Hydro-expansive waterproof rubber sealing material containing polyaspartic acid and preparing method thereof

Abstract

The invention provides a hydro-expansive waterproof rubber sealing material containing polyaspartic acid and a preparing method thereof. The sealing material is prepared from, by weight, 100 parts of nitrile rubber containing polyaspartic acid, 20-30 parts of polyaspartic acid, 15-25 parts of bentonite-calcium carbonate microspheres, 6-12 parts of SAP resin, 8-12 parts of white carbon black, 3-5 parts of styrene / maleic anhydride copolymer, 4-6 parts of N-phenyl-beta-naphthylamine and 5-10 parts of polyethylene glycol. Polyaspartic acid and bentonite-calcium carbonate microspheres are added and combined with SAP resin to serve as the water absorbing component, the formula of hydro-expansive waterproof rubber is optimized, and the obtained hydro-expansive waterproof rubber sealing material has the advantages of being excellent in water absorption performance, high in water absorption rate, high in repeated water absorption capacity and excellent in mechanical property, has good environmental compatibility and achieves the purpose of environment protection.

Description

technical field [0001] The invention relates to the field of polymer sealing materials, in particular to a water-swellable waterproof rubber sealing material containing polyaspartic acid 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-...

AI Technical Summary

Problems solved by technology

Rubber constitutes the matrix of WSR, and its elasticity and strength will affect the mechanical properties of WSR. At the same time, due to the difference in structure and properties, traditional water-absorbing rubber generally has the problem of poor dispersion of hydrophilic substances in the rubber matrix. It is easy to fall off from the rubber network, thus affecting the water swelling performance of WSR and its tightness

Most of the currently prepared WSR materials have shortcomings such as low water absorption rate, slow water absorption speed, obvious decline in mechanical properties after water absorption, and poor repeated water absorption capacity.