News Details
Cold pressed paint crosslinking agent
2017-7-28 11:46:45
Cold pressed paint crosslinking agent
Effect of cold pressure coating crosslinking agent on pH value of UF resin. According to different combination of UF resin o and cold pressure crosslinking agent o and the different amount of formaldehyde capture agent A, the pH value of the normal UF resin was measured. The pH value increases with the decrease of the mixture of the cold pressure crosslinking agent o and UF resin o. At the same time, the pH value increases with the addition of formaldehyde capture agent A, but is smaller than the normal UF resin. The pH value.
This is because the acid in the cold - pressure crosslinking agent is working. In cold press type crosslinking agent components, PVAc emulsion in weak acid (pH value for 5 ~ 6), additives are acidic salt, cold press type crosslinking agent and ratio of UF resin o o is smaller, the acid is the role of the smaller, the greater the pH value of natural.
If the wet strength test is to be carried out, after soaking 3h in the water of (30? 1) e, and then soaking in the water of (20? 1) e for 10 min, the compression shear strength test will be carried out immediately.
At the same time, in the same proportion of cold pressure crosslinking agent o and UF resin o, the amount of formaldehyde capture agent A also affects the pH value. Formaldehyde capture agent A itself is alkaline, its dosage increases, the pH value increases accordingly.
Effect of cold compressive crosslinking agent on the crosslinking time of UF resin. According to different combination of UF resin o and cold pressure crosslinking agent o, and different amounts of formaldehyde capture agent A, the crosslinking time was measured, and normal UF resin was also measured. Cross-linking time.
Cross-linking time with composite crosslinking agent and ratio of UF resin o o decrease gradually increase, at the same time, the crosslinking time also increased with the increase of dosage of formaldehyde capture agent A increases, but less than ordinary UF resin? Cross-linking time.
This is because the crosslinking reaction of UF resin depends on the pH value of the medium and the structure and composition of the resin itself, and its crosslinking speed is proportional to the concentration of hydrogen ions. The crosslinking speed increases with the pH value of the resin, the higher the pH value, the slower the crosslinking speed and the longer the crosslinking time.
Chinese name: Diethyl toluene diamine(DETDA)
Effect of cold pressure coating crosslinking agent on pH value of UF resin. According to different combination of UF resin o and cold pressure crosslinking agent o and the different amount of formaldehyde capture agent A, the pH value of the normal UF resin was measured. The pH value increases with the decrease of the mixture of the cold pressure crosslinking agent o and UF resin o. At the same time, the pH value increases with the addition of formaldehyde capture agent A, but is smaller than the normal UF resin. The pH value.
This is because the acid in the cold - pressure crosslinking agent is working. In cold press type crosslinking agent components, PVAc emulsion in weak acid (pH value for 5 ~ 6), additives are acidic salt, cold press type crosslinking agent and ratio of UF resin o o is smaller, the acid is the role of the smaller, the greater the pH value of natural.
If the wet strength test is to be carried out, after soaking 3h in the water of (30? 1) e, and then soaking in the water of (20? 1) e for 10 min, the compression shear strength test will be carried out immediately.
At the same time, in the same proportion of cold pressure crosslinking agent o and UF resin o, the amount of formaldehyde capture agent A also affects the pH value. Formaldehyde capture agent A itself is alkaline, its dosage increases, the pH value increases accordingly.
Effect of cold compressive crosslinking agent on the crosslinking time of UF resin. According to different combination of UF resin o and cold pressure crosslinking agent o, and different amounts of formaldehyde capture agent A, the crosslinking time was measured, and normal UF resin was also measured. Cross-linking time.
Cross-linking time with composite crosslinking agent and ratio of UF resin o o decrease gradually increase, at the same time, the crosslinking time also increased with the increase of dosage of formaldehyde capture agent A increases, but less than ordinary UF resin? Cross-linking time.
This is because the crosslinking reaction of UF resin depends on the pH value of the medium and the structure and composition of the resin itself, and its crosslinking speed is proportional to the concentration of hydrogen ions. The crosslinking speed increases with the pH value of the resin, the higher the pH value, the slower the crosslinking speed and the longer the crosslinking time.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ 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).
The pH value increases with the decrease of the ratio of the cold compressive crosslinking agent o and UF resin o, and increases with the increase of the amount of formaldehyde capture agent A. The pH value increases, the crosslinking speed becomes slower, the crosslinking time increases.
Cold pressing type crosslinking agent of UF resin adhesive strength o according to the UF resin and the influence of cold pressing different crosslinking agent o cooperate as well as the amount of formaldehyde catching agent used in A different, measured its bonding strength, but also have the ordinary UF resin? Bonding strength.
The overall change trend of bonding strength decreased with the decrease of the ratio of the cold compressive crosslinking agent o and UF resin o. Formaldehyde capture agent in A dosage of 0% and 30%, namely the formaldehyde capture agent ABPVAc = 0 b100 and formaldehyde capture agent ABPVAc = 30 b100, appeared two peak, high bonding strength, and when A dosage of 0% formaldehyde capture agent, oBo = 20 b100, dry strength and wet strength of UF resin has reached the peak.
This is because: after the UF resin crosslinking couplet body structure, into insoluble not molten state, has good water resistance and high bonding strength, but brittle, aging, and its low initial viscosity, permeability is strong, easy to form transparent glue; PVAc emulsion is a kind of thermoplastic resin. After crosslinking, the molecule still has a linear structure, easy to dissolve and easy to melt, and the permeability is poor. It is not easy to cause penetration, and the film has a tenacity and little internal stress.
In the process of crosslinking, UF resin and hydroxymethyl of PVAc polyvinyl alcohol in the condensation to form the crosslinked shape structure, so as to improve the water resistance, adhesive ability, at the same time of PVAc thermoplastic and improved UF brittleness, reduce the internal stress of the rubber, the elastic rubber was improved, so as to improve the durability of the glue.
In addition, non-ionic surfactants play a good role in crosslinking and improve bonding strength.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The pH value increases with the decrease of the ratio of the cold compressive crosslinking agent o and UF resin o, and increases with the increase of the amount of formaldehyde capture agent A. The pH value increases, the crosslinking speed becomes slower, the crosslinking time increases.
Cold pressing type crosslinking agent of UF resin adhesive strength o according to the UF resin and the influence of cold pressing different crosslinking agent o cooperate as well as the amount of formaldehyde catching agent used in A different, measured its bonding strength, but also have the ordinary UF resin? Bonding strength.
The overall change trend of bonding strength decreased with the decrease of the ratio of the cold compressive crosslinking agent o and UF resin o. Formaldehyde capture agent in A dosage of 0% and 30%, namely the formaldehyde capture agent ABPVAc = 0 b100 and formaldehyde capture agent ABPVAc = 30 b100, appeared two peak, high bonding strength, and when A dosage of 0% formaldehyde capture agent, oBo = 20 b100, dry strength and wet strength of UF resin has reached the peak.
This is because: after the UF resin crosslinking couplet body structure, into insoluble not molten state, has good water resistance and high bonding strength, but brittle, aging, and its low initial viscosity, permeability is strong, easy to form transparent glue; PVAc emulsion is a kind of thermoplastic resin. After crosslinking, the molecule still has a linear structure, easy to dissolve and easy to melt, and the permeability is poor. It is not easy to cause penetration, and the film has a tenacity and little internal stress.
In the process of crosslinking, UF resin and hydroxymethyl of PVAc polyvinyl alcohol in the condensation to form the crosslinked shape structure, so as to improve the water resistance, adhesive ability, at the same time of PVAc thermoplastic and improved UF brittleness, reduce the internal stress of the rubber, the elastic rubber was improved, so as to improve the durability of the glue.
In addition, non-ionic surfactants play a good role in crosslinking and improve bonding strength.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian