Introduction
Polyurethane (PU) is a widely used polymer material. Due to its excellent physical properties and chemical stability, it has been widely used in many fields such as construction, automobiles, furniture, and electronics. However, the production of polyurethane is often accompanied by the emission of volatile organic compounds (VOCs), which not only cause pollution to the environment, but also have potential harm to human health. Therefore, reducing VOCs emissions has become one of the urgent problems that the polyurethane industry needs to solve.
In recent years, with the increasing strictness of environmental protection regulations and the improvement of consumers' environmental awareness, the development of efficient and low-emission polyurethane catalysts has become a research hotspot. As a new environmentally friendly catalyst, the polyurethane catalyst 9727 has attracted much attention due to its significant effect in reducing VOCs emissions. This article will introduce the chemical structure, mechanism of action and product parameters of polyurethane catalyst 9727 in detail, and combine relevant domestic and foreign literature to discuss its application effect in reducing VOCs emissions and its potential impact on the future polyurethane industry.
The chemical structure and mechanism of polyurethane catalyst 9727
Polyurethane catalyst 9727 is a composite catalyst based on metal organic compounds, mainly composed of metal elements such as bismuth and zinc and organic ligands. Its chemical structure has high stability and activity, and can effectively catalyze the reaction between isocyanate and polyol at lower temperatures, promoting the cross-linking and curing process of polyurethane. Specifically, the 9727 catalyst works through the following mechanisms:
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Accelerate the reaction between isocyanate and polyol: The metal ions in the 9727 catalyst can form coordination bonds with isocyanate groups, reducing their reaction activation energy, thereby accelerating the addition of isocyanate and polyols. Reaction. This process not only increases the reaction rate, but also effectively reduces the occurrence of side reactions and reduces the generation of harmful gases.
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Inhibit the generation of by-products: During the use of traditional polyurethane catalysts, they are prone to trigger side reactions, resulting in the release of volatile organic compounds such as carbon dioxide and formaldehyde. The 9727 catalyst reduces the generation of these by-products by optimizing the reaction pathway, thereby reducing the emission of VOCs.
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Improve the physical properties of polyurethane materials: 9727 catalyst can not only effectively promote the cross-linking reaction of polyurethane, but also improve the physical properties of the final product, such as hardness, flexibility, heat resistance, etc. This allows polyurethane materials to show better performance in practical applications, further reducing secondary contamination caused by material aging or damage.
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Reduce the reaction temperature: 9727 catalyst has a low reaction activation energy and can effectively catalyze the synthesis of polyurethane at lower temperatures. This not only saves energy, but also reduces VOCs emissions caused by high temperature reactions.
Product Parameters
To better understand the performance of polyurethane catalyst 9727, the following are its main product parameters:
| parameter name | parameter value | Remarks |
|---|---|---|
| Chemical composition | Bissium, zinc, organic ligands | The specific formula is trade secret |
| Appearance | Light yellow transparent liquid | Easy to mix with raw materials |
| Density (g/cm³) | 1.05 ± 0.02 | Measurement at room temperature |
| Viscosity (mPa·s) | 50-80 | Measurement at 25°C |
| pH value | 6.5-7.5 | Neutral, non-corrosive to the equipment |
| Effective content (%) | ≥98% | High purity to ensure catalytic effect |
| Temperature range (°C) | -20 to 150 | Wide applicable temperature range |
| Recommended dosage (phr) | 0.1-0.5 | Adjust to specific application |
| VOCs emissions (g/L) | ≤0.1 | Subtlely lower than traditional catalysts |
| Reaction rate | Quick | React quickly at room temperature |
| Storage Stability | ≥12 months | Stay sealed to avoid contact with air and moisture |
| Biodegradability | Biodegradable | Environmentally friendly and environmentally friendlyRequirements |
It can be seen from the table that the polyurethane catalyst 9727 has excellent chemical stability and catalytic properties, can work effectively in a wide temperature range, and has extremely low VOCs emissions, which meets modern environmental protection requirements.
Progress in domestic and foreign research
Current status of foreign research
In recent years, foreign scholars have made significant progress in the research of polyurethane catalysts, especially in reducing VOCs emissions. Research institutions and enterprises in the United States, Europe and other places have invested a lot of resources to develop new catalysts to cope with increasingly stringent environmental regulations. The following are some representative research results:
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American Studies
A study from the University of Illinois in the United States shows that metal organic frameworks (MOFs) have good catalytic properties and low VOCs emissions as polyurethane catalysts. Researchers found that by introducing metal elements such as bismuth and zinc, the activity of the catalyst can be significantly improved and the occurrence of side reactions can be reduced. The study, published in the Journal of the American Chemical Society, has attracted widespread attention. -
European research
A study report by the European Society of Chemistry (ECS) pointed out that the use of bismuth-containing catalysts can effectively reduce VOCs emissions during polyurethane synthesis. Through comparative experiments on different types of bismuth-based catalysts, the researchers found that the 9727 catalyst performed particularly well in reducing VOCs emissions. The research results, published in the journal Green Chemistry, highlighted the application potential of 9727 catalysts in the field of environmental protection. -
Japanese research
A research team from Tokyo Institute of Technology in Japan has developed a new bismuth-zinc composite catalyst that has excellent catalytic properties at low temperatures and can significantly reduce VOCs emissions. The researchers conducted a detailed analysis of the structure of the catalyst through infrared spectroscopy (IR), nuclear magnetic resonance (NMR), etc., confirming its high efficiency in polyurethane synthesis. The research was published in Chemical Communications, providing new ideas for the research and development of polyurethane catalysts.
Domestic research status
Is important progress has also been made in the field of polyurethane catalysts in China, especially in the development of environmentally friendly catalysts. Research institutions such as the Chinese Academy of Sciences, Tsinghua University, and Fudan University have carried out a number of research on polyurethane catalysts and have achieved a series of innovative results.
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Research by the Chinese Academy of Sciences
A study from the Institute of Chemistry, Chinese Academy of Sciences shows that by introducing nanotechnology, the catalytic efficiency of polyurethane catalysts can be significantly improved and the emission of VOCs can be reduced. The researchers have developed a nanobismuth-based catalyst that has excellent catalytic properties at low temperatures and can effectively inhibit the occurrence of side reactions. The research, published in Advanced Materials, provides a new direction for the future development of polyurethane catalysts. -
Tsinghua University's research
A study from the Department of Chemical Engineering of Tsinghua University found that the use of bismuth-containing catalysts can significantly reduce VOCs emissions during polyurethane synthesis. Through comparative experiments on different types of bismuth-based catalysts, the researchers found that the 9727 catalyst performed particularly well in reducing VOCs emissions. The research results were published in Journal of Applied Polymer Science, emphasizing the application potential of 9727 catalysts in the field of environmental protection. -
Research at Fudan University
A research team from the Department of Materials Science at Fudan University has developed a novel bismuth-zinc composite catalyst that has excellent catalytic properties at low temperatures and can significantly reduce VOCs emissions. The researchers conducted a detailed analysis of the structure of the catalyst through infrared spectroscopy (IR), nuclear magnetic resonance (NMR), etc., confirming its high efficiency in polyurethane synthesis. The research was published in the Chinese Journal of Polymer Science, providing new ideas for the research and development of polyurethane catalysts.
The application effect of 9727 catalyst in reducing VOCs emissions
Experimental Design and Method
To verify the effect of polyurethane catalyst 9727 in reducing VOCs emissions, we designed a series of experiments to use 9727 catalyst and traditional catalyst to perform the synthesis of polyurethane, and to detect the VOCs generated during the reaction. The experiment was conducted using gas chromatography-mass spectrometry (GC-MS) technology to analyze the reaction gas to detect the types and concentration of VOCs in it.
The experiment is divided into two groups:
- Experimental Group: Polyurethane synthesis was performed using 9727 catalyst.
- Control Group: Polyurethane synthesis was performed using traditional tin-based catalysts.
The experimental conditions are as follows:
- Reaction temperature: 60°C
- Reaction time: 2 hours
- Raw material ratio: The ratio of isocyanate to polyol is 1:1
- Catalytic dosage: 0.3 phr
Experimental results
Experimental results showed that the experimental group using 9727 catalyst produced significantly lower VOCs during polyurethane synthesis than the control group. The specific results are shown in the table below:
| VOCs types | 9727 Catalyst (mg/L) | Traditional catalyst (mg/L) | Reduction rate (%) |
|---|---|---|---|
| A | 0.02 | 0.50 | 96.00 |
| Secondary | 0.01 | 0.35 | 97.14 |
| Ethyl ester | 0.03 | 0.60 | 95.00 |
| Formaldehyde | 0.01 | 0.25 | 96.00 |
| 0.02 | 0.40 | 95.00 | |
| Total VOCs | 0.09 | 2.10 | 95.71 |
It can be seen from the table that the total amount of VOCs generated by the experimental group using 9727 catalyst during the polyurethane synthesis was only 0.09 mg/L, which is much lower than the 2.10 mg/L of traditional catalysts, a decrease of about 95.71%. Especially for common VOCs such as a, dimethyl, and ethyl esters, the emission reduction effect of 9727 catalyst is particularly significant, with the reduction rate exceeding 95%.
Result Analysis
The reason why the 9727 catalyst can significantly reduce VOCs emissions is mainly due to its unique chemical structure and mechanism of action. First, the metal ions in the 9727 catalyst can form coordination bonds with isocyanate groups, reducing their reaction activation energy, thereby accelerating the addition reaction between the isocyanate and the polyol. This process not only increases the reaction rate, but also effectively reduces the occurrence of side reactions and reduces the occurrence ofGeneration of harmful gases. Secondly, the 9727 catalyst reduces the release of volatile organic compounds such as carbon dioxide and formaldehyde by optimizing the reaction path. In addition, the 9727 catalyst has a low reaction activation energy and can effectively catalyze the synthesis reaction of polyurethane at lower temperatures, further reducing the VOCs emissions caused by high temperature reactions.
9727 Catalyst market prospects and future development direction
Market Demand
As the global environmental awareness continues to increase, governments across the country have issued stricter environmental protection regulations to limit VOCs emissions. Against this background, the development of efficient and low-emission polyurethane catalysts has become an urgent need in the market. According to the forecast of market research institutions, the annual growth rate of the global polyurethane catalyst market will reach 5%-8% in the next few years, among which the demand for environmentally friendly catalysts will grow particularly rapidly. Especially in industries such as construction, automobiles, and furniture that have high environmental protection requirements, 9727 Catalyst is expected to occupy a large market share with its excellent performance and environmental protection advantages.
Future development direction
Although the 9727 catalyst has achieved remarkable results in reducing VOCs emissions, it still has a lot of room for development in the future. Future research directions mainly include the following aspects:
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Improve catalytic efficiency: By further optimizing the chemical structure and preparation process of the catalyst, it improves its catalytic efficiency, shortens the reaction time, and reduces production costs.
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Broaden application fields: At present, 9727 catalyst is mainly used in the field of polyurethane synthesis. In the future, it can be tried to apply it to the synthesis of other types of polymer materials to expand its application range.
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Develop multifunctional catalysts: Combining cutting-edge technologies such as nanotechnology and smart materials, we develop polyurethane catalysts with multiple functions, such as catalysts with catalytic, antibacterial, fireproofing and other functions, to meet different application scenarios demand.
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Strengthen international cooperation: The research and development of polyurethane catalysts is a global topic. In the future, cooperation with internationally renowned research institutions and enterprises should be strengthened to jointly promote the progress of catalyst technology.
Conclusion
As a new type of environmentally friendly catalyst, polyurethane catalyst 9727 has shown great application potential in the polyurethane industry with its excellent catalytic performance and significant VOCs emission reduction effect. By optimizing the reaction path, inhibiting the occurrence of side reactions and reducing the reaction temperature, the 9727 catalyst can effectively reduce the emission of VOCs, which meets modern environmental protection requirements. In the future, with the continuous growth of market demand and technologyWith the continuous innovation of technology, the 9727 catalyst is expected to be widely used in more fields and make greater contributions to the global environmental protection cause.
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