17/06/2023
Introduction To The Characteristics Of Transparent Liquid
Transparent liquid silica gel can be used for coating, dipping and pouring. For example, hydroxy-terminated polydimethylsiloxane with a viscosity of 0.07~50 Pa·s/25°C, using methyl vinyl bispyrrolidone silane as a chain extender, and organic peroxides such as dibenzoyl peroxide , 25-Dimethyldi-5-di-tert-butylperoxyhexane is a vulcanizing agent, this kind of rubber has good fluidity and low viscosity, and the chain growth reaction occurs at the same time during the vulcanization process, so high molecular weight elastomers can be obtained , Has good physical and mechanical properties. The chain extender methyl vinyl bispyrrolidone silane can be obtained by the reaction of pyrrolidone and methyl vinyl dichlorosilane in the presence of triethylamine. The product is easily hydrolyzed, so it needs to be stored in a dry and closed container. The pyrrolidone of this compound The group can slowly react with the terminal hydroxyl group in the polydimethylsiloxane at room temperature, and the reaction speed increases with the increase of temperature.
Characteristics of transparent liquid silicone:
1. Excellent demoulding performance
2. If necessary, it can be heated to accelerate curing
3. The semi-transparent appearance allows precise cutting from the block mold according to the dividing line
4. Very low shrinkage and good dimensional stability
5. Medium to high hardness (40 Shore A), but elastic and tough
6. Can be used for high temperature casting
Liquid silicone is a relatively solid high-temperature vulcanized silicone rubber. It is a liquid glue. It has good fluidity and rapid vulcanization. It is safer and safer than other silicones. It can fully meet food-grade requirements. The injection machine process is very simple (no manual processes are required, such as batching, rubber mixing, cutting, arranged in the high temperature glue process, only one worker can bring the product), and the product precision is high (all manual procedures before molding) are all replaced by the machine) , High output (A/B glue mixed for a few seconds at a certain temperature), saving manpower, saving electricity, saving materials and many other advantages, can produce all-high temperature rubber products.