A kind of organosilicon polyether copolymer and its preparation method and application
A polyether copolymer and silicone technology, applied in the field of foam stabilizers, can solve problems such as easy delamination, poor compatibility, and poor storage stability
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[0052] In addition, the present application also provides a method for preparing the above silicone polyether copolymer, which includes the following steps: preparing according to the structure of the silicone polyether copolymer.
[0053] Specifically, polydimethyl-methylhydrogensiloxane, allyl polyetherene whose end is polybenzyl ether, and allyl polyether whose end is hydroxyl or alkyl are used as reaction raw materials in the first catalyst and auxiliary The reaction is carried out in the presence of a catalyst to obtain a silicone polyether copolymer.
[0054] In an optional embodiment, the above-mentioned first catalyst is a chloroplatinic acid catalyst, and the cocatalyst includes N,N-dimethylaniline, N,N dimethylformamide, isooctyl alcohol, triethylamine, ethylenediamine and at least one of triphenylphosphine.
[0055] In an optional embodiment, the amount of the cocatalyst is 3-80ppm, such as 3ppm, 5ppm, 10ppm, 20ppm, 50ppm, 60ppm or 80ppm, etc. of the total mass of ...
Embodiment 1
[0073] This embodiment provides a silicone polyether copolymer, which is prepared in the following manner:
[0074] (1) Add 175.0 g of octamethylcyclotetrasiloxane, 14.9 g of tetramethylcyclotetrasiloxane, and 10.1 g of hexamethyldisiloxane into the reactor, and react for 8 hours at 30°C under the action of 5 g of sulfuric acid, Polydimethyl-methylhydrogensiloxane is obtained.
[0075] (2) Add 71.9 g of allyl polyether with hydroxyl terminal and 28.1 g of brominated polybenzyl ether into the reactor, and react at 25°C for 24 hours under the action of 0.15 g of sodium hydride catalyst and 80 g of tetrahydrofuran solvent to obtain Allyl polyethers of polybenzyl ethers;
[0076] (3) 59.6 g of the above-mentioned polydimethyl-methylhydrogen siloxane, hydroxyl-terminated allyl polyether CH 2 =CHCH 2 O(CH 2 CH 2 O) 10 (CH 2 CHCH 3 O) 4 H38.7g, 51.6g of the above-mentioned allyl polyether with polybenzyl ether at the end was added to the reactor, and in the presence of 6ppm ...
Embodiment 2
[0083] This embodiment provides a silicone polyether copolymer, which is prepared in the following manner:
[0084] (1) Add 173.6 g of octamethylcyclotetrasiloxane, 17.2 g of tetramethylcyclotetrasiloxane, and 9.3 g of hexamethyldisiloxane into the reactor, and react for 8 hours at 35°C under the action of 2 g of sulfuric acid, Polydimethyl-methylhydrogensiloxane is obtained.
[0085] (2) Add 57.8 g of allyl polyether with terminal hydroxyl group and 42.2 g of brominated polybenzyl ether into the reactor, react at 25°C for 24 hours under the action of 0.20 g of sodium hydride catalyst and 100 g of tetrahydrofuran solvent, and obtain a poly Allyl polyethers of benzyl ether;
[0086] (3) 46.6 g of the above-mentioned polydimethyl-methylhydrogen siloxane, hydroxyl-terminated allyl polyether CH 2 =CHCH 2 O(CH 2 CH 2 O) 13 (CH 2 CHCH 3 O) 5 H47.8g, 55.6g of allyl polyether whose end is polybenzyl ether were added to the reactor, and heated under normal pressure in the pres...
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