Method of production of ethylene-based polymer particles and stretch-molded article obtained from ethylene-based polymer particles
US-9181359-B2 · Nov 10, 2015 · US
Process of making modified metallocene catalyst, catalyst produced and use thereof
US9045569B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9045569-B2 |
| Application number | US-201213979541-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 12, 2012 |
| Priority date | Jan 14, 2011 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; provided however: (I) the titanium-containing metallocene compound is inactive or substantially inactive for the polymerization of olefins prior to or concurrently with the use of the catalyst system for olefin polymerization. Also disclosed are processes for producing the catalyst system and polyolefins having desirable combinations of properties, including melt index and molecular weight distribution, which properties are particularly desirable for the manufacture of polyolefin film products, especially LLDPE film A preferred catalyst comprises a zirconium or hafnium metal containing metallocene, an inactivated titanocene and a SiO2 support carrier.
First claim
Opening claim text (preview).
The invention claimed is: 1. An olefin polymerization catalyst or catalyst system comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization-active metallocene compound; (B) at least one titanium-containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one compound selected from the group consisting of: (c1) an o…
Assignees
Inventors
Classifications
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9045569B2 cover?
- Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; pr…
- Who is the assignee on this patent?
- Jensen Michael D, Elder Michael J, Singleton Andrew G, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification C08F4/76. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 02 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).