Fluoroalkyl-modified composite organosilicon water-proofing agent and preparing method and application thereof
A fluoroalkyl siloxane and composite technology, which is applied in the field of fluoroalkyl modified composite organic silicon waterproofing agent and its preparation, can solve the difficulty of achieving a balance between penetration depth and hydrophobicity, liquid silane protective agent Problems such as low penetration depth can solve the problem of emulsion stability, excellent waterproof effect, and improve the effect of permeability
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[0045] Example 1
[0046] (1) First stir 10g of composite emulsifier Gransurf61+Gransurf71 (mass ratio is 1:1), 20g of polyvinyl alcohol (Changchun, Taiwan BP-17), 10g of silane coupling agent KH-550 and 10g of aluminum sulfate O / W Emulsion A was formed by dissolving in 174 g of water at 70°C.
[0047] (2) 10g of composite emulsifier Gransurf61+Gransurf71 (mass ratio is 1:1), 150g of n-butyltriethoxysilane, 100g of n-dodecyltriethoxysilane, 400g of tridecyl fluoride Octyltriethoxysilane was added to the remaining 116 g of water and stirred well to form W / O Emulsion B.
[0048] (3) After the emulsion A is completely dissolved, drop the emulsion B into the emulsion A at a rate of 1 mL / min with a peristaltic pump, and stir while dropping, and the stirring speed is 5000 r / min. The beaker was ice-water bath to remove the heat in time, phosphoric acid was added to adjust the pH value of the system to 6 after the dropwise addition, and the stirring was stopped after 15min to prepar...
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[0049] Example 2
[0050] (1) 8g of composite emulsifier Gransurf71+Gransurf77 (mass ratio of 1:3), 30g of polyvinyl alcohol (Changchun, Taiwan BP-24), 20g of silane coupling agent KH-560 and 30g of aluminum sulfate were stirred and dissolved O / W Emulsion A was formed in 232 g of water at 50°C.
[0051] (2) 12g of composite emulsifier Gransurf71+Gransurf77 (mass ratio is 1:3), 100g of n-butyltrimethoxysilane, 100g of n-tetradecyltriethoxysilane, 400g of pentafluorononane W / O Emulsion B was formed by adding triethoxysilane to the remaining 68 g of water and stirring well.
[0052] (3) After the emulsion A is completely dissolved, drop the emulsion B into the emulsion A with a peristaltic pump at a rate of 5 mL / min, and stir while adding, and the stirring speed is 6000 r / min. The beaker was ice-water bath to remove the heat in time, and boric acid was added to adjust the pH value of the system to 3 after the dropwise addition, and the stirring was stopped after 5 minutes to pr...
Example Embodiment
[0053] Example 3
[0054] (1) First, 12g of composite emulsifier sodium dodecylbenzenesulfonate + Gransurf71 (mass ratio of 3:1), 20g of polyvinyl alcohol (Sinopec 1788), 10g of silane coupling agent KH-570 and 10 g of aluminum sulfate was dissolved in 203 g of water at 60°C with stirring to form O / W emulsion A.
[0055] (2) 8g composite emulsifier sodium dodecylbenzenesulfonate+Gransurf71 (mass ratio is 3:1), 100g n-hexyltriethoxysilane, 150g n-decyltriethoxysilane, 400g The heptadecafluorodecyltriethoxysilane was added to 87 g of water and stirred well to form W / O emulsion B.
[0056] (3) After the emulsion A is completely dissolved, use a peristaltic pump to drop the emulsion B into the emulsion A at a rate of 10 mL / min, and stir while dropping, and the stirring speed is 5500 r / min. The beaker was ice-water bath to remove heat in time, and after the dropwise addition, hydrochloric acid was added to adjust the pH value of the system to 4, and the stirring was stopped after...
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