Polymerization process involving addition of monofunctional vinyl monomer
US-11180591-B2 · Nov 23, 2021 · US
Component addition polymerization
US11548955B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11548955-B2 |
| Application number | US-201816759079-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 24, 2018 |
| Priority date | Nov 10, 2017 |
| Publication date | Jan 10, 2023 |
| Grant date | Jan 10, 2023 |
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Abstract
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Provided is a collection of polymeric beads, wherein the beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein, within each bead, the average concentration of moles of polymerized units of multifunctional vinyl monomer per cubic micrometer is MVAV; wherein, within each bead, T1000 is a sequence of 1,000 unique connected polymerized monomer units; wherein, within each T1000, MVSEQ is the weight percent polymerized units of multifunctional vinyl monomer, based on the weight of T1000; wherein MVRATIO=MVSEQ/MVAV; and wherein 90% or more of the beads by volume are uniform beads, wherein a uniform bead is a bead in which 90% or more of all T1000 sequences has MVRATIO of 1.5 or less.
First claim
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The invention claimed is: 1. A collection of polymeric beads, wherein the beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein, within each bead, the average concentration of moles of polymerized units of multifunctional vinyl monomer per cubic micrometer is MVAV; wherein, within each bead, T1000 is a sequence of 1,000 unique connected polymerized monomer units; wherein, within each T1000, MVSEQ is the weight percent polymerized units of multifunctional vinyl monomer, based on the weight of T1000; wherein MVRATIO=MVSEQ/MVAV; and wherein 90% or more of the beads by volume are uniform beads, wherein a uniform bead is a bead in which 90% or more of all T1000 sequences has MVRATIO of 1.5 or less. 2. The collection of polymeric beads of claim 1 , wherein, in 90% or more of the beads by volume, 90% or more of all T1000 sequences has MVRATIO of 1.25 or less. 3. The collection of polymeric beads of claim 1 , wherein the monofunctional monomer comprises styrene. 4. The collection of polymeric beads of claim 1 , wherein the multifunctional monomer comprises divinylbenzene. 5. The collection of polymeric beads of claim 1 , wherein 35% or less of the T1000 sequences have MVRATIO of 0.5 or less.
Assignees
Inventors
Classifications
- C08F2/18Primary
Suspension polymerisation · CPC title
Polymer with special particle form or size · CPC title
- C08F212/08Primary
Styrene · CPC title
Divinylbenzene · CPC title
Divinylbenzene · CPC title
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- What does patent US11548955B2 cover?
- Provided is a collection of polymeric beads, wherein the beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein, within each bead, the average concentration of moles of polymerized units of mul…
- Who is the assignee on this patent?
- Ddp Specialty Electronic Mat Us Inc, Ddp Specialty Electronic Mat Us 8 Llc
- What technology area does this patent fall under?
- Primary CPC classification C08F2/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 10 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).