Slush molding PVC (Poly Vinyl Chloride) material for instrument panel covering and preparation method of slush molding PVC material

Abstract

The invention discloses a slush molding PVC (Poly Vinyl Chloride) material for an instrument panel covering and a preparation method of the slush molding PVC material. The slush molding PVC material consists of the following ingredients in parts by weight: 48-53 parts of polrvinyl chloride bulk polymerization resin, 23-27 parts of plasticizer, 3-8 parts of epoxy-ester compounds, 5-6 parts of heat stabilizer, 0.2-1.0 part of compound light stabilizer, 0.3-1.0 part of antioxidant, 3-5 parts of silicone oil, 0.2-0.3 parts of carbon black and 3-5 parts of dispersing agent. Antalkali is introduced in auxiliaries and used for neutralizing amino groups in polyurethane, the reaction of PVC with the amino groups is prevented and the light aging problem of the slush molding PVC surface cover is solved; meanwhile, the problem of poor temperature tolerance of the PVC is solved by virtue of the excellent temperature tolerance of silicone oil; and the dispersing agent is introduced into the formula of powder, so that fluffy powder material can be conveniently transformed to sand-shaped powder material and then the slush molding of powder is facilitated.

Description

technical field [0001] The invention relates to a PVC material and a preparation method thereof, in particular to a slush-molded PVC material for instrument panel skin and a preparation method thereof. Background technique [0002] The instrument panel is an important functional and decorative part of the car. The quality and grade of the instrument panel is one of the important indicators for people to evaluate the quality of a car. When choosing a dashboard, performance, functionality, manufacturing cost, and decorative style should be considered. The instrument panels of high-end cars tend to use powder slush plastic skin. Slush molding is a stress-free process, so the slush plastic skin is not easy to crack, has stable dimensions, uniform thickness, clear skin texture, good hand feeling, and is closer to natural leather. In terms of aging resistance, slush-plastic skins show obvious advantages, and are superior to deep-drawn skins in terms of heat resistance, fogging,...

AI Technical Summary

Problems solved by technology

Patents ZL02110787.4 and ZL200510016921.8 report adding a certain proportion of various additives to PVC powder to prepare slush molding powder by dry mixing. Patents EP0312367, JP02209941 and JP07149983 also report adding certain additives to PVC powder. The slush molding powder was prepared by dry mixing with a variety of additives in different proportions, but the slush molding powder they made did not solve the problems of later molding, such as low temperature impact, soft polyurethane foam material in the instrument panel and slush PVC The poor compatibility of the skin, etc., is due to the poor low temperature resistance of the PVC material, and the amino group in the polyurethane foam material is easy to react with the PVC in the slush PVC powder, which greatly reduces the anti-aging performance of the PVC skin