Fiber modified water-expandable waterproof rubber sealing material and preparation method thereof

Abstract

The invention provides a fiber modified water-expandable waterproof rubber sealing material and a preparation method thereof. The fiber modified water-expandable waterproof rubber sealing material is prepared from, by weight, 100 parts of nitrile rubber, 8-16 parts of short fibers, 15-25 parts of bentonite-calcium carbonate micro-spheres, 10-16 parts of SAP resin, 8-12 parts of silica, 1-3 parts of stearic acid, 4-6 parts of N-phenyl-beta-naphthylamine and 1-3 parts of a promoter D. The water absorption speed of the sealing material is improved by combining the short fibers and the water absorption component (the bentonite-calcium carbonate micro-spheres and the SAP resin) in use. In addition, the modified water-expandable waterproof rubber sealing material has higher strength and chemical stability and excellent water absorption and stop properties under the synergistic effect of the sealing material.

Description

technical field

[0001] The invention relates to the field of polymer sealing materials, in particular to a fiber-modified water-swellable waterproof rubber sealing material 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-absorbing swel...