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:
Nov. 27, 2012
Filed:
Nov. 26, 2008
Franz Ruemer, Gusen, AT;
Franz Ruemer, Gusen, AT;
Borealis Technology Oy, Porvoo, FI;
Abstract
The invention relates to a novel process for producing coloured polypropylene compositions having a high content of β-modification, wherein polypropylene is melt blended with at least one inorganic pigment and at least one β-nucleating agent, wherein a1) polypropylene is melt blended with at least one inorganic pigment or with a first concentrate comprising the at least one inorganic pigment to obtain a coloured polypropylene and a2) the coloured polypropylene is melt blended with at least one β-nucleating agent or with a second concentrate comprising the at least one β-nucleating agent to obtain the coloured β-nucleated polypropylene composition or b1) polypropylene is melt blended with at least one β-nucleating agent or with a second concentrate comprising the at least one β-nucleating agent to obtain a β-nucleated polypropylene and b2) the β-nucleated polypropylene is melt blended with at least one inorganic pigment or with a first concentrate comprising the at least one inorganic pigment to obtain the coloured β-nucleated polypropylene composition or c) a third concentrate is produced by melt blending a first concentrate comprising the at least one inorganic pigment and a second concentrate comprising the at least one β-nucleating agent and the polypropylene is melt blended with the third concentrate to produce the coloured β-nucleated polypropylene composition or d) a first concentrate comprising the at least one inorganic pigment and a second concentrate comprising the at least one β-nucleating agent are melt blended with the polypropylene to obtain the coloured β-nucleated polypropylene composition.