Preparation method of waterproof and flame-retardant adhesive for fiberboards
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A flame retardant adhesive and fiberboard technology, applied in the field of fiberboard, can solve the problems of hindering the popularization and application of water-based polyurethane adhesives, poor water resistance, etc., and achieve the effects of increasing interface compatibility, good hydrophobicity, and improving water resistance.
Active Publication Date: 2019-09-13
阜阳大可新材料股份有限公司
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Problems solved by technology
However, the water-based polyurethane adhesives on the market still have the defect of poor water resis
Method used
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Embodiment 1
[0025] A preparation method of a waterproof flame-retardant adhesive for fiberboard, characterized in that it comprises the following steps, and the following raw materials are calculated in parts by weight:
[0026] (1) Hydrophobic modification method of acid-etched halloysite nanotubes:
[0027] After ultrasonically dispersing 1 part of acid-etched halloysite nanotubes in dry toluene for 30 minutes, connect it to the reflux device, blow in nitrogen gas, heat up to 120°C with mechanical stirring, add 0.02 parts of hexamethyldisilazane dropwise, and reflux reaction After 5 hours, centrifuge, wash 3 times with toluene, and dry in a drying oven at 120°C for 2 hours to obtain hydrophobically modified acid-etched halloysite nanotubes;
[0028] Among them, acid etching pretreatment of halloysite nanotubes: 1 part of halloysite nanotubes was pretreated in a muffle furnace at 400°C for 4h, then added to a sulfuric acid solution with a concentration of 2mol / L, and heated at 80°C Cond...
Embodiment 2
[0036] A preparation method of a waterproof flame-retardant adhesive for fiberboard, characterized in that it comprises the following steps, and the following raw materials are calculated in parts by weight:
[0037] (1) Hydrophobic modification method of acid-etched halloysite nanotubes:
[0038] After ultrasonically dispersing 2 parts of acid-etched halloysite nanotubes in dry toluene for 40 minutes, connect to the reflux device, blow in nitrogen gas, heat up to 125°C with mechanical stirring, drop 0.04 parts of hexamethyldisilazane, and reflux reaction After 4 hours, centrifuge, wash with toluene 5 times, and dry in a drying oven at 125°C for 1 hour to obtain hydrophobically modified acid-etched halloysite nanotubes;
[0039] Among them, acid etching pretreatment of halloysite nanotubes: 2 parts of halloysite nanotubes were pretreated in a muffle furnace at 410°C for 3h, then added to a sulfuric acid solution with a concentration of 2mol / L, and heated at 85°C Condensate an...
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Abstract
The invention discloses a preparation method of a waterproof and flame-retardant adhesive for fiberboards. The preparation method comprises the following steps: performing ultrasonic dispersion on acid-etched halloysite nanotubes in dry toluene, connecting the nanotubes into a reflux unit, introducing nitrogen, performing mechanical stirring and heating, dropping hexamethyl-disilazane, carrying out a reflux reaction, performing centrifuging, washing with the toluene, and performing drying in a drying oven so as to obtain hydrophobic modified acid-etched halloysite nanotubes; adding the obtained hydrophobic modified acid-etched halloysite nanotubes into deionized water, adding a waterborne polyurethane adhesive, a modifier and a dispersing agent, and performing ultrasonic dispersion so as to obtain a castor oil-halloysite nanotube modified waterborne polyurethane adhesive; adding amidinourea phosphate and pentaerythritol octahydrogen tetraphosphate into the deionized water, performing magnetic stirring, adding a melamine urea-formaldehyde resin, continuously performing stirring, mixing the previous materials with the obtained castor oil-halloysite nanotube modified waterborne polyurethane adhesive, a dispersing agent, a wetting agent and an antifoaming agent, and performing full stirring and uniform mixing so as to obtain the waterproof and flame-retardant adhesive.
Description
technical field [0001] The invention belongs to the field of fiberboards, and in particular relates to a preparation method of a waterproof and flame-retardant adhesive for fiberboards. Background technique [0002] With the improvement of people's living standards, people's demand for various new materials with unique properties is also increasing, and two or more different types of materials are compounded, assembled and hybridized at the nanometer scale to produce materials with unique properties. Nanocomposite materials or hybrid materials with new structures and properties are an important way to prepare new materials. Halloysite nanotube is a pure natural silicate mineral material, which has the same perfect hollow tubular structure as carbon nanotube, and has the natural advantages of low cost, high strength and high heat resistance. [0003] In recent years, with the improvement of my country's environmental protection regulations, water-based polyurethane adhesives...
Claims
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