High temperature expanded polymer microspheres and preparation method thereof
A high-temperature expansion and polymer technology, which is applied in the field of high-temperature expansion polymer microspheres and its preparation, can solve the problems of low expansion ratio, insufficient heat resistance, low foaming agent coating rate, etc., and achieve good heat resistance and crystallization performance, excellent barrier performance and air tightness, and the effect of small film permeability coefficient
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[0111] The high temperature expansion polymer microspheres of the present invention are prepared according to the following steps
[0112] 1. Preparation of Aqueous Dispersion Compositions
[0113] ① Preparation of raw material aqueous solution
[0114] a. Preparation of dispersant solution
[0115] In 160 parts by weight of deionized water, add 0.12 to 1 part by weight of dispersant, dissolve, stir evenly, and set aside;
[0116] b. Preparation of aqueous polymerization inhibitor solution
[0117] In 350 parts by weight of deionized water, add 36 to 120 parts by weight of sodium chloride, dissolve, and set aside;
[0118] c.. Preparation of dispersing aid sodium nitrite aqueous solution
[0119]A 1wt% sodium nitrite aqueous solution was prepared with deionized water, for subsequent use;
[0120] d. Preparation of hydrazine hydrate aqueous solution
[0121] Prepare a 1wt% hydrazine hydrate aqueous solution with deionized water, for subsequent use;
[0122] e. Preparatio...
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