David E Horst

US Patent:

7956109, Jun 7, 2011

Filed:

Aug 31, 2005

Appl. No.:

11/661450

Inventors:

Michael Roth - Lautertal, DE
Peter Nesvadba - Marly, CH
David E. Horst - Danbury CT, US

Assignee:

BASF SE - Ludwigshafen

International Classification:

C08K 5/34
C08K 5/3435
C08K 5/36
C08K 5/372

US Classification:

524 99, 524102, 524157, 524392

Abstract:

The invention relates to novel composition comprising hydroxylamine esters and thio compounds, which are suitable for lowering the molecular weight of polypropylene, propylene copolymers or polypropylene blends and result in an excellent degradation performance at temperatures below 220 C.

US Patent:

8168725, May 1, 2012

Filed:

May 2, 2011

Appl. No.:

13/098557

Inventors:

Michael Roth - Lautertal, DE
Peter Nesvadba - Marly, CH
David E. Horst - Danbury CT, US

Assignee:

BASF SE - Ludwigshafen

International Classification:

C08F 8/34
C08L 23/00
C09K 3/00
C08K 5/34
C08K 5/3435
C08K 5/42
C08K 5/36
C08G 73/10

US Classification:

5253339, 525240, 25218217, 524 99, 524102, 524157, 524392, 526351

Abstract:

The invention relates to novel composition comprising hydroxylamine esters and thio compounds, which are suitable for lowering the molecular weight of polypropylene, propylene copolymers or polypropylene blends and result in an excellent degradation performance at temperatures below 220 C.

US Patent:

20070200272, Aug 30, 2007

Filed:

Feb 20, 2007

Appl. No.:

11/708943

Inventors:

David Horst - Danbury CT, US
Michael Roth - Lautertal, DE
Peter Nesvadba - Marly, CH

International Classification:

B29C 47/78

US Classification:

264211240, 264349000, 525375000, 525376000, 525387000, 525333700

Abstract:

Disclosed is a method for viscosity breaking of a polypropylene polymer, a polypropylene copolymer or a polypropylene polymer blend, which process comprises adding a chain transfer agent and an initiator to a polypropylene polymer, polypropylene copolymer or polypropylene polymer blend and heating the resultant composition. The chain transfer agent has a Cs value of greater than or equal to about 0.04 as measured in ethylene polymerization at 130 C. The initiator is for example an organic or inorganic peroxide, a carbon based radical generator, a bis azo compound, a stable nitroxyl compound, a sterically hindered NO-acyl compound or a sterically hindered alkoxyamine compound.