Rigid polypropylene composition for primerless painting
A technology of polypropylene composition and polypropylene homopolymer, which is applied in the application field of paint failure, and can solve problems such as high wear rate and lack of paint adhesion
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[0237] As regards the preparation of the polypropylene homopolymer (PP-H1 ) reference is made to the above description provided for the polypropylene matrix (M) of the heterophasic propylene copolymer (HPP), ie the polypropylene homopolymer (PP-H2).
[0238] Mineral filler (F)
[0239] In addition to the polymer component, the polymer composition according to the present invention is also contained in the range of 20.0 to 40.0 wt%, and preferably in the range of 25.0 to 35.0 wt%, based on the total weight of the polymer composition mineral filler (F). Another requirement of the present invention is that the mineral filler (F) is selected from the group consisting of talc, wollastonite, kaolin and mica.
[0240] In one embodiment of the invention, the mineral filler (F) is talc.
[0241]The average particle size d50 of the mineral filler (F) is preferably in the range of 0.5-20.0 μm, more preferably in the range of 0.5-15.0 μm, still more preferably in the range of 0.75-10.0 ...
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[0287] A. Measurement method
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