Guangzhou Longkai Chemical Co., Ltd.
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Application and Basic Knowledge of Titanate Coupling Agent
Author:LongKom  Time:2013-7-16

Since last year, the market price of titanate coupling agent has been falling all the way, from 50,000 yuan (ton price, the same below) at the beginning of the year to more than 30,000 yuan at present, and this year there is a continuing downward trend. Titanate coupling agent is one of the four main categories of organic silicone materials (silicone oil, silicone rubber, silicone resin, titanate coupling agent). It has many characteristics, such as variety, complex structure, low dosage, remarkable effect and wide application. It has become an indispensable auxiliary and material in modern silicone, organic polymer, composite materials and related high-tech fields.

What is titanate coupling agent? Polyether 210, isophorone diisocyanate (IPDI) as the main raw material, dimethylolpropionic acid (DMPA) as the hydrophilic chain extender, aminotinate coupling agent as chain extender, a series of silicone modified waterborne polyurethane dispersions were synthesized in different proportions. The main effect of titanate coupling agent on the stability of waterborne polyurethane emulsion is the resistance and thermal effect of emulsion and water resistant particles. The results showed that with the increase of the mass fraction of titanate coupling agent, the particle size of emulsion increased, the dispersion stability was good, the water resistance of paint film increased obviously, the heat resistance of film increased obviously, and the crosslinking reaction; the ATR infrared film showed that the concentration of titanate coupling agent increased in the urea linkage system.

Polyether 210, industrial products, Shanghai Gaoqiao Petrochemical Plant III, vacuum drying before use; IPDI, industrial products, Rodin; DMPA, industrial products, Sweden Berstorp; butanediol (BD), analytical purity, Shanghai reagent factory; ethylenediamine (EA), acetone, triethylamine (TEA), analytical purity, Guangzhou reagent factory; Titanate coupling agent, deionized water and industrial grade.

The dehydration of 210 isophorone diisocyanate and polyether was measured in a mixer, reflux condenser and thermometer flask. The reaction time was increased to 90 C. Then DMPA and BD chains were added to extend to the end point of the reaction. The polyurethane prepolymer was prepared by adjusting the viscosity according to the need and adding acetone reaction process. Pre-neutralization, water cooling, high speed dispersion, titanate coupling agent (ethylenediamine or titanate coupling agent), acetone vacuum, silicone modified waterborne polyurethane dispersion.

(1) Solid content of latex: determined according to gb1725-79.
(2) emulsion particle size: the sample is diluted to a certain concentration and measured at room temperature with Malvin AutoSizer.
(3) Membrane water resistance: The film will be completely dried to 20 mm x 20 mm square, weighed M0, soaked in water at room temperature, then dried with filter paper, weighed again after surface water or solvent, and calculated absorption rate:
Water absorption =(m-m0)/ M0*100%
(4) Weight loss rate of membrane: M1 film dried to constant weight in oven was used to measure water absorption and calculate weight loss rate.
Weight loss rate=(m0-m1)/M0*100%
(5) Infrared film: Brookvector33 was determined at room temperature using ATR accessories.

(6) Polarization of Zeissaxiolab Polarization Microscope in Germany

Microscope, program control temperature.
Development of chemical reagents will increase self-sufficiency

With the rapid development of modern automobile, new energy, aerospace and the continuous improvement of people's living standards, the demand for new materials in chemical reagent industry in China is increasing year by year. It is estimated that by 2015, the demand for chemical reagent engineering plastics will be about 3.6 million tons, the demand for special rubber will be about 2.5 million tons, the demand for silicone will be about 1 million tons, the demand for organic fluorine will be 750,000-800,000 tons, the demand for high performance fibers will be about 40,000 tons, and the demand for biomass materials will be about 140,000 tons.

Although chemical reagents are expected to have good market prospects, the self-sufficiency rate of new chemical materials in China is only 65%, especially the self-sufficiency rate of new petrochemical materials such as engineering plastics and special rubber is only about 33%, and foreign-funded enterprises account for a large proportion of the output of Engineering plastics. The new chemical materials produced in China are mainly low-grade products, while the middle and high-grade products mainly rely on imports, and there is a lack of special products for market segmentation. In China, the research and development of new chemical reagent materials is weak and the level of engineering is lower. As a result, the technology of some main products such as polyformaldehyde, polycarbonate, butyl rubber has not been broken through for a long time.

In order to improve the comprehensive ability of chemical reagents, during the 12th Five-Year Plan period, the new material industry of chemical reagents will improve its independent innovation ability by combining production, teaching and research. By the end of the Twelfth Five-Year Plan, the expected total output value will reach 400 billion yuan, with an average annual growth rate of more than 15%. R&D investment has increased significantly. The proportion of R&D investment in key new material enterprises in sales revenue has reached 5%. A number of R&D and public service platforms for new material engineering technology have been built. The comprehensive support ability of products has been increased to 75%, and the industrialization and scale of key varieties such as carbon fiber, butyl rubber and polycarbonate have been realized.

It is known that among the high performance chemical reagent fibers, 3-5 enterprises will be selected in the field of carbon fibers to carry out continuous technological research and development, develop a series of brand carbon fibers, improve single-line production capacity, and realize stable operation of 1000-ton units; break through key technologies to realize the nationalization of complete sets of equipment; strengthen the comprehensive utilization of heat energy and waste gas treatment, so as to achieve energy conservation, consumption reduction and clean-up. Cleaner production; develop carbon fiber composite materials for industrial use, strive to achieve a number of upstream and downstream industrial chain supporting carbon fiber industrial clusters. In the aramid field, we should expand the production scale of meta-aramid, break through the bottleneck of para-aramid industrialization, and expand its application in the field of honeycomb structure and insulating paper. By 2015, the production capacity will reach 10,000-20,000 tons. Ultra-high molecular weight polyethylene collar