Andrew J Singleton

US Patent:

20130289227, Oct 31, 2013

Filed:

Jan 12, 2012

Appl. No.:

13/979541

Inventors:

Michael D. Jensen - Laurel MD, US
Michael J. Elder - Baltimore MD, US
Andrew G. Singleton - Ellicott City MD, US
Stephen R. Schmidt - Silver Spring MD, US
Patrick J. Kerwin - Grasonville MD, US
Fengjun Hua - Ellicott City MD, US

Assignee:

W.R. GRACE & CO.-CONN - Columbia MD

International Classification:

C08F 4/76

US Classification:

526114, 502129, 502113, 502104

Abstract:

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.

US Patent:

20180142047, May 24, 2018

Filed:

May 9, 2016

Appl. No.:

15/572658

Inventors:

- Columbia MD, US
John Robert McCauley - Finksburg MD, US
Andrew G. Singleton - Ellicott City MD, US
Demetrius Michos - Clarksville MD, US

Assignee:

W. R. Grace & Co.-Conn. - Columbia MD

International Classification:

C08F 10/02

Abstract:

Catalyst support-activator for olefin polymerization catalysts, and processes for making, the support-activator comprising an intercalated, modified and calcined smectite clay comprising (a) pillars comprising aluminum and optionally: (i) at least one rare earth or lanthanide group metal; or (ii) at least one rare earth or lanthanide group metal and gallium; and (b) at least one ion-exchanged metal ion selected from the group consisting of aluminum, barium, beryllium, calcium, cerium, cesium, copper, chromium, gadolinium, gallium, germanium, hafnium, holmium, iron (II and III), lanthanum, lithium, magnesium, manganese, neodymium, potassium, praseodymium, rubidium, samarium, silver, selenium, sodium, strontium, tellurium, terbium, thallium, thorium, tin, titanium, uranium, ytterbium, yttrium, zinc and zirconium. The pillared clay exhibits a basal dspacing of: (A) 9 to 18 angstroms; or (B) equal to or greater than about 18.5 angstroms. Use of the modified clays, with metallocene catalyst precursor components, provides active olefin polymerization catalysts, preferably in the substantial absence of aluminoxanes or boron-containing compounds.

US Patent:

20180142048, May 24, 2018

Filed:

May 9, 2016

Appl. No.:

15/572675

Inventors:

- Columbia MD, US
John Robert McCauley - Finksburg MD, US
Andrew G. Singleton - Ellicott City MD, US
Demetrius Michos - Clarksville MD, US

Assignee:

W. R. Grace & Co.-Conn. - Columbia MD

International Classification:

C08F 10/02

Abstract:

An intercalated, modified and calcined smectite clay comprising (a) pillars comprising aluminum and: (i) at least one rare earth or lanthanide group metal; or (ii) at least one rare earth or lanthanide group metal and gallium; and (b) at least one ion-exchanged metal selected from the group consisting of aluminum, barium, beryllium, calcium, cerium, cesium, copper, chromium, gadolinium, gallium, germanium, hafnium, holmium, iron (II and III), lanthanum, lithium, magnesium, manganese, neodymium, potassium, praseodymium, rubidium, samarium, silver, selenium, sodium, strontium, tellurium, terbium, thallium, thorium, tin, titanium, uranium, ytterbium, yttrium, zinc and zirconium; wherein the clay is characterized by a basal dspacing equal to or greater than about 18.5 angstroms; and processes for making. The modified clays are suitably used as catalyst support-activators and when used in combination with metallocene catalyst precursor components, can provide active catalysts for polymerizing at least one olefin, preferably in the substantial absence of aluminoxanes or boron-containing compounds.