Cationic waterborne polyurethane resin for wallpaper glue
A water-based polyurethane and cationic technology, applied in the field of compositions, can solve problems such as being unsuitable for large-scale industrial production, complex production processes, and great human injury, and achieve the effects of excellent physical and chemical properties, simple construction process, and reduced construction procedures.
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Embodiment 1
[0026] Embodiment 1 A cationic water-based polyurethane resin for wallpaper glue, the water-based polyurethane resin includes the following raw materials in parts by weight: polyol 70g; polyisocyanate 50g; first chain extender 10g; second chain extender 3g; salt forming Dose 2.5g.
[0027] Among them: polyol refers to polycaprolactone polyol with a molecular weight of 1000~3000. The polyisocyanate is toluene diisocyanate. The first chain extender refers to ethylene glycol. The second chain extender refers to diethanolamine. The salt forming agent refers to lactic acid.
[0028] The preparation method of the cationic water-based polyurethane resin for wallpaper glue, comprises the following steps:
[0029] (1) Weighing according to the proportion;
[0030] ⑵Heat the polyol to 100℃~110℃ for dehydration for 0.5~1.5h, then cool down to 45~55℃, then add polyisocyanate, raise the temperature to 85~95℃, and keep it warm at this temperature for 1.5~2.5h; after that Cool down to ...
Embodiment 2
[0033] Embodiment 2 A cationic water-based polyurethane resin for wallpaper glue, the water-based polyurethane resin includes the following raw materials in parts by weight: polyol 100g; polyisocyanate 90g; first chain extender 30g; second chain extender 18g; salt forming Dose 7.26g.
[0034] Among them: polyol refers to polycarbonate polyol with a molecular weight of 1000~3000. Polyisocyanate refers to isophorone diisocyanate. The first chain extender refers to diethylene glycol. The second chain extender refers to triethanolamine. The salt-forming agent refers to glacial acetic acid.
[0035] The preparation method of the cationic water-based polyurethane resin for wallpaper glue is the same as in Example 1.
Embodiment 3
[0036] Embodiment 3 A cationic water-based polyurethane resin for wallpaper glue, the water-based polyurethane resin includes the following raw materials in parts by weight: polyol 85g; polyisocyanate 70g; first chain extender 15g; second chain extender 10.5g; Salt 6.5g.
[0037] Among them: polyol refers to polytetrahydrofuran ether polyol with a molecular weight of 1000~3000. Polyisocyanate refers to diphenylmethane diisocyanate. The first chain extender refers to 1,4-butanediol. The second chain extender refers to N-methyldiethanolamine. The salt forming agent refers to glycolic acid.
[0038] The preparation method of the cationic water-based polyurethane resin for wallpaper glue is the same as in Example 1.
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