Ultra-high temperature expandable thermoplastic microspheres and its preparation method and application
A thermoplastic microsphere, ultra-high temperature technology, applied in the field of expandable microsphere and its preparation, can solve the problems of increasing the amount of acrylonitrile, increasing the production cost, affecting the expandability of the microsphere, etc., achieving excellent foaming performance, high resistance Excellent heat resistance and gas barrier properties, heat resistance and gas barrier properties
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Embodiment 1
[0051] Embodiment 1, microsphere preparation
[0052] water box:
[0053]
[0054] Oil phase:
[0055]
[0056] The oil phase and the water phase were dispersed by stirring at 7000 rpm for 2 minutes with a homomixer to prepare a suspension solution. Immediately inject the suspension solution into a 1-liter high-pressure reactor, replace the air with nitrogen, and pressurize the reactor to reach an initial pressure of 0.3 MPa. Then, polymerization was carried out at 60° C. for 20 hours to obtain a liquid weight containing microspheres with a solid content of 26%.
[0057] The basic expandable microspheres were obtained by filtering, washing, and drying. The relevant properties of the microspheres are shown in Table 1.
Embodiment 2
[0058] Embodiment 2, microsphere preparation
[0059] water box:
[0060]
[0061] Oil phase:
[0062]
[0063] The oil phase and the water phase were dispersed by stirring at 7000 rpm for 2 minutes with a homomixer to prepare a suspension solution. Immediately inject the suspension solution into a 1-liter high-pressure reactor, replace the air with nitrogen, and pressurize the reactor to reach an initial pressure of 0.3 MPa. Then, a polymerization reaction was carried out at 60° C. for 20 hours to obtain a liquid containing microspheres with a weight solid content of 26%.
[0064] After filtering, washing and drying, the basic expandable microspheres were obtained, and the relevant properties of the microspheres are shown in Table 1.
Embodiment 3
[0080] Embodiment 3, surface treatment
[0081] Add 5 g of aziridine cross-linking agent to 558 g of the liquid obtained by polymerization in Preparation Example 2, stir evenly at room temperature, then transfer to a reactor for heating reaction, and react at 100° C. for 5 h. The resulting product was filtered and dried to obtain ultra-high temperature expanded microspheres, and the properties of the microspheres are listed in Table 2.
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