News Details
Water glass coating crosslinking agent
2017-5-3 16:26:14
Water glass coating crosslinking agent. A good bonding effect of sodium silicate and cement base material were very solid strength, film hardness, resistance to aging, not burning, smokeless, properly packing resistant to high temperature of 1000 ℃. The sodium silicate coated electrostatic dust has little attachment, and mold is difficult to grow.
Because of the sodium silicate has the advantages of organic materials have no, and rich in resources, low price, therefore, as a new kind of inorganic binding material again become the object of study.
The crosslinking technology and application of sodium glass coating. Sodium silicate molecular formula: Na2O nSiO2 + mH2O, its structural formula: Na - O ` the SiO - OeNa + mH2O. N is the modulus, and the higher the value, the better the water resistance, the worse the bonding. N is an important technical indicator of sodium water glass, and its calculation method: n = SiO2aNa2Oa 2oa times 1.032, 1.032 is the ratio of SiO2 to Na2O molecular weight.
Another technical indicators of sodium silicate is a d or ° baume degree B. The relationship between them is ° B = 145-145 - d. Sodium silicate of architectural coatings used on n. 3, B 40 °, is advisable.
As you can see from the formula, the sodium glass is soluble in water because the Na + at the ends of the molecule can be dissociated. Water resistance is the greatest drawback of sodium glass as an inorganic binder.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
For more than half a century, researchers have done a lot of work to improve the water resistance of sodium glass. The production and development of sodium silicate coatings are closely related to the cross-linking technology.
Currently, the crosslinking technology of sodium glass coatings can be divided into two categories. One is heated crosslinking, and the other is crosslinking. The water evaporates in the coating under the temperature of the heated crosslinking, and the silicate anions in the water glass are assembled into the membrane, and the Na + is distributed in the coating without rules. In the coating, there are more Si -oh bonds, where the water is soluble and the coating is damaged.
When the temperature rises, the sodium silicate water evaporated, and Si - dehydration association between OH keys, formation of Si - O - Si key, this is a very good three-dimensional structure for water resistance coating. The Na + is in the closed state of the three-dimensional membrane, which is insoluble in water. Crosslinking temperature rose above 200 ℃, can get excellent resistance to water film.
The membrane process can be used for the following reactions: Na2O? NSiO2 + (2 n + 1) + nSi H2O2NaOH nSi (OH) 4 (OH) 4 [Si (OH) 4] n - 2 nh2osioosiosiosi heating crosslinking can only be limited to building decorative coating processing, for building a large area of the surface coating is difficult to work.
With the development of the construction industry, the coating variety keeps increasing, and in the small and medium-sized cities and rural villages, the internal wall painting is still mainly in the middle and low block. Therefore, it is useful to study the modification techniques of low price sodium glass coatings. Abroad due to the dense, high-rise buildings, coupled with the lack of oil resources, inorganic coating is also brought to the attention of the people, so the crosslinking of sodium silicate coating technology is very necessary.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Because of the sodium silicate has the advantages of organic materials have no, and rich in resources, low price, therefore, as a new kind of inorganic binding material again become the object of study.
The crosslinking technology and application of sodium glass coating. Sodium silicate molecular formula: Na2O nSiO2 + mH2O, its structural formula: Na - O ` the SiO - OeNa + mH2O. N is the modulus, and the higher the value, the better the water resistance, the worse the bonding. N is an important technical indicator of sodium water glass, and its calculation method: n = SiO2aNa2Oa 2oa times 1.032, 1.032 is the ratio of SiO2 to Na2O molecular weight.
Another technical indicators of sodium silicate is a d or ° baume degree B. The relationship between them is ° B = 145-145 - d. Sodium silicate of architectural coatings used on n. 3, B 40 °, is advisable.
As you can see from the formula, the sodium glass is soluble in water because the Na + at the ends of the molecule can be dissociated. Water resistance is the greatest drawback of sodium glass as an inorganic binder.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
For more than half a century, researchers have done a lot of work to improve the water resistance of sodium glass. The production and development of sodium silicate coatings are closely related to the cross-linking technology.
Currently, the crosslinking technology of sodium glass coatings can be divided into two categories. One is heated crosslinking, and the other is crosslinking. The water evaporates in the coating under the temperature of the heated crosslinking, and the silicate anions in the water glass are assembled into the membrane, and the Na + is distributed in the coating without rules. In the coating, there are more Si -oh bonds, where the water is soluble and the coating is damaged.
When the temperature rises, the sodium silicate water evaporated, and Si - dehydration association between OH keys, formation of Si - O - Si key, this is a very good three-dimensional structure for water resistance coating. The Na + is in the closed state of the three-dimensional membrane, which is insoluble in water. Crosslinking temperature rose above 200 ℃, can get excellent resistance to water film.
The membrane process can be used for the following reactions: Na2O? NSiO2 + (2 n + 1) + nSi H2O2NaOH nSi (OH) 4 (OH) 4 [Si (OH) 4] n - 2 nh2osioosiosiosi heating crosslinking can only be limited to building decorative coating processing, for building a large area of the surface coating is difficult to work.
With the development of the construction industry, the coating variety keeps increasing, and in the small and medium-sized cities and rural villages, the internal wall painting is still mainly in the middle and low block. Therefore, it is useful to study the modification techniques of low price sodium glass coatings. Abroad due to the dense, high-rise buildings, coupled with the lack of oil resources, inorganic coating is also brought to the attention of the people, so the crosslinking of sodium silicate coating technology is very necessary.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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