Novel polysulfide rubber and preparation thereof

Abstract

The invention relates to a novel thiocol and the preparation method, which belongs to the technical field of the thiocol. The thiocol adopts a special graft process technology, wherein end sulphydryl is grafted to the macromolecular chain end of polyurethane, the novel thiocol with polyurethane as the main chain and end group as sulphydryl is formed after the end capping, the preparation material comprises alcohols, vulcabonds, end thioglycolic alcohols, modifier, catalyst, plasticizer and reactive diluent; the preparation method is divided into two steps, and the two steps adopt addition polymerization reaction, the first step is the reaction of synthesizing polyurethane performed polymer, the second step is the reaction of grafting the end thioglycolic alcohols to the polyurethane performed polymer, by adopting the special catalyzed technology, the difficult problem of the selectivity chemical reaction between end thioglycolic and end hydroxyl and polyurethane chain end isocyanato is creatively solved, the performance of the novel thiocol is excellent, and the novel thiocol combines advantages of the polyurethane rubber and the thiocol and denies disadvantages of the polyurethane rubber and the thiocol, therefore the novel thiocol is a water proofing material which is urgently required to perform research and development and asked for demand, and the novel thiocol and the preparation method are worthy to be adopted and promoted.

Description

1. Technical field [0001] The novel polysulfide rubber disclosed by the invention and its preparation method belong to the technical field of polysulfide rubber, specifically relate to a novel polysulfide rubber, and also relate to a preparation method of the polysulfide rubber. [0002] 2. Background technology [0003] Waterproof treatment in the construction field is an important aspect of building construction. Waterproof treatment, such as widely used in construction, municipal, subway, tunnel and water conservancy projects, such as waterproof sealing of deformation joints such as concrete expansion and settlement. There are two commonly used materials for waterproofing: polyurethane rubber and polysulfide rubber, each of which has its own advantages and disadvantages. The advantages of polysulfide rubber are: high strength, good elasticity, and low water vapor transmission rate. Its disadvantages are: it is not resistant to aging, the elongation rate drops significant...

AI Technical Summary

Problems solved by technology

Its disadvantages are: it is not resistant to aging, the elongation rate drops significantly under long-term sunlight exposure, it is prone to wrinkling, cracking, debonding, fading, etc., and it is not well bonded to the cement surface

The disadvantage is that the end of the molecular chain is a very active isocyanate group, which is not easy to store and requires high construction conditions.

However, this method has a large amount of toxic waste water discharged, which pollutes the environment and is not suitable for industrial production.

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