Medium density polyethylene compositions
US-9840570-B2 · Dec 12, 2017 · US
Process for preparing isobutene homopolymers or copolymers
US9458262B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9458262-B2 |
| Application number | US-201213655839-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 19, 2012 |
| Priority date | Oct 21, 2011 |
| Publication date | Oct 4, 2016 |
| Grant date | Oct 4, 2016 |
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Abstract
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Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which can be obtained by protic acid-catalyzed reaction of at least one C 1 -C 12 -hydrocarbyl alcohol with at least one aldehyde or ketone having from 1 to 12 carbon atoms.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for preparing an isobutene homopolymer or copolymer, the process comprising: reacting at least one C 1 -C 12 -hydrocarbyl alcohol with at least one aldehyde or ketone comprising from 1 to 12 carbon atoms in a protic acid-catalyzed reaction to obtain at least one full acetal, drying the at least one full acetal to obtain at least one dried full acetal, and polymerizing a reaction mixture comprising isobutene or an isobutene-comprising mono…
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- C08F10/10Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9458262B2 cover?
- Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which ca…
- Who is the assignee on this patent?
- Koenig Hannah Maria, Urban Rainer, Muehlbach Klaus, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification C08F10/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 04 2016 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).