Complex solvent modified liquid polysulfide rubber and preparation method thereof

A liquid polysulfide rubber and solvent technology, applied in the field of polysulfide rubber, can solve the problems of product stability, limited promotion and use, failure to meet the requirements of industrial development, complex production process, etc., to overcome poor stability, 100% recovery rate, Reasonable effect of theoretical design

Active Publication Date: 2012-11-28
郑州裕昌建筑节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Complex solvent modified liquid polysulfide rubber and preparation method thereof
  • Complex solvent modified liquid polysulfide rubber and preparation method thereof
  • Complex solvent modified liquid polysulfide rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 10 parts by weight of polytetrahydrofuran ether glycol and add it to the reaction kettle, heat it to 95°C in an oil bath, and filter it under reduced pressure for 1.5h, then lower the temperature to room temperature, and add 2.5 parts by weight of toluene diisocyanate (TDI ), stirring and heating, from 60°C to 78°C at a rate of 5°C / h, and reacting for 3 hours to obtain a prepolymer;

[0032] (2) Add 1.1 parts by weight of mercaptobutanol and 10 parts by weight of a compound solvent composed of dibutyl phthalate and liquid paraffin in a weight ratio of 3:1 in the above-mentioned cooled reactor, add lauric acid after stirring The amount of dibutyltin oleate and dibutyltin laurate is 1 / 1000 of the weight of the prepolymer. After stirring for 8 minutes, heat to 92°C and react for 3.5 hours to obtain a compound solvent-modified polysulfide rubber.

Embodiment 2

[0034] (1) Weigh 11 parts by weight of polyoxypropylene propylene glycol ether and add it to the reaction kettle, heat it to 98° C. in an oil bath, and filter it under reduced pressure for 1.8 hours, then lower the temperature to room temperature, and add 2.5 parts by weight of hexamethylene diisocyanate ( HDI), stirring and heating, starting from 65°C at a rate of 5°C / h to 80°C, and reacting for 3.2 hours to obtain a prepolymer;

[0035] (2) Add 1 part by weight of 1,5-pentanedithiol and 9 parts by weight of dibutyl phthalate and butyl benzyl phthalate according to the weight ratio of 2: 1 composition of the compound solvent, after stirring, add dibutyltin dioleate, the amount of dibutyltin dioleate is 2 / 1000 of the weight of the prepolymer, stir for 9 minutes, heat to 95 ° C, and react for 3 hours to get the compound solvent Modified polysulfide rubber.

Embodiment 3

[0037] (1) Weigh 9.6 parts of polyoxypropylene glycerol ether and add it to the reaction kettle, heat it to 100°C in an oil bath, and filter it under reduced pressure for 2 hours, then lower the temperature to room temperature, and add 2.3 parts of diphenylmethane diisocyanate ( MDI), stirring and heating, starting from 65°C at 5°C / h to 82°C, and reacting for 3.5h to obtain a prepolymer;

[0038] (2) Add 1.1 parts by weight of mercaptopropionic acid and 10 parts by weight of a compound solvent composed of dibutyl phthalate and phthalic acid sulfonate in a weight ratio of 1:1 to the above-mentioned cooled reactor , after stirring, add dibutyltin sulfonic acid oleate, the amount of dibutyltin sulfonic acid oleate is 3 / 1000 of the weight of the prepolymer, after stirring for 10 minutes, heat to 89 ° C, and react for 4 hours to obtain compound solvent modified polysulfide rubber.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83C09J175/04C09K3/10
Inventor 刘绍文王敏灿刘应凡王国庆
Owner 郑州裕昌建筑节能科技有限公司
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