A kind of melamine modified resin glue for flax chipboard and its preparation method
A technology of melamine and modified resin, which is applied in the field of resin preparation, can solve the problems of no supply of melamine-urea-formaldehyde resin, high activity of melamine-formaldehyde resin, cracking, etc., and achieve a stable and easy-to-control reaction process and coordinated glue seam color Good resistance and strong resistance to boiling water
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Embodiment 1
[0034] A melamine-modified resin glue for flax chipboard, the parts by weight of each component are as follows: 12300 parts of formaldehyde, 1050 parts of melamine, 40 parts of diethylene glycol, 30 parts of caprolactam and 700 parts of water.
[0035] The preparation method is as follows: mix formaldehyde with water, adjust the pH value to about 9.0, add melamine and diethylene glycol in turn, heat up, keep warm at 85°C-87°C, measure pH between 8.3-9.0, and measure in 10°C water After the fog point, after the fog point, measure the water mist multiple, when the water mist multiple reaches 1:3, cool down; when the temperature drops to 40°C, add caprolactam, adjust the pH to about 9.0, the water soluble multiple is 1:2, and keep warm 15 minutes; stop cooling down, discharge the ingredients, that is to say.
[0036] The resin technical index of embodiment 1 is as follows:
[0037] Table 1
[0038] Exterior
Colorless and transparent, without impurities
Solid...
Embodiment 2
[0045] A melamine-modified resin glue for flax chipboard, the parts by weight of each component are as follows: 1600 parts of formaldehyde, 1300 parts of melamine, 80 parts of diethylene glycol, 80 parts of caprolactam and 1000 parts of water.
[0046] The preparation method is as follows: mix formaldehyde with water, adjust the pH value to about 9.0, add melamine and diethylene glycol in turn, heat up, keep warm at 85°C-87°C, measure pH between 8.3-9.0, and measure fog in 10°C water Point, after the fog point, measure the water mist multiple, when the water mist multiple reaches 1:3, cool down; when the temperature drops to 42°C, add caprolactam, adjust the pH to about 9.0, the water soluble multiple is 1:4, and keep warm for 20 Minutes; stop cooling, discharge, that is.
[0047] The resin technical index of embodiment 2 is as follows:
[0048] Table 2
[0049] Exterior
Colorless and transparent, without impurities
Solid content (%)
60-65
Visco...
Embodiment 3
[0056] A melamine-modified resin glue for flax chipboard, the parts by weight of each component are as follows: 1500 parts of formaldehyde, 1100 parts of melamine, 50 parts of diethylene glycol, 60 parts of caprolactam and 800 parts of water.
[0057] Preferably, the parts by weight of each component are as follows: 1230 parts of formaldehyde, 1050 parts of melamine, 40 parts of diethylene glycol, 30 parts of caprolactam, and 700 parts of water.
[0058] The preparation method is as follows: mix formaldehyde with water, adjust the pH value to about 9.0, add melamine and diethylene glycol in turn, heat up, keep warm at 85°C-87°C, measure pH between 8.3-9.0, and measure fog in 10°C water Point, after the fog point, measure the water mist multiple, when the water mist multiple reaches 1:3, cool down; when the temperature drops to 40°C, add caprolactam, adjust the pH to about 9.0, the water soluble multiple is 1:2, and keep warm for 15 Minutes; stop cooling, discharge, that is.
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