Mineral filled low-shrinkage modified polypropylene composite material and preparation method thereof

Abstract

The invention relates to a mineral filled low-shrinkage modified polypropylene composite material which belongs to the field of modified polypropylene composite materials and comprises the following ingredients in parts by weight: 40 to 85 polypropylene, 5 to 30 polyethylene, 5 to 20 elastic bodies, 5 to 30 mineral filler, 0.1 to 3 compatilizers and 0.1 to 3 accessory ingredients. The mineral filled low-shrinkage modified polypropylene composite material prepared by the invention has good mechanical property, ensures good apparent performance of the composite material and has lower shrinkage. In addition, the method is simple and feasible and can be popularized and applied in a large scale.

Description

technical field [0001] The invention belongs to the field of modified polypropylene composite materials, in particular to a mineral-filled low-shrinkage modified polypropylene composite material, in particular to a low-shrinkage modified polypropylene composite material suitable for manufacturing automobile bumpers and the like ; The present invention also relates to the preparation method of the modified polypropylene composite material. Background technique [0002] With the development of the automobile industry, polypropylene is widely used in automobiles due to its low density, good rigidity, flex resistance, chemical corrosion resistance, good insulation, and low temperature impact resistance and thermal aging properties after modification. interior and exterior accessories. [0003] Shrinkage control of polypropylene modified materials is an important aspect of polypropylene modification. Good shrinkage control is of great significance to the promotion and use of po...

AI Technical Summary

Problems solved by technology

At present, the most effective way to improve the shrinkage of polypropylene is to add glass fiber. The addition of glass fiber destroys the crystallinity of polypropylene and affects the shrinkage. More importantly, glass fiber limits the crystallization shrinkage of polypropylene.

However, after adding glass fibers, the apparent quality of the polypropylene material is significantly reduced, and the impact resistance of the material is also slightly insufficient.