High surface tension polypropylene composite material and preparation method thereof

Abstract

The invention discloses a high surface tension polypropylene composite material and a preparation method thereof, the composite material is prepared from the following components by weight: 43-83 parts of polypropylene, 2-6 parts of polyethylene, 5-15 parts of nylon 6, 3-15 parts of a flexibilizer, 5-15 parts of an inorganic filler, 2-6 parts of a polar modifier, 0.5-1.0 part of an antioxidant, 0.1-0.5 part of a processing aid, and 0.8-1.5 parts of stearic acid ethoxyamide. The polar modifier is at least one of a methyl methacrylate grafted ethylene-1-octylene copolymer and a glycidyl methacrylate grafted ethylene-1-octylene copolymer. The added polar modifier has better compatibility with the nylon 6, increases the phase interface thickness, and has more significant toughening effect on the nylon 6; by adding a weak-polarity assistant stearic acid ethoxy amide, the polarity of the modified polypropylene material is improved in an auxiliary manner, and the surface tension of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high surface tension polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a crystalline polymer with a regular structure, usually in the form of white pellets or powder, and is an odorless, non-toxic, light-weight thermoplastic resin; it has the advantages of easy processing, impact strength, flexibility and electrical Good insulation and other characteristics, widely used in automotive interior and exterior decoration materials, such as bumpers, fenders, side skirts and other exterior decoration parts need to be painted on the surface, many of these parts are used by many OEMs are polypropylene materials , but the surface tension of polypropylene itself is low, and the surface needs to be flame treated before spraying to improve its sprayability. [0003] The Chinese patent discloses a met...

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Problems solved by technology

The surface tension agent described is PP-g-AA, PP-g-MAH, EAA or CHA, and the modified material is PA6. This patent increases the surface tension of the PP material from below 30dyn / cm to 34dyn / cm, although the surface The tension has been improved, but the improvement effect is not significant; Chinese patent discloses a polypropylene composition with higher surface tension and its preparation method

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