Why multistage dilution is used in the later production process of resin?
The chemical composition of epoxy resin is the main component: phenolic resin; phenolic resin is composed of phenol formaldehyde resin, under the condition of the catalyst by neutralization and washing and made of the phenol and formaldehyde resin as the most important. It is also the earliest synthetic polymer which is still very important in the world.
Because of the different catalysts, they can be divided into two categories: thermosetting and thermoplastic. Phenolic resin has good acid resistance, mechanical properties, heat resistance, and is widely used in anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel manufacturing and other industries. NL curing agent is an efficient and low toxic curing agent for phenolic resin furan resin. The NL curing agent has low toxicity and basically no irritation. The resin is cured with high strength and good corrosion resistance. It is easy to use and easy to use and has a long storage period.
The reference formula of phenolic resin curing agent NL alcohol quartz powder phenolic mastic - 56 - 10150 - 1000 - 56 200 glass steel putty 1000 - 10120 - 200 - 1510 - 100108 glass steel material at 1520 DEG NL dosage was 8%, 1 hours of initial setting, 30 minutes: pay attention to the use of formula of phenolic resin and furan resin NL curing agent to cure, high requirements for packing requirements, acid packing standard. Inferior fillings contain calcium carbonate, which react with acid curing agents to produce bubbles, which affect the quality of the products and may cause the resin to be unstable. Packaging and storage of 10Kg, 25Kg plastic drums. Airtight storage at room temperature. Can long-term storage, more than one year retest qualified, can continue to use.
The NL curing agent has low toxicity and basically no irritation. The resin is cured with high strength and good corrosion resistance. It is easy to use and easy to use and has a long storage period. This product is suitable for curing thermosetting phenolic resin and furan resin at room temperature. Used to prepare phenolic resin and furan cement; glass fiber reinforced plastic products; bonding of pens, brushes, bamboo and wood products; also used as a room temperature curing agent for casting resins. The quality index of appearance of dark grey liquid relative density (20 C) 1.16 + 0.01 (viscosity coating -4,25 C). 20 - 30 of total acidity (H2SO4)%18 + 2 free acid (H2SO4)%3 5 storage period for more than one year (closed storage) application of phenolic resin and furan resin, the amount of NL the curing agent is generally in the range 512%. When the ambient temperature is 20 degrees centigrade, the dosage of NL curing agent of 2130 phenolic resin is about 8%, and the dosage of NL curing agent can be adjusted with the temperature.