Preparation of block water-soluble silicon oil
A water-soluble silicone oil and block technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of fabric hand feeling decline, achieve self-emulsifying performance improvement, convenient use, and solve the effect of easy demulsification
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Embodiment 1
[0028] (1) Preparation of amidated amino coupling agent
[0029] 20 g of γ-aminopropylmethyldimethoxysilane and 10 g of formic acid (purity: 98%) were subjected to amidation reaction in 150 g of toluene, and stirred (100 rpm) at a temperature of 85° C. for 1 h. Distill water (85°C) azeotropically with toluene, and then vacuum out unreacted formic acid to obtain amidated coupling agent.
[0030] (2) Preparation of terminal hydromethyl siloxane intermediate
[0031] Put 80 grams of octamethylcyclotetrasiloxane and 20 grams of 1,1,3,3-tetramethyldisiloxane into a four-necked bottle, and add 5 grams of the above two raw materials prepared in step (1) at the same time Amidate the coupling agent, stir and react for 0.5h (80 rpm) at a temperature of 60°C, add 0.5g of concentrated sulfuric acid, and perform an equilibrium reaction for 10h at a temperature of 70°C, and then vacuumize to remove low-molecular substances. A terminal hydromethylsiloxane intermediate with a viscosity (25°...
Embodiment 2
[0037] In embodiment 1, 20 grams of γ-aminopropylmethyl dimethoxysilane is changed to 20 grams of γ-aminopropyl ethyl dimethoxysilane, and 80 grams of octamethylcyclotetrasiloxane are changed to 80 gram of low-viscosity hydroxyl silicone oil (25°C, 50mp*s), 0.5 gram of concentrated sulfuric acid was changed to 0.4 gram of trifluoromethanesulfonic acid, and the allyl polyether was CH 2 =CHCH 2 O(C 2 h 4 O) a H (a=20), change isopropanol to toluene, platinum catalyst adopts the isopropanol solution of chloroplatinic acid, all the other are the same as embodiment 1.
Embodiment 3
[0039] In embodiment 1, 20 grams of γ-aminopropylmethyldimethoxysilane is changed to 20 grams of γ-aminoethylmethyldimethoxysilane, and 80 grams of octamethylcyclotetrasiloxane is changed to 80 gram of low-viscosity hydroxy silicone oil (25°C, 70mp*s), 0.5 gram of concentrated sulfuric acid is changed to 0.3 gram of activated clay, and allyl polyether is CH 2 =CHCH 2 O(C 2 h 4 O) a H (a=10), the isopropanol was changed to butyl acetate, the platinum catalyst was platinum chloride in absolute ethanol, and the rest were the same as in Example 1.
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