Complex solvent modified liquid polysulfide rubber and preparation method thereof

Abstract

The invention provides complex solvent modified liquid polysulfide rubber which is characterized in that the structural formula of the complex solvent modified liquid polysulfide rubber is shown at the upper right part (I). In the structural formula, n is equal to an integer between 1 and 8; X and X' are O or S; R1 and R1' are shown as (II) at the upper right part or -[-OCH2CH2CH2CH2-]m- or other polyether and polyester chain segments, wherein m is equal to an integer between 20 and 50; R2 and R2' are aromatic hydrocarbons, aliphatic hydrocarbons or lactone ring alkyls; and R3 and R3' are aliphatic alkyls, the carbon number of which, is between 2 and 11 or are main frameworks of the liquid polysulfide rubber [HS-R3(or R3')-SH] which contains sulfhydryl and is sold in the market. The complex solvent modified liquid polysulfide rubber has the advantages of good stability, no toxicity, no pollution, good elasticity, high temperature resistance, low temperature resistance, ultraviolet aging resistance, good oil resistance and the like. The preparation process has reasonable technical theoretical design and simple practical operation. Compared with the same industry, the invention also has the advantages of simple technology, environment protection, energy saving, reasonable cost, no discharge of the three wastes, no influence on environment and the like, and the recovery rate is 100%.

Description

technical field [0001] The invention belongs to the technical field of polysulfide rubber, and relates to a compound solvent modified liquid polysulfide rubber and a preparation method of the modified polysulfide rubber. Background technique [0002] In recent years, with the modernization of urban buildings and the improvement of living environment in my country, energy-saving and sound-insulating insulating glass has gradually entered thousands of households. It is an indispensable product for people's daily life. Especially in 1997, the Ministry of Construction issued that all buildings must use insulating After the notification and regulation of glass, the development of insulating glass has sprung up. In 2000, there were 5,000 manufacturers of insulating glass in the country, and the annual use in buildings was 3 million square meters. The amount of polysulfide glue used was less than 1,000 tons. There are nearly 100 million square meters, 200,000 manufacturers, and the u...

AI Technical Summary

Problems solved by technology

In addition to the complex production process and serious environmental pollution, polysulfide rubber products are expensive and currently only a few companies in the world, such as Toray in Japan, Wacker in Germany and Morton in the United States, control and monopolize the global market, which also limits liquid polysulfide products. Important factors for the development of insulating glass product markets at home and abroad

After the mid-1990s, a few companies such as the United States and Japan proposed and began to explore the production process of modified polysulfide rubber products in the laboratory, but their promotion and use in the market have been limited due to the stability of the product.

In recent years, with the development of building energy saving, urban drinking water, urban sewage treatment and airport bridge technology, various properties of sealing materials are required to meet their development needs, but neither polysulfide rubber nor polyurethane rubber can meet the needs of future market development. Demand, so new alternative materials are being developed at home and abroad

Moreover, according to market research and literature retrieval, all development units at home and abroad adopt a multi-step synthesis operation process of organic solvents. This process is complex and involves a large amount of solvents, which seriously pollutes the environment and does not meet the current industrial development requirements.

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