Low-smell plastic molding automobile instrument panel material and preparation method thereof

Abstract

The invention discloses a low-smell plastic molding automobile instrument panel material and a preparation method thereof. The plastic molding automobile instrument panel material comprises two layers, wherein the surface layer is a hydrophobic double-component in-mould paint layer which is capable of forming a film with certain thickness by the reaction of a hydrophobic polyurethane dispersion and an aliphatic curing agent; the film is 10-100 microns in thickness; the inner layer is a polyurethane layer which is formed by polymerizing amino polyether, polyether polyol, a chain extender, a crosslinking agent, a catalyst and the like with an isocyanate compound; the polyurethane layer is 0.5-5mm in thickness. When being used for preparing an instrument board, and particularly the parts, indifferent directions, of the instrument board, the material can be quickly cured, so that the flowing hanging problem can be avoided. Additionally, the instrument board prepared through the abovementioned material is reasonable in mechanical performance, and outstanding in surface performance and ageing resistance; the problem of explosion and breaking of a safety airbag of the vehicle in an accident can be reduced, and the safety of the vehicle is improved. The invention also discloses a preparation method of the instrument board material.

Description

technical field [0001] The invention relates to a plastic spraying material and a preparation method thereof, in particular to a low-odor spray molding automobile instrument panel material and a preparation method thereof. [0002] The invention relates to a plastic-sprayed automotive instrument panel material, the surface layer of which is a water-based two-component in-mold paint. While further improving the odor and VOC of the automotive interior material, the instrument panel is endowed with excellent surface properties, including wear resistance, and Solvent and weather resistance. Its inner layer is a polyurethane layer, which is formed by reacting a composition with polyether polyol as the main component and an aromatic isocyanate compound. The composition with polyether polyol as the main component contains amino polyether with extremely high activity , to improve the sag problem of sprayed polyurethane in the spraying process, or the problem of material performance d...

AI Technical Summary

Problems solved by technology

[0005] Patent CN 105820303 A uses highly branched and high hydroxyl value polyester polyols to prepare polyurethane instrument panels, and then highly branched and high hydroxyl value polyester polyols have high viscosity, which is not conducive to the processing and production of instrument panels, and polyester polyurethane The hydrolysis resistance of the material is poor; the patent CN 101591420 B has prepared the instrument panel material by using polyether polyol, but, during the spraying process, the instrument panel material has different directions and angles, which is prone to sagging, and over The use of multiple catalysts can affect the performance of the material

Moreover, the elongation at break of the material in this patent is too high, which is not conducive to the effective blasting of the airbag when the car encounters an accident, and cannot effectively protect the occupants.

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