Stably foamed polyisocyanurate foam material and its preparation method
A technology of polyisocyanurate and foam materials, which is applied in the field of producing polyisocyanurate foam materials and producing composite materials for polyisocyanurate foam materials, can solve the problem that it is difficult to achieve C-level flame retardant polyisocyanurate. Cyanurate foam material production, poor dimensional stability, high foam density and other problems, to achieve the effect of improving foam fluidity, high dimensional stability, and small foam shrinkage
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[0058] The following examples will further illustrate the method provided by the present invention, but the present invention is not limited to the listed examples, and should also include any other known changes within the claimed scope of the present invention.
[0059] The raw material involved in the embodiment has:
[0060] 1. Combination material:
[0061] Polyol 1 with a hydroxyl value of 315mgKOH / g and an average functionality of 2 formed by polycondensation of phthalic anhydride and diethylene glycol, which is commercially available, such as PS-3152 (Nanjing Jinling Stepan Chemical Co., Ltd.);
[0063] Polyol 2 with a hydroxyl value of 200 mgKOH / g and an average functionality of 3 formed by polycondensation of trimellitic anhydride, terephthalic acid and diethylene glycol, its preparation method can refer to the examples in patent CN201080005638.4;
[0064] Polyol 3 with a hydroxyl value of 320 mgKOH / g and an average functionality of 3....
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