Method for producing vinyl ether polymer having hydroxyl group on side chain and temperature-responsive polymer mixture
US-2018371127-A1 · Dec 27, 2018 · US
Method for producing hydroxyl group-containing vinyl ether polymer
US10633469B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10633469-B2 |
| Application number | US-201615579301-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2016 |
| Priority date | Jul 3, 2015 |
| Publication date | Apr 28, 2020 |
| Grant date | Apr 28, 2020 |
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Abstract
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A method for producing a hydroxyl group-containing vinyl ether polymer according to the present invention includes: a step of radical polymerizing at least one vinyl ether selected from vinyl ether having a hydroxyl group represented by the following formula (2): wherein R 7 represents an alkylene group which is straight-chained, branched or comprises an alicyclic structure, and p is 1, 2, or 3, in the presence of water as a polymerization solvent and an azo compound represented by the following formula (1) as a polymerization initiator: wherein R 1 to R 4 each independently represent a hydrogen atom or an alkyl group and R 5 and R 6 each independently represent an alkoxy group optionally having a substituent group or an alkyl amino group optionally having a substituent group.
First claim
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The invention claimed is: 1. A method for producing a hydroxyl group-containing vinyl ether polymer, comprising: a step of radical polymerizing at least one vinyl ether selected from vinyl ether having a hydroxyl group represented by the following formula (2): wherein R 7 represents an alkylene group which is straight-chained, branched or comprises an alicyclic structure, and p is 1, 2, or 3, in the presence of water as a polymerization solvent and dimethyl 2,2′-azobis (2- methylpropionate) as a polymerization initiator, and the amount of said dimethyl 2,2′-azobis (2-methylpropionate) added is from 0.01 to 0.5 mol % based on said vinyl ether, wherein the monomer conversion rate is 95% or more in the step of radical polymerization. 2. The method for producing a polymer according to claim 1 , wherein the monomer conversion rate is 99% or more in the step of radical polymerization. 3. The method for producing a polymer according to claim 1 , wherein the amount of said dimethyl 2,2′-azobis(2-methylpropionate) added is from 0.01 to 0.2 mol % based on said vinyl ether and the number average molecular weight Mn of the hydroxyl group-containing vinyl ether polymer is from 10,000 to 600,000. 4. A method for producing an aqueous hydroxyl group-containing vinyl ether polymer solution comprising water and a hydroxyl group-containing vinyl ether polymer, the method comprising: a step of radical polymerizing at least one vinyl ether selected from vinyl ether having a hydroxyl group represented by the following formula (2): wherein R 7 represents an alkylene group which is straight-chained, branched or comprises an alicyclic structure, and p is 1, 2, or 3, in the presence of water as a polymerization solvent and dimethyl 2,2′-azobis(2-methylpropionate) as a polymerization initiator, and the amount of said dimethyl 2 2′-azobis (2-methylpropionate) added is from 0.01 to 0.5 mol % based on said vinyl ether, wherein the monomer conversion rate is 95% or more in the step of radical polymerization; and a step of storing the obtained hydroxyl group-containing vinyl ether polymer in an aqueous solution. 5. The method for producing an aqueous polymer solution according to claim 4 , wherein the monomer conversion rate is 99% or more in the step of radical polymerization. 6. The method for producing an aqueous polymer solution according to claim 4 , wherein the amount of said dimethyl 2,2′-azobis(2-methylpropionate) added is from 0.01 to 0.2 mol % based on said vinyl ether and the number average molecular weight Mn of the hydroxyl group-containing vinyl ether polymer is from 10,000 to 600,000.
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Classifications
Acyclic compounds · CPC title
Azo-compounds · CPC title
Monomers containing only one unsaturated aliphatic radical · CPC title
Homopolymers or copolymers of unsaturated ethers (C08L35/08 takes precedence) · CPC title
Homopolymers or copolymers of unsaturated ethers (C09D135/08 takes precedence) · CPC title
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- What does patent US10633469B2 cover?
- A method for producing a hydroxyl group-containing vinyl ether polymer according to the present invention includes: a step of radical polymerizing at least one vinyl ether selected from vinyl ether having a hydroxyl group represented by the following formula (2): wherein R 7 represents an alkylene group…
- Who is the assignee on this patent?
- Maruzen Petrochem Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F16/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 28 2020 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).