Preparation method for solving problem about vulcanizing agent of being inflammable in silica gel mixing process

Abstract

The invention discloses a preparation method for solving the problem about a vulcanizing agent of being inflammable in the silica gel mixing process. The three following methods are adopted in the preparation process and are implemented at the same time, and include that first, the separation distance between every two adjacent feeding rollers in a mixing machine is controlled to range from 8 millimeters to 10 millimeters; second, the temperature of the rollers is controlled to be kept below 40 DEG C; and third, before the working procedure of adding the vulcanizing agent, the static electricity of the mixing machine is released, and a silica gel material is adopted for covering the scattered vulcanizing agent in a triangular bag or looping manner. According to the preparation method for solving the problem about a vulcanizing agent of being inflammable in the silica gel mixing process, because the operation manners of roller spacing adjustment, silica gel material covering and circulating water regulation are adopted, friction generated between the rollers of the mixing machine and silica gel is reduced, it is guaranteed that the vulcanizing agent is nonflammable in the silica gelmixing process, the requirements for the appearance of the silica gel material and the silica gel performance are guaranteed, and the requirements of clients are met.

Description

technical field [0001] The invention relates to the technical field of silica gel debonding, in particular to a preparation method for solving the problem of the flammability of a vulcanizing agent during silica gel decoction. Background technique [0002] At present, the spontaneous combustion phenomenon that occurs during the practice of silica gel is mainly due to the following reasons: [0003] 1) In the process of silica gel refining, the added vulcanizing agent bis-2-5 (special initiator for vinyl), under the action of repeated extrusion and shearing of the rollers of the mill, the decomposition products of vulcanizing agent bis-2-5 lead to the degradation of silicone rubber , Decompose flammable products U94V-1 and methane. Improper operation of the refining process, control of water temperature conditions, and inaccurate operation time can easily cause the chemical reaction between silica gel and vulcanizing agent to decompose flammable products U94V-1 and methane sp...

AI Technical Summary

Problems solved by technology

[0003] 1) In the process of silica gel refining, the added vulcanizing agent bis-2-5 (special initiator for vinyl), under the action of repeated extrusion and shearing of the rollers of the mill, the decomposition products of vulcanizing agent bis-2-5 lead to the degradation of silicone rubber , Decompose flammable products U94V-1 and methane. Improper operation of the refining process, control of water temperature conditions, and inaccurate operation time can easily cause the chemical reaction between silica gel and vulcanizing agent to decompose flammable products U94V-1 and methane spontaneous combustion

[0004] 2) The process of refining silica gel is prone to static electricity. Under the action of repeated extrusion and shearing of the rollers during the refining process, the molecular structure of the silica gel is gradually destroyed and decomposed, and the added vulcanizing agent reacts chemically with the refined silica gel. Decomposes to give flammable products, resulting in flammable

[0005] 3) The temperature of the drum is too high to help the vulcanizing agent chemically react with the silica gel that is being refined to decompose flammable products, resulting in flammable