A kind of addition type silica gel and its preparation method and application

Abstract

The invention discloses addition silica gel capable of being used for a silica gel reprinting model of a slush mold, and a preparation method and an application of the addition silica gel. A phenomenon of non-solidification of the silica gel when the silica gel reprinting model is fabricated on the surface of polyvinyl chloride skin containing heavy metal pollution is avoided. The addition silicagel comprises the following ingredients in parts by weight: 100 parts of mixture of vinyl silicone oil and hydrogen silicone oil, 20-30 parts of vinyl MQ (mono-quad) liquid silicon resin, 12-14 partsof gas phase white carbon black, 5-10 parts of viscosity modifier, 2-3 parts of platinum catalyst and 0.7-0.9 parts of inhibitor. The preparation method comprises the steps of mixing and stirring theingredients at a temperature of 23-25 DEG C, and a speed of 2500r / min for 5min. The invention provides the application of the addition silica gel in fabricating the silica gel reprinting model of theslush mold of an automobile instrument board. The addition silica gel is high in solidification speed and low in cost, and the preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of addition-type silica gel preparation, and in particular relates to addition-type silica gel and its preparation method and application. Background technique [0002] Automobile instrument panel slush molding molds are generally used to produce soft skin products for automobile instrument panels. The production process of slush molding molds includes the production of silicone replica models, the purpose of which is to accurately copy and transfer the patterns on the surface of the wrapped leather models. In the process of making the silicone reprint model, if the PVC skin of the skin model contains N, P, S, Bi and other elements, since N, P, and S contain lone pairs of electrons, they can interact with the d of platinum. The electrons in the orbit combine to form a strong adsorption bond, which leads to the formation of compounds between the platinum element and N, P, and S, resulting in a change in the f...

AI Technical Summary

Problems solved by technology

However, this silicone primer is directly applied to the surface of the leather model with a pattern, which will affect the simulation rate of the pattern to a certain extent, and directly spraying on the surface also needs to control the amount of primer , if the amount is too much or too little, it will affect the curing effect of silica gel

CN105345963A discloses a method for making a silicone reprint mold for an automobile instrument panel slush mold, which is to spray an additive pretreatment agent on the surface of the patterned skin. This method can only be used for polyvinyl chloride skins that contain less elements that cause poisoning.