I. Introduction:
Chlorine ether resin due to superior overall performance in the coatings industry and ink industry should
Used universally recognized. In particular, the production of some resins has been forced to stop production due to restrictions on environmental issues, and the prospects for the use of chlorine ether resins have become more promising.
Chlorine ether resin plays a very important role in the processing of composite inks because of its good compatibility and mixing capacity. As an excellent binder, it has an irreplaceable role in improving and improving the dispersibility, transferability, color wettability, and the like of the ink. Currently widely used in the country.
Chloroether resin has excellent binder properties due to the introduction of vinyl isobutyl ether, which can be used in coatings for air-drying coatings and other physical drying methods. Especially in the production of composite inks, as a base resin, its characteristics are more reflected.
A few years ago, the domestic chlorine ether resin mainly relied on imports. Due to factors such as price and transportation, the application of imported products in the country was subject to certain restrictions. At present, there are several companies in China that successfully developed and developed a chlorine ether resin product, and formed a certain sales in the market. Partially replaced imported products.
Second, some problems in the application of MP45 in composite ink products
Chlorine ether resin in the application of ink, mainly applied with plastic gravure composite ink
in production. The earliest was the introduction of the chloroether resin MP45 into the composite ink system by Japanese DIC Ink, together with CPP and chlorinated EVA as the base resin. It has now been widely promoted and applied.
Chloroether resin MP45 has excellent binder properties due to the introduction of vinyl isobutyl ether. To ensure that the ink in a variety of resins, pigments, fillers and other organic together, play a very good role in the bridge. In particular, high-quality composite inks are suitable for high-speed printing inks and have higher requirements for MP45. With the development of high-speed printing and shallow printing, higher requirements have been placed on the raw materials of inks. It is required that the raw materials, especially the resin products, have better transfer performance, wettability to color, and pitching strength requirements. Several indicators of the following MP45 indicators play a key role in ink production:
1, appearance:
The appearance of MP45 is a white fine powder. If the whiteness of the powder is not pure or even yellow, it indicates that the aging resistance of the resin powder is not stable, or there is a certain defect in the stability of the product itself.
2, dissolution properties:
Excellent chloroether resin, the solubility should be very good, fully dissolved in the solvent. The appearance of the solution should be colorless and transparent, and it is suitable for various solvents such as benzene, fat, and ketone as well as mixed solvents. The dissolution rate should be around 40 minutes without stirring.
The poor transparency of MP45 dissolution indicates that the resin must be insoluble or hardly soluble in solvents. It shows that there are some problems in the polymerization of the resin itself, which makes the distribution of the resin in the molecular structure or molecular weight unreasonable. Caused the poor solubility of the resin.
3, MP45 resin liquid changes
Good quality MP45, after dissolution, in addition to colorless and transparent, but also depends on its stability, whether there is stratification, precipitation and precipitation and other phenomena. In addition, there are problems such as viscosity change, darkening (yellow, even red, black). These problems will affect the quality and stability of ink products.
4, other properties:
MP45 quality, there are several aspects of the indicators can be verified. Such as the freezing test, the resin solution is frozen at a temperature of -15°C for 5-7 days to observe the change of the solution, whether there is a phenomenon such as precipitation, gel, and stratification; in case of a temperature test, the resin liquid is coated on the smooth test plate The surface (such as a clean glass plate) is 1-2 hours in an oven at a temperature of 100°C. Observe whether there are bubbles, the number of bubbles, whether there is cracking, enchantment, etc.; miscibility test, the MP45 solution and other The resin was mixed day and night, stirred evenly, and stored for more than 7 days to observe whether precipitation, delamination, and precipitation occurred. and many more. Can reflect the application performance and indicators of MP45. Of course, professional manufacturers have more standardized test instruments, standards, and methods. It is not introduced here.
5, the performance in ink
The most important role of MP45 in compound inks is to act as a binder. Therefore, the quality of MP45 plays an important role in the dispersion and wetting properties of composite inks. The intrinsic quality of the MP45 determines the dispersibility and transferability of the ink. This has a great relationship with the polymerization mechanism of the chlorinated resin, especially the initiation system. The technical core difficulty of the chlorine ether resin is the difficulty in the polymerization of vinyl chloride and ether. It is necessary to ensure that the molecular structure of the polymer of vinyl chloride and ether is reasonable, and the distribution of molecular weight must be reasonable. In this way, the quality and stability of the resin itself can be ensured and the dispersibility in the ink can be guaranteed. At the same time, the volatile content of the resin is also very important and will directly affect the wetting properties of the ink. There is also a good adaptability to the solvent, due to the trend of solvent-free benzene, requiring MP45 to be better in the solubility of other solvents such as lipids, if the dissolution effect in different solvents is very different, or even insoluble, it also shows that the resin There are certain problems with quality.
Therefore, the performance of high-grade composite inks in the printing industry must be good transfer performance, good wetting performance, high-speed printing, and quality assurance of printed materials. As one of the base resins, MP45, the quality of the ink has a great influence on the ink.
Third, Xuzhou Donghong Chemical Co., Ltd. chlorine ether resin production process profile:
There are currently several companies in the country producing vinyl ether resin products, but the polymerization process is different. There are suspension polymerizations and emulsion polymerizations. Xuzhou Donghong Chemical Co., Ltd. independently developed the production technology and technology of the chlorine ether resin. In view of the aforementioned problems in the application of inks, a process route combining emulsion polymerization and micro-suspension polymerization was adopted, and ASPENPLUS software was used to optimize various process parameters and parameters such as production process, material balance, and heat balance. At the same time, the formula system is strictly calculated and optimized. The quality of the chlorine ether resin has been greatly improved. The production process diagram is as follows:
Figure 1-1 Deliberate process flow of Xuzhou Donghong Chemical Co., Ltd.
At all stages of scientific research and production, our company strictly compares the products of foreign companies, including molecular structure, various properties and other aspects. The following is a graphical comparison of the molecular weight distribution and data
Figure 2-1 Molecular weight distribution of the chlorine ether resin of a foreign multinational corporation
Figure 2-2 Molecular weight distribution of the chlorine ether resin of Xuzhou Donghong Chemical Co., Ltd.
Figure 2-3 Comparison of molecular weight data between foreign companies and Donghong Chemical Co., Ltd.
Through analysis and comparison of the above data, it can be seen that the quality of the chlorine ether resin produced by Xuzhou Donghong Chemical Co., Ltd. is basically the same as that of a foreign multinational company. Intrinsic quality has basically reached the standard of imported products. It has also been approved by authoritative scientific research institutions and verified by some customers.
Masiwei brand chlorine ether resin produced by Xuzhou Donghong Chemical Co., Ltd. is willing to provide excellent services for the ink industry and contribute to the ink business of the motherland.