Device comprising a cation ion-exchanger for reducing the acidity of motor oil and engine with such device
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Particles with radial variation
US2020216590A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020216590-A1 |
| Application number | US-201816648142-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 25, 2018 |
| Priority date | Sep 29, 2017 |
| Publication date | Jul 9, 2020 |
| Grant date | — |
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Abstract
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A polymeric bead having radius R wherein the polymer comprises 0.3% to 20% by weight, based on the weight of the polymer, of polymerized units of one or more multifunctional vinyl monomer and 80% to 99.7% by weight, based on the weight of the polymer, of polymerized units of one or more monofunctional vinyl monomer, (a) wherein the polymerized units of multifunctional vinyl monomer have radial distribution factor MR of 0.9 to 1.1, and (b) wherein some of the vinyl groups in the polymerized units of multivinyl monomer are unreacted, and the unreacted vinyl groups have a radial distribution factor VR of 2.5 or higher.
First claim
Opening claim text (preview).
1 . A polymeric bead having radius R wherein the polymer comprises 0.3% to 20% by weight, based on the weight of the polymer, of polymerized units of one or more multifunctional vinyl monomer and 80% to 99.7% by weight, based on the weight of the polymer, of polymerized units of one or more monofunctional vinyl monomer, (a) wherein the polymerized units of multifunctional vinyl monomer have radial distribution factor MR of 0.9 to 1.1, wherein MR=CMSHELL/CMCORE, wherein CMSHELL is the average concentration of polymerized units of multifunctional vinyl monomer located at a distance from the center of the bead of 0.8*R to R, and wherein CMCORE is the average concentration of polymerized units of multifunctional vinyl monomer located at a distance from the center of the bead of 0 to 0.5*R, and (b) wherein some of the vinyl groups in the polymerized units of multivinyl monomer are unreacted, and the unreacted vinyl groups have a radial distribution factor VR of 2.5 or higher, wherein VR is determined by a Raman spectroscopic measurement performed on the bead, wherein VR=V 1SHELL/ V 1CORE, wherein V1SHELL is the average of ratio V1 for measurements made at a distance from the center of the bead of 0.8*R to R, wherein V1CORE is the average of ratio V1 for measurements made at a distance from the center of the bead of 0 to 0.5*R, wherein V1=PCC/PAR, wherein PCC is the height of the Raman spectroscopic peak due to stretching of carbon-carbon double bonds, and PAR is the height of the Raman spectroscopic reference peak due to stretching of the aromatic ring at 1000 cm −1 . 2 . The polymeric bead of claim 1 , wherein the polymeric bead comprises a gel-type resin. 3 . The polymeric bead of claim 1 , wherein the monofunctional vinyl monomers comprise one or more styrenic monomer. 4 . The polymeric bead of claim 1 , wherein the multifunctional vinyl monomers comprise one or more styrenic monomer.
Assignees
Inventors
Classifications
- B01J39/20Primary
obtained by reactions only involving unsaturated carbon-to-carbon bonds · CPC title
- C08F212/08Primary
Styrene · CPC title
Divinylbenzene · CPC title
with the aid of macromolecular dispersing agents · CPC title
Core-shell polymer · CPC title
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- What does patent US2020216590A1 cover?
- A polymeric bead having radius R wherein the polymer comprises 0.3% to 20% by weight, based on the weight of the polymer, of polymerized units of one or more multifunctional vinyl monomer and 80% to 99.7% by weight, based on the weight of the polymer, of polymerized units of one or more monofunctional vinyl monomer, (a) wherein the polymerized units of multifunctional vinyl monomer hav…
- Who is the assignee on this patent?
- Dow Global Technologies Llc, Rohm & Haas
- What technology area does this patent fall under?
- Primary CPC classification B01J39/20. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jul 09 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).