Functionalized nitrile rubbers and the production thereof
US-10011664-B2 · Jul 3, 2018 · US
Depolymerizer and recycled rubber
US11713362B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11713362-B2 |
| Application number | US-202017135344-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 28, 2020 |
| Priority date | Dec 28, 2020 |
| Publication date | Aug 1, 2023 |
| Grant date | Aug 1, 2023 |
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- Title
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- Abstract
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Abstract
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A depolymerizer is formed by grafting thiol groups on parts of the double bonds of a polymer of linear conjugated diene monomer. The linear conjugated diene monomer can be 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl-1,3-pentadiene, 2-phenyl-1,3-butadiene, or 4,5-diethyl-1,3-octadiene. The depolymerizer has a weight average molecular weight of 1000 to 400000.
First claim
Opening claim text (preview).
What is claimed is: 1. A depolymerizer, having a chemical structure of wherein (a+a′+b+b′):(m+n)=0.01:1 to 0.67:1, a>0, a′>0, b>0, and b′>0. 2. The depolymerizer as claimed in claim 1 , having a weight average molecular weight of 1000 to 400000. 3. A recycled rubber, being formed by depolymerizing 100 parts by weight of rubber using 0.5 to 10 parts by weight of a depolymerizer, wherein the depolymerizer has a chemical structure of wherein (a+a′+b+b′):(m+n)=0.01:1 to 0.67:1, a′>0 b>0, and b′>0. 4. The recycled rubber as claimed in claim 3 , wherein the rubber comprises poly(cis-1,3-butadiene) rubber, polystyrene-butadiene rubber, nitrile rubber, buna rubber, ethylene propylene rubber, butyl rubber, or a combination thereof. 5. The recycled rubber as claimed in claim 3 , wherein the depolymerizer has a weight average molecular weight of 1000 to 400000.
Assignees
Inventors
Classifications
Devulcanisation · CPC title
- C08C19/08Primary
Depolymerisation · CPC title
Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule · CPC title
containing elements other than carbon and hydrogen · CPC title
- C08C19/20Primary
Incorporating sulfur atoms into the molecule · CPC title
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- What does patent US11713362B2 cover?
- A depolymerizer is formed by grafting thiol groups on parts of the double bonds of a polymer of linear conjugated diene monomer. The linear conjugated diene monomer can be 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl-1,3-pentadiene, 2-phenyl-1,3-butadiene, or 4,5-diethyl-1,3-octadiene. The depolymerizer has a weight average molecular…
- Who is the assignee on this patent?
- Ind Tech Res Inst
- What technology area does this patent fall under?
- Primary CPC classification C08C19/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 01 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).