A high-permeability water-in-oil type long-acting alkyl siloxane oligomer composition and its preparation method
An alkyl siloxane, water-in-oil type technology, applied in the field of alkyl siloxane oligomer emulsion and its preparation, can solve the problems of pollution, thermodynamic and kinetic instability, reduction of reactive points and the like
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Embodiment 1
[0041] Add 20 parts of deionized water, 3 parts of emulsifier AC-1815, and 2 parts of emulsifier E-1310 into the reaction flask, stir at 60-70°C for 0.5h to obtain a uniform water phase; weigh 70 parts of =5) linear oligomethylsiloxane (M 5 594) is added dropwise to the above-mentioned uniform water phase under the condition of maintaining 60-70°C, and stirred under the action of mechanical force to obtain a uniformly dispersed ethoxy structure-terminated oligomethylsiloxane dispersion; Continue to weigh 5 parts of aminoalkyl copolydimethylsiloxane resin (structure of molecular formula II) with the number of chain members (n=20) and add it to the oligomethylsiloxane dispersion terminated by the ethoxy structure, The high-permeability water-in-oil type long-acting alkylsiloxane oligomer composition with excellent stability can be prepared by using a digital display shear stirring emulsifier, keeping the rotating speed at 7000r / min, and shearing at a high speed for 0.5h.
Embodiment 2
[0043] Add 20 parts of deionized water, 3 parts of emulsifier betaine type fluorine emulsifier, 2 parts of Tween-80 into the reaction flask, stir at 50-60°C for 0.8h to obtain a uniform water phase; weigh 70 parts of n=5) linear oligoethylsiloxane (M 5664) dropwise added to the above-mentioned uniform water phase under the condition of maintaining 50-60°C, and stirred under the action of mechanical force to obtain a uniformly dispersed ethoxy structure-terminated oligoethylsiloxane dispersion; Continue to weigh 5 parts of aminoalkyl copolydimethylsiloxane resin with chain number (n=20) and add it to the oligoethylsiloxane dispersion terminated by ethoxy structure, and use digital display to shear and stir The emulsifier maintains a rotational speed of 6000r / min and shears at a high speed for 0.5h to produce the high-permeability water-in-oil long-acting alkylsiloxane oligomer composition with excellent stability.
Embodiment 3
[0045] Add 20 parts of deionized water, 3 parts of emulsifier Span-60, and 2 parts of emulsifier OP-20 into the reaction bottle, and stir at 30-40°C for 1 hour to obtain a uniform water phase; weigh 70 parts of the chain number (n= 5) Linear oligopropyl siloxane (M 5 734) dropwise added to the above-mentioned homogeneous water phase under the condition of maintaining 30-40 ° C, and stirred under the action of mechanical force to obtain a uniformly dispersed ethoxy structure-terminated oligopropyl siloxane dispersion; continue Weigh 5 parts of aminoalkyl copolydimethylsiloxane resin with chain number (n=20) and add it to the dispersion of oligopropylsiloxane terminated with ethoxy structure, and use a digital shear stirring emulsifier to , keeping the rotation speed at 5000r / min, and shearing at a high speed for 0.5h, the high-permeability water-in-oil long-acting alkylsiloxane oligomer composition with excellent stability can be prepared.
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Abstract
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