Dust-free writing liquid for teaching black board
A technology for writing liquid and blackboard, applied in the field of dust-free writing liquid, can solve problems such as complex composition, and achieve the effects of strong erasability, good chemical stability and smooth writing
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Embodiment 1
[0010] In terms of 50g per part by weight, take: 450g of titanium dioxide, 25g of glycerin, 1.25g of leveling agent NP-10, 0.4g of sodium hexametaphosphate, 50g of dioctyl sebacate, 5g of Pingpingjia-15, polyethylene glycol bis Stearate 5g, titanate coupling agent 5g, ammonia water 3.25g, polyoxyethylene alcohol resin 17-88 180g, polyoxyethylene alcohol resin 17-99 (S) 270g, water (deionized water) 1050g for later use.
[0011] First, under the stirring condition of 70-100 rpm, slowly add polyoxyethylene alcohol resin 17-88180g, 17-99(S) 270g into 1050g water at about 20℃ to fully swell and disperse, and then directly heat with water vapor The method is to raise the temperature to 95° C., keep it warm for 2 to 2.5 hours, and then filter impurities through 28-mesh stainless steel to obtain 1500 g of emulsion for later use.
[0012] Mix 450g of pigment titanium dioxide with 25g of active agent glycerin, 1.25g of leveling agent NP-10, 0.4g of diffusing agent sodium hexametaphosph...
Embodiment 2
[0016] In terms of 50g per part by weight, take: 500g of titanium dioxide, 30g of glycerin, 1.4g of leveling agent NP-10, 0.5g of sodium hexametaphosphate, 50g of dioctyl sebacate, 5g of Pingpingjia-15, polyethylene glycol bis Stearate 6g, titanate coupling agent 6g, ammonia water 3.25g, polyoxyethylene alcohol resin 17-88 160g, polyoxyethylene alcohol resin 17-99 (S) 320g, water (deionized water) 1120g for later use.
[0017] First, under the condition of stirring at 70-100 rpm, slowly add 17-88160g and 17-99(S)320g of polyoxyethylene alcohol resin into 1120g of water at about 20°C to fully swell and disperse, and then directly heat with water vapor Raise the temperature to 95° C., keep it warm for 2 to 2.5 hours, and then filter impurities through 28-mesh stainless steel to obtain 1600 g of emulsion for later use.
[0018] Mix 500g of pigment titanium dioxide with 30g of active agent glycerin, 1.4g of leveling agent NP-10, 0.5g of diffusing agent sodium hexametaphosphate, 50...
Embodiment 3
[0022] In terms of 50g per part by weight, take: 600g of titanium dioxide, 31.5g of glycerin, 1.5g of leveling agent NP-10, 0.55g of sodium hexametaphosphate, 62.5g of dioctyl sebacate, 6.25g of Pingpingjia-15, polyethylene Diol distearate 6.25g, titanate coupling agent 6.25g, ammonia 3.5g, polyoxyethylene alcohol resin 17-88 165g, polyoxyethylene alcohol resin 17-99 (S) 330g, water (deionized water) 1155g for subsequent use.
[0023] First, under the condition of stirring at 70-100 rpm, slowly add 17-88165g of polyoxyethylene alcohol resin, 17-99(S)330g of water to 1155g of water at about 20°C to fully swell and disperse, and then directly heat with water vapor Raise the temperature to 95° C., keep it warm for 2 to 2.5 hours, and filter impurities through 28-mesh stainless steel to obtain 1650 g of emulsion for later use.
[0024] Mix 600g of pigment titanium dioxide with 31.5g of active agent glycerin, 1.5g of leveling agent NP-10, 0.55g of diffusing agent sodium hexametaph...
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