Weather-resistant water-swelling waterproof rubber sealing material and preparation method thereof

Abstract

The invention discloses a weather-resistant water-swelling waterproof rubber sealing material and a preparation method thereof. The weather-resistant water-swelling waterproof rubber sealing material consists of the following components in parts by weight: 60 parts of butyl rubber, 40 parts of modified nitrile rubber, 10-16 parts of bentonite-calcium carbonate microspheres, 6-10 parts of SAP resin, 3-5 parts of sodium polyacrylate, 2-6 parts of white carbon black, 1-3 parts of stearic acid, 1-5 parts of N-phenyl-beta-naphthylamine and 1-3 parts of dimethyl methacrylic acid gylcol ester. As butyl rubber, modified nitrile rubber and bentonite-calcium carbonate microspheres are compounded, and with the combination of active components of nano-zinc oxide, white carbon black and the like, the flowability and the plasticity of the water-swelling rubber can be improved, and the weather resistance and the processing property of the waterproof rubber sealing material are effectively improved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a water-swellable waterproof rubber sealing material with good weather resistance and a preparation method thereof. Background technique [0002] Water Swelling Rubber (WSR for short) is a new functional polymer material developed by Japan in the late 1970s. After absorbing water, it can expand to several times or even hundreds of times its own weight or volume. When it encounters water, it can absorb water to expand its volume and generate a large expansion pressure. Ability. The characteristics of water absorption and expansion make the material play a role of water-stop within the effective volume expansion range. Compared with traditional pressure sealing materials, it not only has the sealing effect of conventional water-stop materials, but also can effectively fill the gap when the building joint is deformed. It plays the role of stopping water with water. Water-absorbin...

AI Technical Summary

Problems solved by technology

The physical blending method can adjust the process formula according to the needs. The preparation process is simple, the source of raw materials is wide, the production cost is low, and the initial water absorption is rapid. Bad dispersion and poor compatibility are common in rubber. After soaking in water, the water-absorbing resin is easy to detach from the rubber matrix, and the expansion rate will decrease after repeated use, and its tensile strength will decrease with the increase of the expansion rate.