymerization is reversible addition-fragmentation chain transfer polymerization (RAFT polymerization). 2. The polymer manufacturing method according to claim 1 , wherein the oxygen radical scavenger comprises a phenolic compound. 3. The polymer manufacturing method according to claim 2 , wherein the phenolic compound comprises butylated hydroxytoluene. 4. The polymer manufacturing method according to claim 1 , wherein the radical polymerizable monomer comprises a diene-based monomer. 5. The polymer manufacturing method according to claim 4 , wherein the diene-based monomer comprises chloroprene. 6. The polymer manufacturing method according to claim 4 , wherein the diene-based monomer comprises chloroprene and at least one selected from the group consisting of 2,3-dichloro-1,3-butadiene, 1-chloro-1,3-butadiene, isoprene, and butadiene. 7. The polymer manufacturing method according to claim 1 , wherein the radical polymerizable monomer comprises chloroprene and acrylonitrile. 8. The polymer manufacturing method according to claim 1 , wherein the polymerization is performed in the presence of a chain transfer agent (CTA) represented by the following chemical formula (I) or (II): wherein in the chemical formula (I), R 1 represents hydrogen, chlorine, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclyl group; and in the chemical formula (I) and (II), R 2 to R 4 each independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted saturated, unsaturated, or aromatic carbocycle, a substituted or unsubstituted saturated, unsaturated, or aromatic heterocycle, an organometallic species, or any polymer chain.
Assignees
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Classifications
- C08F36/18Primary
containing chlorine · CPC title
conjugated · CPC title
Nitriles · CPC title
Living radical polymerisation · CPC title
containing chlorine · CPC title
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- What does patent US11608397B2 cover?
- Disclosed are a polymer having a narrow molecular weight distribution prepared by living radical and a polymer manufacturing method comprising a step of performing living radical polymerization using 0.005 to 0.5 parts by mass of an oxygen radical scavenger per 100 parts by mass of a radical polymerizable monomer.
- Who is the assignee on this patent?
- Denka Company Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F36/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 21 2023 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).