Solid silica gel

Abstract

The present invention belongs to the field of polymer technology. The solid silica gel consists of: base polymer 50-70 wt%, crosslinking agent 0.8-3 wt%, stuffing 25-45 wt%, catalyst 2-4 wt%, processing agent 4-12 wt%, demolding agent 0.01-0.3 wt%, yellow resisting agent 0.01-0.3 wt% and diluent 0-30 wt%. The solid silica gel is formed in once sulfurizing at low temperature and has simplified mold manufacture, low cost, no low molecular matter exhaust during sulfurizing, less shrinkage, high chemical stability and excellent acid and alkali resistance.

Description

Technical field: [0001] The invention belongs to the technical field of polymer compounds, in particular to a solid silica gel. Background technique: [0002] In the prior art, the traditional silicone rubber is generally prepared by compression molding, that is, the traditional peroxide is used at high temperature to form it through a hydraulic molding machine. The molding method is generally to cut the rubber material into a certain shape, fill it into the mold cavity, put it between the heated flat vulcanizing machines after the mold is closed, and pressurize and heat the rubber material according to the specified process to vulcanize the rubber material. However, the products made by the traditional secondary vulcanization molding method have the following disadvantages: [0003] (1) The vulcanization temperature of traditional silicone rubber is relatively high, generally higher than 120°C, and its vulcanization temperature range is narrow, which limits its application...

AI Technical Summary

Problems solved by technology

[0003] (1) The vulcanization temperature of traditional silicone rubber is relatively high, generally higher than 120°C, and its vulcanization temperature range is narrow, which limits its application

[0004] (2) When vulcanizing traditional silicone rubber, generally the vulcanization time required is longer than that of the present invention, especially for thick objects, the time required is longer, and its use efficiency is lower

[0006] (4) Traditional silicone products are generally vulcanized by peroxide, which not only has an odor, but also has a little residue, which is not conducive to the application in medicine or food

[0007] To sum up, for traditional silicone products, not only the preparation process is complicated and the preparation time is lengthy, but also there are many restrictions and inconveniences in its application.