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:
Jun. 03, 2014
Filed:
Sep. 09, 2008
Klaus Besser, Gutenberg, DE;
Jochen Gerecke, Halle/Saale, DE;
Lutz Haeussler, Halle/Saale, DE;
Bianka Leitner, Schkopau, DE;
Inno Rapthel, Halle/Saale, DE;
Klaus Besser, Gutenberg, DE;
Jochen Gerecke, Halle/Saale, DE;
Lutz Haeussler, Halle/Saale, DE;
Bianka Leitner, Schkopau, DE;
Inno Rapthel, Halle/Saale, DE;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Procedure for the manufacture of carboxylated ethylene polymer blends, in which in a 1step, in a fluid mixing reactor, to 100 pbw of a particulate ethylene polymer—chosen from among ethylene homopolymers (HDPE, LDPE) and/or linear ethylene copolymers with 2 to ≦20 wt.-% polymerized-in C-olefin units (LLDPE, EOP), with a melt-flow rate MFR (190° C./2.16 kg)≧20 g/10 min—are added 0.05-15 pbw of a α,β-ethylenically unsaturated mono and/or dicarboxylic acid or its anhydride (carboxyl monomer), or a monomer mixture containing at least one carboxyl monomer and 0.01-10 pbw of a radical initiator or initiator mixture, and graft-polymerizing at reaction temperatures of 30-120° C., over a reaction time of 5-120 min and subsequently, in a 2step, reacting a mixture continuously fed into a reaction extruder of 100 pbw of the modified ethylene polymer obtained in the 1solid phase step, 150-4,000 pbw of an ethylene polymer or polymer blend with a melt flow rate MFR (190° C., 2.16 kg)<20 g/10 min, as well as 0-4,000 pbw of an olefinic elastomer, at temperatures of 160-260° C. and continuously removing the graft-modified ethylene polymer blend that has a degree of carboxylation of 0.05-1 wt.-%. The products obtained are especially suitable as adhesion promoters and/or adhesives for numerous substrates, preferably on and between metallic surfaces.