The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 2021
Filed:
Sep. 14, 2018
Dow Global Technologies Llc, Midland, MI (US);
Pbbpolisur S.r.l., Buenos Aires, AR;
Surya Ssubramaniam, Richmond, VA (US);
Mehmet Demirors, Pearland, TX (US);
Teresa P. Karjala, Lake Jackson, TX (US);
Jorge C. Gomes, Sao Paulo, BR;
Guillermo A. Raimondi, Buenos Aires, AR;
Davidson Lütkenhaus, Sao Paulo, BR;
Marie De Luján Tricotti, Buenos Aires, AR;
Dow Global Technologies LLC, Midland, MI (US);
PBBPolisur S.R.L., Buenos Aires, AR;
Abstract
Provided is a method for increasing the melt strength and/or low shear viscosity of a polyethylene resin. The method includes: a) providing a polyethylene composition including the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a density ranging from 0.900 g/cmto 0.970 g/cm, a molecular weight distribution (Mw/Mn) ranging from 2.6 to 3.5, and from 0.10 to 0.27 vinyl groups per 1,000 total carbon atoms; b) providing a masterbatch composition including a free radical generator and a polyethylene resin, wherein the free radical generator has a half-life at 220° C. of less than 200 seconds, and a decomposition energy higher than −250 kJ/mol, and wherein the polyethylene resin has a density ranging from 0.900 g/cmto 0.970 g/cm, melt index ranging from 0.01 g/10 min to 100 g/10 min; and c) reacting the polyethylene composition with the masterbatch composition to form a modified polyethylene composition.