Method for producing water-absorbent resin
US-9221030-B2 · Dec 29, 2015 · US
Polyvinyl chloride resin and method of preparing the same
US9902817B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9902817-B2 |
| Application number | US-201314440221-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 1, 2013 |
| Priority date | Nov 2, 2012 |
| Publication date | Feb 27, 2018 |
| Grant date | Feb 27, 2018 |
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- Title
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Abstract
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Disclosed herein is a polyvinyl chloride resin, including: a first particle group having a particle diameter of 0.01 μm or more and less than 1 μm; and a second particle group having a particle diameter of 1 to 10 μm, wherein the volume ratio of the first particle group to the second particle group is 1:0.4 to 1:1.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of preparing a polyvinyl chloride resin, comprising the steps of: microsuspension-polymerizing a mixture of 100 parts by weight of a vinyl chloride monomer, 1 to 10 parts by weight of a vinyl chloride acetate monomer, 0.001 to 1.0 parts by weight of a polymerization initiator, 0.5 to 1.5 parts by weight of an anionic surfactant, 0.5 to 1.5 parts by weight of a nonionic surfactant, and 0.3 to 1.0 parts by weight of a buffering agent in an aqueous solvent to obtain a polyvinyl chloride resin latex; and spray-drying the polyvinyl chloride resin latex, wherein the polyvinyl chloride resin comprises a first particle group having a particle diameter of 0.01 μm to less than 1 μm, and a second particle group having a particle diameter of 1 to 10 μm, wherein the volume ratio of the first particle group to the second particle group is 1:0.4 to 1:1. 2. The method of claim 1 , wherein the anionic surfactant includes sodium dodecyl benzene sulfonate. 3. The method of claim 1 , wherein the nonionic surfactant includes cetyl alcohol. 4. The method of claim 1 , wherein the polyvinyl chloride resin has an average particle diameter of 1.2 to 1.5 μm.
Assignees
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Classifications
Particulate matter [e.g., sphere, flake, etc.] · CPC title
- C08F2/20Primary
with the aid of macromolecular dispersing agents · CPC title
Homopolymers or copolymers of vinyl chloride · CPC title
Vinyl chloride · CPC title
anionic · CPC title
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Frequently asked questions
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- What does patent US9902817B2 cover?
- Disclosed herein is a polyvinyl chloride resin, including: a first particle group having a particle diameter of 0.01 μm or more and less than 1 μm; and a second particle group having a particle diameter of 1 to 10 μm, wherein the volume ratio of the first particle group to the second particle group is 1:0.4 to 1:1.
- Who is the assignee on this patent?
- Hanwha Chemical Corp
- What technology area does this patent fall under?
- Primary CPC classification C08F2/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 27 2018 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).