Sealing adhesive for cable joint box and preparation method thereof

Abstract

The invention discloses a sealing adhesive for a cable joint box and a preparation method thereof, and belongs to the technical field of preparation of the sealing adhesive. The sealing adhesive comprises organic silicone rubber, high-molecular weight polyisobutene, medium-molecular weight polyisobutene, low-molecular weight polyisobutylene, inorganic filler, an antioxidant, carbon black as a coloring agent and a mothproofing agent. The preparation method comprises the following steps of: S1. weighing: weighing raw materials; S2. kneading: adding the raw materials for kneading; S3. blending: blending the kneaded sizing materials; S4. extruding: extruding the blended sizing materials, and then cooling and cutting to prepare the sealing adhesive for the cable joint box. The sealing adhesive disclosed by the invention has the advantages of excellent binding property, filling property, sealing property, water resistance, high-low temperature resistance, acid resistance, alkali resistance, salt resistance and dielectric property. The preparation method disclosed by the invention has the characteristics of health, environmental friendliness, simple production process, no solvent, time and energy conservation, low cost and suitability for industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of sealant preparation, and in particular relates to a sealant for an optical cable joint box and a preparation method thereof. Background technique [0002] Under the background of the rapid development of my country's optical communication network, there are more and more types of optical fiber cables and their accessories. According to the different types of optical cables, the current optical cable splice closures are divided into outdoor optical cable splice closures, OPGW optical cable splice closures, submarine optical cable splice closures and miniature optical cable splice closures, etc.; , self-adhesive sealant is used for the sealing between the upper and lower boxes and between the optical cable and the box. At present, domestic sealants generally use butyl rubber as the main material of the sealant. Its high and low temperature resistance is poor, and it will deform when it is subjected to a la...

AI Technical Summary

Problems solved by technology

However, its mechanical properties are not very good, and it has been a key problem that has plagued technicians for a long time. It is easy to be affected by mechanical friction, collision, bending, water ingress and other unfavorable factors, resulting in damage to the silicone sealing strip, or even losing its effect. ; At the same time, because the optical cable is exposed to the atmosphere or buried in the ground, it is extremely susceptible to corrosion, especially the splice box part of the optical cable. Alkali and salt water, temperature resistance, and sealing silica gel with strong sealing ability are particularly important

[0005] After searching, as Chinese patent application number CN201110033120 discloses a kind of sealing rubber strip and its preparation method, the sealing rubber strip is composed of thermoplastic polymer elastomer and silane coupling agent, has good thermal adhesion, and plays a good role Sealing and protection; this method has the characteristics of simple process, high efficiency, and environmental protection; but there are still some deficiencies, such as the stability of the sealant, acid, alkali, salt, mechanical properties, etc. There is no comprehensive and systematic introduction, but it is only solved by research The hardness and tensile strength problems of the sealant have not completely solved the problems of the sealant in preparation, use, and later weather resistance.

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