Process for the Production of Xylenes
US-2015376086-A1 · Dec 31, 2015 · US
Compositions and method of inhibiting polymerization of vinyl-aryl monomers
US8969498B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8969498-B2 |
| Application number | US-201113811574-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 27, 2011 |
| Priority date | Aug 2, 2010 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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The invention generally relates to a method of inhibiting polymerization of vinyl aryl monomers, a process for increasing number average molecular weight of a polystyrene, and to an inhibitor composition useful therein.
First claim
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What is claimed is: 1. An inhibitor composition comprising a mixture of a vinyl-aryl monomer and a polymerization-inhibiting effective amount of a substituted amidine of formula (I): or a prototropic tautomer thereof, Wherein: Z is 1,3-(C 3 or C 7 )hydrocarbylene or 1,3-(C 2 -C 6 )heterohydrocarbylene such that ring (r) is a six-membered ring; benzo-fused substituted si…
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Frequently asked questions
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- What does patent US8969498B2 cover?
- The invention generally relates to a method of inhibiting polymerization of vinyl aryl monomers, a process for increasing number average molecular weight of a polystyrene, and to an inhibitor composition useful therein.
- Who is the assignee on this patent?
- Kendall Nathan T, Kar Kishore K, Mcadon Mark H, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification C07C7/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 03 2015 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).